| Title | Pages | Publication | Code | Date | Publisher | System (Setting) |
|---|
 10 Ways to Improve your GM Skills NOW | 10-12 |  Protodimension | 5 | Sum 2010 | Kinstaff Media | Call of Cthulhu (Classic) | |
 100 1920s Gangster Names | |  100 1920s Gangster Names | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Classic) | |
| 100 Books to Find in Miskatonic Country | | 100 Books to Find in Miskatonic Country | | May 2021 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Books to Find in the Miskatonic Library (That Aren't in the Restricted Section) | | 100 Books to Find in the Miskatonic Library (That Aren't in the Restricted Section) | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Creepy Things and Events to Encounter Outdoors II | | 100 Creepy Things and Events to Encounter Outdoors II | AGF0005 | 2016 | Azukail Games | Call of Cthulhu (Classic) | |
| 100 Creepy Things and Events to Encounter When Travelling | | 100 Creepy Things and Events to Encounter When Travelling | AGF0020 | 2017 | Azukail Games | Call of Cthulhu (Classic) | |
| 100 Gangster Goods of the 1920s, Vol 1 | | 100 Gangster Goods of the 1920s, Vol 1 | D10D-G007 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Gangster Goods, Vol 2 | | 100 Gangster Goods, Vol 2 | D10D-G008 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Gangsters, Gun Molls and Goons | 1-11 | 100 Gangsters, Gun Molls and Goons | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Haunted Adventure Hooks: Mansion of Horrors | | 100 Haunted Adventure Hooks: Mansion of Horrors | | Feb 2023 | Doppelganger Publishing | Call of Cthulhu (Classic) | |
| 100 Items in a 1920's Femme Fatale's Purse | | 100 Items in a 1920's Femme Fatale's Purse | D10D-G009 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Items in a Gangster's Pocket | | 100 Items in a Gangster's Pocket | D10D-G006 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Items in a Prohibition Agent's Pocket | | 100 Items in a Prohibition Agent's Pocket | D10D-G011 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Locations for Miskatonic Country | | 100 Locations for Miskatonic Country | | Aug 2023 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Notes and Letters to Find in Miskatonic Country :Arkham | 1-5 | 100 Notes and Letters to Find in Miskatonic Country: Arkham | AGMRT0001 | Dec 2020 | Azukail Games | Call of Cthulhu (Classic) | |
 100 Notes and Letters to Find in Miskatonic Country: Arkham II | | 100 Notes and Letters to Find in Miskatonic Country: Arkham II | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Notes and Letters to find in Miskatonic Country: Dunwich and Innsmouth | | 100 Notes and Letters to Find in Miskatonic Country: Dunwich and Innsmouth | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Notes and Letters to Find in Miskatonic Country: Kingsport | | 100 Notes and Letters to Find in Miskatonic Country: Kingsport | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Oddities for a Creepy Old House | | 100 Oddities for a Creepy Old House | SKPE1421 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| 100 People to Encounter in Arkham | | 100 People to Encounter in Arkham | | Sep 2022 | Chaosium | Call of Cthulhu (Classic) | |
| 100 People to Encounter in Kingsport | 1-12 | 100 People to Encounter in Kingsport | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters | | 100 Pulp Mythos Characters | | 2020 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters Vol 2 | | 100 Pulp Mythos Characters Vol 2 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters Vol 3 | | 100 Pulp Mythos Characters Vol 3 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters Vol 4 | | 100 Pulp Mythos Characters Vol 4 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters Vol 5 | | 100 Pulp Mythos Characters Vol 5 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters Vol 6 | | 100 Pulp Mythos Characters Vol 6 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Rumours to Hear in Lovecraft Country | | 100 Rumours to Hear in Miskatonic Country | AGMRF0001 | May 2020 | Azukail Games | Call of Cthulhu (Classic) | |
| 100 Shops, Stores and Businesses to Find in Arkham | 1-18 | 100 Shops, Stores and Businesses to Find in Arkham | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | |
| 100 Speakeasies of the Roaring 20's | | 100 Speakeasies of the Roaring 20's | D10D-G003 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Speakeasy Drinks | | 100 Speakeasy Drinks | D10D-G005 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Speakeasy Encounters | | 100 Speakeasy Encounters | D10D-G004 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Speakeasy Names | | 100 Speakeasy Names | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Classic) | |
| 100 Stat Blocks | | 100 Stat Blocks | | Jun 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| 100 Things Overheard in a 1920s Speakeasy Vol 1 | | 100 Things Overheard in a 1920s Speakeasy Vol 1 | D10D-G013 | 2020 | D10 Dimensions | Call of Cthulhu (Classic) | |
| 100 Things to Find on a 1920s Gangster | | 100 Things to Find on a 1920s Gangster | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Classic) | |
| 100 Things to Find on a 1920s Law Enforcement Officer | | 100 Things to Find on a 1920s Law Enforcement Officer | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Classic) | |
| 100 Weird Houses and Other Spooky Places | | 100 Weird Houses and Other Spooky Places | | 2020 | Doppelganger Publishing | Call of Cthulhu (Classic) | |
| 100 Weird Houses and Other Spooky Places Vol 2 | | 100 Weird Houses and Other Spooky Places Vol 2 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Classic) | |
| 100 Weird Houses and Other Spooky Places Vol 3 | | 100 Weird Houses and Other Spooky Places Vol 3 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Classic) | |
| 13 Cursed Sigils | |  Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Classic) | |
 13 Ghosts | 195-202 |  The Dread House | HDG8000 | 2017 | Hammerdog Games | Pathfinder, Dungeons and Dragons, Call of Cthulhu (Classic) | Pennsylvania; 1921 |
| 1920s Era Characters | 8-37 | Sensitive Cases Division | | Aug 2023 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s Medicines | | Chaosium Digest | v01n04 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s NPC Generator | | 1920s NPC Generator | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Classic) | |
| 1920s Rogues Gallery Art Pack | | 1920s Rogues Gallery Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s Sample Gear and Prices | 30-34 |  Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s Sourcebook | 122-126 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s Timeline | 80-82 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| 1920s Timeline for Australis | 19-20 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The 1922 Wallal Solar Eclipse Expedition | 361-365 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The 1925 Arbeitsgemeinschaft deutscher Naturforscher zur Erhaltung reiner Wissenschaft Expedition | 366-375 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The 1930s | 99-120 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| 1930s Anthropology | | Chaosium Digest | v03n09 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| 1930s Archaeology | | Chaosium Digest | v03n09 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| 1930s Astronomy | | Chaosium Digest | v03n09 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| 1930s Chemistry | | Chaosium Digest | v03n09 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| 20 Encounters in the Ruins of the Elder Beings | 3-11 | 20 Encounters in the Ruins of the Elder Beings | | 2016 | Self Published | Call of Cthulhu (Classic) | |
| The 2022 Advent Calendar | | The 2022 Advent Calendar | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| 25 Items of Weird News | | 25 Items of Weird News | AGF0063 | 2020 | Azukail Games | Call of Cthulhu (Classic) | |
| ?? 4 | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| The "4" Base in Antarctica | | Cthulhu Maps - The "4" Base in Antarctica | 059 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| ?? 5 | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| ?? 6 | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| 60 NPC Portraits | | 60 NPC Portraits | | Jan 2021 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| 8 Surfaces | 61-62 | Protodimension | 19 | Spr 2014 | Kinstaff Media | Call of Cthulhu (Classic) | |
 ??? | |  Arbalest | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Balrog Banter | 4 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Dead Elf | 4 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Descending Darkness | 1 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Descending Darkness | 2 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Die Rubezahl | 1 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Die Rubezahl | 3 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Die Rubezahl | 3 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | First Strike | 4 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Intellect Devourer | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Making Movies | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Manic Depressive | 1 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Monstrous Perversions | 1 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Monstrous Perversions | 2 | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Omniverse | 1 | 1984 | Quartzlords | Call of Cthulhu (Classic) | |
| ??? | | Once in a Lifetime | 1 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Sauron Strikes Back | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Sound and Fury | 4 | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Starquestor | 1 | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Bubonic Plagiarist | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Bubonic Plagiarist | 2 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Bubonic Plagiarist | 3 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Fiery Cross | 3 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Immortal Minority | 2 | 1987 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Trizine | 2 | 1986 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Trizine | 3 | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Doomed Dwarves' Journal | | 1985 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Pegasus | | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Stielkrieg | | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Terror Australis | | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Impaler | | 1984 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Journal of the Britannic Technology Society | | | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Ab Chaos | 1 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| ??? | | Game Trade Magazine | 53 | Jul 2004 | Alliance Game Distributors | Call of Cthulhu (Classic) | |
| ??? | | Interregnum | 30 | May 1999 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | Vienna | 7 | Feb 1995 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Blasphemous Tome | 3 | Dec 2017 | Self Published | Call of Cthulhu (Classic) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Aani / Sacred Vessels of Ancient Gods | Oct 2023 |  shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ab Initio | 283-285 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | New Zealand; January; 1934 |
| The Abandoned Church | 8 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| An Abandoned Warehouse | | Cthulhu Maps - An Abandoned Warehouse | 105 | Sep 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Abbey of Fear | | Cthulhu Maps - The Abbey of Fear | 091 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| An Abduction | 47-53 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | New York; 1933; September |
| Abigail Merritt, Linguist | | Hypergraphia | 1 | Nov 2018 | Gladius Games | Call of Cthulhu (Classic) | |
| Abigail's Folly | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Abominations of the Amazon | 50-65 | Age of Cthulhu Vol. V: Long Reach of Evil | 7005 | 2011 | Goodman Games | Call of Cthulhu (Classic) | Peru; Summer; 1927 |
| Abominations of the Amazon | 2-17 | Age of Cthulhu: Abomination of the Amazon | FRPGD10 | 2010 | Goodman Games | Call of Cthulhu (Classic) | Peru; Summer; 1927 |
| The Aboriginals | 21-33 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
 About "Payrus of the Dark Wisdom" | 257 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| About "Psalms of the Silent" | 273 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| About "The Eibonic Rituals" | 301 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| About Investigators | 36-47 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| About Investigators | 35-50 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| About Investigators | 18-27 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| About Monstres | 5-9 | Ye Booke of Monstres I | CHA2349 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| About the Cult of the Small Crawler | 277-282 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| About the Cult of the Small Crawler | 305-311 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| About the Nation | 8-10 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Above and Beyond | | Chaosium Digest | v33n04 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; April; 1926 |
| Above and Beyond | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; April; 1926 |
| Absolute and Utter Cthulhu | 12-16 | Role Player Independent | 1 | Dec 1992 | Symbiosis Publishing | Call of Cthulhu (Classic) | |
| Abyssal Bats | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Accounts of Violence | | Terror of Octobernomicon | GGP2201 | 2022 | Golden Goblin Press | Call of Cthulhu (Classic) | Austria |
| Accursed Thieves | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Achtung! Cthulhu Miniatures | 12-15 | Rise of the Black Sun | MUH050480 | 2016 | Modiphius Entertainment | Call of Cthulhu (Classic) | |
| Achtung! Cthulhu Skirmish: Rise of the Black Sun | 3-11 | Rise of the Black Sun | MUH050480 | 2016 | Modiphius Entertainment | Call of Cthulhu (Classic) | |
| The Acolyte of the Flame | 357-365 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Acolyte of the Ultimate Gate | 28-35 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | London; 1920s |
| Act I: The City | 38-205 | Heinrich's Call of Cthulhu Guide to Carosa | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Carcosa |
| Act II: The Palace | 206-304 | Heinrich's Call of Cthulhu Guide to Carosa | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Carcosa |
| Adapting the Sanity and Magic systems of Unknown Armies to Call of Cthulhu | | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic), Unknown Armies | |
| The Adder | 105-122 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Adder | 155-184 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Adding Magical Flavor to CoC | | Chaosium Digest | v18n08 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Additional Deities, Races and Monsters for the Cthulhu Mythos | 20-26 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Adjustment | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Administrative Trivia | 40-47 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Adoazar | Sep 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Adventure Begins | A:14-17 |  Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Providence; 1927; May |
| Adventuring in Hungary | 27-37 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Adventuring in Morocco | 76-83 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Adversaries of the Dark Character: Stemming the Tide of Darkness | 12-20 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Advice for Players | 208-223 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Aerial Warfare in Call of Cthulhu | 36-37 | Space Gamer | 83 | Oct 1988 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| Africa's Dark Sects | 136-138 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Africa's Dark Sects | 129-130 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| African Bestiary | 94-107 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The African Leopard Men | 6-7 | Different Worlds | 39 | May 1985 | Chaosium | Call of Cthulhu (Classic) | |
| The African People | 35-52 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| After the Funeral | Sep 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| After the Great War | 9 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| After the Storm | | After the Storm | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Afterlives | |  Afterlives | SFX4004 | 2018 | Stygian Fox | Call of Cthulhu (Classic) | |
| Aftermath | 115-116 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | 1929; August |
| Against a Sea of Brilliant White | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Ageless | 1-10 | The Ageless | | 2018 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Agonists | Apr 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Agony at Sea | 2-11 | Agony at Sea | | 1997 | RPGA Network | Call of Cthulhu (Classic) | Atlantic Ocean; 1912 |
| Aihuqoth | Aug 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ailurophobia | Sep 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Air Travel in Europe in the Early 1920s | A:36-40 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Airport 1991 | 32-35 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1991 |
| Akaname | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Albert Pitler | 115-123 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Alchemical Societies | 9-21 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Alchemist Occupation Guide | 1-6 | The Codex Alchemica: Alchemist Occupation Guide | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Alchemists | 34-44 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Alchemy | 3-10 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Alcheringa | 34-40 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Alcheringa | 129-154 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Algeciras | 15-113 | Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) | |
| Alhazred's Guide to the Musical Spheres | 95-103 | Bayt al Azif | 6 | Feb 2026 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Alhireth-Hotep the Prophet | 1-2 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| An Alien Kicked Sand in My Face | 38-49 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | California; 1950s; Non-Mythos |
| Alien Races | 150-164 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Alien Races | 53-66 | Keeper's Compendium | CHA2344 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Alien Technology | 156-159 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Alien Technology | 176-180 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Alienist | 8-19 | Dark Visions From Beyond | 0 | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Alive and Kicking | 50-60 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | England; 1960s; Non-Mythos |
| The Alkahest | 88-95 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| All Good Children | 132-145 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Pennsylvania; 1990s |
| All Hallows' Eve | 1-7 | All Hallows' Eve | | 2012 | Self Published | Call of Cthulhu (Classic) | October |
| All Horror is Mythos Horror | 6-7 | White Wolf | 29 | Oct 1992 | White Wolf Games | Call of Cthulhu (Classic) | |
| All is Not Well In The City of Angels | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Los Angeles; August; 1954; Nightgaunt |
| All is Not Well In The City of Angels Part 1 | | Chaosium Digest | v16n07 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; August; 1954; Nightgaunt |
| All is Not Well in The City of Angels Part 2 | | Chaosium Digest | v16n08 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; August; 1954; Nightgaunt |
| All Palid and Wan | 4-17 | All Palid and Wan | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | England; August; 1925 |
| All Part of the Game | | All Part of the Game | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| All Roads Point South | | All Roads Point South | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | February; 1925 |
| The All-Seeing Eye of the Alskali | 57-74 | Pursuit to Kadath | T-3 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Turkey; 1923; July |
| Almanac of the 1920s | 55-58 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Almost the Interview of a Lifetime | | Harvest Time | 2 | | Self Published | Call of Cthulhu (Classic) | |
| Alone Against Nyarlathotep | | Alone Against Nyarlathotep | | Apr 2024 | Chaosium | Call of Cthulhu (Classic) | England; 1925; Nyarlathotep |
| Alone Against the Dark | 6-64 | Alone Against the Dark | CHA2312 | 1985 | Chaosium | Call of Cthulhu (Classic) | Germany; Egypt; New York; Antarctica; Greece; 1931; Autumn |
| Alone Against the Dark | 5-90 | Alone Against the Dark | CHA23154 | 2017 | Chaosium | Call of Cthulhu (Classic) | Germany; New York; Greece; Antarctica; Egypt; Autumn; 1931 |
| Alone Against the Dark: Unauthorised Alterations | | Dagon | 13 | Jun 1986 | Self Published | Call of Cthulhu (Classic) | |
| Alone Against the Flames | 3-63 | Alone Against the Flames | CHA23145 | 2015 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Alone Against the Flames | A:6-55 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Alone Against the Flames | A:6-55 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Alone Against the Frost | | Alone Against the Frost | CHA23164 | 2019 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Alone Against the Tide | | Alone Against the Tide | | Jun 2018 | Self Published | Call of Cthulhu (Classic) | New England |
| Alone Against the Tide | | Alone Against the Tide | CHA23174 | 2020 | Chaosium | Call of Cthulhu (Classic) | New England |
| Alone Against the Wendigo | 6-64 | Alone Against the Wendigo | CHA2311 | 1985 | Chaosium | Call of Cthulhu (Classic) | Canada |
| Alone on Halloween | 2-59 | Alone on Halloween | PAG1000 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts |
| Alone on the Lake | | Cthulhu Maps - Alone on the Lake | 065 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Along Came a Crystal | | Along Came a Crystal | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Along the Indus | 93-104 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | India |
| Alpaca on a Plane | 4-14 | Alpaca on a Plane | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Scotland; 2020s |
| Altercation on West Armitage Street | 18-19 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Arkham |
| Alternative Armament for Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Alternative Asylum Ratings and the Recovery from Indefinite Insanity | 110-111 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Alternative Backstory Tables | | Alternative Backstory Tables | | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Alternative Rules | 126-135 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Alton H Blackington | 66-67 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Amber Waves | | Chaosium Digest | v24n06 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | Kansas |
| The Amber Wizard | 3-13 | The Amber Wizard | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; February; 1929 |
| Amelia's Friends | | Amelia's Friends | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Oceania; 1937 |
| America | 99-176 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | New York; 1925 |
| American Ghoul | 1-24 | American Ghoul | | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | Colorado; 1924 |
| The American Legal System | 9-20 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| American Police Weapons | 92-98 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| American Shotguns, 1860 to 1940 | 5-12 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Gaslight), Call of Cthulhu (Classic) | |
| Amidst the Ancient Trees | 346-363 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | Vermont; Summer; 1925; Glaaki |
| Amidst the Ancient Trees | 346-363 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1925; Summer; Glaaki |
| Amidst the Ancient Trees | | Cthulhu Maps - Amidst the Ancient Trees | | Jul 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| Ammunition and Accessories | 99-104 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Amos-Goodrich Cemetery | 3-4 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Anachronomicon | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Germany |
| Anarchy's Call of Cthulhu Handbook | | Chaosium Digest | v22n11 | Dec 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Anarchy's CoC Tactics and Weapon Ideas | | Chaosium Digest | v22n12 | Jan 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Anatomy of Magic | 15-41 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Ancient (3000 BC - 499 AD) | 9-14 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Ancient and Modern | 27-37 | White Dwarf | 80 | Aug 1986 | Games Workshop | Call of Cthulhu (Classic), Advanced Dungeons and Dragons | Fantasy World; Europe; 20th Century AD |
| Ancient and Modern | 19-24 | White Dwarf | 81 | Sep 1986 | Games Workshop | Call of Cthulhu (Classic), Advanced Dungeons and Dragons | Europe; Fantasy World; 20th Century AD |
| Ancient Echoes | 24-54 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; Summer; 1925 |
| Ancient Midget Nazi Shamans | 64-75 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Germany; Chicago; Autumn; December; 1944; 1947; Non-Mythos |
| An Ancient Summoning | 191-216 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| And a Ghoul Hiding Under a Tree! | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | December; 1920s; Ghoul |
| And A Ghoul Hiding Under the Tree | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | December |
| And Some Fell on Stony Ground | 80-109 | Nameless Horrors | CHA23133 | 2015 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| And Some Fell on Stony Ground | 77-104 | Nameless Horrors | CHA23180 | 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| And the dogs shal know you | 44-59 | The Arkham Evil | T-1 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Arkham; 1923 |
| The Andaman Islands | B:28-35 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | India; 1927; Atlach-Nacha |
| The Andaman Islands | 94-105 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | India; 1927; Atlach-Nacha |
| Angel of Pestilence | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Angel of Prague | 1999 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | Czech Republic; March; 1939 |
| The Angel's Glow | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Tennessee; 1920s; Great Old One |
| Angel's Thirst | 233-282 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1923; Cthulhu |
| An Angeleno Grimoire | 146-159 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Animal Companions Fillable Character Sheets | | Animal Companions Fillable Character Sheets | | Feb 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Animal Compansions | | Animal Companions Volume 1 | | Feb 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Animal Handling in Call of Cthulhu | Apr 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Animals | 261-273 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Annals of Flint's Detective Agency: The Case of the Stolen Golf Clubs | | Annals of Flint's Detective Agency: The Case of the Stolen Golf Clubs | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | Egypt; Chicago; September; 1925 |
| Annotated Scenario Bibliography: Arkham | 62-75 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Annotated Scenario Bibliography: Aylesbury Pike | 42-43 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Annotated Scenario Bibliography: Innsmouth and Deep Ones | 110-115 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Annotated Scenario Bibliography: Wiches and Witchcraft | 115-119 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Annotations for the Book of Night | 184-190 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Anomalous Creature X-1968 | Aug 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Another Look At Insanity | | Chaosium Digest | v28n06 | Jul 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Another Mythos Book Sytem | | Chaosium Digest | v05n04 | Jan 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Antarctic Expedition Kit | 1-39 | Miskatonic University Antarctic Expedition Pack | CHA2381 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Antarktos | 1-2 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Antediluvians | 3-28 | The Antediluvians | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | South Dakota; August; 1935 |
| An Apartment I | | Cthulhu Maps - An Apartment I | 076 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| An Apartment II | | Cthulhu Maps - An Apartment II | 078 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Aperson Children | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Apocalypse Serpent | May 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Appendix A: The Professional Investigator | 56-60 | 1920s Investigator's Companion Vol. II | CHA2346 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix B: 1920s Forensics | 61-62 | 1920s Investigator's Companion Vol. II | CHA2346 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix I: Chaosium Pronunciations | 274-275 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix II: Describing the Indescribable | 276-281 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix III: Mortality & Immortality | 282 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix IV: Creating Original Monsters | 283-284 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Appendix V: The Dreamlands | 285 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| An Apple a Day | Jun 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Aqua Salaria | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Arcadia | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Arcane Antiquities | 82-101 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Arcane Knowledge: Egyptian Magic for Call of Cthulhu | 34-37 | Different Worlds | 47 | Aut 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The Arch-Nemesis | 34-35 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Archaeological Finds | 77 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Archaeologist | 98-111 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | |
| Archaeology | 35-38 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Archaeology | 30-31 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Archaeology | 42-46 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Archetype Development in Pulp Cthulhu | Mar 2023 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Archimedes 7 | | Curse of the Yellow Sign | | 2015 | John Wick Presents | Call of Cthulhu (Classic) | Space |
| Archimedes 7 | | Curse of the Yellow Sign Act 3: Archimedes 7 | 3 | 2010 | Wicked Dead Brewing | Call of Cthulhu (Classic) | Space |
| The Architect | 4-5 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| The Architect | 157-275 | Through a Glass Darkly | | 2011 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Architectural Styles in America | 48-53 | This Old Haunted House | CHA0361 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Architecture and Construction | 10-19 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Arctic Dreams | 2-12 | Arctic Dreams | | 1997 | RPGA Network | Call of Cthulhu (Classic) | Russia; 1932; January |
| Arctic Lands | | Cinematic Environs: Arctic Lands | | Sep 2018 | Critical Hit Publishing | Call of Cthulhu (Classic) | |
| Arkham | 37-41 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | Arkham; 1920s |
| Arkham 1928 | | Arkham 1928 | cr6200 | 2018 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham; 1928; October |
| The Arkham Adventures Advent Cthulendar | | The Arkham Adventures Advent Cthulendar | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham Asylum | | Cthulhu Maps - Arkham Asylum | 010 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Arkham Brochure | 1-2 | Arkham Brochure | AGMRPR0001 | Oct 2020 | Azukail Games | Call of Cthulhu (Classic) | |
| Arkham Case Files: Deep Morgue | 1-20 | Arkham Case Files: Deep Morgue | SOL0004 | 2012 | Solace Games | Call of Cthulhu (Classic) | Massachusetts |
| Arkham Curios | 37-42 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Arkham Electric Bill | 1-3 | Arkham Electric Bill | | Jan 2018 | Self Published | Call of Cthulhu (Classic) | |
| Arkham General | 4-16 | The Dreaming Prince | CHA0399 | 2011 | Chaosium | Call of Cthulhu (Classic) | Arkham; Great Race of Yith |
| Arkham Investigators | 25-36 | Arkham | CHA23182 | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham Miscellany | 37-60 | Arkham | CHA23182 | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham Police Station | | Cthulhu Maps - Arkham Police Station | 107 | Oct 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Arkham Sanitarium | 85-89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham Sanitarium Forms | 3-24 | Arkham Sanitarium | CHA2366 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham Sanitarium Forms | | Arkham Sanitarium Forms | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Arkham's Diners | 26-36 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Arkham's Markers | 20-21 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Armaments | 80-85 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Armed Forces | 38-42 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Armed Investigator | 4-34 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Armed Robbery | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Armored Angels | 78-92 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | Iraq; 1920s; Mi-Go; Dark Young of Shub-Niggurath |
| The Armstrong Malison | 1 | The Armstrong Malison | | 1990 | ADP Systems | Call of Cthulhu (Classic) | West Virginia |
| Arrival in New York | 26-36 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | New York; September; 1933 |
 Arrival of the Orient Express | 2:32 |  Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| An Arrow in Flight | 244-253 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933 |
| Art for China - Masks of Nyarlathotep | | Art Pack China - Masks of Nyarlathotep | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Art for Kenya - Masks of Nyarlathotep | | Art Pack Kenya - Masks of Nyarlathotep | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Art for New York - Masks of Nyarlathotep | | Art Pack New York - Masks of Nyarlathotep | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Art of Egypt- Masks of Nyarlathotep | | Art Pack Egypt- Masks of Nyarlathotep | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Art of England - Masks of Nyarlathotep | | Art Pack England - Masks of Nyarlathotep | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Art of Madness | 5-42 | The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920s |
| The Art of Madness | 1-21 | The Art of Madness | | 1987 | Self Published | Call of Cthulhu (Classic) | England; October; 1922 |
| The Art Show | 74-75 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Art Show | 76-77 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Arterial Blood | 1-2 | Arterial Blood | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; Y'Golonac |
| Artifacts and Alien Devices | 268-275 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Artifacts and Alien Devices | 268-275 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Artsy Fartsy | Aug 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Paris |
| As Above, So Below | 7-15 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Ascension of Hastorang | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Los Angeles; September; 1962 |
| The Ascension of Hastorang, Part 1 | | Chaosium Digest | v34n10 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; September; 1962 |
| The Ascension of Hastorang, Part 2 | | Chaosium Digest | v34n11 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; September; 1962 |
| The Ascension of Hastorang, Part 3 | | Chaosium Digest | v34n12 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1962; September |
| The Ascension of Hastorang, Part 4 | | Chaosium Digest | v35n01 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; September; 1962 |
| Ashes | Apr 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Assassin Masks | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Assassins | 24-42 | The Unspeakable Oath | 20 | Jun 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Assassins | 10-12 | Different Worlds | 37 | Nov 1984 | Chaosium | Call of Cthulhu (Classic) | |
| The Assassins | 170-188 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| An Assembly Plant | | Cthulhu Maps - An Assembly Plant | 109 | Dec 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Associated Book Trades | 28-30 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Astronaut | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Asylum | 37-38, 43-59 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Asylum | 36-51 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Asylum - Return of the Yellow Sign | 147-171 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| Asylums | 51-72 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| At Long Last | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| At One With Nature | | At One With Nature | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1920s |
| At Sea | 75-97 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; September; 1933 |
| At the Mountain Village | | At the Mountain Village | | Jul 2018 | Self Published | Call of Cthulhu (Classic) | Japan; 1920s |
| At The Mountains | 124-142 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; November; 1933 |
| At the Mountains of Madness | 281-368 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| At the Mountains of Murkiness | 465-473 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| At the Oil Fields | | Cthulhu Maps - At the Oil Fields | 121 | Nov 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| At the Salon | 1:26 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Atlantean Crystal | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Atlas of Arkham 1911 (Annotated) | 40-41 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Attack of the Brain Bats! | 1-14 | Attack of the Brain Bats! | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1923; Spring |
| The Attic Window | Jun 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Auction | 8-21 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | Austria |
| The Auction | 7-20 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Austria |
| The Auction | 139-165 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | New Orleans; 1956 |
| Aunt Joan's Little Treasure | Jun 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Aurora Blue | 63-91 | No Time To Scream | CHA23185 | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Alaska; 1927 |
| Australia | 134-170 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | Australia; 1925 |
| Australia | 150-188 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | Australia; 1925 |
| Australia | 449-518 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | Australia; 1925 |
| Australian Cities | 85-128 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Australian History and Geography | 9-32 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Australian Language | 10-14 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Australian Life in the 1920s | | Chaosium Digest | v08n10 | Nov 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Australian Pulp Fiction in the 1920s | 384-390 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Australians | 33-62 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| The Author | 27 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | New York; July |
| Author Spotlight on: H. P. Lovecraft | 28-30 | White Wolf | 7 | 1987 | White Wolf Games | Call of Cthulhu (Classic) | |
| Automatic Fire Rules in Call of Cthulhu | Jan 2024 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Automatic Weapons in Call of Cthulhu | 4-13 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Automobile Chase Rules | 127-128 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Automobile Chases | | Keeper's Kit | CHA5110 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Automobile Chases | 164-165 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Automoton | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Autophagia | | Autophagia | FXC-03 | 2019 | Stygian Fox | Call of Cthulhu (Classic) | New York; 1920s; Shoggoth |
| Autopsy | | Autopsy | | 2010 | Three Fourteen Games | Call of Cthulhu (Classic) | |
| Autopsy | 4-21 | Autopsy | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; 1921; Ghoul |
| Autopsy Department | | Cthulhu Maps - Autopsy Department | 098 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Autotroph Shoggoths | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Autumn King | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Autumn Whispers and Winter Callings | | Autumn Whispers and Winter Callings | | 2017 | Self Published | Call of Cthulhu (Classic) | |
| Avian Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Aviation | 35-36 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Ayi' Serpent Goddess of Mesoamerica | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Aylesbury Pike | 7-9 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Aylesbury Pike Phantom | 24-28 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Massachusetts |
| Aztec Troubles | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ba'albek, Great Archaeological Sites: The Truth by Professor Simon Davreu | 42-43 | Dagon | 17 | Apr 1987 | Self Published | Call of Cthulhu (Classic) | |
| Babysitter Wanted: No Experience Necessary | 15 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Greece |
| Back to School | 4-30 | A Time to Harvest Episode 2 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Arkham; Summer; 1930 |
| Back to School | 113-150 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Summer; 1930 |
| Background Options | 300-307 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Bad Day at Hanging Rock | | Bad Day at Hanging Rock | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Australia |
| Bad Dog | Jun 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bad Dreams in an Old House | | George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Bad Moon Rising | 100-138 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | England; 1927; Great Race of Yith |
| The Bad Penny | 6 | Serendipity's Circle | 2 | Mar 1995 | Self Published | Call of Cthulhu (Classic) | |
| The Bad Penny | 3 | Serendipity's Circle | S1 | 1995 | Self Published | Call of Cthulhu (Classic) | |
| A Bad Read | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Bad Sleep | 9-12 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Bad Tidings | | Bad Tidings | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | Portugal; 1937 |
| Bad Trip | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Baggage Check | 21-28 | The Unbound Book | 1 | Oct 2003 | Unbound Publishing | Call of Cthulhu (Classic) | Fire Vampire |
| Bait and Switch: Something Bovine This Way Comes | Jul 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Balance of Power | 143-159 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933 |
| Balancing Sanity Loss In Campaigns | | Chaosium Digest | v36n11 | Nov 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Ballad of Jon Tomes | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ballad of Thirteen Deaths | | The Ballad of Thirteen Deaths | | Nov 2020 | Chaosium | Call of Cthulhu (Classic) | Star Vampire |
| Band of Gold | 42-43 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Band of Gold | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Band of Gold | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| A Banker's Folly | 2-14 | A Banker's Folly | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1924 |
| Bannik - Labyrinth Lord | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bargain Hunting | 39 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Barratt's Brain | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Barrow Virus | 1 | Tuesday Terribles | 7 | Oct 2007 | Chaosium | Call of Cthulhu (Classic) | Alaska |
| The Bartholemew Highpoint School for the Deaf | 18 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Basics of Being a Keeper | | Chaosium Digest | v35n12 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Baskwood Island Hotel | | The Baskwood Island Hotel | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | England; August; 1928 |
| Bast and the Children of the Sphinx | 99 | Ye Booke of Tentacles | 2 | 1999 | The Chaos Society | Call of Cthulhu (Classic) | |
| Bast and the Children of the Sphinx | | Chaosium Digest | v26n10 | Nov 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Bayou Country | 47-57 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Bayou Country | 47-57 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Bayou Ritual | 68-70 | Challenge | 48 | Feb 1991 | Games Designers Workshop | Call of Cthulhu (Classic) | Louisiana; Shoggoth; Hunting Horror |
| Bbokithi | Jul 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Be Afraid, Be Very Afraid | 12-14 | White Dwarf | 89 | May 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| Be Good Neighbours | | Be Good Neighbours | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1933 |
| Be My Valentine | 3-52 | Be My Valentine | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | England; February; 1920 |
| Be My Valentine | | Albion's Ruin Vol 1 | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | England; February; 1920 |
| Bearer Bonds | | 100 Roaring 20's Treasures Vol 1: Bearer Bonds | D10D-G015 | 2021 | D10 Dimensions | Call of Cthulhu (Classic) | |
| The Bearers of the Mark | 43 | White Dwarf | 64 | Apr 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| The Beast in the Abbey | 48-61 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Beast in the Abbey | 52-54 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Beast in the Black | | George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) | |
| Beast in the Cave | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Beast of Averoigne | Jul 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Beast of Lake Champlain | 47-69 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| Beast of Land Between the Lakes | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Beast That Crawls | | The Beast That Crawls | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Louisiana |
| Beasts | 185-201 | Malleus Monstrorum Volume 1: Monsters of the Mythos | CHA23168 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts | A:185-201 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | B:26-30 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | 117-121 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | 178-186 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | 202-211 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | C:26-30 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts and Monsters | 128-137 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts of England, Beasts of Ireland: The Mythos in the UK | 94-106 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Beasts, Monsters | 127-133 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Becoming an Investigator | 15-68 | The 1920s Investigator's Companion | CHA2370 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Bedlam | 93-120 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; December; 1925 |
| A Beginning Scenario for a Campaign | A:90-92 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1920s |
| A Beginning Scenario for a Campaign | 184-186 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1920s |
| A Beginning Scenario for a Campaign | B:90 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1920s |
| Behind the Fan | 379-387 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Behind the Fan | 491-501 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Behold the Mother | 43-68 | Dead Reckonings | CHA2373 | 1998 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928; April; Outer God |
| Belfast | 62-65 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Belgian Congo | 33-46 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Belgian Congo | 152-183 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1930s; Serpentman |
| The Believers of Red Hook | 105-111 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | |
| Bellevue | 96-101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Beloved Dead | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Beltaine and the Beast | | Beltaine and the Beast | | 2016 | Self Published | Call of Cthulhu (Classic) | England; Shub-Niggurath |
| Beneath Dark Stars | 18 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| The Benighted | 29-56 | The Thing at the Threshold | CHA2339 | 1992 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1927 |
| Berlin Black | 119-140 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | Germany; 1945 |
| BESM2 rules for Call of Cthulhu | | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic), Big Eyes Small Mouth | |
| Best Left Buried | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Best People Usually Are | 113-115 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Best-selling Necktie | 2002 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Bestiary | 102-130 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Bestiary | 118-137 | Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) | |
| The Bet | | The Bet | | 2001 | Self Published | Call of Cthulhu (Classic) | |
| Bethlem | 73-80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Better the deVille You Know | | Black Mole | 5 | 1991 | Self Published | Call of Cthulhu (Classic) | |
| The Better to Type With, My Dear | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Beyond the Edge of Darkness | 1-31 | Beyond the Edge of Darkness | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; Autumn; 1923 |
| Beyond the Edges | 135-174 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | San Francisco; Lesser Race |
| Beyond the Façade | 63 | The Adventurer | 3 | Aug 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Beyond the Mountains of Madness | | Cthulhu Maps - Beyond the Mountains of Madness | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Beyond the Mountains of Madness Handouts | | BTMOM Game Aids | CHA0337 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Beyond the Stars | 3-19 | Beyond the Stars | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1930s; 1940s; Hastur |
| Beyond the Threshold | 80-101 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Beyond the Veil | 167-185 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Dungeons and Dragons, Call of Cthulhu (Classic), Pathfinder | Pennsylvania; 1920s |
| The Bibliophile | | Chaosium Digest | v16n03 | Sep 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Bibliophile | 36-37 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Bibliophile | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bibliophilia | 4-17 | Bibliophobia | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Bibliophobia | 38-46 | Tabletop Gaming | 48 | Nov 2020 | Warners Group Publications | Call of Cthulhu (Classic) | |
| The Biblioporium | 11-19 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| The Big Game Hunter | 26-? | Polyhedron | 144 | Oct 2000 | TSR | Call of Cthulhu (Classic) | |
| The Big Picture of the Campaign | 5-21 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Big Score | 95-118 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | Chicago; 1934 |
| Bigfoot | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Billy and the World All Topsy-Turvy | 33-34 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Classic) | |
| Biographies | 5-8 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Biographies | B:5-7 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Biographies | 99-101 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Biographies | C:5-7 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Biographies | 152-154 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Birthday Presence | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Bits and Pieces | 37-62 | No Time To Scream | CHA23185 | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1927 |
| Bitter Shadows | 35-48 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Bitter Venom of the Gods | 48-75 | Bumps in the Night | PAG1014 | 2012 | Pagan Publishing | Call of Cthulhu (Classic) | Virginia; July; 1922; Non-Mythos |
| Black Anna's Bower | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Black Anna's Bower | 22 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| Black Anna's Bower | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Black as Coal | 25-29 | Breakout! | 27 | Jun 1987 | Conflict Simulations of Australia | Call of Cthulhu (Classic) | North Dakota; 1924 |
| Black as Pitch at Midnight | 75-90 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Trinidad and Tobago |
| Black Bargain | 169-184 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Black Blood of the Earth | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | California; October; 1925; Shoggoth |
| The Black Book and the Hunters | 16-18 | Dragon | 138 | Oct 1988 | TSR | Call of Cthulhu (Classic) | |
| The Black Book of the East | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| The Black Book of the East | 14-15 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London |
| The Black Book of the East | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| The Black Book of the East | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | London |
| Black Cat of the Deep | 111-129 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Black Cod Island | 4-49 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Black Devil Mountain | 26-37 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | Maine; February; 1920s; Chthonian |
| Black Devil Mountain | 25-35 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Maine; February; 1920s; Chthonian |
| The Black Dog | 4-20 | The Unbound Book | 1 | Oct 2003 | Unbound Publishing | Call of Cthulhu (Classic) | England; 1920s; Hound of Tindalos |
| The Black Dog | 1 | A Green, Unplesant Land | | 2016 | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| Black Eyed Children | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Black Goat of New Orleans | | Black Goat of New Orleans | GGP | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans; November; 1920s |
| Black Hills, Blackest Secrets | 25-33 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | South Dakota; 1928 |
| The Black Pyramid | 3-16 | The Black Pyramid | | May 2024 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1920s; Nyarlathotep |
| The Black Rat | 268-282 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1933; December |
| The Black Stone | | Chaosium Digest | v03n04 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Black Stone | | The Black Stone | | 1999 | Self Published | Call of Cthulhu (Classic) | Maine; 1990s |
| Black Sun Rising | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| Black Sunday | 63-65, 67-73 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | Oklahoma; May; 1935 |
| Black Sunday | 65-75 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | Oklahoma; May; 1935 |
| The Black Tree of Cold Springs | | The Black Tree of Cold Springs | | May 2021 | Chaosium | Call of Cthulhu (Classic) | Oklahoma; August; 1934 |
| Black Water, White Death | 257-288 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | Australia; 1926; Autumn; Gnoph-Keh |
| Black Winged Ones | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Black Ziggurat, Part One | | Chaosium Digest | v23n06 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1920s; Outer God |
| The Black Ziggurat, Part Two | | Chaosium Digest | v23n07 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1920s; Outer God |
| The Blackbird | Jul 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Canada |
| The Blackness Beneath | 169-176 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1920s |
| Blackthorn Bridge Club | 6-37 | Blackthorn Bridge Club | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | New York; 1923 |
| Blackwater Creek | 5-55 | Keeper Screen Pack | CHA23137 | 2015 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; September; 1926; Dark Young of Shub-Niggurath |
| Blackwater Creek | | Missed Dues | CHA0419 | 2013 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; September; 1926; Dark Young of Shub-Niggurath |
| Blackwater Creek | | Missed Dues and Other Adventures | | 2013 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; September; 1926; Dark Young of Shub-Niggurath |
| Blackwell Horror | 29-49 | The Unbound Book | 1 | Oct 2003 | Unbound Publishing | Call of Cthulhu (Classic) | Maine |
| Blame It On Cthulhu: Creating Plots for Call of Cthulhu | 10-13 | Different Worlds | 35 | Jul 1984 | Chaosium | Call of Cthulhu (Classic) | |
| The Blanford Horror | 19-27 | The Whisperer | 1 | Sum 1999 | Severn Valley Press | Call of Cthulhu (Classic) | England; 1926 |
| Blank | 1-2 | Blank | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; December; 1924 |
| Blasphemous Covens | 20-23 | Australian Realms | 30 | Nov 1996 | Australian Realms | Call of Cthulhu (Classic) | |
| Bleak October | | Bleak October | | 2017 | Alter Ego Software | Call of Cthulhu (Classic) | 1929 |
| Bleak Prospect | 110-141 | Nameless Horrors | CHA23133 | 2015 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1932 |
| Bleak Prospect | 105-136 | Nameless Horrors | CHA23180 | 2023 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1932 |
| Bleak Relay | 10-11 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Bleakmoore Cemetery | B:1-9 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; Summer; 1922 |
| The Bleeding Stone of Iphtah | 18-21 | White Dwarf | 60 | Dec 1984 | Games Workshop | Call of Cthulhu (Classic) | Israel; Great Race of Yith |
| Bless the Beasts and Children | 36-51 | Adventures in Arkham Country | CHA2342 | 1993 | Chaosium | Call of Cthulhu (Classic) | Arkham; Deep One |
| Blessed of Hydra | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Blessed Seers | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Blind Date | 4-18 | Blind Date | | Apr 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; February; 1921 |
| Blistering Maw - Spawn of Nyarlathotep | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Blood and Guts | 9-11 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Blood and Guts in High School | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Blood and the Deep Blue Sea | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Blood and Water | 60-74 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1923; Ghoul; Deep One |
| Blood Fruit | 84-100 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | Ireland; April; 1924; Yig |
| Blood Fruit | 178-200 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Ireland; April; 1924; Yig |
| The Blood Map | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Blood of the Moon | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Blood on the Chocolate | | Blood on the Chocolate | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | 1930s |
| Blood on the Tracks | 74-87 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | 1920s; Glaaki |
| Blood on the Tracks | 68-79 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | 1920s; Glaaki |
| Blood on the Tracks | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Massachusetts |
| Blood! | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bloodbath at 20,000 Feet | 106-187 | Beach Blanket Bloodbath | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | 1930s |
| Bloodbath at 30 Fathoms | 65-105 | Beach Blanket Bloodbath | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1920s |
| Bloodbath on the Far Side of Infinity | 288-360 | Beach Blanket Bloodbath | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1920s |
| The Blooded Mirror | | Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Classic) | |
| Bloodlines | 57-74 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| Bloody Botany | 407-416 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| Bloody Botany | 532-542 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| Bloody Mary | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bloody Red Tape | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Bloody Viscount's Return | | The Bloody Viscount's Return | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Austria; October; 1924 |
| Blow Out the Candles | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | New England; 1925 |
| Blown Glass | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Blown Glass | 1996 | gwthomas.org | | | Self Published | Call of Cthulhu (Classic) | |
| The Blue Mermaid Ocean Liner | | Cthulhu Maps - The Blue Mermaid Ocean Liner | 030 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Blue Train, Black Night | D:181-200 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Europe; 1923 |
| Blue Train, Black Night | D:85-114 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Europe; 1923 |
| Blue Train, Black Night | B:265-288 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Europe; 1923 |
| Boarding At Midnight | 38-42 | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| The Boarding House at Arkham Street | | The Boarding House at Arkham Street | 2001b | 2010 | Three Fourteen Games | Call of Cthulhu (Classic) | 1930s |
| The Body on the Beach | 28-30 | Dagon | 15 | Nov 1986 | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| The Bog | 58-72 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| The Bog | | The Bog | | 1999 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| The Bog | 39-52 | Opifex Bimonthly | 21 | Sep 1999 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| The Bogey-Owl | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Boggle Hole Asylum | 61-79 | The Legacy of Lombard House | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | England; November; 1925 |
| Boitata / Vengeful Fire Serpent | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bolivia | 18-43 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Bolivia; March; 1933; Serpentman; Formless Spawn of Tsathoggua |
| The Bonded Pair | 1 | The Bonded Pair | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Bone Cruncher | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Bone Demons | Mar 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bonefield Hounds | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bonefire | | Bonefire | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | Minnesota; 1925 |
| Bones of Contention | 92-108 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | Kingsport |
| Bonescraw | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Boods | 40 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Book | 72-75 | Challenge | 72 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) | Greece |
| The Book | 1997 | Ubar | | | Self Published | Call of Cthulhu (Classic) | |
| Book Lurkers | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Book of Characters | 1-84 | The Mana Bros | | | Self Published | Call of Cthulhu (Classic) | |
| The Book of Drad | | Chaosium Digest | v16n09 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Book of Eibon | | Dagon | 4 | Oct 1984 | Self Published | Call of Cthulhu (Classic) | |
| The Book of Eve | | The Book of Eve | | May 2025 | Chaosium | Call of Cthulhu (Classic) | 1918 |
| The Book of Nefrekeptah | 44-52 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| The Book of Random Tables: Eldritch | | The Book of Random Tables: Eldritch | | Apr 2023 | dicegeeks | Call of Cthulhu (Classic) | |
| The Book of Sand | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Book of Terrible Knowledge | G:1-28 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; 1922; Summer |
| The Book of Untold Sins | 8-11 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Book Plates | | Book Plates | CHA23135-Bookplates | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Book Puzzles, Cypher Wheels and Other Library Secrets | 31-41 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Bookmarks | | Book Marks | CHA23135-Bookmarks | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Books and Sanity: Alternate Rules | 204-205 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| The Books of Jackson Elias | 58-59 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Books of Jackson Elias | 67-69 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Books of the Cthulhu Mythos | 14-24 | Dagon | 21 | Mar 1988 | Self Published | Call of Cthulhu (Classic) | |
| The Books of Uncle Silas | | Chaosium Digest | v31n06-07 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Star Vampire |
| The Books of Uncle Silas | 135-151 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Star Vampire |
| The Books of Uncle Silas | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Arkham; 1920s; Star Vampire |
| Books to Study | | Chaosium Digest | v11n07 | Aug 1995 | Chaosium | Call of Cthulhu (Classic) | |
| A Bookstore of the Occult | | Cthulhu Maps - A Bookstore of the Occult | 063 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Boom or Bust | | Boom or Bust | | Dec 2019 | Dark Trapezohedron Productions | Call of Cthulhu (Classic) | |
| Bootleg Whiskey, Liquor, Champagne and Wine | | Bootleg Whiskey, Liquor, Champagne and Wine | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; Colour Out of Space |
| Bootleg Whiskey, Liquor, Champagne and Wine | 23-44 | American Empire | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Boston; 1926; Colour Out of Space |
| Border Town | | Border Town | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Born of the Winds | 102-144 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Borne Into Darkness | 80-99 | Tales of Death & Darkness | CHA0321 | 2005 | Chaosium | Call of Cthulhu (Classic) | New Hampshire |
| The Boss: A Tale of Dark, Distilled Secrets in a Bottle | | The Boss | | Dec 2019 | Dark Trapezohedron Productions | Call of Cthulhu (Classic) | 1924 |
| Boston | 12-26 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Boston | 42-50 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | Boston; 1920s |
| The Boston Beast | | Runestone | 6 | 1985 | Self Published | Call of Cthulhu (Classic) | Boston |
| The Bosworth House | 43-61 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Arkham; January; 1928 |
| A Botanical Garden | | Cthulhu Maps - A Botanical Garden | 090 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| A Botanical Visit | 6-7 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| The Bottle Episode | | The Bottle Episode | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1929 |
| Bottoms Up! | | Bottoms Up! | cr6204 | 2020 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham |
| Boudica's Legacy | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bound Destroyer | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bound for Home | 179-197 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
 Bouts of Madness | | Bouts of Madness Deck | | Jan 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Box of Evil | 88-111 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| The Box of G'Hyr | 34-35 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Box of G'Hyr | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Box of Sathla | 87-101 | Bayt al Azif | 4 | Jan 2022 | Bayt al Azif Inc | Call of Cthulhu (Classic), Trail of Cthulhu | Boston; 1920s |
| A Boxing Club | | Cthulhu Maps - A Boxing Club | 084 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| A Boy's Corpse | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Bread of Heaven | Apr 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Utah; Shoggoth |
| Bread or Stone | C:131-164 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Croatia; 1923 |
| Bread or Stone | B:109-136 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Croatia; 1923 |
| Breaking New Grounds | May 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Boston |
| A Breath of Cold Air | | Chaosium Digest | v04n08 | Oct 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Breeding Ground | 1-26 | End of the World | 0005 | 1994 | Triad Entertainments | Call of Cthulhu (Classic) | Georgia state; Spring; 1922; Dark Young of Shub-Niggurath |
| The Brick | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Brick Cylinders of Kadatheron | 101 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Bride of Pendle | 8-66 | The Bride of Pendle | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | England; Autumn; 1922 |
| The Bride of the Goat | 5-40 | The Bride of the Goat | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Japan; 1920s |
| Bride of the Wilds | | Bride of the Wilds | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Georgia state; June; 1932 |
| Bridge over Troubled Water | | Cthulhu Maps - Bridge over Troubled Water | 081 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| A Bridge to the Village | | Cthulhu Maps - A Bridge to the Village | 072 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| A Brief Conversion System | 314-315 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| A Brief History of Arkham | 13-16 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| A Brief History of Modern Ireland | 13-17 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Brimstone at the Club of the Black Arts | | Dagon | 4 | Oct 1984 | Self Published | Call of Cthulhu (Classic) | Innsmouth; Hastur |
| Bringing Mythos London to Life | B:10-19 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Britain in the Mythos | 33-34 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Britain's Own Miskatonic Valley | | Valkyrie | 28 | 2003 | Partizan Press | Call of Cthulhu (Classic) | |
| British Gun Laws from the 19th Centurt to the Present | | Dagon | 3 | Aug 1984 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| The British Museum | 7-29 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | London; October; 1925 |
| The Brockford House | A:85-89 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | Maine; Deep One |
| The Brockford House | 88-92 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Maine; Deep One |
| The Brockford House | B:78-82 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | Maine; Deep One |
| The Brockford House | 95-99 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Broken Dreams | 3-11 | Broken Dreams | | Oct 2023 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Dreamlands) | Dreamlands; Kingsport; 1920s |
| The Broken Mirror | Sep 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Broken Spines: M R James | 58-59 | The Last Province | 3 | 1993 | Last Province Publishing | Call of Cthulhu (Classic) | |
| The Brood of Bubastis | 72-84 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Brood of the Beetle | 78-122 | Worlds of Cthulhu | 6 | Jan 2009 | Pegasus Press | Call of Cthulhu (Classic) | Boston; 1920s |
| The Brooding City | 523-537 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Brother of Jesus | | The Sassoon Files: The Brother of Jesus | SOS-HORROR1B | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | China; 1929; June |
| The Brotherhood | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Brothers of the Yellow Sign | 126-135 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | Italy; 1929; December |
| Bubbles | May 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Budapest | 16-20 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Budapest and its Surrounds | 69-85 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | Hungary; October; 1925 |
| The Buddha Cave | | Cthulhu Maps - The Buddha Cave | 058 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Bugg-Shash, the Terrible | | Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) | |
| Bugg-Shash, the Terrible | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | |
| Building a Better Cult Part 1 | | Chaosium Digest | v16n09 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Building a Better Cult Part 2 | | Chaosium Digest | v16n10 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Building a Better Witch | 27-32 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Building a Mythos Tome | 1999 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Building an Elder Sign | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Building an Investigator | 3-8 | Trail of Cthulhu Condensed Rules | | | Pelgrane Press | Call of Cthulhu (Classic) | |
| Bulding a Fake Stone Wall | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Bullbeggar | 108-109 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1920s; Star Vampire |
| Bump in the Night | | Chaosium Digest | v26n07 | Aug 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Bump in the Night | 1998 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Bunnyman | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bureaucratic Encounter Tables | 141-144 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Burn Flesh Makeup | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Burning Revenant | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Burning Stars | 127-170 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | Haiti; 1930; Nyarlathotep |
| The Burning Stars Maps | | Maps for Burning Stars | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Burning Within | 182-192 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | London; 1925 |
| The Burning Within | 199-207 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | London; 1925 |
| Burnout | 10-11 | Vortext | 8 | Spr 1993 | Vortex Publishing | Call of Cthulhu (Classic) | |
| The Burrower Beneath | 191-198 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Burrowers Beneath | | Tradetalk | 13 | 2004 | The Chaos Society | Call of Cthulhu (Classic) | |
| The Burry Man | | The Burry Man | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | Scotland; Summer; 1923 |
| Burton's Motel | 1-19 | Burton's Motel | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; April; 1923 |
| The Bus Survivor | Jan 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Bus Trouble | | Cthulhu Maps - Bus Trouble | 070 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Busilak | | Busilak | | Apr 2019 | Chaosium | Call of Cthulhu (Classic) | Philippines |
| The Butcher | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Butcher of Queen Vic Market | | The Butcher of Queen Vic Market | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Australia; 1920s |
| Butter Knife | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Buzzing | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| By the Bay, Part I | 47-54 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | San Francisco; 1929; August |
| By the Bay, Part I | 67-74 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | San Francisco; August; 1929 |
| By the Bay, Part II | 55-60 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | San Francisco; 1929; August |
| By the Bay, Part II | 75-80 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | San Francisco; August; 1929 |
| By the Bay, Part One | 98-106 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | San Francisco; August; 1929 |
| By the Bay, Part Two | 107-113 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | San Francisco; August; 1929 |
| By the Skin of the Teeth | D:158-180 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Turkey; 1923 |
| By the Skin of the Teeth | D:39-84 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Turkey; 1923 |
| By the Skin of the Teeth | B:225-264 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Turkey; 1923 |
| The Cabin in the Woods | | The Cabin in the Woods | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | 1920s; Chthonian |
| Cafe au Morte | | Cafe au Morte | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Boston; 1928 |
| Cages of Light and Lenses | 3-19 | Cages of Light and Lenses | | Feb 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Cains Clan | 19-29 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Classic) | Wisconsin; Halloween |
| The Cairbh Gorge | Jul 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Ireland |
| Cairo | 72-108 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1925 |
| Cairo | 80-120 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1925 |
| Cairo | C:1-31 | Masks of Nyarlathotep | CHA2307-X | 1984 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1925 |
| Cairo | 55-85 | Masks of Nyarlathotep | CHA3304 | 1989 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1925 |
| Cairo Museum of Antiquities | 85-90 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | Egypt; October; 1925 |
| Calcutta | 184-205 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | India; 1930s; Lloigor; Serpentman |
| Calendrics of the Mesoamerican Languages | 64-67 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | 7-20 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | 8-22 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu | 36-? | Breakout! | 42 | Mar 1991 | Conflict Simulations of Australia | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | 8-23 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | 8-23 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | 8-23 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Call of Cthulhu | | H.P. Lovecraft's "The Call of Cthulhu" for Beginning Readers | CHA5115 | 2016 | Chaosium | Call of Cthulhu (Classic), None | |
| Call of Cthulhu 7th Edition Conversion Guidelines | | Call of Cthulhu 7th Edition Conversion Guidelines | CHA20135-CONV | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Colorung Book | | Call of Cthulhu: The Coloring Book | CHA5116 | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Designers' Notes | 8-13 | Different Worlds | 19 | Feb 1982 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Dice Tray | | Call of Cthulhu Dice Tray | KCGTRAYCTH | 2018 | King of the Castle Games | Call of Cthulhu (Classic) | |
| Call of Cthulhu Difficulty Modifiers | 31-35 | RPG Review | 18 | Dec 2012 | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Errata and Second Thoughts | 23 | Different Worlds | 19 | Feb 1982 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Fate Hack | 11-13 | Protodimension | 21 | Aut 2014 | Kinstaff Media | Call of Cthulhu (Classic), Fate of Cthulhu | |
| Call of Cthulhu House Rules | 36-38 | RPG Review | 18 | Dec 2012 | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu House Rules | | Chaosium Digest | v32n11 | Dec 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Live Rules | | Chaosium Digest | v11n02 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Name Card | Jun 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Prop: Fortune Cookie | Jun 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Questions Answered | 3-4 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Road Tiles | Aug 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Single Player Scenarios | May 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Skills Training | | Chaosium Digest | v11n07 | Aug 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu Survival Tips | Jan 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Survival Tips | 1-2 | Call of Cthulhu Survival Tips | | 2002 | Self Published | Call of Cthulhu (Classic) | |
| Call of Cthulhu Vehicle Building Rules | | Chaosium Digest | v32n11 | Dec 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Call of Cthulhu-Nephilim Time Travel | 42-44 | RPG Review | 43 | Jun 2019 | Self Published | Nephilim, Call of Cthulhu (Classic) | |
| Call of Cthulhu: Miskatonic University | 11 | Game Trade Magazine | 135 | May 2011 | Alliance Game Distributors | Call of Cthulhu (Classic) | |
| Call of Duty | 76-97 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Rhode Island; 1925 |
| Call of Duty | | Call of Duty | | 2008 | Arclight | Call of Cthulhu (Classic) | Rhode Island; 1925 |
| Call of Khalk'ru | 8-10 | Abyss | 19 | Jun 1982 | Ragnarok Games | Call of Cthulhu (Classic) | |
| Call of Poolthulhu | | Call of Poolthulhu | | Jul 2018 | Passe Gaming | Call of Cthulhu (Classic) | Massachusetts; 1920 |
| The Call of the Fang | 65-72 | Bayt al Azif | 5 | May 2023 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Call of the Sea | | Call of the Sea | | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1933 |
| Caller in the Desert | 29-36 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | Egypt |
| The Calling | 62-72 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Calling the King | | Curse of the Yellow Sign | | 2015 | John Wick Presents | Call of Cthulhu (Classic) | Colorado; December; 1999 |
| Calling the King | | Curse of the Yellow Sign Act 2: Calling the King | 2 | 2009 | Wicked Dead Brewing | Call of Cthulhu (Classic) | Colorado; December; 1999 |
| The Camden Project | 103-119 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | New Jersey; 1929 |
| Camden's Dark Twin | 127-136 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | New York State; 1929 |
| A Camp in Antarctica | | Cthulhu Maps - A Camp in Antarctica | 003 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Campaign | A:14-24 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| The Campaign | A:41-58 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Campaign | A:35-60 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Campaign Background | 5-18 | A Time to Harvest Episode 1 | | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Campaign Background | 11-36 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Campaign Background: The Ultimate Conspiracy Theory HO HO HO (The Truth Behind Santa Claus) | | Chaosium Digest | v29n07 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Campaign Beginning | 91-98 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | January; 1925 |
| Campaign Overview | 9-28 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Campaigning | 33-49 | Lands of Mystery | Hero 20 | 1985 | Hero Games | Call of Cthulhu (Classic), Justice Inc, Daredevils, Chill | |
| Campaigns | 153-181 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| The Campbell House and Surroundings | 16-24 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| The Camping Trip | | The Camping Trip | | Sep 2018 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; July; 1928 |
| Can I Touch the Angel Mummy? | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Can I Touch the Angel Mummy? | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cancelled Innsmouth Books | 62-64 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Candle Keep | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Canis Mysterium | 5-30 | Canis Mysterium | CHA23124 | 2013 | Chaosium | Call of Cthulhu (Classic) | Arkham; October; 1930 |
| Canned Articles | 82-115 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s; October; Mi-Go |
| Cannibal Express | 18-27 | White Wolf | 18 | Dec 1988 | White Wolf Games | Call of Cthulhu (Classic) | Boston; 1926 |
| The Cannibals Attack | 79-88 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| The Canopic Jar | 5 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Captains of Industry | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Captive Audience | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cardington | 64-69 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; 1929; July |
| The Cardiss Tapes | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cards From the Smoke | | Cards from the Smoke | CB7357 | 2017 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Cards of Fate | 75-76 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Care Forgot | | Care Forgot | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1920s |
| Carkers | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Carnival Knowledge | 101-111 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | Summer; 1980s; Psycopath |
| The Carpet | 14 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Carpet | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Carpet | 1994 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Carrion-Kind | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Cars That Ate Sanity | 50 | White Dwarf | 77 | May 1986 | Games Workshop | Call of Cthulhu (Classic) | |
| Caryatid / Enchanted Guardian Statue | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Casablanca | 30-39 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Casablanca | 31-41 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Case | 7-14 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Providence; 1928 |
| The Case of Bernard Brown | | The Case of Bernard Brown | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Case of Colonel Fawcett | 6-9 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 19-20 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 9-10 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 30-32 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 47-48 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 21-22 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 6-7 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Mark Edward Morrison | 9-11 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Case of Rodolfo Amedeo Pelvoux | 1997 | The Mana Bros | | | Self Published | Call of Cthulhu (Classic) | |
| The Case of the Cat's Cradle | 469-488 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | Egypt; 1925 |
| The Case of the Cat's Cradle | 599-620 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | Egypt; 1925 |
| The Case of the Marauding Mummy | 178-179 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| The Case of the Missing Manhole Covers | 22 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Arkham |
| The Case of Titus Crow | | Chaosium Digest | v03n06 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Cassandra | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Casting for Characters | | Chaosium Digest | v04n12 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Castle Dark | 19-29 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Romania; 1929 |
| Castle Dark | 60-70 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Romania; 1929 |
| Castle Dark | 39-49 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Romania; 1929 |
| The Castle in the Window | 73-80 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Castle in the Window | 106-118 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Castle of Greed | 1-19 | The Castle of Greed | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Kansas; 1933 |
| Casual Meeting | May 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cat Song | | Chaosium Digest | v29n06 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | December; Bast |
| Cat's Claw, Part 1 | | Chaosium Digest | v30n11 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) | Bast |
| Cat's Claw, Part 2 | | Chaosium Digest | v30n12 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) | Bast |
| Cat's Cradle | | Chaosium Digest | v28n08 | Aug 1999 | Chaosium | Call of Cthulhu (Classic) | Bast |
| Cat's Cradle | 8-33 | Cat's Cradle | | Jun 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920s |
| Cat's Eyes | | Chaosium Digest | v28n10 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) | Bast |
| Cat's Paw | 90 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Catcott Collection | | The Catcott Collection | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | England; November; 1923 |
| Catland | 147-174 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; May; 1926 |
| Cats | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Cats of Lamu | 121-169 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | Kenya; Dreamlands |
| Cauchemar | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Caught! | May 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | |
| Cave Beast | 13-14 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Classic) | |
| Celestia Marie | 39-48 | Fictional Reality | 9 | Sep 2002 | Self Published | Call of Cthulhu (Classic) | |
| Celluloid Train Terrors | A:66-67 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| A Cemetery in the Fog | | Cthulhu Maps - A Cemetery in the Fog | 011 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Chant of Auld Lang's Syne | | The Chant of Auld Lang's Syne | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | December |
| The Chapel of Contemplation | 22-31 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| The Chapel of Contemplation | 24-33 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Chapels and Shrines | 39-43 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Chapochaug Tunnel Haunting | 29-41 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Massachusetts |
| The Character | 8-36 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| The Character | 10-26 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Character Creation | 61-72 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Character Creation | 1-46 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Character Creation | 8-9 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Character Generation | 6-15 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Character Scenes | 34-41 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | London; 1927 |
| Characters | 9-14 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Characters in Masks of Nyarlathotep | 622-690 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Characters in Masks of Nyarlathotep | 490-554 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Characters: Reflecting the Dark Mirror | 4-11 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Charles Fort | 14-15 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Charles Fort's X and Y | 16-18 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Charnel House | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Charnelhouse | 122-139 | The Realm of Shadows | PAG1006 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Dreamlands; 1940s; Ghoul |
| Charts, Maps and Globes | 17-23 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Chases | 132-150 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Chases | 132-150 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Chases in Call of Cthulhu | | Chaosium Digest | v22n04 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Chateau of Blood | 23-37 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | Europe; Werewolf |
| Cheating Madness | 24-27 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Cheating Madness | 106-109 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Chelsea Hotel | | Cthulhu Maps - The Chelsea Hotel | 052 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Chicken Merry Hawk Deh Near | 1-17 | Chicken Merry Hawk Deh Near | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Jamaica |
| Children of Chaac | | Children of Chaac | | Jun 2021 | Type40 | Call of Cthulhu (Classic) | Mexico |
| The Children of Gaia | 30 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Children of the Night | 60-63 | The Adventurer | 5 | Dec 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Children of the Night | | Chaosium Digest | v29n10 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Children of the Web | 4-11 | Children of the Web | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1920s; Atlach-Nacha |
| Children of the Yellow Lake | | Nightscapes | 8 | Jul 1998 | Self Published | Call of Cthulhu (Classic) | Brazil; 1922 |
| The Children of Yig | | Starry Wisdom | 3 | Sum 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Children's Room | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Chill in Abashiri | 4-20 | A Chill in Abashiri | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Japan; 1922 |
| Chimera's Womb | 41 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| China | 519-618 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | China; 1925 |
| China Clipper | 5-45 | China Clipper | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| China Dolls: Children of Madam Yi | 9 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Chinaman's Screen | 9 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Chinaman's Screen | 11 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Chinatown | 49-59 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Chinese Secret Societies | 6-7 | Different Worlds | 40 | Jul 1985 | Chaosium | Call of Cthulhu (Classic) | |
| A Chip off the Old Blob | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Chirihoi | 98-102 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Japan; 1929 |
| Chiroptera | Sep 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Chocolate Factory | | The Chocolate Factory | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1926 |
| Choosing Statistics in CoC | | Chaosium Digest | v06n09 | May 1994 | Chaosium | Call of Cthulhu (Classic) | |
| The Chosen of Eihort | 53-55 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Chosen of Yig | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Christmas at the Sanatorium | 1-20 | Christmas at the Sanatorium | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | England; December; 1920s |
| Christmas in Kingsport | 42-56 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1920s; December |
| Christmas in Kingsport | 49-90 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Kingsport; December; 1920s |
| Christmas in Kingsport | | The Lovecraft Country Holiday Collection | GGP | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Kingsport; December; 1920s |
| Christmas in Venice | 28-41 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Classic) | Italy; 1927; December |
| Chronology of the 1920s in Ireland | 18-20 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Chronology of the 20s in Ireland | 11-14 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Chupacabra | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Church of Chiropteran Wisdom | | Church of Chiropteran Wisdom | | Dec 2018 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Church of the Poison Mine | | Serendipity's Circle | 19 | | Self Published | Call of Cthulhu (Classic) | |
| The Church of the Seal | 61-70 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Europe |
| Cinematic Environs: Survival | | Cinematic Environs: Survival | | Jul 2020 | Critical Hit Publishing | Call of Cthulhu (Classic) | |
| Circle of Friends | 20-25 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Cities of the Empire | 218-304 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Citizens of the Empire | 305-311 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The City | 18-48 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The City | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| City Beneath the Sands | 92-124 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | Australia; Flying Polyp; Great Race of Yith |
| City Fear | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| City Guide: Belfast | 90-99 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| City Guide: Cork | 100-110 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| City Guide: Dublin | 78-89 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| City Guide: Galway | 111-118 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The City in the Skull | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| City of Arkham Forms | | City of Arkham Forms | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| The City of Bridgewater | 10-18 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | |
| The City of Decaying Splendor | 29-50 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | China; 1920s |
| The City of the Elder Things | 160-196 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933; Elder Thing; Shoggoth |
| City of the World, Hall of the Muses: Alexandria | 60-63 | Cryptych | 5 | 1994 | ILM International | Call of Cthulhu (Classic) | |
| The City of Tokyo | 58-155 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| A City Police Station | | Cthulhu Maps - A City Police Station | 015 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The City Without a Name | 118-149 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) | Saudi Arabia; 1920s |
| The City Without a Name | 67-85 | Curse of the Chthonians | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic) | Saudi Arabia; 1920s |
| Cityworks | | 50 Locations of the Roaring 20's Vol 1: Cityworks | D10D-G016 | 2021 | D10 Dimensions | Call of Cthulhu (Classic) | |
| Classic Era | | Big A** Book of Hooks | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Classic-era Iceland Sourcebook | 22-42 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Clenched Hand | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Clerical Cosmic Horror | 43-44 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Click Clack | | Click Clack | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | 1920; Halloween |
| The Cliff Dwellers | 4-7 | Different Worlds | 32 | Jan 1984 | Chaosium | Call of Cthulhu (Classic) | |
| A Clip off the Old Blob | 14-18 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Clothes Maketh | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Clubs | 71-72 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Clue Scenes | 26-33 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | London; 1927 |
| Clues of Custists | 78-79 | Bayt al Azif | 4 | Jan 2022 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| The Coast | 107-126 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Cobb's Corner | 19-33 | A Time to Harvest Episode 1 | | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Cobb's Corner | 37-66 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Creation | 6-14 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Errata | 16 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Sanity | 26-30 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Skills | 16-24 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Spells | 46-50 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC 5 1/2 Using Skills | 17-23 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| CoC Adventure Timeline | | Chaosium Digest | v03n01 | Jul 1993 | Chaosium | Call of Cthulhu (Classic) | |
| CoC Investigators | | Chaosium Digest | v01n03 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| CoC NPC Donald McAlister | | The Unnamed | 3 | | Self Published | Call of Cthulhu (Classic) | |
| Cockney Rhyming Slang | 86 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Code | 69-102 | Mansions of Madness Volume 1: Behind Closed Doors | CHA23167 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Codex Corozal | 1 | Tuesday Terribles | 8 | Oct 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Codices and Tomes | 45-63 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Cold Air | 1 | Cold Air | | Feb 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Cold Brood | 3-50 | Cold Brood | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | Australia; 1925 |
| The Cold Case of Robert Suydam | 2-52 | After Lovecraft: The Horror at Red Hook | OWC4005 | 2009 | Super Genius | Call of Cthulhu (Classic) | New York; 1920s |
| Cold Harvest | 5-43 | Cold Harvest | CHA23143 | 2014 | Chaosium | Call of Cthulhu (Classic) | Russia; 1930s |
| Cold Hunger | | Cold Hunger | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Cold Logic | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Cold Plague | | Cold Plague | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Cold Spot | 16-50 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; Spring; 1929 |
| Cold Warning | 3-27 | Cold Warning | GGP1703 | 2017 | Golden Goblin Press | Call of Cthulhu (Classic) | Maine; February; 1927; Ithaqua |
| Cold Wind Blowing | C:105-120 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Cold Wind Blowing | C:81-116 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Cold Wind Blowing | B:67-96 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| A Cold Wind Blows | | A Cold Wind Blows | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Colorado; 1922; June |
| Collecting Dust | 1-19 | Collecting Dust | | 2010 | Self Published | Call of Cthulhu (Classic) | Arkham; 1928 |
| Collection | 1-2 | Collection | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1924; December |
| Colonial Era Houses (1640-1770) | 2-8 | This Old Haunted House | CHA0361 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Colonial Era Houses (1640-1770) | 2-5 | This Old Haunted House, Too | CHA0373 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Colonial Folk Magic | 53-56 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Colour of His Eyes | 121-134 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | San Francisco; Colour Out of Space |
| Combat | 83-88 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Combat | 102-129 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Combat | B:18-20 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Combat | 58-91 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Combat | 102-129 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Combat | B:18-20 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Combat Options | 288-293 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Combined Skill Roles in 7th ed. Call of Cthulhu | Jan 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Come Forth and be Cured | | Come Forth and be Cured | | 2001 | Self Published | Call of Cthulhu (Classic) | |
| Coming of Age | 127-191 | Unseen Masters | CHA2384 | 2001 | Chaosium | Call of Cthulhu (Classic) | New York |
| The Coming of An Age | 1 | The Coming of An Age | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Coming of the White Worm | 96-114 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Commentarius De Bellum Angelicum | 7-8 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Common Courtesy | 106-121 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | California; November; 1920s |
| Communications | 16 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Companies | B:8 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Companies | 102 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Companies | C:8 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Company Town | 131-138 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | Tibet; Mi-Go |
| The Competition | 1999 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Complete Keeper's Revenge Kit | | Chaosium Digest | v20n06 | Jul 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Complete Keeper's Revenge Kit, Part Two | | Chaosium Digest | v22n05 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Complex Core | | Cthulhu Maps - A Complex Core | 112 | May 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Computorising Cthulhu | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| Concerning Magic | 7-10 | The Grand Grimoire of Cthulhu Mythos Magic | CHA23141 | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Concerning Spells | 11-21 | The Grand Grimoire of Cthulhu Mythos Magic | CHA23141 | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Concerning the Forthcoming Inexpensive Paperback Translation of the Necronomicon of Abdul Alhazred | 81-104 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Concerning the Forthcoming Inexpensive Paperback Translation of the Necronomicon of Abdul Alhazred | 119-154 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Condemned | 116-134 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Condemned | 166-188 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Conducting an Investigation | | Chaosium Digest | v30n08 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) | |
| A Conspiracy of Cthulhians | Aug 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Consumption | 42-56 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | Arkham; March |
| The Contemplative Sphinx | 233-234 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Contemporary (1946 and beyond) | 64-88 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Contemporary Ideas about Lovecraft and the Necronomicon | 14-16 | Different Worlds | 44 | Nov 1986 | Chaosium | Call of Cthulhu (Classic) | |
| The Contender: A Love Story | 175-205 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | New York; 1920s |
| The Contender: A Love Story | 153-182 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| A Continent of Horrors | A:59-65 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Convalescence | 2-12 | Convalescence | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Ireland; August; 1922 |
| The Convention | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Conversion System | 43-46 | d20 Call of Cthulhu Gamesmaster's Pack | CHA8801 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Cop Killers | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Corpse Spider | Mar 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Corrupted by the Dark | 44-48 | White Wolf | 48 | Oct 1994 | White Wolf Games | Call of Cthulhu (Classic) | |
| The Corruption of G'Hyr | 1-13 | The Corruption of G'Hyr | | 1997 | Self Published | Call of Cthulhu (Classic) | London; 1928 |
| The Corruption of G'Hyr | | drelb.free.fr | | | Self Published | Call of Cthulhu (Classic) | London; 1928 |
| Cosa Nostra Conflagration | | Cosa Nostra Conflagration | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; April; 1923 |
| A Cosmic Art Gallery | | Cthulhu Maps - A Cosmic Art Gallery | 054 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Cosmic Rationality | | The Blasphemous Tome | 5 | Dec 2019 | Self Published | Call of Cthulhu (Classic) | |
| A Cosmic Temple | | Cthulhu Maps - A Cosmic Temple | 074 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Costs, Equiment and Services | 254-259 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Costs, Equiment and Services | 288-293 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Costume Party | 85-96 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Classic) | Maine; Halloween; 1920s |
| Costume Party | | Costume Party | | Oct 2019 | Chaosium | Call of Cthulhu (Classic) | New England; Halloween; 1930s |
| A Cottage in the Orchard | | Cthulhu Maps - A Cottage in the Orchard | 096 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Couch Potato | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Couch Potato | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Count Magnus Mythos | | Fenix | 2017.1 | 2017 | Askfagein | Call of Cthulhu (Classic) | |
| A Country Airfield | | Cthulhu Maps - A Country Airfield | 002 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| A Country Inn | | Cthulhu Maps - A Country Inn | 086 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Country of the Wind | 233-243 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Country of the Wind | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| A Country Village | | Cthulhu Maps - A Country Village | 014 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Court Proceedings | 63-84 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Courtiers of the Outer Gods | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Cousins Through the Years | 179-180 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Cousins: All Grown Up | 205-218 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Cousins: All Pulped Up | 219-232 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Cousins: Best Friends Forever | 193-204 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Cousins: The Beginning | 181-192 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Coven of Cannich | 18-33 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Scotland; May; 1924; Serpentman; Shoggoth |
| The Coven of Cannich | 40-76 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1924; May; Serpentman; Shoggoth |
| The Coven of Cannich | 18-33 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Scotland; May; 1924; Serpentman; Shoggoth |
| Covenant of Darkness | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Crab Canon | 48-55 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Serpentman |
| The Crack'd and Crook'd Manse | 54-70 | Mansions of Madness | CHA2327 | 1990 | Chaosium | Call of Cthulhu (Classic) | Connecticut; 1925; February |
| The Crack'd and Crook'd Manse | 54-71 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | Connecticut; February; 1925 |
| The Crack'd and Crook'd Manse | 17-24 | Multiverse | 3 | Sum 1984 | Adventure Simulations | Call of Cthulhu (Classic) | Connecticut; 1925; February |
| The Crack'd and Crook'd Manse | 41-68 | Mansions of Madness Volume 1: Behind Closed Doors | CHA23167 | 2020 | Chaosium | Call of Cthulhu (Classic) | Connecticut; February; 1925 |
| Crack'd and Crook'd Manse Extra Handouts | | Crack'd and Crook'd Manse Extra Handouts | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Crafting a Cthulhian Campaign | 14-16 | Abyss Quarterly | 51 | 1993 | Ragnarok Games | Call of Cthulhu (Classic) | |
| Crash Dive | 56-65 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | Oregon; 1920s |
| Crash: A New Beginning | | Cthulhu Maps - Crash: A New Beginning | 037 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Crate | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Crate and the Coffin | 74-87 | Adventures Unlimited | 1 | Spr 1995 | Bootstrap Press | Call of Cthulhu (Classic) | Canada; 1927 |
| The Crawford Inheritance | 68-79 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s; Deep One |
| Crawler | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Crawling Chaos | 39 | White Dwarf | 62 | Feb 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| The Crawling Kingdom | 194-206 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Cray Canyon Cold Snap | 1996 | Roleplay, What, Who, Why and Where? | | | Self Published | Call of Cthulhu (Classic), GURPS (Horror) | Colorado; Winter; 1882 |
| The Crazed | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Crazed | 28-29 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Crazed | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Crazy Circus | | Cthulhu Maps - A Crazy Circus | 102 | Aug 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Creating a Cthulhu Cult | 119-156 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Creating an Investigator | B:6-13 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Creating an Investigator | B:6-13 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Creating and Using Mythos Tomes | 32-34 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Creating Investigators | 30-51 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Creating Investigators | 40-65 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Creating Investigators | 30-51 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Creating Pulp Heroes | 15-43 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Creating Scout-Investigators | 14-35 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Creating the Investigator | A:9-13 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Creating the Investigator | 11-15 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Creating the Investigator | B:6-11 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Creating the Right Atmosphere for Call of Cthulhu | | Chaosium Digest | v37n04 | Jan 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Creating Your Own Cthulhu Mythos Stories | 60-65 | Dark Visions From Beyond | 0 | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Creature Feature | | Chaosium Digest | v10n01 | Apr 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Creature from the Haunted Sea | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Creature of Legend & Folklore | 252-260 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures | 2-53 | First Book of Things | CHA0307 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures | 73-106 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Creatures | 56-85 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures | 57-99 | Silent Hill | | 2009 | Tribal Morgue Studios | Call of Cthulhu (Classic) | |
| Creatures | 152-201 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Creatures and Entities | 63-76 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures from the Dreamtime | 41-51 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The Creatures of the Dreamlands | 66-123 | S. Petersen's Field Guide to Lovcraftian Horrors | CHA23138 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 14-120 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 10-58 | Ye Booke of Monstres I | CHA2349 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 5-52 | Ye Booke of Monstres II | CHA2358 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 11-58 | The Creature Companion | CHA2375 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 132-155 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 148-175 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 86-127 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Creatures of the Mythos | 113-146 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| The Creeper in the Crypt | 100-109 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Creeping Death | | Chaosium Digest | v18n06 | Feb 1997 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1920s |
| Creeping Shadows | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Crepid Fornication | | Crepid Fornication | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Germany; 1928 |
| The Cricket Players | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| Crime | B:8-9 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Crime | 102-103 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Crime | C:8-9 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Crime | 144-145 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Crime and Punishment | 17 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Crime and Punishment | | Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) | |
| Crime Inc | | White Dwarf | 80 | Aug 1986 | Games Workshop | Call of Cthulhu (Classic) | |
| Criminals and Crime | 46-52 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Crimson Eyes and Azure Pools | 41-58 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Bahamas |
| Crimson Letters | 364-383 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | Arkham; October; 1920s |
| Crimson Letters | 364-383 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; October; 1920s |
| Crimson Letters Handout Pack | | Crimson Letters Handout Pack | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Crimson Letters NPCs Art Pack | | Crimson Letters NPCs Art Pack | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | |
| A Critical Commentary upon the Necronomicon | 255-329 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| A Critical Commentary upon the Necronomicon | 434-? | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Crop Over | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Crossed Lines | 50 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Croydon Aerodrome | 53-58 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | London; 1925; October |
| The Crucifix and the Crucible | 19-25 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Cruel Heaven | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Crushed | | Crushed! | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| A Cry for Help | 168-185 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s; Serpentman; Formless Spawn of Tsathoggua |
| Crybaby | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Crying Jester | 22-26 | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| The Crypt | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Crypt in Key West | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Cryptology: Behind the Philosopher's Stone | 27-28 | Cryptych | 5 | 1994 | ILM International | Call of Cthulhu (Classic) | |
| Cryptozoological Society of the Americas | 1 | Tuesday Terribles | 5 | Oct 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Cryptozoologist | 112-116 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| The Crystal Cavern | 54-71 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Massachusetts |
| The Crystal of Chaos | 43-63 | The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | Providence |
| The Crystal of Chaos | M1-M7 | Different Worlds | 34 | May 1984 | Chaosium | Call of Cthulhu (Classic) | Providence; 1920s |
| Crystals | Mar 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cthaat Aquadingen | 76-77 | Challenge | 66 | Nov 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| Cthaat Aquadingen | 283-286 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Cthaat Aquadingen | 312-316 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Cthaat Aquadingen: A Guide to Further Research | | Dagon | 13 | Jun 1986 | Self Published | Call of Cthulhu (Classic) | |
| Cthoab | Mar 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Cthughan: A New Monster | | Chaosium Digest | v18n03 | Feb 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhoid Ramblings | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| Cthulhoid Tales of Terror | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| Cthulhu | | Ancient Cthulhu Cuneiform Tablet III - Cthulhu | VOM011 | 2017 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| Cthulhu 101 | 12-29 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Cthulhu Afrikus | 218-226 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu and the River of Doubt | | Cthulhu and the River of Doubt | | 2007 | Book Ranger | Call of Cthulhu (Classic) | Brazil; 1913 |
| Cthulhu as Lifeguard | Insert 4 | Challenge | 49 | Apr 1991 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| Cthulhu Character Generation.. At the Speed of Fright! | 126-127 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| Cthulhu Corner | 7-? | Portals | 1 | 1993 | Self Published | Call of Cthulhu (Classic) | |
| Cthulhu Covers | | Cthulhu Covers | CHA5106 | 1988 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Cthalling | | Protoplasm | 3 | | Self Published | Call of Cthulhu (Classic) | |
| The Cthulhu Encounter Problem-Solver | 69 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Cthulhu ex Machina | 6-25 | Cthulhu ex Machina | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Poland |
| Cthulhu For President | | Cthulhu for President | CHA5113 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu for President Campaign Kit | | Cthulhu for President Campaign Kit | CHA5109 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| A Cthulhu Grimoire | 8-17 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Idol | 406-407 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Cthulhu Leap | | Chaosium Digest | v17n06 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | Great Race of Yith |
| Cthulhu Literature Within CoC | | Chaosium Digest | v04n12 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Live Companion | | Cthulhu Live Companion | SKP0604 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Cthulhu Lives | 18-27 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Cthulhu Lives: Lovcraftian Horror in GURPS | | Roleplayer | 22 | Nov 1990 | Steve Jackson Games | Call of Cthulhu (Classic), GURPS | |
| Cthulhu Maps - Gateways to Terror | | Cthulhu Maps - Scenario Map Pack - Gateways to Terror | | Mar 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Cthulhu Maps - Starter Pack - City I | | Cthulhu Maps - Starter Pack - City I | | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Cthulhu Matrix | 122-124 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | |
| Cthulhu Metropolis | 39-44 | RPG Review | 18 | Dec 2012 | Self Published | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | A:32-62 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 37-66 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 96-100 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 106-111 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | B:28-57 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 65-68 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 10-12 | Different Worlds | 40 | Jul 1985 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 77-82 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos | 202-215 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Cthulhu Mythos | 37-75 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Mythos as Science Fiction | 46 | The Dreaming Prince | CHA0399 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos in Mesoamerican Religion | 6-10 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Cthulhu Mythos in Mesoamerican Religion | 125-129 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Mythos Knowledge Gained From H. P. Lovecraft Stories? | 2 | Different Worlds | 30 | Sep 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Mythos within Call of Cthulhu | Nov 1995 | www.eerie.fr/~alquier | | | Self Published | Call of Cthulhu (Classic) | |
| Cthulhu Mythos: Questions and Answers | | Ye Booke of Tentacles | 4 | 2003 | The Chaos Society | Call of Cthulhu (Classic) | |
| Cthulhu Rising; Cthulhu and the Psychic | 96-98 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| The Cthulhu Survival Pack | | Chaosium Digest | v26n03 | Jun 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu vs Lakefront City | 19, 31 | Polyhedron | 64 | Oct 1991 | TSR | Call of Cthulhu (Classic), Gangbusters | |
| Cthulhu vs Stormbringer | | Chaosium Digest | v03n06 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Cthulhu Whenever | | Boris | 1 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| Cthulhu Within | | Cthulhu Within | | 2020 | Self Published | Call of Cthulhu (Classic) | |
| Cthulhu without Cthulhu | | Chaosium Digest | v04n02 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Cuban Connection | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cult Classic | Dec 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Cult of Gl'thol'tic | 4-8 | The Cult of Gl'thol'tic | | May 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Cult of N'tse-Kaambl | | Chaosium Digest | v17n02 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Cult of the Growing Star | | Chaosium Digest | v10n01 | Apr 1995 | Chaosium | Call of Cthulhu (Classic) | Japan; 1920 |
| The Cult of Transcendence | 164-287 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Cultist Headquarter | | Cthulhu Maps - A Cultist Headquarter | 022 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Cultists | B:87 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| The Cultists' Lair | B:92-93 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1920s |
| Cultists, Monsters, and Artifacts | 157-190 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Cults and Cultists | 46-47 | Serendipity's Circle | 7 | Mar 1996 | Self Published | Call of Cthulhu (Classic) | |
| Cults and Cultists | 14-15 | Serendipity's Circle | S2 | 1996 | Self Published | Call of Cthulhu (Classic) | |
| Cults and Secret Societies | 131-144 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Cults of Cthulhu | 37-118 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Cults of Cthulhu: The Why, What and How of Creating Cults | 60-61 | The Adventurer | 3 | Aug 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Cults of the Dark Gods | 16-17 | White Dwarf | 71 | Nov 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| Cults of the Dark Gods 2 | 40-41 | White Dwarf | 73 | Jan 1986 | Games Workshop | Call of Cthulhu (Classic) | |
| Culturally Inspired Temple Archetypes | 20-38 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Curio | 1-2 | Curio | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | 1925; June |
| Curious Calibres | | Curious Calibres | | 2011 | Drakat Games | Call of Cthulhu (Classic) | |
| The Curious Cases of Titus Crow | 44-? | Tradetalk | 3 | 1997 | The Chaos Society | Call of Cthulhu (Classic) | |
| Curious Characters | | Curious Characters Deck | CHA23139-KD2 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Curious Characters | | Keeper Decks | CHA23139-KD | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Curious Characters | | Curious Characters Deck | CHA23184-KD2 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Curious Characters | | Keeper Decks | CHA23184 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Curious Things Art Pack | | Curious Things Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Currency of Grief | | Terror of Octobernomicon | GGP2201 | 2022 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Curse | | The Curse | | 1990 | ADP Systems | Call of Cthulhu (Classic) | Boston |
| The Curse of Anubis | 90-96 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Curse of Black Teeth Keetes | | The Curse of Black Teeth Keetes | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Kingsport; June; 1933 |
| The Curse of Chaugnar Faugn | 39-90 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) | New York; Chaugnar Faugn |
| The Curse of Chaugnar Faugn | 21-51 | Curse of the Chthonians | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic) | New York; Chaugnar Faugn |
| The Curse of Chaugnar Faugn | 75-104 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; Chaugnar Faugn |
| The Curse of Eddingsleys | | Chaosium Digest | v06n07 | May 1994 | Chaosium | Call of Cthulhu (Classic) | |
| The Curse of Nephren-Ka | 201-205 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Curse of the Black Pharaoh | 129-200 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Curse of the Centuries | 52-55 | Challenge | 65 | Oct 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | 1920s |
| Curse of the Devil Baby | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Curse of the Idol | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Arkham; January; 1920; Serpentman |
| The Curse of the Kraken | 176-177 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Curse of the Peacock's Eye | 141-180 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | Singapore; 1920s |
| Curse of the Peacock's Eye | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| Curse of the Screaming Skull | 76-101 | Bumps in the Night | PAG1014 | 2012 | Pagan Publishing | Call of Cthulhu (Classic) | Vermont; May; 1923; Non-Mythos |
| Curse of the Tcho-Tcho | 141-160 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | Arkham; 1939 |
| The Curse of the Toad | 101-108 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Curse of Tsathoggua | 30-47 | The Compact Trail of Tsathoggua | CHA2362 | 1997 | Chaosium | Call of Cthulhu (Classic) | Canada |
| The Curse of Tsathoggua | 22-37 | The Trail of Tsathoggua | CHA2308 | 1984 | Chaosium | Call of Cthulhu (Classic) | Canada |
| The Curse of Whateley Manor | 1992 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | England; 1960s |
| Curse the Darkness | Dec 2002 | shoggoth.net | | | Self Published | Star Wars, Call of Cthulhu (Classic) | Deep Space |
| The Cursed Barn | | Cthulhu Maps - The Cursed Barn | 108 | Oct 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Cursed Idol of Manco Capac | | The Cursed Idol of Manco Capac | YH-C-14 | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | Peru; December; 1936 |
| The Cursed Idol of Manco Capac | 127-160 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| The Cursed Journal | 3-83 | The Cursed Journal | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1930s |
| Curtis Sloan, Encyclopedia Salesman | 10-11 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Custodes | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Customs, Passports and Borders | 85-102 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Custos Sanctorum | 165-177 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Cutter Bugs | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Cylais - The Living Heads | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Cylinder | | Chaosium Digest | v22n11 | Dec 1997 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1997; May |
| Cymothite | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| D100 Lovecraftian Headlines | 1-6 | D100 Lovecraftian Headlines | | Jul 2023 | Tabletop Hub | Call of Cthulhu (Classic) | |
| D100 Lovecraftian Rumours | | D100 Lovecraftian Rumours | | Jul 2023 | Tabletop Hub | Call of Cthulhu (Classic) | |
| d20 Call of Cthulhu Errata | 38-42 | d20 Call of Cthulhu Gamesmaster's Pack | CHA8801 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| d20 Cthulhu Townsfolk | 212-224 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| d20 Investigator Backgrounds | 207-211 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| d20 Kingsport Townsfolk | 156-168 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| d20 System Conversions | 165-174 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| d4, d6, d8, d10x1, d10x10, d12, d20 | | Call of Cthulhu Dice | SCTH18 | 2007 | Q-Workshop | Call of Cthulhu (Classic) | |
| Daddy, Daddy | 233-251 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Daggers Drawn: Exotica | 18-19 | Cryptych | 7 | Jul 1994 | ILM International | Call of Cthulhu (Classic) | |
| Dance of Death | | Challenge | 73 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) | Atlach-Nacha |
| Dancers in an Evening Fog | B:26-32 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| Dancers in an Evening Fog | B:7-31 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| Dancers in an Evening Fog | A:61-82 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| Dances of Vice, Horror, and Ecstacy | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | Germany |
| Dangerous Play | | Chaosium Digest | v17n01 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Dangerous Play | 40-41 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Dangerous Play | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Dangerous Toys | | Chaosium Digest | v18n02 | Jan 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Dangerous Winds | 116-118 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Classic) | |
| The Dare | 39-48 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Classic) | Midwest; 1920s |
| The Dare | | The Dare | | 2017 | Sentinel Hill Press | Call of Cthulhu (Classic) | Midwest; 1920s |
| Dark Adventures: Dark Deeds in the Dead of Night | 26-37 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Dark Brotherhood | 17-18 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | |
| Dark Carnival | 5-38 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) | Providence; May; 1920s |
| Dark Carnival | 109-127 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Providence; 1920s; May |
| Dark Carnival | 2-20 | Curse of the Chthonians | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic) | Providence; 1920s; May |
| The Dark Continent | | The Devil's Advocate | v2n1 | | Self Published | Call of Cthulhu (Classic) | Sub-Saharan Africa; 1920s |
| Dark Delvings | 4-22 | A Time to Harvest Episode 4 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| Dark Delvings | 193-222 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| The Dark Demon | 62-71 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Dark Denizens of Dream and Beyond | 50-55 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Dark Destiny | 94-98 | Ye Booke of Tentacles | 2 | 1999 | The Chaos Society | Call of Cthulhu (Classic) | |
| Dark Dreams of Innsmouth | 4-15 | The Unbound Book | 2 | Aug 2005 | Unbound Publishing | Call of Cthulhu (Classic) | Innsmouth; Deep One |
| The Dark Fertility | 64 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Classic) | |
| A Dark Forest | | Cthulhu Maps - A Dark Forest | 027 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Dark Harvest | 88-105 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Iowa; July; 1920s; Dark Young of Shub-Niggurath |
| Dark Harvest | 98-114 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | Iowa; July; 1920s; Dark Young of Shub-Niggurath |
| Dark Haunting | | Dark Haunting | | 2017 | Dark Cult Games | Call of Cthulhu (Classic) | 1920s |
| Dark Incal | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Egypt |
| Dark Incal | 29 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Egypt |
| Dark Incal | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Egypt |
| The Dark Planet: Round 1 | | The Dark Planet: Round 1 | | 2004 | Self Published | Call of Cthulhu (Classic) | England; 2005; October |
| The Dark Planet: Round 2 | | The Dark Planet: Round 2 | | 2004 | Self Published | Call of Cthulhu (Classic) | England; October; 2005 |
| Dark Rivals | 24-42 | Dead Reckonings | CHA2373 | 1998 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928; Ghoul |
| Dark Road | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Dark Seas, Dark Dreams | | Dark Seas, Dark Dreams | | 2006 | ADP Systems | Call of Cthulhu (Classic) | England |
| Dark Swamp | 109-118 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Dark Web | 4-19 | The Dark Web | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Australia; 1920s |
| The Dark Wood | 52-67 | Adventures in Arkham Country | CHA2342 | 1993 | Chaosium | Call of Cthulhu (Classic) | Dunwich |
| Dark Young of Shub-Niggurath | | Ancient Cthulhu Cuneiform Tablet I - Dark Young of Shub-Niggurath | VOM009 | 2017 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| Darkclaw | 15-18 | Imagine | 13 | Apr 1984 | TSR | Call of Cthulhu (Classic) | New England; 1922; Y'Golonac |
| The Darkened Hermitage | | The Darkened Hermitage | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Canada; October; 1933 |
| A Darker Shadow Over Innsmouth | 120-124 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Darkic Language | | The Darkic Language | | 2017 | Drakat Games | Call of Cthulhu (Classic) | |
| The Darkic Language Addenda | | The Darkic Language Addenda 1 | | 2017 | Drakat Games | Call of Cthulhu (Classic) | |
| Darkisle Maps | | Darkisle Maps | | | Drakat Games | Call of Cthulhu (Classic) | |
| The Darkness Beneath the Hill | 14-34 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | Providence; 1920s |
| The Darkness Beneath the Hill | | Maps for The Darkness Beneath the Hill | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Darkness Illuminated | 113-130 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | Arkham; 1928; April |
| Darkness, Descending | 41-63 | Cthulhu Britannica | CB7350 | 2009 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1930s; Cyaegha |
| Darkshade | | The Blasphemous Tome | 11 | Nov 2023 | Self Published | Call of Cthulhu (Classic) | |
| Das Teufelherz | 19 | The Unspeakable Oath | 21 | Jul 2012 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Das Teufelherz | 229 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Daughter of Set | 1-21 | The Daughter of Set | | 2003 | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Daughter of Shub-Niggurath | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Day at the Race | | Cthulhu Maps - A Day at the Race | 120 | Oct 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Day Necronomicon Burned | 1 | The Day Necronomicon Burned | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Day of Reckoning | 193-203 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Canada; 1931 |
| Day of the Beast | 61-64 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Egypt; September; 1929 |
| Day of the Beast | 114-118 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1929; September |
| Day of the Beast | 81-84 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Egypt; September; 1929 |
| Day One | 10-25 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Day Six | 56-68 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Day Three | 39-46 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Day Two | 26-38 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| Days Four and Five | 47-55 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| DC-3 in Distress | | Cthulhu Maps - DC-3 in Distress | 033 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| de Medici Manoscritto | 42-48 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| De Rerum Supernatura | 120-127 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| De Schip Zonder Schaduw | 18-44 | Whispers from the Abyss | T-4 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Atlantic Ocean; June; 1929 |
| De Vermis Mysteriis | 6-7 | Dagon | 7 | May 1985 | Self Published | Call of Cthulhu (Classic) | |
| De Vermis Mysteriis | 71-77 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| De Vermis Mysteriis: An Update | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic) | |
| The de'Vere Pool | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| The de'Vere Pool | 21-22 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The de'Vere Pool | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Dead Boarder | | Dead Boarder | | 2016 | Chaosium | Call of Cthulhu (Classic) | Providence; June; 1931 |
| The Dead Boarder | | Gateways to Terror | CHA23140 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Dead Body Shore | | Dead Body Shore | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1925; March |
| Dead Dogs and Black Roots | | Dead Dogs and Black Roots | | 2004 | Self Published | Call of Cthulhu (Classic) | Europe; 1929 |
| Dead End | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Dead in the Water | 91-115 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | Kingsport |
| Dead in the Water | 128-155 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Summer |
| Dead Leaves Fall | 119-132 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Halloween; Lesser Race |
| Dead Light | 3-18 | Dead Light | CHA23132 | 2013 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Dead Light | 5-30 | Dead Light and Other Dark Turns | CHA23159 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Dead Man Stomp | 236-244 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Dead Man Stomp | 270-278 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Dead Man Stomp | 177-184 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Dead Man Stomp | C:51-77 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Dead Man Stomp | 270-279 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Dead Man Stomp | 270-279 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Dead Man Stomp | 270-279 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Dead Man Stomp | C:51-77 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Dead Man's Bluff | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Dead Man's Bluff | 33-34 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Dead Man's Bluff | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Dead Man's Morris | 111 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England |
| Dead Man's Peak | | Dead Man's Peak | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | Colorado; 1930s |
| Dead of Night | 135-150 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Dead of Night | Aug 2016 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic), GURPS | Arkham; 1920s |
| Dead of Night | 189-206 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Dead of Winter | 39-58 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Canada; November; 1928; Gnoph-Keh |
| Dead on Arrival | 87-94 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Autumn; 1982; Zombie |
| Dead on Arrival 2 | 90-100 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1982; Zombie |
| The Dead Sea | 57-79 | The Thing at the Threshold | CHA2339 | 1992 | Chaosium | Call of Cthulhu (Classic) | Israel; 1927 |
| The Dead Travel Fast | 31-39 | Role Player Independent | 4 | Mar 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | 1920s; Vampire |
| Dead?and Buried? | 9 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Deadlight | | Cthulhu Maps - Dead Light and Other Dark Turns | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Deadly Creation | 15-16 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| Deadwave | 3-17 | Deadwave | cr3003 | 2012 | Cthulhu Reborn | Call of Cthulhu (Classic) | Nyarlathotep |
| Deadwave, Part One | | Chaosium Digest | v09n04 | Dec 1994 | Chaosium | Call of Cthulhu (Classic) | Nyarlathotep |
| Deadwave, Part Three | | Chaosium Digest | v09n06 | Dec 1994 | Chaosium | Call of Cthulhu (Classic) | Nyarlathotep |
| Deadwave, Part Two | | Chaosium Digest | v09n05 | Dec 1994 | Chaosium | Call of Cthulhu (Classic) | Nyarlathotep |
| Death (and Love) in a Gondola | C:86-104 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Death (and Love) in a Gondola | C:7-42 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Death (and Love) in a Gondola | B:7-36 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Death and Horror Incorporated | 137-165 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland; 1920s; Ghoul |
| Death by Misadventure | 36-63 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | England; 1927; September |
| Death in Dunwich | 5-35 | Death in Dunwich | T-2 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Dunwich; April; 1922 |
| A Death in Dunwich | | Valkyrie | 28 | 2003 | Partizan Press | Call of Cthulhu (Classic) | England |
| Death in Luxor | 3-37 | Age of Cthulhu Vol. I: Death in Luxor | 7001 | 2008 | Goodman Games | Call of Cthulhu (Classic) | Egypt; 1924 |
| A Death in the Family | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Death in the Family | 32-33 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| A Death in the Family | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Death in the Post | 57-64 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | United Kingdom; 1920s; Hunting Horror |
| Death is the Final Escape | 4-41 | Death is the Final Escape | | May 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; September; 1919 |
| The Death of a Sea Captain | 37-46 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | New York; 1933; September |
| Death of Dolphins | 40-? | Polyhedron UK | 2 | Nov 1998 | TSR | Call of Cthulhu (Classic) | 1990s |
| Death of Dolphins Player Aids | 14-? | Polyhedron UK | 3 | Jan 1999 | TSR | Call of Cthulhu (Classic) | |
| Death Reports | 127-132 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Death Scenes: Aftermaths of Cthulhoid Kills | 14-15 | Different Worlds | 35 | Jul 1984 | Chaosium | Call of Cthulhu (Classic) | |
| Death's Head Spider | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Death's Warm Embrace | | Death's Warm Embrace | | May 2021 | Chaosium | Call of Cthulhu (Classic) | Zombie |
| The Debunker | 119-122 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Classic) | |
| Deception Island | 4-32 | Deception Island | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | Norway; 1928 |
| The Decievers | 54-65 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Decrepit Blade | 69-70 | Protodimension | 7 | Win 2010 | Kinstaff Media | Call of Cthulhu (Classic), Dark Conspiracy | |
| Dee Kupp and Eva Destrucctione confront Gnarlyhotep The Surfer with 1000 Toes | Insert 4 | Challenge | 60 | May 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| The Dee Signet | Nov 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Deep Cellars | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Deep Dream Shadows | | Deep Dream Shadows | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Deep End | 241-268 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Deep Mud | 4-24 | Deep Mud | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Australia; 1924 |
| Deep One Diary | 148-160 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Deep One Hybrid - Aberrant | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Deep One Hybrid - Abomination | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Deep One Reproduction | 161-163 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Deep One Scientists | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Deep Ones | 88-119 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Deep Ones of Shellbourne | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Deep Ones of Shellbourne, Part 1 | | Chaosium Digest | v34n05 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Deep Ones of Shellbourne, Part 2 | | Chaosium Digest | v34n06 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Deep Ones of Shellbourne, Part 3 | | Chaosium Digest | v34n07 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Deep Ones of Shellbourne, Part 4 | | Chaosium Digest | v34n08 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| Deep Trouble | 70-74 | Challenge | 54 | Nov 1991 | Games Designers Workshop | Call of Cthulhu (Classic) | New York; 1926; September; Cthugha; Deep One |
| Deep Trouble | | Deep Trouble | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1928 |
| Deep, Once | 3-10 | Deep, Once | | Jul 2019 | Chaosium | Call of Cthulhu (Classic) | London; Deep One |
| Deep-Seeded Secrets | | Deep-Seeded Secrets | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; December; 1922 |
| Deep-Seeded Secrets | 42-67 | Embraced Fate | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1922; December |
| Deeper Than Skin | 39-65 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Deeper Than Skin | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Japan |
| Deer Camp | | Deer Camp | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | Michigan; 1932 |
| Deer Woman | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Default Skill Characteristics in Call of Cthulhu | Dec 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Deities and Great Old Ones | 289-313 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Deities and Monsters | 70-79 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Deities of the Mythos | 121-251 | Malleus Monstrorum | CHA23102 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Deities of the Mythos | 59-108 | The Creature Companion | CHA2375 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Deities of the Mythos | 160-177 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Deities of the Mythos | 181-201 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Deities of the Mythos | 23-252 | Malleus Monstrorum Volume 2: Deities of the Mythos | CHA23169 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Deities of the Mythos | B:23-252 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Deja-vu? | May 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Deliver Me From Evil | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Delivery | 48-49 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Delivery | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Delivery | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England |
| Demiurge of Daoloth | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Demon in St Niclaus' Church | 78-83 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | Ireland |
| The Demon in St Niclaus's Church | 154-160 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Ireland |
| The Demon of the Ring | 227-234 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Demon Run | 19-21 | Serendipity's Circle | 3 | May 1995 | Self Published | Call of Cthulhu (Classic), Chill, Bloodshadows | 1926 |
| Demon Trees | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Demons Dreaming | 139-159 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Demons of Cthulhu | 62-72 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Demons of Cthulhu | 90-105 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The DeMonte Clan | 84-123 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Denizens of the Deep | | Tradetalk | 7 | 2000 | The Chaos Society | Call of Cthulhu (Classic) | |
| Departure | 54-67 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | New York; September; 1933 |
| The Depths of Bermuda | | The Depths of Bermuda | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Bermuda; March; 1928 |
| Der Hexenhammer, Part 1 | | Chaosium Digest | v36n01 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) | Arkansas; 2000 |
| Der Hexenhammer, Part 2 | | Chaosium Digest | v36n02 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) | Arkansas; 2000 |
| Der Hexenhammer, Part 3 | | Chaosium Digest | v36n03 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) | Arkansas; 2000 |
| The Derelict | 5-22 | The Derelict | CHA23150 | 2016 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean |
| The Descent into the Abyss | 53-64 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Descriptive Wound System | 2000 | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic) | |
| The Desecration | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Desert Wastes | | Cinematic Environs: Desert Wastes | | Feb 2019 | Critical Hit Publishing | Call of Cthulhu (Classic) | |
| Designing Scenarios | 33-48 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Desire Made Manifest | 101-113 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | Iceland |
| Desperate Remedies | 1999 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Desperate Remedies | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Deus Ex Machina | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Deus ex Machina | 9 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| Devapura and M'Bolo Bakula, the Flying Eater | 89-98 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| The Device or Rods, Wheels and Mirrors | 408-409 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Devil Cuts In | 9-22 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Monserrat |
| The Devil Eats Flies | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | Germany |
| The Devil is in the Detail | 4-38 | Tales of Death & Darkness | CHA0321 | 2005 | Chaosium | Call of Cthulhu (Classic) | New York State |
| Devil Reef | 131-139 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1928; February; Deep One |
| Devil Reef | 132-138 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Devil Reef | 206-223 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Devil's Agents | 22-38 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1925; Halloween; Dark Young of Shub-Niggurath |
| Devil's Canyon | 33-39 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | California; 1924; Lesser Race |
| Devil's Canyon | 77-91 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | California; 1924; Lesser Race |
| Devil's Canyon | 33-39 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | California; 1924; Lesser Race |
| The Devil's Diamonds | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Devil's Hole | 1-23 | In the Shadows | CHA2357 | 1995 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1927 |
| Devil's Pool | | Four Letters At Random | | | Self Published | Call of Cthulhu (Classic) | England |
| Devilarium: The Mythos Merchant | | The Mythos Merchant | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Deviletarium | | Deviletarium | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Devious Desert Dilemma | 174-175 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| The Devourer | 104-120 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | Arkham |
| The Devouring of S'lithik Hhai | 34-42 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Dhanurvidya, Varman and Avarna | 66-78 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Diary of Helen Dubouis | 47-56 | Twilight Memoirs | CHA0325 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Dice Bag | | Call of Cthulhu Dice Bag | | | Q-Workshop | Call of Cthulhu (Classic) | |
| Dice Cup | | Call of Cthulhu Dice Cup | | | Q-Workshop | Call of Cthulhu (Classic) | |
| Dice Tower | | Call of Cthulhu Dice Tower | | | Q-Workshop | Call of Cthulhu (Classic) | |
| Dies Irae: The Time Has Come | Nov 1995 | www.eerie.fr/~alquier | | | Self Published | Call of Cthulhu (Classic) | California; Summer |
| Different Callers of Cthulhu | Mar 2004 | Pyramid Volume 2 | | | Steve Jackson Games | Call of Cthulhu (Classic) | |
| The Dig | 90-126 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| Diggin' Up the World | | Diggin' Up the World | SSP001 | 2008 | Sixtystone Press | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Digging for a Dead God | | Curse of the Yellow Sign | | 2015 | John Wick Presents | Call of Cthulhu (Classic) | Sub-Saharan Africa; 1939; May |
| Digging for a Dead God | | Curse of the Yellow Sign Act 1: Digging for a Dead God | 1 | 2009 | Wicked Dead Brewing | Call of Cthulhu (Classic) | Sub-Saharan Africa; May; 1939 |
| The Digital Tome | 14-21 | Protodimension | 21 | Aut 2014 | Kinstaff Media | Call of Cthulhu (Classic), Fate of Cthulhu | |
| The Dilemma in the Desert | 4-15 | The Dilemma in the Desert | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | California |
| A Diner on the Road | | Cthulhu Maps - A Diner on the Road | 095 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Dinner of Horrors | | Cthulhu Maps - The Dinner of Horrors | 056 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Dinner Party | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Dinner Party | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Dinosaur Experiment | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Dinosaur Experiment | 18-19 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| Dinosaur Experiment | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Dinosaur Experiment | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England |
| A Dire Complaint | 90 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Dire Documents | 1-9 | Dire Documents | CHA5112 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Dirigible: A Sample Vehicle | 96-98 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Dirty Curtain | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Disappeance | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Disappeance | 19-20 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Disappeance | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Disappearance of Dr Benwell | | Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) | England; 1920s; Yog-Sothoth |
| The Disappearing Fog | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Discarded Parcel | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Disciples of the Worm | 50-83 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Disintegrator | 135-157 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | New England; 1930s; Mi-Go |
| The Disk of Outre Past | 47-48 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| The Dispossessed | | The Dispossessed | | 2001 | Self Published | Call of Cthulhu (Classic) | |
| Dissonance | 1-2 | Dissonance | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | London; 1920s |
| Distinguishing the Horde | 34-35 | The Blasphemous Tome | 9 | Jun 2022 | Self Published | Call of Cthulhu (Classic) | |
| Districts of London | 17-54 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| A Dive to Strange Depths | 5-34 | A Dive to Strange Depths | | May 2023 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1920s |
| Divination Skills | 8-11 | Different Worlds | 25 | Nov 1982 | Chaosium | Call of Cthulhu (Classic) | |
| Doctors and Medicine | 57 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Documents in the Case of Elizabeth Akeley | 199-232 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Documents in the Case of Elizabeth Akeley | 212-245 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Dog Soldiers | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Dog Will Hunt | 37-61 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | Louisiana; 1920s |
| Dog Will Hunt | 39-64 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | Louisiana; 1920s |
| Doing It With Class: Four Professions for Call of Cthulhu | 36 | Different Worlds | 36 | Sep 1984 | Chaosium | Call of Cthulhu (Classic) | |
| The Dollars of Dagon | 9 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Dollars of Dagon | 91 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Dollmaker | 51-64 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | London; 1938; Doll |
| The Dolmens Clearing | | Cthulhu Maps - The Dolmens Clearing | 007 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Dolphin Tides | | Chaosium Digest | v04n03 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Donors | | Donors | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Doom From Below | 1-31 | The Doom From Below | OWC4002 | 2008 | Super Genius | Call of Cthulhu (Classic) | New England |
| The Doom that Came to Innsmouth | 62-87 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Doom that Came to Melbourne | | The Doom that Came to Melbourne | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Australia; Ghoul; Flying Polyp |
| The Doom That Came to Winchester | | The Doom That Came to Winchester | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | Kentucky; September; 1925 |
| The Doom Train | B:33-42 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| The Doom Train | B:32-44 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| The Doom Train | A:83-94 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| The Door Beyond | Nov 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Washington; 1921 |
| Door to Door Darkness | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Door to Saturn | 235-256 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Door to the Sky | | Door to the Sky | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | Arkham; Byakhee |
| Doors in the Earth | | Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Classic) | |
| Doorway of the Gods | 140-167 | A Time for Sacrifice | NCG-TFS-HC-01 | 2020 | New Comet Games | Call of Cthulhu (Classic) | Honduras; 1928 |
| Doorways to Adventure | | Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Classic) | |
| The Double Tower | 27-33 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Dove's Bay | A:2-24 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; Summer; 1922 |
| Down New England Town | | Down New England Town | | May 2018 | Chaosium | Call of Cthulhu (Classic) | New England; 1990s; Ghoul |
| Down to Earth With a Bump | 3-5 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | |
| Down to New England Town | 312-315 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | New England; 1990s; Ghoul |
| Downtown | 31-48 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Dr Clarke's Cabin | | Dr Clarke's Cabin | | Jan 2020 | Chaosium | Call of Cthulhu (Classic) | New England; 1920s |
| Dr Goddard's Rocket Test | 82-91 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | Kingsport |
| Dr John Dee's Necronomicon | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | |
| Dr Reginald Aster | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Dr Xander's Cottage | 7-10 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Dr Xander's Cottage | 12-15 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Dracula, the Great Old One | | Dracula, the Great Old One | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Dragon of Wantley | 1-26 | The Dragon of Wantley | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| The Dragon Project: Mr Josh Wellmeat | 41-42, 44, 46 | Dragon | 198 | Oct 1993 | TSR | Call of Cthulhu (Classic) | 1920s |
| Drake's Legacy | 110 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1920s; Colour Out of Space |
| Dramatis Personae | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | |
| Dramatis Personae Pack | | Dramatis Personae Pack | | Jun 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Draugr | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Drawn from the Dark | | Drawn from the Dark | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Drawn From the Water | 87-109 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Innsmouth; Kingsport |
| Dread Secrets | 226-232 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Call of Cthulhu (Classic), Pathfinder, Dungeons and Dragons | Pennsylvania; 1935 |
| Dread Tales of Mystery | 14-16 | Protodimension | 2 | Aut 2009 | Kinstaff Media | Call of Cthulhu (Classic) | |
| The Dreaded Dinosaur Doomsday | 184-185 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Dream a Little Dream for Me | | Nightscapes | 12 | Dec 1999 | Self Published | Call of Cthulhu (Classic) | 1925; March |
| The Dream Factory | 137-145 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Dream Factory | 138-177 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Los Angeles; 1926; Autumn |
| Dream House | | Dream House | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; 1923; Winter |
| The Dream Ring | 22-23 | Serendipity's Circle | 8 | Sum 1996 | Self Published | Call of Cthulhu (Classic) | |
| The Dreamer | 8-13 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | New York; Summer; 1928 |
| The Dreamer | 34-42 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | New York; Summer; 1928 |
| The Dreamer | 25-33 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; Summer; 1928 |
| Dreamfires | 24 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Dreamfires | 24 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Dreamfires | 1993 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Dreaming Blanket | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Dreaming City | 538-? | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Dreaming of the River of Night | 120-130 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | Tibet; Gug |
| Dreaming of Times Gone By | 121-122 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | |
| The Dreamlands | 193-195 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Dreams and Broken Wings | 207-230 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | New York; 1920s |
| Dreams and Broken Wings | 183-208 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Dreams and Fancies | 68-90 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Zoog |
| Dreams and Fancies | 103-127 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Zoog |
| The Dreams in the Witch House | 9-25 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Dreams in the Witch House | 18-48 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Dreams Lost At Sea | 15 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | Kingsport |
| Dreams of Dunwich | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Dreams of Egyptos | 27-52 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1928; June |
| Dreams of Silk | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Pennsylvania |
| Dreams of Yig | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Dreamtime Myths of the Northwest | 391-395 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Dressed for a Flowery Death | 36-39 | Different Worlds | 27 | Mar 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Dried Cat | 57-59 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Drifted into Madness | | Drifted into Madness | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Mediterranean Sea; 1920s |
| The Drifting House | 1 | A Letter From Yuggoth | 2 | Apr 2016 | Yaqqothl Press | Call of Cthulhu (Classic) | |
| A Drink, Sir? | 2:42 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Drinking in the Blue | | Chaosium Digest | v12n12 | Feb 1996 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Drinking in the Blues | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | 1920s |
| Drinks From Strangers | Jan 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Drooler in the Dark | 3-7 | Opifex Bimonthly | 1 | 1996 | Self Published | Call of Cthulhu (Classic) | |
| The Drooler in the Dark | 157-162 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | |
| The Drooler in the Dark | 1-6 | The Drooler in the Dark | | 1998 | Self Published | Call of Cthulhu (Classic) | |
| The Drooler in the Dark | | The Drooler in the Dark | | Mar 2018 | Chaosium | Call of Cthulhu (Classic) | |
| The Drowned Girl's Story | | Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Drowned Girl's Story | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Drowned Revenant | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Drowned We are Born | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| The Druids | 6-7 | Different Worlds | 41 | Jan 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Dublin | 58-62 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| The Dudleytown Curse | 1-12 | The Sorcerer's Scroll | 25 | 1987 | Self Published | Call of Cthulhu (Classic) | New England; 1937; Summer |
| Dummy Hand | 5-22 | Dummy Hand | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; May; 1926 |
| The Dunwich Horror | 118-122 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| The Dunwich Horror | 18-39 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Dunwich Horror | 9-26 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Dunwich Horror | 155-160 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Dunwich Village | 27-47 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Dunwich Village Maps | | Dunwich Village Poster Maps | | 2020 | Lore Wise Games | Call of Cthulhu (Classic) | |
| Durham Cathedral | 53-63 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; 1929; July |
| Dust to Dust | 6-23 | Dead Reckonings | CHA2373 | 1998 | Chaosium | Call of Cthulhu (Classic) | Martin's Beach; Zombie |
| Dweller in Darkness | 24-27 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Dweller in Darkness | 69-100 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Dwellers in the Aztec Night: Nightmares of the Mexican Indians | 18-20 | Different Worlds | 39 | May 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Early 20th Century (1900-1930) | 45-47 | This Old Haunted House | CHA0361 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Early 20th Century (1900-1930) | 44-58 | This Old Haunted House, Too | CHA0373 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Early Modern (1500-1799) | 26-37 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Earth, Sky Soul | 18-20 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | Dunwich |
| Earth, Sky, Soul | 151-154 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | Dunwich |
| Earth: Rest Stop, Body Shop | 56-64 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Classic) | Michigan; October |
| Earthly Delights | | Earthly Delights | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | Spain |
| Earthquake & Fire | 60-62 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Easter in Arkham | 91-132 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Arkham |
| Easter in Arkham | | The Lovecraft Country Holiday Collection | GGP | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Arkham |
| The Eater of Children | Feb 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Eater of Luck | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Eaters of the Dead | 99-100 | Ye Booke of Tentacles | 1 | 1998 | The Chaos Society | Call of Cthulhu (Classic) | |
| Ebon Roots | | Ebon Roots | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1922 |
| Ebon Roots | 91-134 | Embraced Fate | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1922 |
| Ech-Pi-El's Aegypt | 235-? | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Echo Swine | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Echoing Whispers | | The Echoing Whispers | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Boston |
| Economy and Standard of Living | 12-15 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| An Economy of Crime | 58-61 | King of Chicago | CHA2348 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Ectoplasmorphia | | Ectoplasmorphia | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | United States; 1926 |
| Edge of Darkness | 225-232 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| The Edge of Darkness | 256-264 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| The Edge of Darkness | 161-169 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| Edge of Darkness | C:19-50 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| Edge of Darkness | 256-264 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Edge of Darkness | 256-264 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Edge of Darkness | 256-264 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Edge of Darkness | | Cthulhu Maps - Edge of Darkness | | Jul 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| Edge of Darkness | C:19-50 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| Edward Morse | 24-25 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Efficacious Wizadry | 23-29 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| Egg Out of Time | 6-34 | A Time for Sacrifice | NCG-TFS-HC-01 | 2020 | New Comet Games | Call of Cthulhu (Classic) | Mexico; 1925 |
| Egypt | 295-384 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1925 |
| Eibon Saith; or, The Apophthgmata of Eibon | 20-26 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Eibonic Rituals | 302-356 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Eidolon of the Blind | 115-132 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Ein Konto der Hexeraserei im Lindheim | 18 | The Unspeakable Oath | 21 | Jul 2012 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Ein Konto der Hexeraserei im Lindheim | 228 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| El Campo De Gibraltar | 10-14 | Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) | |
| El Dia de los Muertos | 43 | Shadis | 52 | Oct 1998 | Alderac Entertainment Group | Call of Cthulhu (Classic) | |
| El Tigre, y la Piramede de Destruccion | 61-75 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | Mexico; 1965; Alien |
| Elder Party Nomination Kit | | Elder Party Nomination Kit | CHA2383 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Eldritch Fauna | 3-12 | Eldritch Fauna | | 2012 | Drakat Games | Call of Cthulhu (Classic) | |
| Eldritch Flora | | Eldritch Flora | | 2013 | Drakat Games | Call of Cthulhu (Classic) | |
| Eldritch Invertebrae | | Eldritch Invertebrae | | 2018 | Drakat Games | Call of Cthulhu (Classic) | |
| Eldritch Symbiont | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Eldritch Usurper | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Elevator | | Valkyrie | 18 | 1999 | Partizan Press | Call of Cthulhu (Classic) | New York; 1931 |
| The Elevator | | Timeout | 15 | | Self Published | Call of Cthulhu (Classic) | |
| Eleven Changeling Children | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| Eleven Changeling Children | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | December; Great Race of Yith |
| Elixir of Death | 1-79 | Elixir of Death | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | Colorado |
| Elixir of Eibolith | 5-52 | Elixir of Eibolith | | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | Pennsylvania; 1921; September |
| Elliot Montgomery, esquire | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Elrich House Map | | Elrich House Map | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Elsewhere for Inspiration | 33-37 | Protodimension | 15 | Spr 2013 | Kinstaff Media | Mythos, Call of Cthulhu (Classic) | |
| Emotional Support Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Empire of the Incas | 10-14 | Different Worlds | 42 | May 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Empire of the Sun | 10-44 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Empty Streets | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| En-Naddaha / Dread Siren of the Nile | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Enchanted Evening | 35-66 | Farewell, My Sanity | CHA0346 | 2007 | Chaosium | Call of Cthulhu (Classic) | California; 1923; Yog-Sothoth |
| Enchanted Wood | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Enchanted Wood | 20 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| Enchanted Wood | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The End of Paradise | 260-271 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | Arkham |
| The End of the World | 58-61 | Whispers in the Dark | 0003 | Oct 1993 | Triad Entertainments | Call of Cthulhu (Classic) | |
| End of the World | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Endless Light | | Endless Light | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Enemy Within | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | 1920s |
| Engine Trouble | 73-81 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Massachusetts |
| Engineered | 96-110 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| England | 177-294 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| English as She is Spoke: A Dictionary of 1920s Terminology | 52-55 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Entamaphobia | | Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Classic) | |
| Entertainment | 15-23 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Entertainment | 18 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Entertainment | 31-35 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Entertainment in London | A:87-101 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Entr'acte | 41-59 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) | California; 1939 |
| Envenom | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ephraim Mortimer and Sons | 5-6 | The Whisperer | 1 | Sum 1999 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Epilogue | 305-322 | Heinrich's Call of Cthulhu Guide to Carosa | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Carcosa |
| The Epistles of Eibon | 387-398 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Equipment | 92-117 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Equipment & Arms | 45-64 | 1920s Investigator's Companion Vol. I | CHA2343 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Equipment and Supplies | 78-81 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Equipment and Travel Costs | 121-122 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Equipment and Weapons | 344-351 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Ertong He Kuqi De Muqin | 97-120 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York; Lesser Race |
| Eruptors | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Escape from Innsmouth | 73-92 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s; Deep One |
| Escape From Innsmouth | 80-97 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s; Deep One |
| Escape From Mammoth Case | 1-22 | Escape From Mammoth Case | | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | Kentucky; 1926; August |
| Escape from Ravenstone Sanitarium | 5-38 | Ravenstone Sanitarium | CHA0350 | 2008 | Chaosium | Call of Cthulhu (Classic) | New England; 1920s |
| The Esoteric Library: Tracts and Times | 88-92 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Esoteric Order of Dagon | 100-109 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Esoteric Order of Dagon | 104-111 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Essays of Evil | | Essays of Evil | | Jan 2026 | Chaosium | Call of Cthulhu (Classic) | |
| The Essential Guide to Hastur | 9-13 | Ripples From Carcosa | CHA0312 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Eternal Chinaman | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| The Eternal Quest | B:45-52 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Dreamlands; 1927; Ghoul |
| The Eternal Quest | 122-134 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Dreamlands; 1927; Ghoul |
| Ethical Dilemmas in Call Of Cthulhu | | Chaosium Digest | v28n07 | Aug 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Etienne-Laurent de Marigny | 27-30 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| European Automobiles 1893 - 1940 | 7-11 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| The Eve of Oov | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Evening at the Theater | | Cthulhu Maps - An Evening at the Theater | 008 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Events of one 2234 Water St | | Chaosium Digest | v31n12 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Events of one 2234 Water St | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Arkham; 1920s |
| Evidence and Chain of Custody | 51-62 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Evidence File | | Evidence File | CHA23135-Evidence File | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Evidence Files | | Evidence Files | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| The Evil Gun | 76-89 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1870s; Zombie |
| Evil Little Things Volume 1 | | Evil Little Things Volume 1 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Evil Little Things Volume 1 | | Evil Little Things Volume 2 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Evil Little Things Volume 3 | | Evil Little Things Volume 3 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Evil Little Things Volume 4 | | Evil Little Things Volume 4 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Evil Little Things Volume 5 | | Evil Little Things Volume 5 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Evil of the Centuries | 54-57 | Challenge | 77 | 1995 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| The Evil on the East River | | The Evil on the East River | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Evil Things the Keeper can do to Players using magic | 93 | Ye Booke of Tentacles | 2 | 1999 | The Chaos Society | Call of Cthulhu (Classic) | |
| Evil Things The Keeper Can Do To Players Using Magic | | Chaosium Digest | v26n09 | Oct 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Ex Libris Part 1 | 5-6 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Ex Libris Part 2 | 15 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Ex Libris Part 3 | 38 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Ex Libris Part 4 | 89 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Example of Play | 80-81 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Example of Play | 87-88 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| An Example of Play | 53-54 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| An Excavation Site | | Cthulhu Maps - An Excavation Site | 047 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Excerpts and Prayers | 145-147 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Excerpts from the Book of Dzyan | 71-138 | The Book of Dzyan | CHA6027 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Excerpts From the Investigative Journals of Mikhail Aksakov | 64-67 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Excerpts From the Investigative Journals of Mikhail Aksakov | 21-24 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Excursions from Cairo | 58-77 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Exeunt | | Serendipity's Circle | 20 | | Self Published | Call of Cthulhu (Classic) | |
| Exodus from the Ice | 265-267 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; 1933; December |
| Expanding "Lurker in the Sky" | Mar 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1926 |
| Expedition to the Matto Grosso | | Expedition to the Matto Grosso | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1929 |
| Experienced Characters | | Chaosium Digest | v18n09 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Exploding Custists | 1-2 | Exploding Custists | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; 1930s; Star Vampire |
| Explorers on the Moon | | Cthulhu Maps - Explorers on the Moon | 089 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Exploring the Campus | 4-14 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Explosives | 107-109 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Eye Drinkers | Feb 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Eye Drops | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Eye For An Eye | | An Eye For An Eye | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | 1929; October; Hastur |
| The Eye of Daoloth | 22-23 | The Unspeakable Oath | 20 | Jun 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Eye of Daoloth | 168-169 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Eye of Kali | 1-4 | The Eye of Kali | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Eye of Sitar | M1-M7 | Different Worlds | 38 | Jan 1985 | Chaosium | Call of Cthulhu (Classic) | San Francisco; 1920s |
| The Eyes Between Worlds | 114-130 | Strange Tales of Dread & Wonder #1 | CHA0329 | 2006 | Chaosium | Call of Cthulhu (Classic) | Bhutan; Ghoul |
| Eyes in the Mirror | Mar 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Eyes of the Mummy | 141-153 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Eyes Over Ft. Gatz | 1-13 | Eyes Over Ft. Gatz | | 2011 | Self Published | Call of Cthulhu (Classic) | |
| The Face From Below | 72-80 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Face of God | | Chaosium Digest | v16n03 | Sep 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Face of God | 38-39 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Face of God | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Face of God | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| The Face of the Deep | 130-138 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Facehugger for Call of Cthulhu | Apr 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Faceless God | 24-38 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Faceless Human-Like Things | Nov 2018 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Facing Racism in Lovecraft and Call of Cthulhu | 12-13 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Factions and Optional Rules | 181-204 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | |
| The Faculty Party | 23-33 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | Arkham; Shoggoth; Hound of Tindalos |
| Fade to Grey | 76-98 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928; Insect from Shaggai |
| Failure to Appear | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Faint Hymns to the Cold Fruitless Moon | 1-6 | Faint Hymns to the Cold Fruitless Moon | | 2013 | Self Published | Call of Cthulhu (Classic) | June; 1927; Tulzscha |
| The Faithful Granddaughter | 89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Falcon Point Maps | | Falcon Point Poster Maps | | 2015 | Lore Wise Games | Call of Cthulhu (Classic) | |
| The Fallen Arabians, Servitors of the Elder Godess Nemesis | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Fallen Grace | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| False Friends | 23-34 | Bayt al Azif | 2 | Sep 2019 | Bayt al Azif Inc | Call of Cthulhu (Classic) | Germany; 1920s |
| Family Business | 5-26 | Family Business | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | Canada; Winter; 1921 |
| Family Reunion | Sep 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | New York State; June; 1923; Great Old One |
| Family Snapshots | | Chaosium Digest | v38n07 | Nov 2004 | Chaosium | Call of Cthulhu (Classic) | |
| A Family Way | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | New York |
| A Family's Heritage | Sep 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Famished | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Famous Expeditions | 38-48 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Famous People | 14-17 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Fane of the Black Pharaoh | 125-140 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Fane of the Black Pharoah | 114-128 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Fantastic Light Display | 4-11 | Fantastic Light Display | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Farm | | The Farm | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Fate of the Washington Bros. | Apr 2020 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Boston; February; 1922 |
| Fate Rules | | Chaosium Digest | v17n12 | Jan 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Father of War: Avatar of Nyarlathotep | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Fatted Calf | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Faulty Magic in Call of Cthulhu: or, Hey! That's Not a Deep One! That's -- Aargh! | 40 | Space Gamer | 87 | Oct 1989 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| A Favour You Can't Deny | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Fear and Amnesia | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Fear and It's Uses | 33-34 | Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) | |
| Fear and Whiskey | | Valkyrie | 25 | 2002 | Partizan Press | Call of Cthulhu (Classic) | |
| Fear From the Dragonland | | Timeout | 17 | | Self Published | Call of Cthulhu (Classic) | |
| Fear in a Bottle | 3-21 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Classic) | Arkham; October; 1929; Serpentman |
| Fear of Falling | 96-97 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | Star Vampire |
| Fear of Falling | 1-2 | Four Letters At Random | | | Self Published | Call of Cthulhu (Classic) | Star Vampire |
| Fear of Flying | 4-16 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1920s; Serpentman |
| Fear of Flying | 15-17 | White Dwarf | 72 | Dec 1985 | Games Workshop | Call of Cthulhu (Classic) | 1920s; Serpentman |
| Fear the Puca | 138-144 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Ireland |
| Feast and Famine | 187-224 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | Tibet; 1920s |
| The Feaster From Afar | | Coherent Light | | | Self Published | Call of Cthulhu (Classic) | England; August; 1928; Hastur |
| The Feaster From Afar | 271-281 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Feaster from the Stars | 141-149 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Feasters of the Dark | 7-12 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Feasters of the Dark | 19-34 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Featherbrains | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Feats | 38-45 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| A Federal Case: An Examination of the FBI | 22-27 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| A Federal Case: An Examination of the FBI | 19-22 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Federated Oil and Chemical | 4-18 | A Time to Harvest Episode 3 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Arkham; Autumn; 1930 |
| Federated Oil and Chemical | 151-169 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Autumn; 1930 |
| Feed the Many | | Feed the Many | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Italy; 1920s |
| The Feejee Mermaid | 43-45 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Feline Gestalt Consciousness | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Feline Invasion | | Chaosium Digest | v36n07 | Jul 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Fell Walkers | 25-29 | Vollmond | 3 | 1990 | Self Published | Call of Cthulhu (Classic) | |
| Fencing in CoC | | Chaosium Digest | v06n03 | Apr 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Fenland Fog | | Dagon | 7 | May 1985 | Self Published | Call of Cthulhu (Classic) | England; 1920s; Deep One |
| The Ferry Ride | 108-112 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | San Francisco; November; 1920s |
| Fertility | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Festival | 14-18 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Festivals | 38-40 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| A Fete Worse than Death | 2 | A Green, Unplesant Land | | 2016 | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| A Few Notes on the Yellow Sign and The King in Yellow | 31-32 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Field Manual of the Theron Marks Society | 1-12 | Terror from the Stars | CHA2313 | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Field of Screams | | Field of Screams | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Iowa; 1921 |
| The Field of Stones | | Cthulhu Maps - The Field of Stones | 053 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Field Trip | 34-57 | A Time to Harvest Episode 1 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Vermont; Summer; 1930 |
| Field Trip | 67-112 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; Summer; 1930 |
| Figure in Black | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Filing Cabinet | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Final Plea | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Final Reckoning | 2:22 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Finding My Family | | The Blasphemous Tome | 4 | Dec 2018 | Self Published | Call of Cthulhu (Classic) | |
| Finger Biter | 22-33 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Finger Biter | 1-12 | Finger Biter | | 1998 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Finger Biter | 22-33 | Opifex Bimonthly | 18 | Mar 1999 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Finger Biter | | Finger Biter | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1920s |
| A Finger's Worth of Coal | 160-178 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Fire Victim | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | New York |
| Fire Victim | 29-30 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | New York |
| Fire Victim | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | New York |
| Fire Without Light | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Oklahoma; 1921 |
| Firearms | 11-29 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Firearms | 14-15 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Firearms in Call of Cthulhu | 3-13 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Firefights and the Cultist Exception | | Chaosium Digest | v04n04 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Fires of Sumatra | 4-22 | Age of Cthulhu Vol. V: Long Reach of Evil | 7005 | 2011 | Goodman Games | Call of Cthulhu (Classic) | Indonesia; 1928 |
| The First Step is Always The Most Difficult | 123-127 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Classic) | |
| First Time: Call of Cthulhu | | Never Mind the Dice Rolls | 55 | Mar 2026 | NmtDRzine | Call of Cthulhu (Classic) | |
| Fischbuchs: Various Titles from Mythos Literature Relating to Marine Myths | 44-47 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Fish in a Barrel | | Fish in a Barrel | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Fishers of Men | 39-56 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York; September; 1927 |
| Fishhead | 24-33 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| A Fishy Business | 2-10 | A Fishy Business | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| A Fishy Tale | | Blurred Vision | 1 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Five Basic Techniques of Starting a Cthulhu Scenario | 25 | Dagon | 20 | Nov 1987 | Self Published | Call of Cthulhu (Classic) | |
| The Five Dreams of Joe Smith | | Chaosium Digest | v35n12 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Five Dreams of Joe Smith | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Arkham; 1920s |
| Five Go Mad in Wales | 1997 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | Wales; 1935 |
| Five Lights at the Crossroads | 131-146 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| The Fixer | 16-20 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Classic) | |
| Fixx's Fixxit | 20-28 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| Flamethrowers | 105-106 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Flapper | 120-124 | Worlds of Cthulhu | 2 | Feb 2005 | Pegasus Press | Call of Cthulhu (Classic) | |
| Flask of Curses | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Fleas of the Dragon | 131-172 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Flesh Festival | 3-13 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | New England; 1920s; Halloween |
| Flesh Wounds | 3-34 | Flesh Wounds | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1927 |
| Flight 101 | 1-7 | Final Flight | PAG1011 | 2008 | Pagan Publishing | Call of Cthulhu (Classic) | Curacao; 1938; July; Serpentman |
| The Flight North | 137-144 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Arctic; 1930 |
| The Flight to the North | 68-78 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | England; Scotland; November; 1928 |
| Flights into Terror - Now Departing | 58-69 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | Europe; October; 1925 |
| Flippets | | Never Mind the Dice Rolls | 51 | Nov 2025 | NmtDRzine | Call of Cthulhu (Classic) | |
| Floating | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Flood | 4-15 | The Flood | | Feb 2023 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1926 |
| The Flooding of Black Tarn | | The Flooding of Black Tarn | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| Fluke | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Flute of the Gods | | Flute of the Gods | | Aug 2021 | Type40 | Call of Cthulhu (Classic) | |
| Fly Man: The Fly God, Mr Swarm | Oct 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Flying across the Atlantic | 23-32 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1920s |
| The Flying Head | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Fog Lifts | D:201-205 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| The Fog Lifts | D:115-126 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| The Fog Lifts | B:289-298 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| Fog Over Darkbank | 16-21 | Vollmond | 2 | 1989 | Self Published | Call of Cthulhu (Classic) | |
| Foiling the Brotherhood | 65 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | |
| Foiling the Brotherhood | 85 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Folded Space | 1-2 | Folded Space | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Boston |
| A Folklore Bestiary | 29-64 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Folklore Calendar | 66-70 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Folklore Mythos Threats | 77-129 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Folklore: A Closer Look | 10-12 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Follies | 32 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Follow the Sign | 42-59 | Forgotten Symphony | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Followers | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Followers | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Folly of Ponsonby-Wild | | The Folly of Ponsonby-Wild | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | England |
| Fontenelle's Rings | 93-107 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Footsteps | Nov 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Footsteps in the Sky | 169-186 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Footsteps in the Sky | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| For King and Country | 199-213 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; June; 1926 |
| For One Night Only | | For One Night Only | | Jul 2019 | Chaosium | Call of Cthulhu (Classic) | Nyarlathotep |
| For Running Multiple Games | 22-32 | Gatsby and the Great Race | CHA0324 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| For the Love Of? | 4-21 | For the Love Of? | | Oct 2017 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Star Vampire |
| For the Single Game | 33-37 | Gatsby and the Great Race | CHA0324 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| For Whom the Bell Tills No More | 1-8 | For Whom the Bell Tills No More | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | Spain; 1924 |
| Forbidden Books | 6-34 | Keeper's Compendium | CHA2344 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Forbidden Isle | 255-270 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland |
| Foreign Body | | Foreign Body | | Nov 2021 | Arjade Productions | Call of Cthulhu (Classic) | Pacific Ocean; 1920s |
| Forensic Alchemy - Using Alchemical Assays | 22-29 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Forensic DNA Analysis | 308-311 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Forensic Medicine | 121-149 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Forensic Pathology | 196-203 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Forest Altar | | The Forest Altar | | May 2024 | Xapur RPG | Call of Cthulhu (Classic) | |
| The Forgotten | 19 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Forgotten | | Forgotten | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| The Forgotten | 21 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Forgotten Army | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Forgotten but not Gone | Oct 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Forgotten Master of Terror: William Hope Hodgeson Re-visited | 50 | The Adventurer | 11 | Jun 1987 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Fork in the Road | | Fork in the Road | | Sep 2022 | Chaosium | Call of Cthulhu (Classic) | 1930s |
| Forked Tongues | | Chaosium Digest | v07n05 | Aug 1994 | Chaosium | Call of Cthulhu (Classic) | London; Serpentman |
| Forked Tongues | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London; Serpentman |
| Forked Tongues | 5-6 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London; Serpentman |
| Forked Tongues | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London; Serpentman |
| Form 27-B | 155-178 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Formless Nightmare | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Forms, Certificates and Various Handouts | 1-23 | Forms, Certificates and Various Handouts | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Formulary | 19-33 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Formulary II | 41-47 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Fortean and Disasters Timeline | 28-29 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| A Fossil | | A Fossil | | Jan 2020 | Self Published | Call of Cthulhu (Classic) | |
| Four Mythos Writing Instruments | | Hypergraphia | 1 | Nov 2018 | Gladius Games | Call of Cthulhu (Classic) | |
| Four Visiting Ghosts | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | December |
| Four-Bit Characters Volume 1 | | Four-Bit Characters Volume 1 | | Aug 2021 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| The Fractured Rune | | The Fractured Rune | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Fragments | 7-69 | Al-Azif Unearthed: Fragments | | Jul 2024 | Chaosium | Call of Cthulhu (Classic) | Boston; 1926; Autumn |
| Fragments of the Simeon Bible | 61-63 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Classic) | |
| France in the '20s | | Chaosium Digest | v04n11 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Frankenstein Food | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Franklin Waite Price | 68-70 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Freak Show | 6-25 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; Deep One |
| Free the Spirit | 18 | White Dwarf | 68 | Aug 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| The Freighter | Jan 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Florida |
| The French Foreign Legion | 8-15 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | |
| French Justice | 41 | Role Player Independent | 3 | Feb 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | |
| The French Quarter | 12-30 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The French Quarter | 12-30 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| A Fresh Coat of White Paint | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | California |
| Fresh-Water Deep One | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Freud in CoC | | Chaosium Digest | v11n09 | Sep 1995 | Chaosium | Call of Cthulhu (Classic) | |
| A Friend in Need | 51-54 | The Last Province | 2 | Dec 1992 | Last Province Publishing | Call of Cthulhu (Classic) | 1920s |
| The Friends of Mickey Finn | 4-52 | The Friends of Mickey Finn | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1924 |
| The Frogs of Loveland | 1-8 | The Frogs of Loveland | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | |
| From Beyond | 6-8 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| From Foreign Shores, Part 1 | | Chaosium Digest | v24n09 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| From Foreign Shores, Part 2 | | Chaosium Digest | v24n10 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| From Foreign Shores, Part 3 | | Chaosium Digest | v24n11 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| From Foreign Shores, Part 4 | | Chaosium Digest | v24n12 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| From Foreign Shores, Part 5 | | Chaosium Digest | v25n01 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt |
| From France, with Love?craft | Nov 1995 | www.eerie.fr/~alquier | | | Self Published | Call of Cthulhu (Classic) | |
| From the (Spaces Between) Stars | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| From the Archives of the Moon | 366-379 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| From the Parchments of Pnom | 3-8 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| From the Trenches | 62-63 | Challenge | 63 | Aug 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | Arkham; Ghoul |
| The Frozen Pines | | Night Times: The Frozen Pines | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | Maine; 1928; November |
| Fruit from the Dust | | Fruit from the Dust | | May 2024 | Chaosium | Call of Cthulhu (Classic) | Oklahoma; 1936 |
| Ftagnin' in the Dark | 1 | One Thousand and One Nights and One Night | 26 | Mar 2008 | Self Published | Call of Cthulhu (Classic) | |
| Full Auto | | Chaosium Digest | v13n06 | Mar 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Full Circle | 108-135 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; April; 1939 |
| Full set of Cthulhu dollars | | Full set of Cthulhu dollars | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Fundamental Forces | | Fundamental Forces | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Funeral | 60 | The Unspeakable Oath | 23 | Aug 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Funeral | 4-10 | The Funeral | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1925 |
| The Funeral of Jackson Elias | 124-126 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| The Funeral of Jackson Elias | 113-114 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| Fungal Bodies | | Fungal Bodies | | Feb 2026 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| The Fungi of Yuggoth | | Ye Booke of Tentacles | 6 | 2006 | The Chaos Society | Call of Cthulhu (Classic) | |
| Fungus | 28-29 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | Connecticut |
| Furious Driving | 30-43 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Further Adventures in the Congo | 105-107 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| The Further Cases of Titus Crow | | Chaosium Digest | v03n11 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Further Notes on the Necronomicon | 10-13 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Further Notes on the Necronomicon | 129-130 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Future Echoes | 19-32 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Future Echoes | | Future Echoes | | Oct 2019 | Chaosium | Call of Cthulhu (Classic) | |
| The Future?s Shadow | | The Future?s Shadow | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | December; 1924 |
| The G'harne Fragments | 215-219 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The G'harne Fragments | 199-203 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Gabriel Hounds | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Game Mechanics | 11-18 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Game Mechanics | 9-24 | Trail of Cthulhu Condensed Rules | | | Pelgrane Press | Call of Cthulhu (Classic) | |
| Game Mechanics | 3-8 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Game Rules | 7-10 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Game Support Staff | 107-120 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Game System | 60-73 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 82-99 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 10-18 | Call of Cthulhu 7th Edition Quick Start | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | B:14-15 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 82-99 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 17-29 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 24-105 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 24-105 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | 24-105 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Game System | B:14-15 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Game System and Rules | A:14-25 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Game System and Skills | 16-27 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Game System and Skills | 28-45 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Gamemaster | 216-227 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Gameplay | 49-58 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Gang Leaders | 24-29 | Different Worlds | 19 | Feb 1982 | Chaosium | Call of Cthulhu (Classic) | |
| The Gardner Farm | | Cthulhu Maps - The Gardner Farm | 071 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Garrison, Montana | B:3-13 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Montana; May; 1927 |
| Garrison, Montana | 52-68 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Montana; 1927; May |
| The Garson Invaders | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Gate From the Past | 70-74 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | Arkham; June; 1920s; Shoggoth |
| Gate From the Past | 64-67 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Arkham; June; 1920s; Shoggoth |
| The Gates of Hell Shall Not Prevail | 14-20 | The Way, The Truth and the Dice | 2 | Jan 2000 | Christian Gamers Guild | Call of Cthulhu (Classic) | |
| Gatherers: Vampire Variant | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Gathering Darkness | | Nightscapes | 8 | Jul 1998 | Self Published | Call of Cthulhu (Classic) | |
| Gatsby and the Great Race | 10-21 | Gatsby and the Great Race | CHA0324 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Gaudy | 19-27 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | December |
| Gavigan's Scrolls | 208-211 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Gavigan's Scrolls | 193-195 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Gazeteer of His Majesty's United Kingdom | 6-10 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| A Genealogy of the Great Old Ones | | Timeout | 20 | | Self Published | Call of Cthulhu (Classic) | |
| General Hospital | 40-47 | Fictional Reality | 8 | Jun 2002 | Self Published | Call of Cthulhu (Classic) | Texas; 1930s |
| General Information | 2-5 | Bloodmoon's Guide to Historical Fashions: 1920s | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | |
| General Notes on the Book of Eibon | 159-160 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| General Notes on the Book of Eibon | 144-145 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Generating a Parapsycologist Character | 20-22 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Genius Loci | 35-55 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1925; Lloigor |
| Genius Loci Maps | | Maps for Genius Loci | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Genre Rules | 37-50 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Gentlemen and Players | 42-43 | White Dwarf | 74 | Feb 1986 | Games Workshop | Call of Cthulhu (Classic) | |
| Geography | 20-22 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Geography of Ireland | 11-12 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Geography of Tibet | 12-16 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Geology | 108-110 | Ye Booke of Tentacles | 1 | 1998 | The Chaos Society | Call of Cthulhu (Classic) | |
| George Weedon and the Mystery of Emily Keane | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The German Map | 376-377 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| German Titles for Mythos Books | | Chaosium Digest | v05n08 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) | |
| German Titles for Mythos Books | | Chaosium Digest | v05n09 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Getting an Education | 131-150 | Miskatonic University | CHA2389 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Getting Around London | A:33-38 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Getting the Band Back Together | | The Blasphemous Tome | 14 | Feb 2026 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Getting the Creeps | 48-52 | The Last Province | 5 | Aug 1993 | Last Province Publishing | Call of Cthulhu (Classic) | |
| Getting to London | A:26-31 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| A Ghastly Grimoire | 52-54 | Dragon | 126 | Oct 1987 | TSR | Call of Cthulhu (Classic) | |
| Ghost in the Machine | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Ghost Jackal Kill | 29-35 | White Dwarf | 79 | Jul 1986 | Games Workshop | Call of Cthulhu (Classic) | San Francisco; Spring; 1924; Hound of Tindalos |
| Ghost Light | 5-19 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | Scotland; September; 1927; Outer God |
| Ghost Net | 26-27 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Ghost of Easter Past | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Ghost of Heddon Manor | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| The Ghost of Heddon Manor | 9-10 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ghost of Heddon Manor | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ghost of Heddon Manor | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ghost of John | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Ghost of John McSorely | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ghost Trade | | Ghost Trade | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Maine; 1920s |
| Ghost Train | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Ghost Train (2) | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ghost Writer | 48-54 | Challenge | 58 | Mar 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | Boston; 1925; Dimensional Shambler; Great Old One |
| Ghostcatchers | 219-223 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Call of Cthulhu (Classic), Pathfinder, Dungeons and Dragons | Pennsylvania; 1931 |
| Ghosties and Ghoulies and Squid? | 12-14 | White Dwarf | 91 | Jul 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| A Ghostly Presence | 16-23 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Ghosts and Hauntings | 26-32 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Ghosts and Monsters | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Ghosts in the Schoolyard | 17 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Ghosts of the Florentina | 31-53 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Kingsport; Rat Thing |
| Ghosts: A Keepers Guide | 72-75 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Ghostwatch | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ghoul | 1-7 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Ghoul for One Day | | Cthulhu Maps - Ghoul for One Day | 117 | Oct 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Gift | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Gifts of the Gods | | Dagon | 6 | Mar 1985 | Self Published | Call of Cthulhu (Classic) | |
| Giggling Man | Mar 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Girl With No Shadow | | Runestone | 5 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Gladding School | 9-12 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Glass of Enhancement | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Glossolalia | Sep 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Glove Cleaners | 19-20 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Gloves of Pygmalion | | Chaosium Digest | v13n08 | Mar 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Glowing at Hetrick Dam | 69-75 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Glozel Est Authentique | 5-37 | Glozel Est Authentique! | T-5 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | France; 1929; Spring |
| Glycon | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Glyphs of Mythos Gods | 68-69 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Go-By Street | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Goat Mother | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Goatswood | | Cthulhu Maps - Goatswood | 119 | Oct 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Goblin or Bourbon Street | | Goblin on Bourbon Street | GGP1503 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| The God Beneath the Mountain | 211-232 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The God of Mitnal | 62-84 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | Mexico; 1924 |
| The God of Mitnal | 72-94 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | Mexico; 1924 |
| God of the Mountain | 92-105 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Peru; 1920s |
| A God's Dream | 283-330 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | Chicago; 2021; Cthulhu |
| The Godess of the Black Fan | 417-420 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Godess of the Black Fan | 543-547 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Godlike: Mechanics for Call of Cthulhu | | Chaosium Digest | v35n10 | Mar 2002 | Chaosium | Call of Cthulhu (Classic), Godlike | |
| Gods and Goddesses | 60-62 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Gods of Ancient Egypt | 85-86 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Gods of Reality | 305-310 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Gods of Reality | 414-420 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Gods of the Grim Nation | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Gods of the Witches | 33-40 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Going from AD&D to Call of Cthulhu | 19-21 | Opifex Bimonthly | 8 | Jul 1997 | Self Published | Call of Cthulhu (Classic) | |
| Going from AD&D to CoC | | Chaosium Digest | v17n04 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Going to Cairo | 1-12 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Gold Fever | 1-14 | Gold Fever | | Sep 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden |
| The Gold of Roatan | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Golden Fleece | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Golden Goblin | 9-12 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Goliriad the Speaker | | Goliriad the Speaker | | Mar 2018 | Tomb Of Nyarlathotep Games | Call of Cthulhu (Classic) | |
| The Good Boys | | The Good Boys | | Sep 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Good Cthulhu Hunting | 8-11 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Good Goes Bad: The Book Bound in Human Skin | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| Goodnight Mr Smith | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Gotham City '39: The Mirror Eternal | 1-25 | Gotham City '39: The Mirror Eternal | | Feb 2025 | Self Published | Call of Cthulhu (Classic) | United States; 1939 |
| Government and You | 30-37 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Graf Zeppelin | 97-108 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | Germany; July; 1929; Shantak |
| The Grainger Street Plates | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Grand Conclusion | 619-625 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | January; 1926 |
| The Grand Grimoire | 26-193 | The Grand Grimoire of Cthulhu Mythos Magic | CHA23141 | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Grand Guignol | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Grandma's Cookies | | Grandma's Cookies | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | Ohio |
| Grave Robbers | | Grave Robbers | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920s |
| Grave Secrets | 64-89 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | Rhode Island; Spring; 1922 |
| A Grave Situation | 1998 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Grave Situation | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Grave Spirits | 81-86 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Grave Tidings | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Graven Images | 45-46 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Graven Images | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Great and Terrible Hunger | 65-81 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Great Carcosa | | Cthulhu Maps - The Great Carcosa | 066 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Great Harvest | 4-14 | A Time to Harvest Episode 5 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| The Great Harvest | 223-246 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| Great Old Ones on the Great White Way | 63-84 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Classic) | New York; October; 1922; Deep One |
| The Great Trap | | The Great Trap | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1927 |
| Great Uk'tena | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Great Zambini | 17-27 | Serendipity's Circle | 4 | Jul 1995 | Self Published | Call of Cthulhu (Classic), Pandemonium, Chill, Shattered Dreams, Bloodshadows, The Whispering Vault, Mage: The Ascension | Boston; 1926 |
| Great Zimbabwe, Great Archaeological Sites: The Truth by Prof. Simon Davreau (Oxford) | 8,11 | Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) | |
| Greater Bay Area | 63-86 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Greater City | 31-46 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| A Greater Goal | | A Greater Goal | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| A Greater Goal | 59-74 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Greater Grimoire | 143-158 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Greater Quarter | 31-46 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Greatest Adventure | 141-280 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Green and Pleasant Language | 12-13 | White Dwarf | 90 | Jun 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| The Green Book of Murthock | | The Green Book of Murthock | | 2017 | Drakat Games | Call of Cthulhu (Classic) | |
| The Green Decay | 150-158 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Green Door | 1-8 | The Green Door | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Green Fairy | | The Green Fairy | SKP0829 | 2008 | Skirmisher Publishing | Call of Cthulhu (Classic) | Paris; 1898 |
| Green Hell | 7-23 | Final Flight | PAG1011 | 2008 | Pagan Publishing | Call of Cthulhu (Classic) | Brazil; July; 1938; Serpentman |
| Gremlins | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Grey House on a Hill | 53-97 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | Pennsylvania; May; 1928 |
| Grieving Skies | | Grieving Skies | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) | Mexico; 1928 |
| Grim Justice | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Grim Justice | 28 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Grim Justice | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Grim Portrait | 3 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Grim Portrait | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Grim Portrait | 7 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Grim Portrait | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Grimoire | 91-101 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Grimoire | 242-264 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Grimoire | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| Grimoire | 242-264 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Grinning Ghoul | 39-48 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Grotesque Axe | | The Grotesque Axe | | Feb 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Ground Rules | 7-10 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Guardian from the Mother | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Guardian in Gray | | Chaosium Digest | v22n06 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Guardian of the Pit | 205-220 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Guardian Statues of Kom Dakka | 3 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Guardians of El Dorado | 14-18 | Different Worlds | 37 | Nov 1984 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Arkham | 20-91 | The Compact Arkham Unveiled | CHA2356 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Arkham | 19-93 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Arkham | 41-134 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Guide to Arkham | 61-246 | Arkham | CHA23182 | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Dunwich Environs | 64-118 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Hastur, The Yellow Sign and "The King in Yellow" | 5-9 | Ripples From Carcosa | CHA23134 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Kingsport | 33-87 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Lovecraft Country | 246-249 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Lovecraft Country | 280-283 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Guide to Nairobi | 53-71 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| A Guide to Newburyport | 65-86 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| A Guidebook to Dunwich Environs | 47-97 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| A Guidebook to Innsmouth and Environs | 24-72 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| A Guidebook to Innsmouth and Environs | 21-67 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Guidebook to Kingsport and Environs | 10-54 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Guman Thong | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Guns Against Cthulhu | 14-16 | Different Worlds | 19 | Feb 1982 | Chaosium | Call of Cthulhu (Classic) | |
| Guns Don't Kill People, Shoggoths Do | | Dagon | 13 | Jun 1986 | Self Published | Call of Cthulhu (Classic) | |
| Guns in Call of Cthulhu | 16-17 | Dagon | 15 | Nov 1986 | Self Published | Call of Cthulhu (Classic) | |
| Guruvilu | Sep 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| H P Lovecraft in Call of Cthulhu | 24-25 | Different Worlds | 28 | Apr 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Hachishakusama | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Haita the Shepherd | 1-6 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Haita the Shepherd | 2-7 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Hak Zealey III: A CoC NPC | | Chaosium Digest | v10n02 | Apr 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Halcyon Days | 3-11 | Halcyon Days | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1925 |
| The Half Moon | 133-158 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | New York; June; 1923 |
| The Hall School | 18-26 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Halloween 1923 | | Chaosium Digest | v28n11 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) | Halloween; 1923 |
| Halloween at St Odilo's | 34-59 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Halloween |
| Halloween Freakshow | | Cthulhu Maps - Halloween Freakshow | | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Halloween Goblins | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Halloween in Dunwich | 17-37 | Halloween Horror | CHA0326 | 2005 | Chaosium | Call of Cthulhu (Classic) | Dunwich; 1920s; Halloween |
| Halloween in Dunwich | 19-48 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Dunwich; Halloween |
| Halloween in Dunwich | | The Lovecraft Country Holiday Collection | GGP | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Dunwich; Halloween |
| The Halloween Man | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Halloween Nuit | 45-56 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1929; Halloween |
| Halls of Celaeno | 66-68 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Celaeno; 1929 |
| The Halls of Celaeno | 71-76 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Celaeno; 1929 |
| Halls of Celaeno | 86-88 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Celaeno; 1929 |
| Hammer and Stake | 21-24 | Dragon | 162 | Oct 1990 | TSR | Call of Cthulhu (Classic) | |
| The Hand of Abyzou | 166-196 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland; Serpentman |
| Hand of Glory | | Hand of Glory | | Dec 2020 | Chaosium | Call of Cthulhu (Classic) | England |
| The Hand of Y'golonac | 22-23 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Handguns | 35-61 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Hands | Sep 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Hands of Nyarlathotep | | Hands of Nyarlathotep | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | |
| A Happy Accident | 4 | Serendipity's Circle | 1 | Jan 1995 | Self Published | Call of Cthulhu (Classic) | |
| A Happy Family | 6-20 | Adventures in Arkham Country | CHA2342 | 1993 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; Byakhee |
| Happy New Year 2022 | | Cthulhu Maps - Happy New Year 2022 | | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Happy? | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Harami | 115-128 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Harbor-Master | 3-23 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| A Hard Act to Follow | 56-57 | White Dwarf | 91 | Jul 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| Hardware #1: Firearms | | Timeout | 17 | | Self Published | Call of Cthulhu (Classic) | |
| Harlem (K)nights | 141-173 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | New York; 1920s |
| Harlem Hellfighters Never Die | 115-139 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | New York; 1920s |
| Harlem Hellfighters Never Die | 105-132 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Harlem Herself | 23-33 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | |
| Harlem Herself | 73-88 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| A Harlem Speakeasy | | Cthulhu Maps - A Harlem Speakeasy | 092 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Harlem Stride | 25-32 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Harlem Timeline | 20-21 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Harlemites | 35-55 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Harlemites | 33-40 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Harlotville Horror | | The Harlotville Horror | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | New Mexico; 1929 |
| Harsh Words | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Harvest from Beyond: The Seeds and Growth | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Harvester of Dreams | | Chaosium Digest | v28n03 | May 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Hatching Rocks | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Hatching Rocks | 12 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Hatching Rocks | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Haunted | 1-27 | The Haunted | | 2010 | Self Published | Call of Cthulhu (Classic) | Maryland; 1920s |
| Haunted Horror | 103-114 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunted House | 95-119 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunted House | A:81-83 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunted House | 84-86 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunted House | B:74-76 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunted House | | The Haunted House | | Feb 2024 | Xapur RPG | Call of Cthulhu (Classic) | |
| The Haunted House | 91-93 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Haunted House Encounters | 1 | Haunted House Encounters | | Oct 2024 | Chaos Gen | Call of Cthulhu (Classic) | |
| The Haunted Place | | The Haunted Place | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | Providence; 1925 |
| The Haunted Swamp | | The Haunted Swamp | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Australia; 1920s |
| The Haunter | 1-14 | The Haunter | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | Maryland |
| The Haunter of the Dark | 49-68 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Haunters of the Dark | 6-8 | White Dwarf | 67 | Jul 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| The Haunting | 220-225 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunting | 250-255 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunting | 169-174 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunting | 18-31 | Call of Cthulhu 7th Edition Quick Start | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920 |
| The Haunting | 250-255 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting | 250-255 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting | 250-255 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting (The Corbitt House) Maps | | Maps for The Haunting (The Corbitt House) | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting 7E Handout Pack | | The Haunting 7E Handout Pack | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting Handouts | | The Haunting Handout Pack | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting Handouts Revised | 1-12 | The Haunting Handouts Revised | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting of Mill Towers | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Haunting of Millebrand Manor | | The Haunting of Millebrand Manor | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | New York State; 1925; August |
| Haunting of the Silverton | 1-23 | Haunting of the Silverton | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Colorado; 1922 |
| The Haunting of Uthnor | 211-217 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Haunting, a Retelling | 34-38 | Call of Cthulhu 7th Edition Quick Start | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Have Gun, Will Trample | Feb 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Texas |
| Haven't We Met Before? | 1:18 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Hazardous Cargo | 14-24 | Adventures Unlimited | 4 | Win 1995 | Bootstrap Press | Call of Cthulhu (Classic) | 1920s |
| Headaches | 39 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Headaches | 24-25 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Headaches | 1993 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Headcutter Jack | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Headless Horseman | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Headless Lady in Topclass Bar | 0:54 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Headless Therapist | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Headless Valleys | | Headless Valleys | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Alaska; 1920s |
| Healing Herbs | 29-38 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| The Heart of Bois Mort | 4-36 | The Heart of Bois Mort | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | Louisiana; Summer; 1927 |
| The Heart of the Dark | 32-37 | White Dwarf | 75 | Mar 1986 | Games Workshop | Call of Cthulhu (Classic) | London; April; 1920s |
| Heart of the Music | | Heart of the Music | | Aug 2023 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1920s |
| The Heart of the World | 303-324 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | India; 1920s |
| Hearth of the Immortals | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Heartless Things | 106-115 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| The Heat | | The Heat | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Summer; 1921 |
| The Heat Heist of London | 4-19 | The Heat Heist of London | | Jun 2020 | Chaosium | Call of Cthulhu (Classic) | London; December; 1920 |
| The Heat on the Streets | 6-13 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | 1920s |
| Heaven Help Us! | 10-12 | Australian Realms | 2 | Jul 1988 | Australian Realms | Call of Cthulhu (Classic) | |
| Heed the Kraken's Call | 226-254 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland; Glaaki |
| Heinrich's Call of Cthulhu Guide to Character Creation | | Heinrich's Call of Cthulhu Guide to Character Creation | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Heir of the White King | 3-11 | Heir of the White King | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | New England; 1922; March |
| The Heirophants | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Heist | Jun 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | United Kingdom |
| Heliowall | 89-96 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | London; 1929; July |
| Hell's Kitchen | 376-378 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| Hell's Kitchen | 488-490 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| The Hellfire Club | | Chaosium Digest | v17n04 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | Ireland |
| The Hellfire Club | 41 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Ireland |
| The Hellfire Club | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Ireland |
| Hellfire Hound | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Hellgrammite | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Hellhound | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Helmsdon Monster | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1913 |
| The Helmsdon Monster | 15-16 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England; 1913 |
| The Helmsdon Monster | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England; 1913 |
| Help Wanted | | Help Wanted | cr6201 | 2018 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham; Nyogtha |
| The Henderson Interviews | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Her Mother?s Fur by Rebecca L. Brown Moonburn | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Herald Quartet | 5-26 | Forgotten Symphony | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1924; Autumn |
| Herbert West in Love | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Herbert West-Reanimated | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Herbert West-Reanimator | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Herbert West-Reincarnated | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Heretics | 138-185 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | Mexico; 1925; January |
| The Heretics | 12-13 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| The Hermetic Order of the Silver Twilight | 4-13 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Boston; 1924 |
| The Hermetic Order of the Silver Twilight | 7-27 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Boston; 1924 |
| The Hermetic Order of the Silver Twilight | 4-13 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Boston; 1924 |
| The Heroes | 13-26 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Hidden Lore in CoC Supplements | | Chaosium Digest | v04n02 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Hidden Passage | 6-7 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Hidden Within | | Hidden Within | | Jun 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Hidebehind | Nov 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hideous Hermit of Horror | 182-183 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Hiding a Cultist Among Your Players | | Chaosium Digest | v22n12 | Jan 1998 | Chaosium | Call of Cthulhu (Classic) | |
| High and Dry | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| High Fashion | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| High Octane | 108-128 | Atomic-Age Cthulhu | CHA23122 | 2013 | Chaosium | Call of Cthulhu (Classic) | California; 1957; Lesser Race |
| High Societies, Low Peoples: Cults, Groups and Individuals | 72-88 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| High Water | 1-17 | High Water | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | Arkansas; March; 1927 |
| Higher Than Truth | 77-100 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | Iceland |
| The Highlands | 76-105 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Highway to Hell | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hillgrove Horror | 5-22 | Strange Tales of Dread & Wonder #1 | CHA0329 | 2006 | Chaosium | Call of Cthulhu (Classic) | Mi-Go; Dark Young of Shub-Niggurath |
| The Hills Rise Wild | 103-115 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | Dunwich; 1920s |
| The Hills Rise Wild | 152-165 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | Dunwich; 1920s |
| The Hillston Lights | 1 | Tuesday Terribles | 3 | Sep 2007 | Chaosium | Call of Cthulhu (Classic) | Colorado |
| His Master's Voice | 3-21 | His Master's Voice | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1925; September |
| His Pleasant Dream was Shattered | 44-53 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| His Wildest Dreams | 17-28 | The Unbound Book | 0 | Aug 2002 | Unbound Publishing | Call of Cthulhu (Classic) | Kingsport; January; 1925; Leng Spider |
| Historic Timelines | 204-213 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Historical Timeline | 87-94 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| History | 7-18 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | |
| History | 21-22 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| History and Chronology of the Book of Eibon | 3-8 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| History and Legends | 3-11 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| History of Arkham | 16-19 | The Compact Arkham Unveiled | CHA2356 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| History of Arkham | 36-40 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| History of Kingsport | 23-26 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| History of New Orleans | 1-11 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| History of New Orleans | 1-11 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| History of New York | 13-31 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| History of San Francisco | 7-17 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| History of the Cthulhu Cult | 11-36 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The History of the Morgan Family | 8-1 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| History of the Necronomicon | 239-241 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| History of the Necronomicon | 361-366 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| History of Tibet | 6-12 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Hit Locations | 53-57 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Hit Points, Wounds, and Healing | B:20-21 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Hit Points, Wounds, and Healing | B:20-21 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Hoarder of the Unspoken Word | Oct 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Hobo Quest | 67-91 | Cthulhu Masters Tournament 2005 | CHA0323 | 2005 | Chaosium | Call of Cthulhu (Classic) | November; 1921; Insect from Shaggai |
| Hockomock Hounds | 116-134 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Hocus Pocus | | Hocus Pocus | | May 2018 | Chaosium | Call of Cthulhu (Classic) | New York |
| The Hole | Feb 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hole | | The Hole | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | |
| A Hole in Time | | Chaosium Digest | v20n01 | Jun 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Hollowed | Jan 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Holyrood Hunt | | The Holyrood Hunt | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1923 |
| Home, Sweet Home | 73-107 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| Homecoming | | Serendipity's Circle | 17 | | Self Published | Call of Cthulhu (Classic) | Ohio; 1925; Autumn |
| Homecoming | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Ohio; Autumn; 1925 |
| Homeless Spirit | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Homicide | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Homunculus | 14-15 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Classic) | |
| Honey, I'm Home | | George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) | |
| Honeymoon in Hell | 75-86 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Florida; 1940s; Psycopath |
| The Hook | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Hooper's Pond and the Old Brick Powderhouse | 12-17 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Hope | 2-25 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1924; Halloween |
| The Hopeful | 100-122 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Arkham; Deep One |
| The Hopkinsville Goblins | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Horrible Lonely House in the Woods | 63-83 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | Maine; 1920s |
| The Horrible Secret of Monhegan Island | 3-30 | The Horrible Secret of Monhegan Island | 701 | 1984 | Grenadier Games | Call of Cthulhu (Classic) | Maine; 1920s |
| Horrific Routes in Role-gaming | 41 | The Adventurer | 3 | Aug 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Horror | 71-74 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Horror at Right Hook | | The Horror at Right Hook | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | New York; January; 1928 |
| The Horror at the Museum | | The Horror at the Museum | | Apr 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Horror at the Witches Hollow Part 1 | | Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Horror at the Witches Hollow Part 2 | 10-19 | Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic) | |
| The Horror at the Witches Hollow Part 3 | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic) | |
| The Horror from the Shed | | The Blasphemous Tome | 1 | Mar 2016 | Self Published | Call of Cthulhu (Classic) | |
| Horror in the Asylum | 128-150 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | 1925 |
| The Horror in the Bibliography | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | |
| Horror in the Highlands | 3-19 | Horror in the Highlands | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Scotland; February; 1923 |
| The Horror in the Mine | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| The Horror in the Mine | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; January; 1920; Ghast |
| Horror in the Skies | 12-? | Polyhedron UK | 4 | Mar 1999 | TSR | Call of Cthulhu (Classic) | 1920s |
| Horror in the Trenches | | Cthulhu Maps - Horror in the Trenches | 087 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Horror Man | 42-43 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Horror of Fang Rock | 35 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Wales |
| The Horror of Fang Rock | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Wales |
| The Horror of Halloran House | 1-8 | The Horror of Halloran House | | 2009 | Self Published | Call of Cthulhu (Classic) | Massachusetts |
| The Horror of Paris | | Timeout | 16 | | Self Published | Call of Cthulhu (Classic) | Paris |
| Horror of the Centuries | 64-68 | Challenge | 76 | 1995 | Games Designers Workshop | Call of Cthulhu (Classic) | Libya |
| The Horror of the Glen | 44-56 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | Scotland |
| Horror of the Heights | Jun 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Horror on Haldon Hill | 2-15 | The Horror on Haldon Hill | | 1998 | Self Published | Call of Cthulhu (Classic) | England; 1924; November |
| The Horror on Old Hill | 8-16 | Adventure Gaming | 11 | 1982 | Manzakk Publishing | Call of Cthulhu (Classic) | Arkham; 1920; Nyarlathotep |
| Horror on the Borderlands | 60-64 | Challenge | 56 | Jan 1992 | Games Designers Workshop | Call of Cthulhu (Classic) | Ireland; Lesser Race |
| Horror on the Buffalo River | | Horror on the Buffalo River | | 2020 | Chaosium | Call of Cthulhu (Classic) | Arkansas; July; 1923 |
| The Horror on the Freighter | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Horror on the Orient Express | | Cthulhu Maps - Horror on the Orient Express | | Jul 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| Horror on the Orient Express and Masks of Nyarlathotep conversion for d20 | 99-117 | RPG Review | 13,14 | Dec 2011 | Self Published | Call of Cthulhu (Classic) | |
| Horror on the Orient Express Keeper Screen | | Horror on the Orient Express Keeper Screen | CHA23144 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Horror Out of Partridgeville | 80-84 | Challenge | 46 | Oct 1990 | Games Designers Workshop | Call of Cthulhu (Classic) | Arkham; September; 1920; Space Eater |
| Horror Planet | 119-136 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Alien Planet; Alien |
| Horror Scenario Generation | | Chaosium Digest | v05n06 | Jan 1994 | Chaosium | Call of Cthulhu (Classic) | |
| The Horror Show | 166-176 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Horror Stories from the Red Room | 16-32 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Classic) | San Francisco; Halloween |
| The Horror Strikes | 1:23 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Horror, The Horror | 13-14 | Cryptych | 2 | Sep 1993 | ILM International | Call of Cthulhu (Classic) | |
| Horrors from Yuggoth | 2-31 | Age of Cthulhu Vol. IV: Horrors from Yuggoth | 7004 | 2010 | Goodman Games | Call of Cthulhu (Classic) | Norway; 1928 |
| The Horse of the Invisible | 22-26 | White Dwarf | 66 | Jun 1985 | Games Workshop | Call of Cthulhu (Classic) | England |
| Horticus Rising | 112 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Horton, Sir James | 18-21 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Hospital Island | 2-18 | Hospital Island | | May 2024 | Chaosium | Call of Cthulhu (Classic) | United Kingdom; 1930s |
| Hospitals, Care | 65-66 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| An Hostel on the Beach | | Cthulhu Maps - An Hostel on the Beach | 020 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Hound of Fate | | Hound of Fate | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Hounded by the Night | May 2012 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hounds of Salem | | The Hounds of Salem | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Winter; 1923 |
| A House Beyond Time and Space | 1-4 | A House Beyond Time and Space | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A House in London | | Cthulhu Maps - A House in London | 061 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The House in the Woods | 32-41 | The Horrible Secret of Monhegan Island | 701 | 1984 | Grenadier Games | Call of Cthulhu (Classic) | Maine; 1924; June |
| House of an Artist | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| House of Fun | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| House of Hunger | 34-35 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| House of Hunger | 36-38 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The House of Memphis | 103-142 | Mansions of Madness Volume 1: Behind Closed Doors | CHA23167 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| House of Pain | | House of Pain | SKP0704 | 2008 | Skirmisher Publishing | Call of Cthulhu (Classic) | England; Autumn; 1991 |
| The House of Seven Gables | | The House of Seven Gables | | Jun 2024 | Chaosium | Call of Cthulhu (Classic) | |
| House of the Fathers | Mar 1997 | The People of Innsmouth | 21 | | Self Published | Call of Cthulhu (Classic) | New England |
| The House of Yellow Buck Mountain | 25-36 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1925 |
| The House on McKinley Boulevard | 29-42 | Last Rites | CHA2379 | 1999 | Chaosium | Call of Cthulhu (Classic) | Boston; 1990s |
| The House on Old Main Road | | Chaosium Digest | v15n01 | Jun 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The House on Stratford Lane | 32-47 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Connecticut; 1920s; May; Mi-Go |
| The House on Stratford Lane | 10-21 | Of Keys and Gates | PAG2101 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Connecticut; May; 1920s; Mi-Go |
| The House on Stratford Lane | 51-63 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | Connecticut; 1920s; May; Mi-Go |
| The House on Stratford Lane | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | Connecticut; May; 1920s; Mi-Go |
| A House on the Cliff | | Cthulhu Maps - A House on the Cliff | 043 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The House on the Edge | 58-67 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Nodens |
| The House on the Edge | 92-102 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | Kingsport; Nodens |
| The House on the Hill | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The House with Two Sides | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| How Cults Work | 61-62 | The Adventurer | 3 | Aug 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| How I Learned to Stop Worrying and Love the Setting | | The Blasphemous Tome | 8 | Dec 2021 | Self Published | Call of Cthulhu (Classic) | |
| How to be a Cultist | 66 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| How to Haunt a House | 59-66 | This Old Haunted House, Too | CHA0373 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| How to Play | 6 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| How to Play the Game | A:75-80 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| How to Play the Game | 80-83 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| How to Play the Game | B:70-73 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| How to use Music in Horror Gaming | | Ye Booke of Tentacles | 4 | 2003 | The Chaos Society | Call of Cthulhu (Classic) | |
| How to Use the Guide | 7-16 | Heinrich's Call of Cthulhu Guide to Carosa | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Howard Phillips Lovecraft | 104-107 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Howard Phillips Lovecraft | 115-119 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Howard Phillips Lovecraft | 22-27 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Howard Phillips Lovecraft | 186-187 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Howard Phillips Lovecraft | 22-27 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Howl of Hastur, Fantasy Role-Playing in the Worlds of August Derleth | | Dagon | 27 | Jun 1990 | Self Published | Call of Cthulhu (Classic) | |
| The Howler in the Dark | 37-61 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Howler in the Dark | 54-89 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Hubert's Fine Arts | 39-48 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| The Huhuotl | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Human De-Evolution: A Mythos Tome | | Chaosium Digest | v07n02 | Aug 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Humanspawns | | Humanspawns | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Hung by the Chimney With Care | 2-12 | Hung by the Chimney With Care | | 2021 | Petersen Games | Call of Cthulhu (Classic) | Midwest; December; 1920s |
| A Hunger Akin to Lunacy | | A Hunger Akin to Lunacy | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Michigan; Autumn; 1925 |
| The Hunger of Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hungry Woods | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Hunt | 99-136 | The Order of the Stone | CHA23160 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Hunter and Hunted | | Hunter and Hunted | | Sep 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Hunter Out of Time | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Vermont; February; 1922; Great Race of Yith |
| The Hunters from Beyond | 25-43 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Hunters' Bridge | 5-25 | Blackthorn Bridge Club: Hunters Bridge | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | New York State; 1926; July |
| The Hunting of Philip Ackroyd | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Hunting Pink | | Chaosium Digest | v22n11 | Dec 1997 | Chaosium | Call of Cthulhu (Classic) | England |
| Hunting Pink | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Hutchin's Cave | F:1-9 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; Summer; 1922 |
| Hyde's New Face | Feb 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Hymnal of the Esoteric Order of Dagon | 32-34 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| I Am Not Dead Yet! | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| I See a Bird. No Wait ? a Byakhee | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| I Was a PC Detective, or Can You Find Cthulhu in Three Easy Lessons (If That's Your Idea of a Good T | 1, 22-23 | Game's Afoot | 9 | 1992 | Zirlinson Publications | Call of Cthulhu (Classic) | |
| I, Nyarlathotep | | I, Nyarlathotep | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Ice Maiden | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Iceland | 126-151 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Iceland; 1930s; Voormis; Serpentman |
| Icky Ichor of the Beast | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Iconodule | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Icosahedron - A History | 76-77 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | |
| The Idol | 190-204 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Idol of Thoth | | The Idol of Thoth | | Dec 2017 | Stygian Fox | Call of Cthulhu (Classic) | Boston; 1925; February |
| The Idol of Todzth-Aeod | 42-52 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Idols | 57-58 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Ill Omens Art Pack | | Ill Omens Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| An Ill Wind | 7-13 | An Ill Wind | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | Providence; 1931; March; Arwassa |
| The Ill-Made Knight | | The Once and Future King | | 1999 | Self Published | Call of Cthulhu (Classic) | |
| Illuminated | Dec 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Illuminated Order | 41-46 | Abyss Quarterly | 51 | 1993 | Ragnarok Games | Call of Cthulhu (Classic) | London; 1890 |
| Illuminating Manuscripts: The G?harne Fragments | 19-22 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | |
| The Ilsley Variant | 37-48 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Classic) | Arkham; Halloween; 1920s |
| Ilycladian Worm | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Images of Doom | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Immunized | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Imperfects | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Impossible Barber | | The Blasphemous Tome | 5.5 | Aug 2020 | Self Published | Call of Cthulhu (Classic) | |
| An Impossible Murder | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| In a City of Bells and Towers | C:121-129 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Croatia; 1923 |
| In a City of Bells and Towers | C:117-130 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Croatia; 1923 |
| In a City of Bells and Towers | | Dagon | 22,23 | Sep 1988 | Self Published | Call of Cthulhu (Classic) | Croatia; 1923 |
| In a City of Bells and Towers | B:97-108 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Croatia; 1923 |
| In a Different Light | 1-34 | In a Different Light | cr3001 | 2011 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham; Spring; 1928 |
| In A Different Light, Part 1 | | Chaosium Digest | v29n12 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; Spring; 1928 |
| In A Different Light, Part 2 | | Chaosium Digest | v30n01 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; Spring; 1928 |
| In A Different Light, Part 3 | | Chaosium Digest | v30n02 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928; Spring |
| In A Different Light, Part 4 | | Chaosium Digest | v30n03 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; Spring; 1928 |
| In A Different Light, Part 5 | | Chaosium Digest | v30n04 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) | Arkham; Spring; 1928 |
| In a Timely Manor | | In a Timely Manor | | Jan 2026 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| In and Out of the Academic World | 64-67 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| In Fabulous Color! | | In Fabulous Color! | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1930s |
| In From the Cold | | In From the Cold | | 2017 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| In Media Res | 146-161 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Missouri; 1993; Summer |
| In Memoriam | | In Memoriam | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | Kingsport |
| In Nomine Diabolis | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| In Rerum Supernatura | 108-113 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| In Rerum Supernatura | 189-192 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| In The Beginning | 16-25 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| In The Cards | Oct 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| In the Clutches of Mami Wata | 59-72 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| In the Forests, the Shadows | | Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | |
| In the Forests, The Shadows | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| In the Grip of Madness | 27-34 | Worlds of Cthulhu | 2 | Feb 2005 | Pegasus Press | Call of Cthulhu (Classic) | |
| In The Orient Express I | | Cthulhu Maps - In The Orient Express I | 093 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| In The Orient Express II | | Cthulhu Maps - In The Orient Express II | 094 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| In the Same Boat | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| In the Shadow of the Horns | | In the Shadow of the Horns | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| In the Shadows of Death | 24-39 | In the Shadows | CHA2357 | 1995 | Chaosium | Call of Cthulhu (Classic) | Louisiana; 1927 |
| In the Vale of Pnath | 199-204 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| In the Watches of the Night | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| In the Waters of Wyman | 8-23 | White Wolf | 4 | Oct 1986 | White Wolf Games | Call of Cthulhu (Classic) | New England; 1920s |
| In Whom We Trust | 2016 | Four Letters At Random | | | Self Published | Call of Cthulhu (Classic) | Brazil |
| Inca Unconquered | 1998 | Ubar | | | Self Published | Call of Cthulhu (Classic) | Peru; 1920s |
| Incident in Iraq | 171-180 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Iraq; 1931 |
| Inclusivity | 11-12 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| An Inconvenience to Travellers | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Incredible Incunabula: Fifty Works of Arcane and Forgotten Lore for Call of Cthulhu | 44-47 | Space Gamer | 86 | Jul 1989 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| The Incubus of Atlantis | 380-386 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Indiana Jones for CoC | | Chaosium Digest | v23n02 | Feb 1998 | Chaosium | Call of Cthulhu (Classic) | |
| An Industrial Harbor | | Cthulhu Maps - An Industrial Harbor | 017 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Infernal Star | 172-? | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Infestation | 1997 | Ubar | | | Self Published | Call of Cthulhu (Classic) | Los Angeles |
| Infestation | | Infestation | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Infested Pumpkin | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Inhabitant of Carcosa | 7-10 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| An Inhabitant of Carcosa | 8-13 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Inheritance | 33-43 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Classic) | Connecticut; June; 1922 |
| Inheritance | | Inheritance | | 2019 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1925 |
| Inheritance | 1-29 | Inheritance | FS03 | 2007 | Self Published | Call of Cthulhu (Classic) | New York State; 2271; October |
| The Inheritor | 5-28 | The Thing at the Threshold | CHA2339 | 1992 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1927 |
| Ink and Blood | Feb 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Arkham; March; 1934 |
| Ink Man | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Inland Waterways | 37 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| An Inner Call | | An Inner Call | | Sep 2020 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| An Inner Call | 113-130 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Inner Light | | The Inner Light | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | 1920s; Cthugha |
| The Innocents | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Innsmouth Connection | 31-43 | Before the Fall | CHA2377 | 1998 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s; Shoggoth |
| Innsmouth Curios | 46-52 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Innsmouth Gold | 53-61 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Innsmouth Gold | 142-164 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Innsmouth Handouts | | Innsmouth Handout Pack | | 2021 | base113 Games | Call of Cthulhu (Classic) | |
| Innsmouth Harbor | | Cthulhu Maps - Innsmouth Harbor | 025 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Innsmouth Head | 125-141 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Innsmouth Independence Day | 133-178 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Innsmouth; July |
| Innsmouth Independence Day | | The Lovecraft Country Holiday Collection | GGP | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Innsmouth; July |
| Innsmouth Maps | | Innsmouth Poster Maps | | 2015 | Lore Wise Games | Call of Cthulhu (Classic) | |
| The Innsmouth Terror | 1-28 | The Innsmouth Terror | | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1923 |
| Innsmouth's Burying Grounds | 9-15 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Insanitarium | | Insanitarium | | 2019 | Chaosium | Call of Cthulhu (Classic) | Michigan; 1925 |
| Insanity, Society and the Law | 43-50 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Inscrutable | 82-95 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Insects from Shaggai | | Tradetalk | 11 | 2002 | The Chaos Society | Call of Cthulhu (Classic) | |
| Insta-Plots | 133-134 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Inter Solar System Species Index | | Chaosium Digest | v07n07 | Sep 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Interim Period 1930-1931 | 51 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Interim Period 1933-1934 | 83 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Interim Period 1936-1939 | 107 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Into a Dark Heart | | Into a Dark Heart | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo |
| Into the Darkness | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Into the Darkness | 31-32 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Into the Darkness | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Into the Gothic | | Into the Gothic | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Into the Moonlight | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Into the Realm of the Wind-Walker | 59-72 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Canada; Alaska; 1929; June |
| Into the Throat of the Beast | 7-27 | The Arkham Evil | T-1 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Pennsylvania; March; 1919 |
| Into the Wilds, Into the Depths | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| Introducing Call of Cthulhu Adventures | | Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 4-23 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Introduction | 5-9 | Horror's Heart | CHA2359 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 4-19 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 23-35 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 24-34 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 12-19 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 7-46 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 10-17 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 4 | Call of Cthulhu 7th Edition Quick Start | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 4-7 | Flotsam and Jetsam: Introduction | | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 7-13 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | |
| Introduction | 3-4 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 3-9 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 7-16 | The Order of the Stone | CHA23160 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 9-10 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 4-11 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | | Flotsam and Jetsam: Introduction and the Star Brothers | | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 12-19 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 7-12 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction | 5-8 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Introduction | 5-13 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction and Considerations | 2-9 | Sun Spots | 4 | 2017 | Weird 8 | Call of Cthulhu (Classic) | |
| Introduction and Orientation | 8-18 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| An Introduction to 1920s Scotland | 5-28 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Introduction to the Book of Dzyan | 12-69 | The Book of Dzyan | CHA6027 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction: Gazing into the Dark Mirror | 2-3 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Introduction: The Storm | 3-12 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| The Intruder Within | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Investigating Postergeists | 33-40 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| The Investigation | 89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Investigation | 45-56 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | |
| Investigator Archetypes for Zgrozy | | Investigators of Horrors! | | Oct 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Investigator Creation | 11-16 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Investigator Organizations | 122-145 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Investigator Passports | 1-6 | Investigator Passports | | 2019 | base113 Games | Call of Cthulhu (Classic), Trail of Cthulhu | |
| Investigator Sheets | | Investigator Sheets | CHA5111 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Investigator's Gazeteer | 58-72 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Investigator's Guide to 1920s New Orleans | 9-26 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Investigators | | Chaosium Digest | v01n04 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Investigators and Skill Progression | | Chaosium Digest | v17n09 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Investigators as Tome Authors | | Chaosium Digest | v23n02 | Feb 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Investigators Kit | | Investigators Kit | CHA5102 | | Chaosium | Call of Cthulhu (Classic) | |
| The Invitation | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Invitation in Yellow | | An Invitation in Yellow | | Feb 2018 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; March; 1920; Byakhee |
| Invitation to the Dance | 19-38 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| The Involuntary Witness | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| Ira Incensa | | Ira Incensa | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Irish Creatures of Legend | 44-50 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Iron | 95-123 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Iron Crib | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Iron Ghost | 17-29 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Irradiated Scavenger | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Is Nothing Sacred | | GM | 18 | Feb 1990 | Croftward Limited | Call of Cthulhu (Classic) | |
| Is This Heaven? | 66, 68 | Shadis | 19.5 | Jun 1995 | Alderac Entertainment Group | Call of Cthulhu (Classic) | |
| The Island | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Dreamlands |
| The Island | 20-21 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Dreamlands |
| The Island | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Dreamlands |
| The Island | | The Island | SKP01110 | 2011 | Skirmisher Publishing | Call of Cthulhu (Classic) | New York State; 1947; Deep One |
| The Island | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Dreamlands |
| The Island | 4-22 | The Island | | Jul 2024 | Chaosium | Call of Cthulhu (Classic) | Portugal; 1925 |
| The Island of Insanity | 5-15 | The Island of Insanity | YH-C-9 | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | Argentina; 1937 |
| The Island of Insanity | 117-126 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| The Island of the Dead | | Chaosium Digest | v05n11 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) | |
| The Islands | 107-135 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Isle of Madness | | Isle of Madness | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1930s |
| The Isles of Shoals and Other Innsmouth Inspiration | 26-30 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Isolated Town | Jul 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| It Started With a Mouse | | It Started With a Mouse | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Australia; 1920s; Mi-Go |
| It Was the Day of the Deep One | 269-? | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The 'It' Girl | 2-5 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| It's Plantlife Jim, but not as we know it, Part 1 | | Chaosium Digest | v38n02 | Nov 2003 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| It's Plantlife Jim, but not as we know it, Part 2 | | Chaosium Digest | v38n03 | Nov 2003 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| It's the End of the World As We Know It | 68-71 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Items | 19-25 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Call of Cthulhu (Classic), Trail of Cthulhu | |
| Itinerant Hotel | | The Itinerant Hotel | | May 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; July; 1922 |
| Jack 'O Lantern | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Jack the Ripper's Knives | 50 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Jacob's Forge | 22-23 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Jailer | Apr 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Jamal | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Japan, Makami Sakura | | Japan, Makami Sakura | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | Japan; 1920s |
| Jars | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Jars | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Jasmine, Avatar of Isis | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Jasper St Jones Got the Prettiest Bones | | Jasper St Jones Got the Prettiest Bones | | Dec 2017 | Tomb Of Nyarlathotep Games | Call of Cthulhu (Classic) | 1920s |
| Jazz Age Newspapers | | Mutable Deceptions Vol 1: Jazz Age Newspapers | cr7001 | 2013 | Cthulhu Reborn | Trail of Cthulhu, Call of Cthulhu (Classic) | |
| Jellyfish Shark | | Jellyfish Shark | | Mar 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Jendick's Swamp | 187-199 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Jenglot | May 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Jenkins Lives! | | Jenkins Lives! | | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Jenny Beckett's Ghost | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Jermyn Horror | 125-179 | The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | England; London; 1920s |
| Jersey Devil | Jul 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Jin Jiang Guest House | 372-375 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| The Jin Jiang Guest House | 484-487 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | China; 1925 |
| Joe's Oddities | | Cthulhu Maps - Joe's Oddities | 118 | Oct 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| John and Janes Dies: The Disassembled | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| John Dee's Necronomicon | 128-129 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| John Dee's Necronomicon | 192-196 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Jonathan H. Bierce Foundation for Anthropological and Archaeological Studies | 6-9 | Opifex Bimonthly | 18 | Mar 1999 | Self Published | Call of Cthulhu (Classic) | |
| The Jonty Scenario, Part One | | Chaosium Digest | v07n10 | Oct 1994 | Chaosium | Call of Cthulhu (Classic) | England; November; 1923 |
| The Jonty Scenario, Part Two | | Chaosium Digest | v07n11 | Oct 1994 | Chaosium | Call of Cthulhu (Classic) | England; 1923; November |
| The Journal of Father Klenner | Dec 2003 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic), Advanced Dungeons and Dragons (Ravenloft) | |
| The Journal of Henry Radcliff | 4-23 | Twilight Memoirs | CHA0325 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Journal of Neve Selcibuc | 2-63 | The Journal of Neve Selcibuc | CB7358 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Journal of Reginald Campbell Thompson | 2-63 | The Journal of Reginald Campbell Thompson | CB7359 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Journey | 279-285 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Europe; 1920s |
| The Journey | 1-7 | The Journey | | 2002 | Self Published | Call of Cthulhu (Classic) | Europe; 1920s |
| The Journey | 7-12 | Opifex Bimonthly | 20 | Jul 1999 | Self Published | Call of Cthulhu (Classic) | Europe; 1920s |
| Judging the Insame: Writing and Running Call of Cthulhu Tournaments | 36-43 | Dagon | 25 | Jun 1989 | Self Published | Call of Cthulhu (Classic) | |
| Junping at Shadows | 26-27 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Just a Tad Beyond Innsmouth | 228-240 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Justin Geoffrey (1905-26) | | Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) | |
| Kabbalistic Magic | 16-22 | Different Worlds | 36 | Sep 1984 | Chaosium | Call of Cthulhu (Classic) | |
| The Kabbalistic Science of Gematria | 150-152 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Kaigun Rikusentai | 522-525 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Kangaroo Route | 3-38 | The Kangaroo Route | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Katachi no Shouyu | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Katajhan's Carpet | 1993 | Four Letters At Random | | | Self Published | Call of Cthulhu (Classic) | |
| Katajhan;s Carpet | 49-51 | The Last Province | 3 | 1993 | Last Province Publishing | Call of Cthulhu (Classic) | |
| Kayboard Music | 47-48 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Ke'ken | Dec 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Keck | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Keeley's Gold | | Keeley's Gold | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Dunwich; 1921 |
| Keeper Group Combat Sheet | | Keeper Group Combat Sheet | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper Protagonist and Antagonist Sheets | | Keeper Protagonist and Antagonist Sheets | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper Reflections: Call of Cthulhu Campaigning | | Keeper Reflections: Call of Cthulhu Campaigning | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper Screen: Harlem Unbound | | Keeper Screen: Harlem Unbound | | 2017 | Darker Hue Studios | Call of Cthulhu (Classic) | |
| Keeper's Bookmark | | Keeper's Kit | CHA5110 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| A Keeper's Comfort | 4-26 | A Keeper's Comfort | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| A Keeper's History of London | B:21-36 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Keeper's Kit | | Keeper's Kit | CHA5108 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Keeper's List of Lists | 59-94 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Lore | 118-131 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Lore | 133-147 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Lore | 71-84 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Lore: Fear is the Key | 15-16 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | |
| Keeper's Notes | 5-9 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | |
| Keeper's Notes: Australia | 318-349 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Australia | 288-300 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Cairo | 228-259 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Cairo | 212-241 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Hong Kong | 463-476 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Hong Kong | 351-365 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Kenya | 272-301 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Kenya | 254-273 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: London | 148-175 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: London | 162-191 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: New York | 86-101 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: New York | 96-111 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Shanghai | 422-462 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Notes: Shanghai | 312-350 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Keeper's Screen | 1-6 | Keeper's Screen | CHA2309 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Screen | 1-4 | Keeper's Screen | CHA2323 | 1988 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Screen | 1-6 | Keeper's Screen | CHA23120 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Screen | 1-2 | Keeper Screen Pack | CHA23137 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Keeper's Screen | | Keeper's Kit | CHA5110 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Keepering | 59-70 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Keeping a la Klein | 26-28 | Dagon | 18,19 | Jul 1987 | Self Published | Call of Cthulhu (Classic) | |
| Keeping Cthulhu: Archaeological Expeditions | 24-25 | Different Worlds | 42 | May 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Keeping the Faith | | Games Review Monthly | 6 | Mar 1989 | Eden Publication | Call of Cthulhu (Classic) | |
| Kenya | 108-133 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1925 |
| Kenya | 121-149 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1925 |
| Kenya | D:1-20 | Masks of Nyarlathotep | CHA2307-X | 1984 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1925 |
| Kenya | 87-106 | Masks of Nyarlathotep | CHA3304 | 1989 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1925 |
| Kenya | 385-448 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1925 |
| The Kenyan Interior | 72-93 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Key | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Key and the Gate | 18-26 | White Wolf | 23 | Oct 1990 | White Wolf Games | Call of Cthulhu (Classic) | Egypt; Arkham; 1927 |
| Keyboard Music | | Chaosium Digest | v18n11 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Keyboard Music | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Keys of Madness: Act I-Key West | 39-58 | Tales of Death & Darkness | CHA0321 | 2005 | Chaosium | Call of Cthulhu (Classic) | Florida; July; 1927; Shoggoth |
| Keys of Madness: Act II-Caya Locura | 59-79 | Tales of Death & Darkness | CHA0321 | 2005 | Chaosium | Call of Cthulhu (Classic) | Florida; July; 1927; Shoggoth |
| Kick Off | 42-44, 46 | Games Master International | 10 | May 1991 | Newsfield | Call of Cthulhu (Classic) | |
| Kick-Off! | 26-30 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Kidneys | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Killer Shrews | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Kindergarten Kult | | Chaosium Digest | v18n10 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Kindergarten Kult | 47 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Kindergarten Kult | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| The King in Yellow | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| King in Yellow in Carcosa | | Cthulhu Maps - King in Yellow in Carcosa | 050 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| King Lycaon | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The King of Chicago | 6-30 | King of Chicago | CHA2348 | 1994 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1931 |
| King of Scabs | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Dunwich |
| King of Scabs, Part 1 | | Chaosium Digest | v33n10 | May 2001 | Chaosium | Call of Cthulhu (Classic) | Dunwich |
| King of Scabs, Part 2 | | Chaosium Digest | v33n11 | May 2001 | Chaosium | Call of Cthulhu (Classic) | Dunwich |
| King's Africal Rifles | 302-304 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Kings Blood | 14-21 | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| A Kingsport Bibliography: Fiction | 109- | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Kingsport Cult | 27-32 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Kingsport Curios | 34-44 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Kingsport's Ghosts | 45-65 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Kirkwood Farnhouse Investigation | | The Kirkwood Farmhouse Investigation | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | Iowa; 1924 |
| Kitab al-Azif | 260-264 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Kitab al-Azif | 242-245 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Kith and Kin | 28-59 | The Realm of Shadows | PAG1006 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; April; 1940; Ghoul |
| The Knjiga Mrtva | 28-30 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Knocking At Hell's Door | 2:17 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Knocking Box | 4-8 | White Wolf | 12 | Oct 1988 | White Wolf Games | Call of Cthulhu (Classic) | 1920s |
| The Krampus | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Krampus | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Kuntilanak | May 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| La Danse de la Folie | 14 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| La Diablesse | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| La Lai Yeh Chi | 551-555 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| La Lai Yeh Chi | 424-428 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| La Llorona | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| La Musique de l'Ennui | 49-64 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| La Recette | | La Recette | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | Louisiana; 1920s |
| The Lady MacBeth | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Lady Vanishes | 1:39 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Lair of Dreams | 2-7 | The Lair of Dreams | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | Paris; 1890s; Hastur |
| The Lair of Lo'thysss | 1-11 | The Lair of Lo'thysss | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | Serpentman |
| Lake Balaton and regions | 21-26 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Lake of Mist | 45-49 | The Adventurer | 10 | May 1987 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | England |
| The Lambton Worm | 62-73 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1920s |
| The Lambton Worm | 55-74 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1920s |
| Lambton Worm | | Lambton Worm | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | England; July; 1936 |
| Land and Landscape of New England | 11-18 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Land of the Rising Dead | 16-28 | The Unbound Book | 2 | Aug 2005 | Unbound Publishing | Call of Cthulhu (Classic) | Japan; 1923 |
| Land of the Rising Dead | 1-21 | Land of the Rising Dead | | 2003 | Self Published | Call of Cthulhu (Classic) | Japan; 1923 |
| Land of the Rising Sun | 312-331 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Land That Time Ignored | 35-42 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1932; Dinosaur |
| Language Skills for CoC | Jan 2002 | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic) | |
| The Lantern Man | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Larrabee, Professor S Erastus | 13-16 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| The Last Bus | Apr 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Last Carriage | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Last Case of Mark Edward Morrison | 6-7 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Last Dawn | 36-41 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Last Leg | 109-114 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; August; 1929 |
| The Last New Year | 4-13 | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| Last Night... | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Last of Joy | 14-17 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Scotland |
| The Last of the Clan McMere | 12-22 | Dagon | 16 | Jan 1987 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Last Rites | 5-16 | Last Rites | CHA2379 | 1999 | Chaosium | Call of Cthulhu (Classic) | 1990s |
| The Last Self-Portrait of Larissa Dolokhov | 72-73 | The Unspeakable Oath | 23 | Aug 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Last Stand at Fat Maybelle's | 115-121 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| Last Stand at Fat Maybelle's | 127-132 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| The Last Supper | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Last Thoughts on AD&D to CoC | | Chaosium Digest | v17n07 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Last Threads of Sanity | 5-27 | Last Threads of Sanity | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| The Last Voyage of the Ivory Pride | 1996 | www.onr.com/user/bturner | | | Self Published | Call of Cthulhu (Classic) | Atlantic Ocean |
| Late Modern (1800-1945) | 39-63 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Latin Course | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Launch | | Cthulhu Maps - The Launch | 088 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Laupher Exposition | | The Laupher Exposition | | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | Brazil; October; 1923 |
| LaVey, Satanism, and the Big Squid | 54-58 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Law and Order | A:103-112 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Law and Order | 61-63 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Law in Black and White | 350-360 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Law in Shanghai and the Shanghai Municipla Police | 366-371 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Law in Shanghai and the Shanghai Municipla Police | 477-483 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Lazy Eye | 56-57 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Zombie |
| The Lazy Man's Guide | | Ye Booke of Tentacles | 4 | 2003 | The Chaos Society | Call of Cthulhu (Classic) | |
| Le Fear Fatal | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Le Lechuza | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Leather on Willow | 39-51 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Leathernecks and Bluejackets | 526-531 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Leewood Collection | 5-8 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Legacies of the Renaissance | 2-64 | Legacies of the Renaissance | CHA0318 | 2005 | Chaosium | Call of Cthulhu (Classic) | Europe; 1928 |
| The Legacy | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Legacy of Acheron | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Legacy of Arthur Nye | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | Louisiana; 1920s |
| The Legacy of Lombard House | 4-60 | The Legacy of Lombard House | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | England; November; 1925 |
| Legacy of the Guru | 70-76 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | Tibet |
| Legends & Celebrities | 97-101 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Legends and Customs | 42-58 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Leprechaun | | The Leprechaun | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; March; 1921 |
| Leptis Magna | | Leptis Magna | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | Libya; 1931 |
| Les Fleurs Du Mal | B:43-57 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Paris; 1923 |
| Les Fleurs Du Mal | B:101-130 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Paris; 1923 |
| Les Fleurs Du Mal | A:143-168 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Paris; 1923 |
| Lesser Evils | 42-48 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Lesser Shepherd/Shepherdess of the Black Goat | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Lessons From Lovecraft for Writers | 23-24 | Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) | |
| Let Me Introduce You? To Our Members | 8-10 | Role Player Independent | 10 | Sep 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | London; 1920s |
| Let Sleeping Dogs Lie | 63-104 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | Singapore; 1920s |
| Let Sleeping Dogs Lie | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| Let the Children Come to Me | 57-75 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | Massachusetts; 1926; August |
| Letalis Scientia | | Chaosium Digest | v28n08 | Aug 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Lethal Legacy | 17-28 | Last Rites | CHA2379 | 1999 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1990s; Dimensional Shambler |
| Letters and Notes | 1-23 | Letters and Notes | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Letters From a Foreign Land | 58-63, 66-68 | White Dwarf | 93 | Sep 1987 | Games Workshop | Call of Cthulhu (Classic), MERP, Warhammer Fantasy Roleplay | Europe |
| The Lexi Sakra | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Ley of the Land | 58-62 | White Dwarf | 90 | Jun 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| Lhasa | 93-119 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Lhauggoglug | Jan 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Liber Ivonis | 220-223 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Liber Ivonis | 204-206 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Liberation | 225-268 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | Tibet; 1920s |
| Libraries and Their Use | A:92-93 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Libraries and Their Use | 186-187 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Libraries and Their Use | B:88 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| The Library and Exhibit Museum | 15-22 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Library Archetypes | 5-16 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Library of Celaeno | | Cthulhu Maps - The Library of Celaeno | 077 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Lie In Wait | | Lie In Wait | | Feb 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920s |
| The Life and Legacy of Ivan the Terrible | 10-12 | Different Worlds | 45 | Mar 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Life as a God | 139-143 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Life as a God | 131-134 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Life as an Investigator | 146-159 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Life in the Fire | 89-156 | Through a Glass Darkly | | 2011 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Life of Eibon According to Cyron of Varaad | 9-19 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Life of the Master | 242-254 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Life of the Master | 416-433 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Life Reflects Art | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Light at the End | 3-10 | The Light at the End | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1925 |
| The Light from the Pole | 115-129 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Light My Way Home | | Light My Way Home | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | England; 1919 |
| The Lighthouse | | Chaosium Digest | v29n10 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Lighthouse | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | 1920s |
| The Lightless Beacon | 6-23 | The Lightless Beacon | CHA | 2019 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; April; 1926 |
| The Lightless Beacon Maps | | Maps for The Lightless Beacon | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Lightning Bug | 1996 | gwthomas.org | | | Self Published | Call of Cthulhu (Classic) | Insect from Shaggai |
| Lightning Vampires | Mar 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Lights of Madness | M1-M6 | Different Worlds | 45 | Mar 1987 | Chaosium | Call of Cthulhu (Classic) | Pennsylvania; 1920 |
| Lillian St John | 40-41 | RPG Review | 17 | Sep 2012 | Self Published | Call of Cthulhu (Classic) | |
| Line 4 | | Line 4 | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | Halloween |
| Lingua Morbo | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Lion Kills Tonight | Dec 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Lions and Tigers and Bears, etc. | 18-19 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| The List | 78-88 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; July; 1929 |
| The List of Historical and Fictional Figures Statted for Call of Cthulhu | 7-48 | The List of Historical and Fictional Figures Statted for Call of Cthulhu | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Lithomancy in Call of Cthulhu | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | |
| Little Cottage in the Wood | C:130-145 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Serbia; 1923 |
| Little Cottage in the Wood | C:203-239 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Serbia; 1923 |
| Little Cottage in the Wood | B:167-196 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Serbia; 1923 |
| Little Death | 31 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Little Death | | Chaosium Digest | v09n12 | Mar 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Little Death | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Little Death | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Little Knowledge | 94-102 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | Arkham; May; 1928 |
| A Little Knowledge | 214-225 | Miskatonic University | CHA2389 | 2005 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928; May |
| A Little Local Knowledge | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| Little Miracles | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Little Mouth | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Little One | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Little People | 2-23 | Keeper's Kit | CHA5110 | 1992 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| A Little Restaurant | | Cthulhu Maps - A Little Restaurant | 113 | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Little Slices of Death | 272-283 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | Chicago |
| A Little Thing | 1-12 | A Little Thing | | 2005 | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1990s; Mi-Go |
| Live Bait | 189-205 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Living Al Azif | Jul 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Living Bones | | Living Bones | | 2006 | ADP Systems | Call of Cthulhu (Classic) | England; 1925 |
| Living Secrets | | Living Secrets | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Livre d'Ivon | 421-423 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Livre d'Ivon | 548-550 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Lo and Behold | 1-33 | Lo and Behold | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | Boston; July; 1927 |
| A Lobster Factory | | Cthulhu Maps - A Lobster Factory | 021 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Locales | 24-40 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Locations in Greater Arkham | 3-8 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Locations in Greater Innsmouth | 3-4 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Loch Ness | | Chaosium Digest | v36n06 | Jun 2002 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1929 |
| The Locket | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Log of the Narwhal | | The Log of the Narwhal | | 2007 | Self Published | Call of Cthulhu (Classic) | 1923 |
| Loki's Gift | 191-232 | Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) | London; 1896; Cthulhu |
| London | 42-71 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| London | 47-79 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| London | B:1-28 | Masks of Nyarlathotep | CHA2307-X | 1984 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| London | 27-54 | Masks of Nyarlathotep | CHA3304 | 1989 | Chaosium | Call of Cthulhu (Classic) | London; 1925 |
| London Calling | 43-52 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | London; November; 1928 |
| A London Chronology | 78-79 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The London Guide | A:116-179 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| London in the 1920s | A:5-18 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Lonely Point Lighthouse | 76-94 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | Connecticut; March; 1926; Deep One |
| The Lonely Road | 33-65 | Protodimension | 9 | Sum 2011 | Kinstaff Media | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| A Lonely Thread | 13-36 | No Time To Scream | CHA23185 | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1930s |
| Long Arm of the Law | 30-37 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Long Way From Home | 203-256 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | Australia; Shoggoth |
| The Longest Night | 3-16 | The Longest Night | | Dec 2019 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923; May |
| Look to the Future | 13-17 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | New York; 1924 |
| Look to the Future | 28-39 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | New York; 1924 |
| Look to the Future | 13-17 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | New York; 1924 |
| The Looking Glass | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Lord Arthur Godalming's Crime | 31-38 | Role Player Independent | 3 | Feb 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | Arkham; 1890s; Vampire |
| Lord Arthur Godalming's Crime | 21-? | PerChance | 7 | Dec 1991 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | Arkham; 1890s |
| The Lord of the Yellow Sign | 8,11 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Lords By Birthright | | Lords By Birthright | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Lords by Birthright | 75-94 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Los Hobos and the Wolves of Carcosa | | Los Hobos and the Wolves of Carcosa | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | Mexico; February; 1935 |
| Losing Sanity | 6-7 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Losing Your Marbles in Call of Cthulhu: Rules for Playing Insane Characters | 20-22 | Different Worlds | 41 | Jan 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Lost | 23-38 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s; Serpentman |
| Lost and Found | | Lost and Found | | Jun 2024 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Lost at Sea | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Pacific Ocean |
| Lost Ball Games of Meso-Americans | 8-12 | Different Worlds | 32 | Jan 1984 | Chaosium | Call of Cthulhu (Classic) | |
| A Lost Chapel | | Cthulhu Maps - A Lost Chapel | 009 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Lost City | 1-34 | Lost City | | Nov 2019 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Lost City - Found! | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Lost Expedition | 2-30 | Age of Cthulhu Vol. IX: The Lost Expedition | 7009 | 2016 | Goodman Games | Call of Cthulhu (Classic) | |
| A Lost Home | | Cthulhu Maps - A Lost Home | 079 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Lost Jewels of Eire | 1-17 | The Lost Jewels of Eire | | Mar 2020 | Self Published | Call of Cthulhu (Classic), GURPS, Broken Compass, D6 Adventures | Slovenia; 1937 |
| Lost Library | 3-8 | Lost Library | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Somalia; 1920s |
| The Lost Library of Xi Huang | 84-92 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Lost Light | 4-18 | Lost Light | | Feb 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Lost Mines of Weirdhill | 3-15 | Lost Mines of Weirdhill | | Jun 2024 | Chaosium | Call of Cthulhu (Classic) | Finland; 1920s |
| The Lost Mojo | | The Lost Mojo | | 2023 | Miskatonic University Podcast | Call of Cthulhu (Classic) | Pacific Ocean; 1929; Star Spawn of Cthulhu |
| The Lost Notebook of Diedrich Knickerbocker | 12-14 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Lost of the Labyrinth | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Lost Photos of the Aldebaran Sect | 5-30 | The Lost Photos of the Aldebaran Sect | | Jan 2023 | Chaosium | Call of Cthulhu (Classic) | Michigan; Spring; 1922 |
| Lost Property | 18-19 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Ghoul |
| The Lost Station Horror | 20-34 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Lost Sy'Norahthyth | 11-18 | Tempestuous Orifice | 3 | | Self Published | Call of Cthulhu (Classic) | |
| Lost Symmetry | | Lost Symmetry | | Feb 2020 | Chaosium | Call of Cthulhu (Classic) | Boston; 1920s |
| A Lost Temple - Petra | | Cthulhu Maps - A Lost Temple - Petra | 124 | Jan 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| A Lost Temple - Ur | | Cthulhu Maps - A Lost Temple - Ur | 126 | Jul 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| A Lost Temple in the Jungle | | Cthulhu Maps - A Lost Temple in the Jungle | 123 | Nov 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Lost Temple of the Vethalam | | The Lost Temple of the Vethalam | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | India; 1920s |
| The Lost Temple of Yig | 1-30 | d20 Call of Cthulhu Gamesmaster's Pack | CHA8801 | 2002 | Chaosium | Call of Cthulhu (Classic) | Brazil |
| Lost Worlds in Blue | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| The Lost Ziggurat | | Cthulhu Maps - The Lost Ziggurat | 026 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Loula Institute | 41-60 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Love You to Death | 7-24 | Does Love Forgive? | CHA23172 | 2020 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1929; February |
| Lovecraft and the Necronomicon | 16-19 | Different Worlds | 47 | Aut 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Lovecraft Country Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Lovecraftian Achievements | | Lovecraftian Achievements | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Lovecraftian D&D Campaigns | 284-288 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Lovecraftian Magic | 53-66 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Lovecraftian Timeline | 14 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Loveland Frog | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Loving Spoonful | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Lowlands | 29-74 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Lowyatar's Children | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Lozdra | 286-297 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Lozdra | 1-12 | Lozdra | | 1998 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Lozdra | 5-16 | Opifex Bimonthly | 19 | May 1999 | Self Published | Call of Cthulhu (Classic) | Scotland; 1920s |
| Lt. Gabriel Patersen | 1 | Tuesday Terribles | 4 | Sep 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Lucie's Dispensation | | Lucie's Dispensation | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | France; 1918 |
| Lucille Taylor, The Hummingbird Lady | 1 | Tuesday Terribles | 2 | Sep 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Luck Be With You | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Lucy Still Eats Meat | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Lunacy | 1-19 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Lunatic Asylums in the Twenties | 31-39, 42-44 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Lurker Beneath | | Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) | 1920s |
| The Lurker in the Crypt | 61-112 | Fatal Experiments | CHA2328 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; March; 1920s; Ghoul |
| Lurker in the Mist | 1-18 | Lurker in the Mist | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | California; 1920s |
| The Lurker in the Sky | Mar 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1926 |
| Lurkers in the Dark | | Lurkers in the Dark | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Michigan; 1927 |
| The Lusca | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Luxtorpeda | | Luxtorpeda | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Poland; 1934; January |
| M-EPIC | 124-163 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| M.U. by Department | 23-39 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Machine Beneath the Earth | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | United Kingdom |
| Machine Guns | 93-98 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Machine Man | 213-217 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Dungeons and Dragons, Call of Cthulhu (Classic), Pathfinder | Pennsylvania; 1929 |
| Machine Tractor Station Kharkov-37 | 1-60 | Machine Tractor Station Kharkov-37 | CHA0310 | 2004 | Chaosium | Call of Cthulhu (Classic) | Russia; 1931; December; Colour Out of Space |
| The Mad Man's Auction | | The Mad Man's Auction | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Madam Long | Apr 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| The Madman | 22-26 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 28-38 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | England; 1928; October |
| The Madman | 21-24 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | A:84-85 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 87-88 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 233-236 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 265-269 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | B:77-78 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 174-177 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | Vermont; Mi-Go |
| The Madman | 94 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Madman | 265-269 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| The Madman | 265-269 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| The Madman | 265-269 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Madness in London Town | 2-32 | Age of Cthulhu Vol. II: Madness in London Town | 7002 | 2009 | Goodman Games | Call of Cthulhu (Classic) | London; 1928 |
| Madness of the Ancestors | 121-156 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | Kenya; 1931; Ghoul |
| Madness of the Black Opal | 55-69 | Strange Tales of Dread & Wonder #2 | CHA0330 | 2006 | Chaosium | Call of Cthulhu (Classic) | Australia; 1920; Lesser Race |
| Maenads | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Maggot Walkers | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Magic | 82-94 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Magic | 89-104 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Magic | 172-181 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Magic | 56-64 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Magic | 83-112 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Magic | 63-72 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Magic | 49-55 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Magic | 118-151 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Magic | 172-181 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Magic and Spells | A:63-74 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Magic and Spells | 67-79 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Magic and Spells | B:59-69 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Magic and Spells | 76-87 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Magic and the Gods | 67-84 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Magic in the Campaign | 105-111 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Magic of the Manoscritto | 49-53 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Magical Mishaps of Masks | 38-42 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Magical Mishaps of Masks | 43-48 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Magna of Illusion | 166-179 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | England; 1919 |
| Mahicantuk Tomahawk | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mail Order Bride | 173-189 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Mail-Order Bribe | 1-18 | Mail-Order Bribe | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; 1922; December |
| Mail-Order Bribe | 68-90 | Embraced Fate | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Boston; December; 1922 |
| The Make Your Aquaintance: George Price | 31 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | |
| The Making of Kenya | 16-34 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Making of Morocco | 7-14 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| The Making of Morocco | 7-15 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Making Pregenerated Characters | 118-121 | Bayt al Azif | 6 | Feb 2026 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Malediction of the Moon | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Malevolent Marvels Book 1 | | Malevolent Marvels Book 1 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Malevolent Marvels Book 2 | | Malevolent Marvels Book 2 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Malevolent Marvels Book 3 | | Malevolent Marvels Book 3 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Malevolent Marvels Book 4 | | Malevolent Marvels Book 4 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Malevolent Marvels Book 5 | | Malevolent Marvels Book 5 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Malice Everlasting | 87-103 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Kingsport; Y'Golonac |
| Malice Everlasting | 101-120 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Kingsport; Y'Golonac |
| The Malignity | 4-26 | The Malignity | | Mar 2020 | Chaosium | Call of Cthulhu (Classic) | California; Autumn; 1925 |
| Malleus Monstrorum Deck | | Malleus Monstrorum Deck | CHA23171 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Malyutin's Nightmare Matryoshkas | 8 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Man and Mantis: The Art of the Prophet in Ancient Greece | 43-44 | Cryptych | 7 | Jul 1994 | ILM International | Call of Cthulhu (Classic) | |
| A Man Called West | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Man Downstairs | | The Man Downstairs | | Feb 2018 | Chaosium | Call of Cthulhu (Classic) | New York |
| The Man of Her Dreams | Mar 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Man to Purgatory, A Woman to Hell | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Martinique; 1928; May |
| The Man Who Shot Joseph Curwen | 72-76 | Dubious Shards | RA001 | 2006 | Atomic Overmind Press | Call of Cthulhu (Classic) | |
| The Man with a Thousand Faces | 28-57 | The Unspeakable Oath | 21 | Jul 2012 | Pagan Publishing | Call of Cthulhu (Classic) | California; 1920s |
| The Man with a Thousand Faces | 238-268 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | California; 1920s |
| Man's Best Friend | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Manacles | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| The Manacles | 11-12 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Manacles | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| The Manacles | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England |
| Manhattan: Downtown | 79-98 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Manhattan: Midtown | 56-78 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Manhattan: Uptown | 32-55 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Maniacal Shannon Appel NPC | | Chaosium Digest | v26n10 | Nov 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Mannikin | 85-99 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Mansion of Madness | 88-114 | Mansions of Madness | CHA2327 | 1990 | Chaosium | Call of Cthulhu (Classic) | Boston |
| Mansion of Madness | 90-115 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | Boston |
| Mantis Men | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Mantle of Graag | 11-15 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Mantle of Graag | 16-24 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Manuscripts Don't Burn | 43-53 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Many Mansions | 3-17 | Many Mansions | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Map of Mythos Locations | 77 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Maps for a Mad Scientist's Lair | 1-2 | Maps for a Mad Scientist's Lair | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Maps for Blank | 1-4 | Maps for Blank | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Maps for Curio | 1-6 | Maps for Curio | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Maps for Dissonance | 1-4 | Maps for Dissonance | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Maps for Terror in Tangier | 1-7 | Maps for Terror in Tangier | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | |
| March Madness | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| March to the Fourgon | 2:20 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Mari Lwyd | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Marine Abyss beyond Devil Reef | 23 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Marked by the Devil | 50-52 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Marrakech | 42-54 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Marsh Mansion | 110-120 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Marsh Mansion | 112-121 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Marsh Refinery | 146-153 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Martial Arts in CoC | | Chaosium Digest | v16n01 | Aug 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Martin's Beach Monster | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mary | 7-18 | Before the Fall | CHA2377 | 1998 | Chaosium | Call of Cthulhu (Classic) | Arkham; Innsmouth; 1920s |
| Mask of Desire | 25-43 | Does Love Forgive? | CHA23172 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; September; 1932 |
| The Mask of Hayama | 133-135 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Mask of Hayama | 126-128 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Mask of Neil Marlow's Pet | 102-111 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | Arkham; Halloween |
| The Mask of the Black Sun | | The Mask of the Black Sun | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | Canada; 1928 |
| The Masked Ones | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Masks of Halloween | 60-85 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | 1926; Halloween |
| Masks of Nyarlathotep - ch1 - New York Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch1 - New York Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - ch2 - London Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch2 - London Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - ch3 - Cairo Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch3 - Cairo Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - ch4 - Kenya Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch4 - Kenya Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - ch5 - Australia Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch5 - Australia Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - ch6 - Shanghai Pack | | Cthulhu Maps - Masks of Nyarlathotep - ch6 - Shanghai Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - Meeting Tables | | Cthulhu Maps - Masks of Nyarlathotep - Meeting Tables | | Dec 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep - Prologue - Peru Pack | | Cthulhu Maps - Masks of Nyarlathotep - Prologue - Peru Pack | | Apr 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Masks of Nyarlathotep Gamer Prop Set | | Masks of Nyarlathotep Gamer Prop Set | | 2018 | The H P Lovecraft Historical Society | Call of Cthulhu (Classic) | |
| Masks of the Puppet Lord | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Mason Mansion | 1-10 | Mason Mansion | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Massachusetts Back Country | 51-61 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| The Masses Against the Classes: Life - Culture - Society | 34-50 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Masters of Space and Time | 4 | Starry Wisdom | 2 | Spr 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Matador | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Matlock Fire | 36 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Matlock Fire | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| A Matter of Taste | | Chaosium Digest | v18n09 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Matter of Taste | 44-45 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| A Matter of Taste | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Mauretania | 59-70 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean |
| The Mauretania | 52-63 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean |
| The Maw | 6-54 | Dossier No 1: The Maw | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | Germany; 1920s |
| May I Help You | 27-37 | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| May Tricks | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | United Kingdom |
| Mayhem in the Madhouse | | People of Innsmouth | 15 | | Self Published | Call of Cthulhu (Classic) | |
| The Maze of Madness | 2-37 | The Maze of Madness | | 2004 | Self Published | Call of Cthulhu (Classic) | Washington DC; 1925 |
| McKiernan's Lighthouse | E:1-9 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; Summer; 1922 |
| The Mechanics of Fear and Madness | 44-51 | RPG Review | 7 | Mar 2009 | Self Published | Trail of Cthulhu, Advanced Dungeons and Dragons (Ravenloft), Chill, Little Fears, GURPS, Vampyre the Masquerade, Call of Cthulhu (Classic), Kult | |
| Media | 34-39 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Call of Cthulhu (Classic), Trail of Cthulhu | |
| Medical Forms | | Medical Forms | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Medicine | 26 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Medicine Show | | The Medicine Show | | Jul 2018 | Chaosium | Call of Cthulhu (Classic) | Texas |
| Medieval (500-1499) | 16-25 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Medina in the Desert | | Cthulhu Maps - A Medina in the Desert | 019 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Mediumship Explored | 83-86 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Medusa | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Meet the Walsh Family | 13-15 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Meeting Room | | Cthulhu Maps - The Meeting Room | 101 | Jul 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Megapede | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mellified Lich | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mellified Monsters | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mellified Monsters | | Mellified Monsters | | Jul 2021 | Last Mile Game Logistics | Call of Cthulhu (Classic) | |
| Memento Mori | 66-68 | Challenge | 74 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| Memorable Major Wounds | 3-10 | Memorable Major Wounds | | May 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Men in Black | 28-29 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Men in Black | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Men's Fashion | 6-11 | Bloodmoon's Guide to Historical Fashions: 1920s | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Menace from Manchuria | 172-173 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Menace from the Moon | 3-50 | Menace From the Moon | CHA0336 | 2007 | Chaosium | Call of Cthulhu (Classic) | California; September; 1929 |
| The Menagerie of Forgotten Horrors | | The Menagerie of Forgotten Horrors | | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | New York; 1923 |
| Menhirs in the Grotto | 106-137 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | Mexico; Autumn; 1923 |
| Mental Disorders | 114-117 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Mental Disorders | 128-132 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Merchant | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mercy Brown | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mercy, Father, Mercy | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mesisopheles' Malicious Milk | 4-25 | Annals of Flint's Detective Agency: Mesistopheles' Malicious Milk | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Illinois; June; 1926 |
| Messengers of Yig | Jun 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Meteorites | 47 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| A Method of Describing Mythos Books | | Chaosium Digest | v02n07 | Jun 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Method to Madness | 20-35 | Terrors from Beyond | CHA23113 | 2009 | Chaosium | Call of Cthulhu (Classic) | New England; 1920s; Mi-Go |
| Mgepgathg | 3-7 | Mgepgathg | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Mi-go Brain Cylinder Mobility Unit | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mi-go Human Hybrids | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mi-Go Pain Scope | 43-45 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Michigan Mythos: Fall Colors | | Michigan Mythos: Fall Colors | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Michigan; 1935; Autumn; Colour Out of Space |
| The Middle Manager Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Midlock Dragons | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Midlock Dragons | 12-13 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Midlock Dragons | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Midlock Dragons | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Midnight Snack | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Migo Queen | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mike's Free Mythos Maps Collection | | Mike's Free Mythos Maps Collection | | Mar 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Miles Shipley and His Things | 192-194 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Miles Shipley and His Things | 176-178 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Millan's Tomb | 1-2 | Millan's Tomb | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Mimi | 44-45 | Different Worlds | 20 | Mar 1982 | Chaosium | Call of Cthulhu (Classic) | |
| Mimic Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mind Control Helmet | May 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Mind Over Matter | 1-7 | Mind Over Matter | | 2016 | Self Published | Call of Cthulhu (Classic) | 1920s |
| Mind Over Matter | 7- | Shadis | 38 | Jul 1996 | Alderac Entertainment Group | Call of Cthulhu (Classic) | |
| Mind-Blanked Yith Agent | 77-79 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| The Mine on Yuggoth | 233-243 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Mine on Yuggoth | 246-257 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Mingled Remains | 3-19 | Mingled Remains | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | Florida; December; 1928 |
| The Miracle | | Chaosium Digest | v17n08 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | Haiti |
| The Miracle | 41-42 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Haiti |
| The Miracle | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Haiti |
| The Miracle Drug | 90 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Mirror Cyst | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mirror Mirror | 44-57 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | 1920 |
| The Mirror of Blood | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Mirror of Gal | 224-226 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Mirror of Gal | 207-209 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Mirror: Avatar of Bast | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Miscellaneous | 101-102 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Miskatonic Auditorium | | Cthulhu Maps - The Miskatonic Auditorium | 055 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Miskatonic Confidential Female 1920s | | Miskatonic Confidential Female 1920s | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic Confidential Male 1920s | | Miskatonic Confidential Male 1920s | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Miskatonic Library | | Cthulhu Maps - The Miskatonic Library | 029 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Miskatonic Repository Watch-to-Win Ads | 1-2 | Miskatonic Repository Watch-to-Win Ads | | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic Secrets | 151-213 | Miskatonic University | CHA2389 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic U. Doctoral Diploma | | Miskatonic U. Doctoral Diploma | CHA5101-D | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic U. Graduate Kit | | Miskatonic U. Graduate Kit | CHA5101 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic U. Master of Arts Diploma | | Miskatonic U. Master of Arts Diploma | CHA5101-M | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic University | 15-76 | Miskatonic University | CHA2389 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Miskatonic University Forms | | Miskatonic University Forms | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Missed Dues | 56-73 | Keeper Screen Pack | CHA23137 | 2015 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1922; Azathoth; Servitor of the Outer Gods |
| Missed Dues | | Missed Dues | CHA0419 | 2013 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1922; Azathoth |
| Missed Dues | | Missed Dues and Other Adventures | | 2013 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1922; Azathoth |
| The Missing Body | Nov 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Missing Curiosity | 129-158 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Missing Daughter | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Missing Fossil | | The Missing Fossil | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | Mongolia; 1925 |
| Missing in the Rocky Mountains | 1-15 | Missing in the Rocky Mountains | | Jul 2024 | Chaosium | Call of Cthulhu (Classic) | Colorado; June; 1926 |
| The Missing of Dunver Island | 3-13 | The Missing of Dunver Island | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Missing Psychic | | drelb.free.fr | | | Self Published | Call of Cthulhu (Classic) | England; 1927 |
| Mission of Mercy | 254-264 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933 |
| Mission to Canada | 21-31 | A Time to Harvest Episode 3 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Canada; 1930 |
| Mission to Canada | 170-183 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Canada; 1930 |
| Mission to the Moon | 4-14 | A Time to Harvest Episode 6 | | 2016 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| Mission to the Moon | 247-270 | A Time To Harvest | CHA23176 | 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1930 |
| The Mist Sower | | The Mist Sower | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Mist Sower | 131-151 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Mistaken Identity | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mister Corbitt | 11-40 | Mansions of Madness Volume 1: Behind Closed Doors | CHA23167 | 2020 | Chaosium | Call of Cthulhu (Classic) | Yog-Sothoth |
| Mitchell-Hedges and the Skull of Doom | 18-21 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Mixed Blessing of Crossovers | Sep 2002 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mob Leaders | 16-21 | Different Worlds | 27 | Mar 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Modern Madness | 42, 44-45, 47-49, 51-52 | Shadis | 19.5 | Jun 1995 | Alderac Entertainment Group | Call of Cthulhu (Classic) | |
| Molt | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Moment of Impact | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Georgia state; Summer; 2021 |
| Moments of Respite | | Moments of Respite | | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Mona / The Monkey Witch | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Money and Prices | 20 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Money, Goods and Prices | 50-52 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Money, Money, Money | 59-60 | Red Giant | 2 | 1990 | Folio Works | Call of Cthulhu (Classic) | |
| The Monolith | 164-170 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Scotland; 1931 |
| Monophobia - Rules Light Solo Roleplaying | | Monophobia - Rules Light Solo Roleplaying | | Aug 2020 | Chaosium | Call of Cthulhu (Classic) | |
| A Monster in the Classical Tradition | 36-? | Dragon | 210 | Oct 1994 | TSR | Call of Cthulhu (Classic) | |
| Monsters | 87-88 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters and their Kynde: Messengers of the Crawling Chaos | 29-50 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Monsters from Folklore | 171-184 | Malleus Monstrorum Volume 1: Monsters of the Mythos | CHA23168 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters from Folklore | A:171-184 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters of Green Hell | 16-20 | Different Worlds | 35 | Jul 1984 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters of the Lands and Seas of New England | 79-88 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| The Monsters of the Mythos | 7-65 | S. Petersen's Field Guide to Lovcraftian Horrors | CHA23138 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters of the Mythos | 31-170 | Malleus Monstrorum Volume 1: Monsters of the Mythos | CHA23168 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters of the Mythos | A:31-170 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters, Beasts and Alien Gods | 278-342 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Monsters, Beasts and Alien Gods | 278-342 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Monstrous Adventure Hooks | 76-85 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | |
| Monstrous Deep One Hybrids, Eel Hybrid | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Moon Hounds | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Moon Lens | 19-23 | Role Player Independent | 5 | Apr 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | England |
| More Advice for Keepers: The Advantage of Occupational Themes | | Chaosium Digest | v36n05 | May 2002 | Chaosium | Call of Cthulhu (Classic) | |
| More Light | 84-112 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| More Light | 94-121 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| More Magic for Call of Cthulhu | 6 | Different Worlds | 35 | Jul 1984 | Chaosium | Call of Cthulhu (Classic) | |
| More Music Suggestions for Call of Cthulhu | | Chaosium Digest | v04n10 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| More Mythos Monsters | 20-22 | Different Worlds | 40 | Jul 1985 | Chaosium | Call of Cthulhu (Classic) | |
| More Notes on Migrating from AD&D | | Chaosium Digest | v17n06 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | |
| More Occult Tomes for CoC | | Chaosium Digest | v04n05 | Oct 1993 | Chaosium | Call of Cthulhu (Classic) | |
| More Thoughts on Character Death | | Chaosium Digest | v17n07 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) | |
| More Thoughts on Cthulhu Literature | | Chaosium Digest | v05n01 | Dec 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Morgan Family Tree | 12 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Morgan Matthews, Directory for New Origins Movie Studio | 7-8 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Moroccan Interior | 40-53 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| The Moroccan Interior | 55-66 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Mortal Muncher | 1-22 | The Mortal Muncher | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1930; Vampire |
| Morton Valley Run | | Serendipity's Circle | 15 | | Self Published | Call of Cthulhu (Classic) | July |
| Mother of Ressurection | Apr 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Mother's Love | 147-161 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Innsmouth |
| Mothman | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Motoring | 38-40 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Mouldering Gramrye of Mythos Spells | | Mouldering Gramrye of Mythos Spells | | Nov 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Mountains | | Cinematic Environs: Mountains | | Mar 2019 | Critical Hit Publishing | Call of Cthulhu (Classic) | |
| Mountains of the Moon | 37-46 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Peru; July; 1929 |
| Mountains of the Moon | 86-97 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Peru; July; 1929 |
| Mountains of the Moon | 57-66 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Peru; July; 1929 |
| Mouthbreathers | 36-41 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | England; Deep One |
| Movie Previews | 6-9 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Movies to Have in Mind | | Chaosium Digest | v28n12 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Mr Corbitt | 6-18 | Mansions of Madness | CHA2327 | 1990 | Chaosium | Call of Cthulhu (Classic) | Yog-Sothoth |
| Mr Corbitt | 5-17 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | Yog-Sothoth |
| Mr Feste's Old Curiosity Shop | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| Mr Feste's Old Curiosity Shop | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| Mr Feste's Old Curiosity Shop | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Mr Grits | Oct 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mr Neil | | www.skinner.demon.co.uk/aidan/common/ | | | Self Published | Call of Cthulhu (Classic) | Boston; Deep One |
| Mr Pickett Goes a Huntin' | 22-23 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Mr Popatov | 4-5 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mr Popatov | 8-9 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Mr Regardies' House | | Derring-Do | 1.1 | Dec 2020 | Adventure Game Society | Call of Cthulhu (Classic) | Arkham; 1924 |
| Mr Sebastien | Jan 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mr Thompson's Wife | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mr. Lupus | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Mrs Wathernam | Oct 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mu | 222-239 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1930s; Yig; Serpentman |
| Muddy the Water to Catch the Fish | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| Multidimensional Transgressor | 45-47 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Mummers, Wrenboys and Strawboys | 41-42 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Mummerset Revisited | 18-23 | Red Giant | 1 | 1990 | Folio Works | Call of Cthulhu (Classic) | |
| The Mummy | 23 Feb-2009 | Talien's Tower | | | Self Published | Call of Cthulhu (Classic) | Egypt; 1920s |
| The Mummy Killings | | Black Mole | 3 | 1990 | Self Published | Call of Cthulhu (Classic) | |
| The Mummy of Pemberley Grange | | The Mummy of Pemberley Grange | | Sep 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Mummy's Bride | 42-51 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1935; Mummy |
| The Mummy's Curse | Jul 2009 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Mummy's Hand | 89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Murder in Grey Port | 57-98 | The Order of the Stone | CHA23160 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| A Murder of Crows | 38-69 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Boston; June |
| Murder of Crows | 1-27 | Murder of Crows | OWC4001 | 2008 | Super Genius | Call of Cthulhu (Classic) | New Hampshire |
| Murder of Crows | 57 | Game Trade Magazine | 100 | Jun 2008 | Alliance Game Distributors | Call of Cthulhu (Classic) | |
| The Murder of Mr S | 25-44 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | Germany; 1920s |
| The Murder Weapons Collection | | The Mana Bros | | | Self Published | Call of Cthulhu (Classic) | |
| Murder! | | Chaosium Digest | v17n01 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | United Kingdom; Psycopath |
| The Murderer of Thomas Fell | | The Murderer of Thomas Fell | | 2014 | Pelgrane Press | Call of Cthulhu (Classic) | |
| Murderous Fiend | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| The Musar Folio | 53-61 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Museum of Mannequins | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Illinois |
| A Museum of Natural History | | Cthulhu Maps - A Museum of Natural History | 018 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Music for Call of Cthulhu | | Chaosium Digest | v04n08 | Oct 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Music Suggestions for Call of Cthulhu | | Chaosium Digest | v04n10 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Musings on the Branch of the Brotherhood of the Black Pharaoh | 195-198 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Musings on the Branch of the Brotherhood of the Black Pharaoh | 179-181 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Musings on the Cult of the Bloody Tongue in New York | 116-121 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Musings on the Cult of the Bloody Tongue in New York | 105-110 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Must the Show Go On? | 57-68 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | Arkham; Halloween; Tcho-Tcho; Byakhee |
| My Aunt's House | 3-15 | Opifex Bimonthly | 2 | 1996 | Self Published | Call of Cthulhu (Classic) | 1990s |
| My Aunt's House | 1-20 | My Aunt's House | | 1996 | Self Published | Call of Cthulhu (Classic) | 1990s |
| My Aunt's House | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | 1990s |
| My Lucky Dice | 1-10 | My Lucky Dice | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | Australia; 1927 |
| My Overcrowded Pineal Gland | | My Overcrowded Pineal Gland | | 2000 | Self Published | Call of Cthulhu (Classic) | Mi-Go |
| Mysteria Matris Oblitae | 178-195 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Mexico; Summer; 1929 |
| Mysteria Matris Oblitae | 1-19 | Mysteria Matris Oblitae | | 2008 | Arc Dream Publishing | Call of Cthulhu (Classic) | Mexico; 1929; Summer |
| Mysteries of the Diverse States of New England | 101-141 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Mysteries, Legends and Rumors | 161-164 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Mysterious Britain: The Horn Dance | | Chaosium Digest | v04n11 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Mysterious Death | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Mysterious House | | Cthulhu Maps - A Mysterious House | 097 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Mysterious Innsmouth | 6-12 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Mysterious Innsmouth | 8-12 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Mysterious Lighthouse | | Cthulhu Maps - A Mysterious Lighthouse | 006 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Mysterious Manuscripts | 8 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mysterious Manuscripts | 17-27 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mysterious Manuscripts | 42-46 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mysterious Manuscripts | 15-18 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Mysterious Manuscripts | 16-17 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Mysterious Millionalire | 159-190 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Mysterious Places | 165-176 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Mysterious Places | 67-78 | Keeper's Compendium | CHA2344 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Mysterious Stranger | 89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Mystery At Ogwen's Farm | | Chaosium Digest | v32n10 | Nov 2000 | Chaosium | Call of Cthulhu (Classic) | 2000 |
| The Mystery At Ogwen's Farm | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | 2000 |
| Mystery Box | | Mystery Box | | Jun 2024 | Chaosium | Call of Cthulhu (Classic) | United States; 1920s |
| The Mystery from the Depths | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Oklahoma; 1922; August |
| The Mystery of April Snow | | The Mystery of April Snow | GGP | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Arkham |
| The Mystery of Loch Feinn | 31-38 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | Scotland; Lloigor |
| The Mystery of Loch Feinn | 151-158 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Scotland; Lloigor |
| The Mystery of Loch Feinn | 115-121 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Mystery of Oak Harbour | | The Mystery at Oak Harbour | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) | Louisiana; 1927 |
| Mystery of the South Channel Pilot Light | | Mystery of the South Channel Pilot Light | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Australia; 1925 |
| Mythmaiden | 6-9 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Mythology | 50-52 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Mythology | 55-56 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Mythology and Monsters | 33-35 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos | 103-107 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos and Modernity | 34 | Bayt al Azif | 6 | Feb 2026 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| The Mythos and Technology | 87-88 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Mythos Artifacts | | Mythos Artifacts | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos Collector | 124-135 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos Collector | Nov 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Mythos Comparative SIZes | 5 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos Cults | 35-54 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Mythos Cults of North West Australia | 396-405 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Mythos ex Machina | 136-147 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| A Mythos Grimoire | 191-218 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| A Mythos Grimoire | 217-247 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos Heirarchy | | Dagon | 6 | Mar 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Mythos in Australis | 155-202 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos in Hungary | 38-45 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Mythos in Ireland | 52-54 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos Magic | 55-80 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Mythos Master: A Bibliographic Study of Brian Lumley's Work | 23-25 | The Adventurer | 10 | May 1987 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Mythos Monster Silhouettes Art Pack | | Mythos Monster Silhouettes Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos Monster Tokens Sample Pack | | Mythos Monster Tokens Sample Pack | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos Names and How to Say Them | 3-7 | Dagon | 15 | Nov 1986 | Self Published | Call of Cthulhu (Classic) | |
| Mythos Races and Magic | 85-104 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Mythos Spells and Tomes | B:113-119 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Mythos Threats | B:84-111 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Myths and Mythos | 332-343 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Myxinous Scion | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| N'tse-Kaambl Scenario Ideas | | Chaosium Digest | v17n03 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | Dreamlands; Outer God |
| N?kinih and Zha-shg | Jun 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Nahab, the Undying, the Unending | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Nameless City, Nameless Terrors | 180-218 | The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | Egypt; Yemen; 1930 |
| Nameless Cults | | Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Nameless Offspring | 67-87 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Names | 7-17 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Trail of Cthulhu, Call of Cthulhu (Classic) | |
| Nan Matol | 16-19 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Narrative of Arthur Gordon Pym of Nantucket | 3-140 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Narrative Threads | 45-57 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Nasty Little Curios | | Nasty Little Curios | | Apr 2020 | Isolation Games | Call of Cthulhu (Classic) | |
| Nasty, Nice, or Nefarious? Five NPC Encounters | 71-88 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Natasha | 40 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| Native Americans of New England | 59-78 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| The Nature of Faith | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Nautical Skill | 106 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Nautical Skills | B:12 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Nautical Skills | B:93 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Nearly Human | | Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Necronomicon | 101-103 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Necronomicon | 112-114 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Necronomicon | 69-70 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Necronomicon | | Timeout | 21 | | Self Published | Call of Cthulhu (Classic) | |
| The Necronomicon | | George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) | |
| Necronomicon | 367-382 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Necronomicon Notes | | Chaosium Digest | v03n11 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Necronomicon Page 143 The Other Gods | 1-1 | Necronomicon Page 143 The Other Gods | | Jan 2015 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| Necronomicon Page 76 Eye of the Zombie | 1-1 | Necronomicon Page 76 Eye of the Zombie | | Jan 2015 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| Necronomicon Page 97 Deep Ones | 1-1 | Necronomicon Page 97 Deep Ones | | Jan 2015 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| The Necronomicon: The Dee Translation | 130-198 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Necronomicon: The Dee Translation | 197-300 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Necronomicons | | Chaosium Digest | v19n01 | Apr 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Necropolis | | Gateways to Terror | CHA23140 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Ned Lords | 50 | Knights of the Dinner Table | 161 | Mar 2010 | Kenzer and Company | Call of Cthulhu (Classic) | |
| Needles | 75-88 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| Neighbours II - Death Comes to Ramsey Street | | PerChance | 6 | Sep 1991 | Self Published | Call of Cthulhu (Classic) | |
| Neil's Curiosity Shop | 27-33 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Nemesis | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Nemesis Strikes! | 24-35 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s; Psycopath |
| The Nest | | The Nest | | May 2021 | Chaosium | Call of Cthulhu (Classic) | London; March; 1925 |
| Net-a Net Ikhut Kemut | 265-267 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Net-a Net Ikhut Kemut | 246-248 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| A Network of Tunnels | | A Network of Tunnels | | May 2023 | Chaosium | Call of Cthulhu (Classic) | London |
| Never Cry Wolf | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Never Say Never | | Never Say Never | | 2010 | Self Published | Call of Cthulhu (Classic) | London; 1960s |
| New & Old Weapons for Call of Cthulhu | 7-16 | Fatal Experiments | CHA2328 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| New (Optional) Skills | 5-31 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| New (or Variant) Mythos Books | 51-58 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| A New Age of Wonders | | The Blasphemous Tome | 3 | Dec 2017 | Self Published | Call of Cthulhu (Classic) | |
| New Alchemical Tomes | 48-54 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| New and Enhanced Skills | 362-365 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| New Bugs | Aug 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| New Carcosa | 41-53 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| New CoC Skills from Mythos Readers | | Chaosium Digest | v01n06 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| A New Dark Age | | The Blasphemous Tome | 12 | Jul 2024 | Self Published | Call of Cthulhu (Classic) | |
| New Eden | | New Eden | | 1998 | Oswald Morden Entertainment | Call of Cthulhu (Classic) | |
| New England Between the Wars | 19-42 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| New England's Interstate Roads | 5-6 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| New England's Petroglyphs | 12-21 | The Arkham Gazette | 0 | Aug 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| New England's Witch Trials | 3-12 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| New Equipment | 1-10 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The New Ghosts | 14-19 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| New Guinea Football | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Papua New Guinea |
| New Hamelin, 2035 | | Annai Enterprises | | | Self Published | Call of Cthulhu (Classic) | Rhode Island; 2035 |
| New Insanities and Expanded Phobias | 32-38 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| New Locations in Kingsport | 3-11 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| New Luck Spends for Pulp Cthulhu | Oct 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| New Mi-Go Technology | | Chaosium Digest | v18n11 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) | |
| New Mythos Deities, Races, and Monsters | 29-31 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| New Mythos Minions and Monsters | 59-70 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| New Occupations | 123-126 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| New Occupations | 21-34 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| New Orleans | 36-58 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1991 |
| New Phobias | 18-20 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| New Republic Era Houses (1770-1850) | 9-20 | This Old Haunted House | CHA0361 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| New Republic Era Houses (1770-1850) | 6-19 | This Old Haunted House, Too | CHA0373 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| New Rules | 25-34 | Silent Hill | | 2009 | Tribal Morgue Studios | Call of Cthulhu (Classic) | |
| New Skill: Contacts | | Chaosium Digest | v11n05 | Aug 1995 | Chaosium | Call of Cthulhu (Classic) | |
| New Skills | 35-50 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| New Spells | 12-13 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| New Spells and Magical Artifacts | 39-50 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| A New Tome for CoC | | Chaosium Digest | v06n03 | Apr 1994 | Chaosium | Call of Cthulhu (Classic) | |
| New Tricks | 3-46 | New Tricks | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | New York; 1924 |
| New York | 18-41 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | New York; 1925 |
| New York | 20-46 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | New York; 1925 |
| New York | A:1-16 | Masks of Nyarlathotep | CHA2307-X | 1984 | Chaosium | Call of Cthulhu (Classic) | New York; 1925 |
| New York | 11-26 | Masks of Nyarlathotep | CHA3304 | 1989 | Chaosium | Call of Cthulhu (Classic) | New York; 1925 |
| New York | 29-36 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | New York; 1920s |
| New York City | 44-75 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | New York; 1933; Serpentman |
| Newcastle | 70-77 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; July; 1929; Ghast |
| A Newspaper Office | | Cthulhu Maps - A Newspaper Office | 127 | Jul 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| Next Steps | B:22 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Next Steps | B:22 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Ngayurnangalkul, Exiles of the Great Race | 378-383 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| A Nice Night for Screaming | 25-32 | Imagine | 28 | Jul 1985 | TSR | Call of Cthulhu (Classic) | Florida; 1926 |
| A Night at the Gallery | 9-21 | Opifex Bimonthly | 18 | Mar 1999 | Self Published | Call of Cthulhu (Classic) | Washington DC |
| A Night at the Gallery, Part 1 | | Chaosium Digest | v29n08 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | Washington DC |
| A Night at the Gallery, Part 2 | | Chaosium Digest | v29n09 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | Washington DC |
| A Night at the Opera | 79-96 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York; Azathoth; Insect from Shaggai |
| The Night Door | | The Night Door | | Sep 2018 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1928; July; Serpentman |
| Night Forms a Cover for Sinners | 111-128 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Puerto Rico |
| The Night Haunt | | The Night Haunt | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | Paris; 1928 |
| A Night in a Club | | Cthulhu Maps - A Night in a Club | 044 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| A Night in Edo | 3-26 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | Japan; 1925; Ghoul |
| Night Lord | Oct 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Night Lord | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Night Mother's Moon | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | New York; Tcho-Tcho |
| Night of the Long Knives | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Night of the Long Knives | 31 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Night of the Long Knives | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Night Terrors of Joseph Pidulski | | The Night Terrors of Joseph Pidulski | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Ohio; 1930 |
| Night Vision Goggles | May 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| The Night War | 105-126 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Kingsport |
| The Night War | 121-146 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Kingsport |
| Nightcap | 70-91 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Kentucky; November; 1922 |
| The Nightmare at Vivi Station | 47-58 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| The Nightmare Flight | 4-16 | The Nightmare Flight | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; Autumn; 1928 |
| The Nightmare from the Ice | | Amulet | 1 | 1987 | Self Published | Call of Cthulhu (Classic) | 1920s |
| Nightmare in Norway | 3-35 | Nightmare in Norway | MM3 | 1985 | Games Workshop | Call of Cthulhu (Classic) | Norway; February; 1925; Troll |
| Nightmare in Providence | | Nightmare in Providence | | Jun 2020 | Chaosium | Call of Cthulhu (Classic) | Providence; 1928 |
| Nightmare in Silence | 10-22 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | Germany; 1920; Non-Mythos |
| Nightmare in the Moonlight | | Nightmare in the Moonlight | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | Providence; November; 1927 |
| Nightmare Parasites | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Nightmares and Worse | 41-46 | Protodimension | 11 | Win 2012 | Kinstaff Media | Call of Cthulhu (Classic), Basic Role-Playing | |
| Nightmares Beneath the Lonely Plateau | 4-30 | Nightmares Beneath the Lonely Plateau | | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | Alaska; 1920s |
| Nightmares From the Depths | | Nightmares From the Depths | | Feb 2026 | Chaosium | Call of Cthulhu (Classic) | Boston; 1925; March |
| Nightscare: "To Sleep With the Fishes" | | Serendipity's Circle | 17 | | Self Published | Call of Cthulhu (Classic) | |
| The Nika Hoard | 44-45, 63 | Game News | 7 | Sep 1985 | Associates International | Call of Cthulhu (Classic) | Middle East; 1920s |
| The Ninetenth Hole | 143-179 | Mansions of Madness Volume 1: Behind Closed Doors | CHA23167 | 2020 | Chaosium | Call of Cthulhu (Classic) | Scotland |
| Ningen | Jan 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Niteside Dreams | 1-48 | Niteside Dreams | | 2002 | Self Published | Call of Cthulhu (Classic) | |
| No Rest for the Wicked | | Serendipity's Circle | 16 | | Self Published | Call of Cthulhu (Classic) | |
| No Room at Innsmouth: Devil Reef | | Dagon | 3 | Aug 1984 | Self Published | Call of Cthulhu (Classic) | Innsmouth; Deep One |
| No Room at Innsmouth: Gilman House | | Dagon | 1 | Nov 1983 | Self Published | Call of Cthulhu (Classic) | Innsmouth; Deep One |
| No Room at Innsmouth: The Lighthouse | | Dagon | 2 | Feb 1984 | Self Published | Call of Cthulhu (Classic) | Innsmouth; Deep One |
| No Silver Linings | 3-22 | No Silver Linings | | Aug 2023 | Chaosium | Call of Cthulhu (Classic) | Ireland; October; 1919 |
| Noctiline | | Noctiline | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Noctiline | 95-112 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Nocturne | B:58-73 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Switzerland; 1923 |
| Nocturne | B:181-207 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Switzerland; 1923 |
| Nocturne | A:213-234 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Switzerland; 1923 |
| The Non-Euclidean Gate | C:68-82 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | London |
| A Non-Mythos Menagerie | 35-38 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Non-Player Characters | 83-86 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Non-Player Characters, Creatures and Encounters | 102-118 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| None More Black | 96-110 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Yibb-Tstll |
| North Borneo | 76-103 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Borneo; 1933; Dhole; Ghoul; Gug; Leng Spider; Serpentman; Zoog; Buopoth |
| The North York Moors | 40-52 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; July; 1929; Insect from Shaggai |
| Not Quite Dead | Nov 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Not Quite Human | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Notable Persons | 65-83 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Note For Note | B:74-85 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Note for Note | B:208-230 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Note for Note | A:235-253 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Italy; 1923 |
| Notebook Found in a Deserted House | 217-235 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Notes on a Fragment of the Necronomicon | A:93-94 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Notes on a Fragment of the Necronomicon | 187-188 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Notes on a Fragment of the Necronomicon | B:85-86 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Notes on the Turner Codex | | Notes on the Turner Codex | | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | |
| Nothing is Lost, All is Transformed | | Nothing is Lost, All is Transformed | | Feb 2022 | Chaosium | Call of Cthulhu (Classic) | Paris; 1937 |
| Nothingness | Feb 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Novel of the Black Seal | 113-145 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Novel of the Black Seal | 122-155 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| NPC Alchemists and Alchemical Creatures | 30-40 | Codex Alchemica Folio II | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| NPCs | 74-75 | The Last Province | 5 | Aug 1993 | Last Province Publishing | Call of Cthulhu (Classic) | |
| NPCs and the Keeper | 86-94 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Nug's Farm | 107-125 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | England; 1929; December |
| Nya'kwaehe'h, The Naked Bear | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Nyarlathotep | 9-13 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Nyarlathotep | | Ancient Cthulhu Cuneiform Tablet II - Nyarlathotep | VOM010 | 2017 | The Vaults of McTavish | Call of Cthulhu (Classic) | |
| O Apple Tree | Apr 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| O' Sleeper! Arise! | 139-146 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | Tibet; Star Spawn of Cthulhu |
| Oath of Blood | 15-24 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; 1929; Vampire |
| The Obelisk of Teg Suturloc | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Oblivion Circle | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Oblivion Circle | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Obsequious Servants | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Observatory in the Mountains | | Cthulhu Maps - An Observatory in the Mountains | 048 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Occult | 38-42 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| The Occult | 23-25 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The Occult | 49-52 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Occult Books | 23-81 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Occult Books Bibliography | | The Unnamed | 3 | | Self Published | Call of Cthulhu (Classic) | |
| Occult London | 72-77 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Occult Odds and Ends | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Occult Organizations of the 1920's | 14-16 | Different Worlds | 45 | Mar 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Occult Organizations of the 1920's | 14-16 | The Hungry Maggot | 2 | Mar 1995 | Self Published | Call of Cthulhu (Classic) | |
| Occult Tomes for CoC | | Chaosium Digest | v02n12 | Jul 1993 | Chaosium | Call of Cthulhu (Classic) | |
| An Occult Who's Who of the 1920s | 34-38 | Different Worlds | 43 | Jul 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Occult Works | | Manic Depressive | 1 | 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Occulted Light | 44-52 | Before the Fall | CHA2377 | 1998 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s; Star Spawn of Cthulhu; Deep One |
| Occupation Kit: Actor | | Occupation Kit: Actor | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Antique Dealer | | Occupation Kit: Antique Dealer | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Artist | 2-5 | Occupation Kit: Artist | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Bartender | | Occupation Kit: Bartender | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Dilettante | | Occupation Kit: Dilettante | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Doctor of Medicine | | Occupation Kit: Doctor of Medicine | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Explorer | | Occupation Kit: Explorer | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Journalist | | Occupation Kit: Journalist | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Occultist | | Occupation Kit: Occultist | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Private Investigator | | Occupation Kit: Private Investigator | | Aug 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Professor | | Occupation Kit: Professor | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Occupation Kit: Undertaker | | Occupation Kit: Undertaker | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Occupations | 13-14 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Occupations | 66-93 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Ocean of Sand | 84-101 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | Morocco |
| Odd Behavior | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| The Odd Ingredient | 89 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| Odder Than Odd | 18-21 | Polyhedron | 54 | Jul 1990 | TSR | Call of Cthulhu (Classic) | Boston; 1920s |
| An Ode for the Lost | 209-236 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| The Odin Disc | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Odontalgia | Jun 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Of Angels and Bones | 3-21 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Classic) | Oklahoma; 1924; Halloween |
| Of Evill Sorceries Done in New England of Daemons in no Humane Shape | 60-64 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Of Fathers | 4-17 | Of Fathers | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1926 |
| Of Grave Concern | 15-32 | Monophobia | 1001 | 2010 | Unbound Publishing | Call of Cthulhu (Classic) | Arkham |
| Of Sorrow and Clay | 4-21 | Of Sorrow and Clay | | May 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Of Wrath and Blood | | Of Wrath and Blood | | Apr 2019 | Chaosium | Call of Cthulhu (Classic) | Maryland; 1920s |
| Of Yoharneth-Lahai | 1-2 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Off to the Races | 3-23 | Off to the Races | | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | South; 1930 |
| The Offspring of the Tomb | 218-226 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Oh! You Pretty Things | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Oily Grave | 10-11 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Greenland; 1930s; April |
| Oklahoma | 104-125 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Oklahoma; 1930s |
| An Old Abandoned Manor | | Cthulhu Maps - An Old Abandoned Manor | 001 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Old Acquaintance | 19-30 | Before the Fall | CHA2377 | 1998 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; 1920s |
| Old Bones | 153-186 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | India; 1920s |
| The Old Church | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| The Old Church | 17-18 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London |
| The Old Church | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| The Old Church | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | London |
| The Old Cottage | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| An Old Country Domain | | Cthulhu Maps - An Old Country Domain | 062 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| An Old Country Farm | | Cthulhu Maps - An Old Country Farm | 012 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| An Old Covered Bridge | | Cthulhu Maps - An Old Covered Bridge | 083 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| An Old Dam and a Sewer System | | Cthulhu Maps - An Old Dam and a Sewer System | 042 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Old Damned House | 116-147 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | Connecticut; 1920s; Tsathoggua |
| The Old Dark House | 60-67 | Alone on Halloween | PAG1000 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Old Fellow That Bunyip | 71-91 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | Australia; October; 1925; Greater Race |
| Old Flames | 3-10 | Old Flames | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Halloween; 1020s |
| An Old Friend | 2002 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Old Ghost | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Old Hags | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Old House | | Nightwatch | 1 | Nov 1992 | Self Published | Call of Cthulhu (Classic) | Maine; 1920s |
| Old Man Tompkins | | Old Man Tompkins | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | July |
| An Old Mine | | Cthulhu Maps - An Old Mine | 041 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Old One | 119-148 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Old Ones and Old Gods | 72-75 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Old Ones' Signs | 106-130 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Old Ones? Signs | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Old Serpent | 29-36 | Role Player Independent | 12 | Nov 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | 1939 |
| The Old Serpent | 19-33 | Role Player Independent | 13 | Dec 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | 1939 |
| The Old Serpent | | Role Player Independent | 14 | Feb 1994 | Symbiosis Publishing | Call of Cthulhu (Classic) | 1939 |
| The Old Straight Track | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England; 1925 |
| The Old Straight Track | 14 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England; 1925 |
| The Old Straight Track | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England; 1925 |
| An Old Straight Track | | An Old Straight Track | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| An Old Train | | Cthulhu Maps - An Old Train | 005 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Olitiau | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| On a Wing and a Wave | | On a Wing and a Wave | | 2011 | Drakat Games | Call of Cthulhu (Classic) | |
| On Air | 4-12 | On Air | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| On Becoming an Investigator | 6-47 | 1920s Investigator's Companion Vol. II | CHA2346 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| On Cultists | B:10-12 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| On Cultists | 104-106 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| On Cultists | 155 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| On Hallowed Time | | On Hallowed Time | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | Arkham; Halloween |
| On Hostile Shores | | On Hostile Shores | | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | French Polynesia; 1930 |
| On Keeping Masks of Nyarlathotep | 20-28 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| On Keeping Masks of Nyarlathotep | 20-28 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| On the Anti-Libertarian Nature of Cthulhu Worship | 12-13 | Valkyrie | 1 | Sep 1994 | Partizan Press | Call of Cthulhu (Classic) | |
| On the Banks of the Ohio | | On the Banks of the Ohio | | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| On the Eastbound Train | 198-210 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| On the Name 'Dagon' | 20-22 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| On the Nature of Ponies | 6 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| On the Road Again | 444-457 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| On the Road Again | 572-586 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| On the Threshold of Chapel Perilous | | The Once and Future King | | 1999 | Self Published | Call of Cthulhu (Classic) | |
| On the Ubiquity of Cthulhu | 5-6 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| On the Wings of Madness | 5-17 | Whispers from the Abyss | T-4 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Atlantic Ocean; 1933; April |
| A Once and Future King | 11-16 | The Whisperer | 1 | Sum 1999 | Severn Valley Press | Call of Cthulhu (Classic) | London; April; 1900 |
| Once Bitten | 1996 | Roleplay, What, Who, Why and Where? | | | Self Published | Call of Cthulhu (Classic) | Massachusetts |
| Once Risen, Twice Shy | 17 | White Dwarf | 66 | Jun 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| One Doesn't Say Its Name | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| One in Darkness | 75-86 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | Boston; Nyarlathotep |
| One Less Grave | | One Less Grave | | Nov 2020 | Chaosium | Call of Cthulhu (Classic) | England |
| One Man's Meat: Making the most of Poision in Role Playing Games | 52-54 | The Adventurer | 6 | Jan 1987 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| One of Us | 1-39 | One of Us | | 2008 | Self Published | Call of Cthulhu (Classic) | Missouri; October; 1930 |
| One Page Sanity Loss | | One Page Sanity Loss Flowchart | | Apr 2020 | Chaosium | Call of Cthulhu (Classic) | |
| One Step Further | 4-12 | One Step Further | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The One Who Crawls in the Night | 20-59 | Dark Visions From Beyond | 0 | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The One(s) That Got Away | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| One-eyed Goblins | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Oni | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Online Play | 89-90 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Only After Dark | 23-42 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Onto the Ice | 98-113 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; 1933; October |
| Onward to Endurance | 73-84 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Alaska; 1929 |
| The Ooze | 112-127 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | Pennsylvania; 1925 |
| Open Season | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Opener of the Way | 49-61 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Opening Bid | 5-25 | Opening Bid | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Washington; 1925 |
| Opening Night | 19-27 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | London; 1928; October |
| Opening Scenes | 18-25 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | London; 1927 |
| An Opium Den | | Cthulhu Maps - An Opium Den | 075 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Or, A Dragon Passant, Sable | 32-35 | The Last Province | 4 | Jun 1993 | Last Province Publishing | Call of Cthulhu (Classic) | |
| The Oracle of Sadoqua | 149-165 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Order of the Stone | 61 | Fictional Reality | 12 | Jun 2003 | Self Published | Call of Cthulhu (Classic) | United Kingdom; 1930s |
| The Order of Thebes | 62-68 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Organ Doner | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| The Orient Express | A:1-4 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| The Orient Express | A:11-18 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Orient Express | A:9-14 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Orient Express Operations | A:15-34 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Orient Express Tickets | | Orient Express Tickets | | Sep 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Orientation | 9-15 | The Compact Arkham Unveiled | CHA2356 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Orientation | 6-13 | Arkham Unveiled | CHA2325 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Orientation | 9-17 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Original, the Eternal, the Undying | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ormuddah's Gifts | | Ormuddah's Gifts | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Orne Library | 1-5 | Orne Library | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Orphanage | 3-10 | The Orphanage | | Dec 2019 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Orpheus Club | 1 | The Orpheus Club | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Osbrook House | 120-126 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | New Jersey; 1929 |
| The Osiris Club | 161-186 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | Los Angeles; 1947 |
| Osterhase | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Gaslight), GURPS, Call of Cthulhu (Now), Advanced Dungeons and Dragons (Ravenloft), Call of Cthulhu (Invictus), Paranoia, Call of Cthulhu (Classic), Call of Cthulhu (Strange Aeons) [Future], Star Wars | |
| Other Cities in Japan | 156-217 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Other Occupations | B:10 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Other Occupations | 104 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Other Scenarios for Ponies | 34 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Other Senses | 18-19 | Different Worlds | 28 | Apr 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Other Towns of Interest | 114-117 | Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) | |
| The (Other) Masks of Nyarlathotep | 50-52 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The (Other) Masks of Nyarlathotep | 56-59 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Ouch! The Messy Problem of PC Injury | 4-8 | Demonground | 12 | Jun 2001 | Self Published | Call of Cthulhu (Classic) | |
| Our Curious Masters | | Our Curious Masters | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | England; 1926 |
| Out For Blood | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Out of Retirement | 122-124 | Bayt al Azif | 6 | Feb 2026 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Out of the Blue | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Out of the Celtic Twilight | 46-57 | Whispers in the Dark | 0003 | Oct 1993 | Triad Entertainments | Call of Cthulhu (Classic) | Scotland; April; 20th Century AD |
| Out of the Dark Realms in Between | 112-115 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | |
| Out of the Mouths of Babes and Children | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Out of the Ordinary | 7-? | Shadis | 41 | Oct 1997 | Alderac Entertainment Group | Call of Cthulhu (Classic) | |
| Out of the Past | | Out of the Past | | May 2019 | Chaosium | Call of Cthulhu (Classic) | England; 1925 |
| An Outbreak of Cancer | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Wales |
| An Outbreak of Cancer | 13-14 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Wales |
| An Outbreak of Cancer | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Wales |
| An Outbreak of Cancer | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Wales |
| The Outer Boroughs | 99-132 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Outlying Areas | 127-136 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Outpost of Progress | 73-78 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| The Outsider Within | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Outsiders and Psychic Abilities | 147-172 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Over Exposure | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Overdue | 47-52 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | Arkham |
| Overdue | 30-42 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Overview | 7-14 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | |
| Overview and Scenario Background | 5-10 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | |
| An Overview of Arkham | 11-24 | Arkham | CHA23182 | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | |
| An Overview of Ireland 1919-1930 | 6-9 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| An Overview of Ireland 1919-1930 | 21-22 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| An Overview of the Game | 5-10 | Call of Cthulhu 7th Edition Quick Start | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Overview of the Game | A:3-5 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Overview of the Game | A:3-5 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Owlman | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Paddington Horror | 12-13 | White Dwarf | 88 | Apr 1987 | Games Workshop | Call of Cthulhu (Classic) | London; 1920s |
| Pain Threshold | | Pain Threshold | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | Louisiana; 1920s; Mi-Go |
| Painted in a Corner | 28-33 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Dark Young of Shub-Niggurath |
| A Painted Smile | 42-50 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| The Painter | | The Home of Jonas Steverud | | | Self Published | Call of Cthulhu (Classic) | Mi-Go |
| The Painting and the Statue | 1998 | Ubar | | | Self Published | Call of Cthulhu (Classic) | Pacific Ocean |
| Paititi | | Paititi | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | Brazil; March; 1926 |
| The Pale God | 87-99 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | Arkham; Eihort |
| The Pallid Masque | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Palmer's Orchard | D:1-10 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; 1922; Summer |
| Pandora's Box | 176-204 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | 1930s |
| The Pangboche Hand | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Panic in the Building | | Cthulhu Maps - Panic in the Building | 040 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Pannikin Requiem | 7-25 | The Pannikin Requiem | | May 2020 | Chaosium | Call of Cthulhu (Classic) | New York State; 1929; August |
| Paper Chase | 28-30 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | Michigan; Ghoul |
| Paper Chase | 147-150 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Michigan; Ghoul |
| Paper Chase | C:7-18 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | Michigan; Ghoul |
| Paper Chase | 100-101 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Paper Chase | C:7-18 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | Michigan; Ghoul |
| The Paper Under the Bed | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Paper Woman | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Papyrus of Nephren-Ka | 215-223 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Papyrus of the Dark Wisdom | 258-272 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Parade of Ghouls | | Cthulhu Maps - The Parade of Ghouls | 024 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Paradigms - Theories of the Unexplained | 23-25 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Paramour of Y'golonac | 22-23 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Paramour of Y'golonac | 104-105 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Paranoia Files | 6-7 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Paranoia Files | 4-5 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Paranoia Files | 4-5 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Paranoia Files | 14-15 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Paranoid Guy | 67-68 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Parapsychology | 4-15 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Parapsychology in the Lab | 69-71 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| Parapsychology in the Laboratory | 16-19 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| Parasitic Mind Control Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Parasitic Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Parasitic Spawn of Tsathoggua | | Chaosium Digest | v23n07 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | |
| A Parcel Of Darkness | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Parent and Child | 101-102 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| A Park in the City | | Cthulhu Maps - A Park in the City | 023 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| The Parsonville Horror | | The Parsonville Horror | | Sep 2018 | Chaosium | Call of Cthulhu (Classic) | Kentucky; 1928 |
| The Party | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Party Favour | | Party Favour | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | Australia; 1932 |
| Pass the Giggle Water | | Pass the Giggle Water | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Spring; 1929 |
| Passenger Olympus | | Passenger Olympus | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Gulf of Mexico; November; 1921 |
| Past Lives, Future Deaths | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| Pathogen | Nov 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Paths of Our Forefathers | 73-76 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Virginia; 1991 |
| Pax Cthuliana Handouts | | Pax Cthuliana Handouts | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | |
| Pax Cthuliana Soundtrack | | Pax Cthuliana Soundtrack | TSG OST 0001 | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | |
| Pazuzu | 101-102 | Ye Booke of Tentacles | 1 | 1998 | The Chaos Society | Call of Cthulhu (Classic) | |
| PC Casualties | | Chaosium Digest | v01n04 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| A Peaceful Cruise | | A Peaceful Cruise | | Jul 2019 | Chaosium | Call of Cthulhu (Classic) | Caribbean Sea; 1920s |
| The Peacock Cargo Ship | | Cthulhu Maps - The Peacock Cargo Ship | 031 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Peculiar Personalities | 14-15 | Papyrus | 14 | Apr 1994 | Self Published | Call of Cthulhu (Classic), GURPS | |
| Pedaruacht | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Pen And Ink | 24-29 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Pennywise the Clown | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| People | 27-33 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Trail of Cthulhu, Call of Cthulhu (Classic) | |
| People and Creatures | 71-94 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| People at M.U. | 48-51 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| People in Egypt | 78-84 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The People of London | A:40-68 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The People of London | B:53-82 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| People of the '20s VTT Tokens | | People of the '20s VTT Tokens | | Feb 2022 | Chaosium | Call of Cthulhu (Classic) | |
| People of the Light | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| People of the Monolith | 136-139 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Hungary |
| People of the Monolith | 62-65 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Hungary |
| People of the Monolith | 144-146 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| People of the Monolith | 135-136 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The People of the Monolith | | The People of the Monolith | | May 2023 | Chaosium | Call of Cthulhu (Classic) | Hungary |
| The People of the Monolith Paradox | 147-150 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The People of the Monolith Paradox | 122-125 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| People on Campus | 77-130 | Miskatonic University | CHA2389 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Percentile Modifiers and Levels for CoC | Jan 2002 | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic) | |
| Perditii | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Perfect Non-Player Character | 124-126 | Worlds of Cthulhu | 6 | Jan 2009 | Pegasus Press | Call of Cthulhu (Classic) | |
| Perfect Skin | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| The Perfect Soldier | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Perfume of the Garden of Happiness | 37 | Re:Quest | 25 | Dec 1991 | RolePlaying Games SIG of America Mensa | Call of Cthulhu (Classic) | |
| Period Pains | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Persian Club | 13-18 | Role Player Independent | 7 | Jun 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | |
| Personalities | 187-190 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Personalities | 212-216 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Personalities from Lovecraft's Tales | 138-142 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| The Personality of Cults | 12-15 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Personality Profiles | 137-200 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Persons of Note | 35-38 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Peru | 47-90 | Masks of Nyarlathotep | CHA23153 | 2018 | Chaosium | Call of Cthulhu (Classic) | Peru; 1921 |
| Pest Trouble | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Pest Trouble | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Petrification | Jun 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Peverill Manor | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Peverill Manor | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| Peverill Manor | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Phantasmagorial Art Pack | | Phantasmagorical Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| The Phantom Jungle | 1-21 | The Phantom Jungle | | Feb 2022 | Self Published | Call of Cthulhu (Classic), GURPS | Peru; 1936 |
| The Phantom of Wilson Creek | 6-15 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| The Phantom of Wilson Creek - 1925 | 37-44 | The Phantom of Wilson Creek | | May 2023 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1925 |
| The Phantom of Wilson Creek and Other Tales | 7-36 | The Phantom of Wilson Creek | | May 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Phantom Train | | The Phantom Train | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) | Rhode Island; Summer; 1920s |
| Phantoms of No Man's Land | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Pharaoh's Sacrifice | | The Pharaoh's Sacrifice | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1920s |
| The Pharoah's Curse | 13-14 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Pharos | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Phennor Fragments | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Philtre Tip | 269-275 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Phobias | | Phobia Deck | CHA23139-KD1 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Phobias | | Keeper Decks | CHA23139-KD | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Phobias | | Keeper Decks | CHA23184 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Phobias | | Phobia Deck | CHA23184-KD1 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Photographer | 112-119 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | |
| Phun with Phobias: Making the Most of Insanity in Call of Cthulhu | 37-42 | Dagon | 21 | Mar 1988 | Self Published | Call of Cthulhu (Classic) | |
| Pickman's Legacy | | Pickman's Legacy | | Jul 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Piercing the Veil | 186-190 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Call of Cthulhu (Classic), Pathfinder, Dungeons and Dragons | Pennsylvania; 1919 |
| Pines and Sunshine | 335-347 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | New England; 1990s |
| The Pink Drink | 39 | Serendipity's Circle | 7 | Mar 1996 | Self Published | Call of Cthulhu (Classic) | |
| The Pink Drink | 3 | Serendipity's Circle | S2 | 1996 | Self Published | Call of Cthulhu (Classic) | |
| Pishtaco the Ravenous | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Pits of Bendal-Dolum | 3-18 | Terror from the Stars | CHA2313 | 1986 | Chaosium | Call of Cthulhu (Classic) | Honduras; 1920s |
| The Pits of Bendal-Dolum | 71-86 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Honduras; 1920s |
| Places | 41-42 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Trail of Cthulhu, Call of Cthulhu (Classic) | |
| Plague Martyrs | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Plague of Scratches | 1-2 | The Plague of Scratches | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Plague of the Pharaohs | | The Plague of the Pharaohs | | Sep 2021 | Type40 | Call of Cthulhu (Classic) | Egypt |
| Plagued By Dreams | 55-57 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Plagued by Dreams | 30-32 | Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) | |
| Plagued by Dreams | 89-91 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Planes, Trains and Automobiles | 30-34 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Planetfall on Yuggoth | 244-247 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Planetfall on Yuggoth | 258-261 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Plans form the XXth Century | | Plans from the XXth century | 3001b | 2010 | Three Fourteen Games | Trail of Cthulhu, Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| Plant Walker | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Plantation | 18-53 | Mansions of Madness | CHA2327 | 1990 | Chaosium | Call of Cthulhu (Classic) | South Carolina; Yig |
| The Plantation | 18-53 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | South Carolina; Yig |
| The Plated Skull | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Player Occupations | 54-57 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Players | 21-30 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Playing Children in CoC | | Chaosium Digest | v06n07 | May 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Playing During the Irish Wars | 9-11 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Playing Revenants | 27-38 | Cthulhu Live: Lost Souls | 0005 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Playing the Alien | 17-18 | Polyhedron | 44 | Nov 1988 | TSR | Call of Cthulhu (Classic) | |
| Playing the Bad Guys | | Chaosium Digest | v06n04 | Apr 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Playing the Game | 184-220 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Playing the Game | 47-68 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Playing the Game | 37-52 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Playing the Game | 27-39 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Playing the Game | 184-220 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Playing the Game | 88-95 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Plot Thickens | 5 | The Unspeakable Oath | 20 | Jun 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Plot Thickens | 153 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Pnakotic Manuscripts | 151-155 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Pnakotic Manuscripts | 137-140 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Pocong | May 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Poisoned Sailor | | Chaosium Digest | v16n06 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Poisoned Sailor | 39-40 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Poisoned Sailor | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Poiton for Father Moloch | 67-77 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | Ireland; Summer |
| Poiton for Father Moloch | 145-153 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Ireland; Summer |
| The Police | 43-45 | The 1990s Handbook | CHA2355 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Politics | 59,61 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Polyonymous and The Stalker | 1 | Polyonymous and The Stalker | | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Ponape Predators | 16-17 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Ponape Scripture | 35-42 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Ponies Save the Universe! | 35-41 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Pony Haunting | 16-23 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Pony Paper Chase | 24-33 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Poor | 65 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Pope Lick Moster | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Popobawa | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Portal | | Cthulhu Maps - The Portal | 110 | Dec 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Portrait of Reverend Grey | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Possession | 1-12 | The Possession | | 2013 | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| The Possession | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| Postcard - Peru - Masks of Nyarlathotep | | Post Card - Peru - Masks of Nyarlathotep | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Postcards | | Cthulhu Britannica London: Postcards | CB7356 | 2017 | Cubicle 7 | Call of Cthulhu (Classic) | |
| The Postman Always Rings Twice | Feb 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Potential Problems in LARPs | 1996 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Power Cut | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Power of Attorney | | Chaosium Digest | v19n02 | May 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Power Trip | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Pre-Generated Characters | 10-11 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Pre-Generated Investigators | 126-136 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Preacher and the Cross | 1-37 | The Preacher and the Cross | | 1990 | ADP Systems | Call of Cthulhu (Classic) | Boston; March; 1925 |
| Preacher Man | 73-94 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | South Carolina; 1951 |
| Preacher Man | Mar 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Preacher-Man | | Preacher-Man | | 2013 | Arcane Footpad | Savage Worlds (Realms of Cthulhu), Call of Cthulhu (Classic), Trail of Cthulhu | England; 1924 |
| Preface to the Al-Azif | 123-127 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Preface to the Al-Azif | 185-191 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Prehistoric (Before 3000 BC) | 7-8 | From the Library of the Playhouse | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Prehistory of New England | 43-58 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Preludium | 14-17 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | London; 1927 |
| The Premiere of the King | | The Premiere of the King | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1920s |
| Preparation | 13-20 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Prepared Investigator | | The Prepared Investigator | | Jul 2018 | Stygian Fox | Call of Cthulhu (Classic) | |
| Presenting The Cousins | 13-17 | The Eldritch New England Holiday Collection | GGP2005 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Preserves | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Presidents of the 1920s and the Mythos | 13-14 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Previous Experience | C:10-14 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| The Price is Right | 13 | White Dwarf | 70 | Oct 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| The Price of Murder | 187-190 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Prices and Cash | B:20-21 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Prices and Cash | 111-112 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Prices and Cash | C:20-21 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Prices and Cash | 140-141 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Prices for the Roaring 20s | 30-31 | Dragon | 95 | Mar 1985 | TSR | Call of Cthulhu (Classic) | |
| Prices on the Orient Express | 12 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Pride of Yirrimburra | 52-70 | Terror Australis | CHA2319 | 1987 | Chaosium | Call of Cthulhu (Classic) | Australia |
| The Priestess | 43-54 | Last Rites | CHA2379 | 1999 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1990s |
| Primogeniture | 39-47 | Drow | 1 | Dec 1992 | Creative Aspects | Call of Cthulhu (Classic) | 1920s |
| The Prince of Darkness: Roleplaying Count Dracula | 21-23 | Space Gamer | 74 | May 1985 | Steve Jackson Games | Champions, The Fantasy Trip, Call of Cthulhu (Classic), Traveller (Chthonian Stars) | |
| The Princess Claire | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | At Sea |
| The Prisoner's Dilemma | | The Prisoner's Dilemma | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | England; 1919; January |
| The Prisoner's Dilemma | | Albion's Ruin Vol 1 | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | England; January; 1919 |
| Prisoners' Dilemma | 5-33 | Prisoners' Dilemma | | Mar 2021 | Chaosium | Call of Cthulhu (Classic) | Russia; 1929 |
| Prisons | 13-18 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Prisons | 149-151 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Private Dining | | Private Dining | | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | New York; July; 1926 |
| A Private Gathering | | Cthulhu Maps - A Private Gathering | 106 | Oct 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Professions | 19-24 | Bloodmoon's Guide to Historical Fashions: 1920s | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Professor Gould Has Gone Batty! | 3-16 | Professor Gould Has Gone Batty! | | Jan 2026 | Chaosium | Call of Cthulhu (Classic) | Arkham; Summer; 1920s |
| Professor of Nyogtha | 46-52 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Classic) | Hungary; May; 1928; Nyogtha |
| Progeny | | Progeny | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1933 |
| Prohibition | 9-53 | The Keeper's Companion Vol 2 | CHA2395 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Prohibition and Bootleggers | 89-97 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | |
| Project Covenant | 94-99 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Project Covenant | 98-103 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Prologue | 17-37 | Heinrich's Call of Cthulhu Guide to Carosa | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Carcosa |
| Proof of Life | 63-86 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Massachusetts; Mi-Go |
| Proof of Life | 73-100 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Massachusetts; Mi-Go |
| The Prop Room | | The Prop Room | | 2020 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Property and Real Estate | 131-140 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Property Values | 19 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Property Values | 101 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Prophecy | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England; Hastur |
| Prophecy, Part One | | Chaosium Digest | v12n08 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) | England; Hastur |
| Prophecy, Part Two | | Chaosium Digest | v12n09 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) | England; Hastur |
| Props and Costumes | 95-152 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Props and Handouts | 91-100 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Proteges and Last Wills and Testaments | | Proteges and Last Wills and Testaments | | Aug 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Proteus institute for Esoteric Studies | | Maps for Investigator headquarters - Proteus institute for Esoteric Studies | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Proti Lexi | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Provender of the Gods | 60-121 | The Realm of Shadows | PAG1006 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; 1940s; Ghoul |
| Providence, Rhode Island | A:18-31 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Providence; May; 1927 |
| Providence, Rhode Island | 24-51 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Providence; May; 1927 |
| Psalms of the Silent | 274-300 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Psychiatric Interview | 33-42 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Psychic Powers | 8-12 | Different Worlds | 26 | Jan 1983 | Chaosium | Call of Cthulhu (Classic) | |
| The Psychic Powers of Investigators | 7-9,6 | The Whisperer | 1 | Sum 1999 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Psychic Vampires | 89-95 | A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Psychical Research | 48-60 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Psychics | 87-95 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| Psychopathy | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| Public Health | 19 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| A Public Library | | Cthulhu Maps - A Public Library | 104 | Sep 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Puka Stone | 92-101 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Pukwudgies | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Pulp | | Big A** Book of Hooks | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp and Noir Characters | 19-36 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| The Pulp and Noir Genres | 5-18 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Pulp Archetypes by Occupation | Mar 2023 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Pulp Cthulhu Damage Rules | | Pulp Cthulhu Damage Rules | | Sep 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp Cthulhu Talents | Apr 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Pulp Cthulhu: Heroes' New Talents! | | Pulp Cthulhu: Heroes' New Talents! | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp Cthulhu: The Truth Behind the Setting | 18-19 | Game Trade Magazine | 102 | Aug 2008 | Alliance Game Distributors | Call of Cthulhu (Classic) | |
| Pulp Magic, Psychic Powers, and Weird Science | 81-89 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp Organizations | 44-59 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp Sanity | 74-80 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Pulp Villains and Characters | 121-134 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Pulps | 9-14 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Punitive Measures | 101-111 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | New Mexico; 1916; Yig |
| The Purple Jacket | | The Purple Jacket | | Aug 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Pursuit in a Lost Village | | Cthulhu Maps - Pursuit in a Lost Village | 051 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Pursuit in New York | | Cthulhu Maps - Pursuit in New York | 045 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Pursuit on the Canal | | Cthulhu Maps - Pursuit on the Canal | 064 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Pursuit to Kadath | 5-56 | Pursuit to Kadath | T-3 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Arkham; April; 1923; Yig |
| The Puzzle Boxes | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Pygmalion | Dec 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Pyramid Scheme | 35-72 | A Time for Sacrifice | NCG-TFS-HC-01 | 2020 | New Comet Games | Call of Cthulhu (Classic) | New York; Mexico; 1931 |
| The Qaanaaq Tupilak | | The Qaanaaq Tupilak | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Quarantine | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Queen in Red | 37 | Stark, Raving Mad! | | 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Queen of Night | 75-114 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | 1927 |
| A Question of Meaning | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Quick and the Dead | | Chaosium Digest | v37n08 | Apr 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Quickening Spiral | 89-108 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| Quirk Skills | 42-43 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Quotes from Call of Cthulhu Adventures | 9 | Opifex Bimonthly | 12 | Mar 1998 | Self Published | Call of Cthulhu (Classic) | |
| Rabat | 15-29 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Rabat | 15-30 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Radio Killed Verna Starr | | Radio Killed Verna Starr | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | Pennsylvania; August; 1925 |
| Radio Theatre Murder Mystery | | Radio Theatre Murder Mystery | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) | Boston; July; 1926 |
| Radio Theatre Murder Mystery | 56-76 | American Empire | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Boston; 1926; July |
| Raggedy Clothes ad Worn Out Shoes: A Look at the American Hobo | 36-41 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Railway Coaches | B:16-17 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Railway Coaches | 95 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Railway Coaches | C:16-17 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Railways | 41-42 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The Rake | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ramblings of a Disorganized Mind | 22-24 | Valkyrie | 4 | Dec 1994 | Partizan Press | Call of Cthulhu (Classic) | |
| Randolph Carter College for Anime-Punk | | Randolph Carter College for Anime-Punk | | Aug 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Randolph Pierce Foundation | 52-66 | The Unspeakable Oath | 6 | Aug 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Rapture in Black | 178-188 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Rare Finds | 54-61 | Tomes of Terror | | Jun 2018 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| The Rat King, avatar of Mordiggian | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Rat-Things and Worse Horrors | 41-49 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Raven at Birmingham's | 29 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Reading of a Will | | The Reading of a Will | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | England; 1923 |
| Reading on the Road | 587-598 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Reading on the Road | 458-468 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Real History of Los Angeles | 8-30 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Real Imaginary Friend | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Real Metal Token Frames | | Real Metal Token Frames | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Real Occult Books for CoC | | Chaosium Digest | v05n10 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Real-Time Combat | 81-94 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| The Realm of Shadows Player Aid Kit | | The Realm of Shadows Player Aid Kit | RSPA | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Reanimated | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| The Reanimator Returns | 1-26 | The Reanimator Returns | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | June; 1933 |
| Reasons PCs Leave | May 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Rebooting Campaigns With a Modern Sensibility | 31-32 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Recipe for Obsession | | Recipe for Obsession | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Recluse | 146-167 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Recommended Reading | 39 | White Dwarf | 72 | Dec 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| Recovering Sanity | 82 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Recreation | 102-106 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Recreation | 66-69 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Red Nun of St Frideswide's Priory | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Red Rover, Red Rover | | Serendipity's Circle | 17 | | Self Published | Call of Cthulhu (Classic) | |
| Red Silk Ghost | 53-60 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Asia |
| Red Valley | 31-47 | Sun Spots | 4 | 2017 | Weird 8 | Call of Cthulhu (Classic) | Massachusetts; 1926 |
| Redmalkin - The Demon Cat of Ulthar | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Reeling Midnight | 9-27 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Arkham; 1920s; Atlach-Nacha |
| The Reeling Midnight | 9-28 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Arkham; 1920s; Atlach-Nacha |
| Reference | 224-261 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Reference | 106-249 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Reference | 106-249 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Reference | 106-249 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Reference Material | 82-85 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Reformatted for Yellow Cubes | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Refractions of Glasston | | Refractions of Glasston | | Dec 2019 | Taylor University Professional Writing | Call of Cthulhu (Classic) | Indiana; 1920s |
| Refugees From the Sunken Land | | Chaosium Digest | v36n04 | May 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Regents | Apr 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Regiment of Dread | 26-41 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Arkham; August |
| Religion and Beliefs of Tibet | 16-33 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Religion in Fantasy Gaming: Religion for Call of Cthulhu PCs | 34-35 | The Adventurer | 7 | Feb 1987 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | |
| Remains to be Seen | 52-82 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; 1932; October; Vampire |
| Remember, Remember | 42-52 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | London; November; 1930s |
| Rememberance of Things Past | | Hypergraphia | 1 | Nov 2018 | Gladius Games | Call of Cthulhu (Classic) | |
| A Rendering from the Arabic | 8-24 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Repairer | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Repairer of Reputations | 11-37 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Repairer of Reputations | 14-41 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Replies on Sanity | | Chaosium Digest | v01n10 | Mar 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Report of Delusions of an Invisible Monster | 23-25 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | Arkham |
| Report of the Committee Appointed to Investigate Phenomena Connected With the Theosophical Society | 155-249 | The Book of Dzyan | CHA6027 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Repossession | D:146-157 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | Bulgaria; 1923 |
| Repossession | D:7-38 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | Bulgaria; 1923 |
| Repossession | B:197-224 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Classic) | Bulgaria; 1923 |
| The Reptile House | 28-30, 32-33 | Games Master International | 15 | Oct 1991 | Newsfield | Call of Cthulhu (Classic) | 1920s; Serpentman |
| Requiem for Shaggai: A History of the Devil's Opera | 16-19 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Requiem for the Burning God | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| The Rescue | 38-45 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | Werewolf |
| The Rescue | 158-165 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | Werewolf |
| Rescue | 107-114 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Research | 34-35 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Research | 48 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Research & Resources | 18-27 | 1920s Investigator's Companion Vol. I | CHA2343 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Research Logs of the Kenning Expedition | 25-45 | Twilight Memoirs | CHA0325 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| A Research Project | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| Researches | 156-163 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Residence of Mr Finkle | | Cthulhu Maps - The Residence of Mr Finkle | 028 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Resources | 6-38 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Resources | 2-27 | The Realm of Shadows | PAG1006 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Resources | 103-104 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Resources for 1920s Australia | 63-84 | Terror Australis | CHA23155 | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| A Restoration of Evil | 4-22 | Keeper's Screen | CHA2387 | 2000 | Chaosium | Call of Cthulhu (Classic) | New York; 1928; Tulzscha |
| Resurrection Mary | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Resurrection Men | 115-126 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | Scotland; 1920s |
| The Resurrection of Kzadool-Ra | 207-? | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Resurrection Spell: Bringing Back The Dead | | Chaosium Digest | v32n12 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) | |
| The Return of Cyris Crane | 3-12 | The Return of Cyris Crane | | 2017 | Skirmisher Publishing | Call of Cthulhu (Classic) | Arkham; 1917 |
| The Return of Doctor Moreau | 32-48 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | Pacific Ocean; 1920s; Mi-Go |
| The Return of Doctor Moreau | | The Return of Doctor Moreau | | 2006 | Self Published | Call of Cthulhu (Classic) | Oceania; 1920s |
| The Return of Hastur | 248-270 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Return of Hastur | 262-270 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Return of the Headless Horseman | 26-33 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | New York State; 1924; Halloween |
| Return of the Hound | | Return of the Hound | | 2006 | ADP Systems | Call of Cthulhu (Classic) | England; 1925 |
| The Return of the Hounds | 64-124 | The House of R'lyeh | CHA23127 | 2013 | Chaosium | Call of Cthulhu (Classic) | England; March; 1922 |
| Return of the King | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Nevada |
| The Return of the Magician | 34-44 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Return of the Past | | Chaosium Digest | v20n12 | Aug 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Return to Dunwich | 2-13 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Return to Dunwich | 140-150 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | Dunwich; 1929 |
| Return to Lake's Camp | 235-243 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933 |
| Return to Ravenstone Sanitarium | 40-65 | Ravenstone Sanitarium | CHA0350 | 2008 | Chaosium | Call of Cthulhu (Classic) | New England; 1920s |
| Return to the Island of Dr Moreau | | Return to the Island of Dr Moreau | | Aug 2019 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean |
| Return to the Monolith | | Return to the Monolith | | Mar 2018 | Chaosium | Call of Cthulhu (Classic) | Hungary; 1990s |
| Return to the Monolith, Part 1 | | Chaosium Digest | v25n02 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Hungary; 1990s |
| Return to the Monolith, Part 2 | | Chaosium Digest | v25n03 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) | Hungary; 1990s |
| Return to Tonga | 115-125 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Tonga; 1991 |
| Return to Y'ha-nthlei | 88-105 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Return to Yellow Buck Mountain | 37-48 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1926; Ghoul |
| Return to Yellow Buck Mountain -1926 | 45-52 | The Phantom of Wilson Creek | | May 2023 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1926; Ghoul |
| The Returned | 5-13 | The Returned | | May 2022 | Chaosium | Call of Cthulhu (Classic) | Boston |
| Reunion | | plateau-of-leng.demon.co.uk | | | Self Published | Call of Cthulhu (Classic) | England; 1990s |
| The Reunion | | The Reunion | | Jul 2020 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1929; Mi-Go |
| The Revelation of Rasputin's Remains | 186-190 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Revenant Characters | 11-26 | Cthulhu Live: Lost Souls | 0005 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Revised Sanity Rules | | Chaosium Digest | v34n03 | Jun 2001 | Chaosium | Call of Cthulhu (Classic) | |
| The Revival | 50-62 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Canada; 1920s; Winter; Serpentman; Gnoph-Keh |
| The Revival | | Nyarlathotep Web Designs | | | Self Published | Call of Cthulhu (Classic) | The Netherlands; 1920s; Winter |
| Revolver | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Rewards for Valor | B:86 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Rewards of Success | B:22 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Rewards of Success | B:22 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Rhan-Tegoth: A New Deity for Call of Cthulhu | 30-31 | Fantasy Gamer | 3 | Dec 1983 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| Rhyme With Dark Reason | | Rhyme With Dark Reason | | 2004 | Self Published | Call of Cthulhu (Classic) | Deep One |
| A Riad in the Desert | | Cthulhu Maps - A Riad in the Desert | 016 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Richard Laymon's Amara | Jun 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ride a Crane West | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| The Ride Home | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Riding the Northbound | | Riding the Northbound | GGP1909 | 2019 | Golden Goblin Press | Call of Cthulhu (Classic) | Massachusetts; November |
| Rifles | 62-75 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Right Hand Path | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Right Monster, The Right Adventure | 81-84, 86, 118 | Dragon | 223 | Nov 1995 | TSR | Call of Cthulhu (Classic) | |
| Rigid Air | 44-55 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | Canada; 1920s |
| The Ring of Blood Stone | | Hit Points | 6 | Jan 1992 | National Association for the Advancement of Role Playing Games | Call of Cthulhu (Classic) | |
| The Ring of Blood Stone | | The Familiar | 4 | Jun 1995 | Self Published | Call of Cthulhu (Classic) | |
| Riot at Red Plank | | Riot at Red Plank | GGP1803 | 2018 | Golden Goblin Press | Call of Cthulhu (Classic) | Michigan; 1904 |
| The Ripper | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | England |
| The Ripper | 10 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Ripper | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Rise of M'Bakadala, He Who Swims and Eats without Mouth | 99-104 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; 1920s |
| The Rise of R'lyeh | 57-62 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1920s; Cthulhu |
| The Rise of R'lyeh | 126-135 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1920s; Cthulhu |
| The Rise of R'lyeh | 57-62 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1920s; Cthulhu |
| Rise of the King | 175-198 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; June; 1926 |
| Rise of the Ophidian Empire | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | London; 1887; Serpentman |
| Rise of the Ophidian Empire, Part 1 | | Chaosium Digest | v33n05 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) | London; 1887; Serpentman |
| Rise of the Ophidian Empire, Part 2 | | Chaosium Digest | v33n06 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) | London; 1887; Serpentman |
| Rise of the Ophidian Empire, Part 3 | | Chaosium Digest | v33n07 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) | London; 1887; Serpentman |
| Rise of the Ophidian Empire, Part 4 | | Chaosium Digest | v33n08 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) | London; 1887; Serpentman |
| Rise of the Sleeper | 1-28 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | Florida; October; 1920s; Glaaki |
| The Rise of Xnaaki | 1-16 | The Unbound Book | 0 | Aug 2002 | Unbound Publishing | Call of Cthulhu (Classic) | Arkham; Summer; 1920; Great Old One |
| Rising from the Stars | | Rising from the Stars | | Nov 2020 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| The Rite of Goff'nn Hupadgh | 55-99 | Opifex Bimonthly | 21 | Sep 1999 | Self Published | Call of Cthulhu (Classic) | New York; March; 1920 |
| Rites of Transformation | 4-10 | Rites of Transformation | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Ritual Curses | 4 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Ritual Curses | 177 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Rituals, Rites and Ceremonies: All Hail the Dark Ones | 21-25 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Rival Congo Expeditions | 9-22 | Secrets of the Congo | CHA0387 | 2010 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The River of Night's Dreaming | 54-83 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The River of Night's Dreaming | 60-93 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Rlim Shaikorth | | Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) | |
| Road Kill | 40-48 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Minnesota; 1925; July |
| Road Rage | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Road to Hali | 18-30 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Road to Hali | 46-57 | Crypt of Cthulhu | 89 | 1995 | Necronomicon Press | Call of Cthulhu (Classic) | |
| Roadkill | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Roadkill | 34 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Roadkill | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Roadside Assistance | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Roaring 20's Femme Fatale Generator | | Roaring 20's Femme Fatale Generator | D10D-G018 | 2021 | D10 Dimensions | Call of Cthulhu (Classic) | |
| Roaring 20's Speakeasy Generator | | Roaring 20's Speakeasy Generator | D10D-G017 | 2021 | D10 Dimensions | Call of Cthulhu (Classic) | |
| The Roaring Twenties | 8-17 | 1920s Investigator's Companion Vol. I | CHA2343 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Roaring Twenties | 5-14 | The 1920s Investigator's Companion | CHA2370 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Roaring Twenties | 160-207 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Rob MacIntyre, Adventurous Brewmaster | 1 | Tuesday Terribles | 6 | Oct 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Robinson Gruesome | 33-45 | Monophobia | 1001 | 2010 | Unbound Publishing | Call of Cthulhu (Classic) | Oceania |
| The Rockdale Dead | | The Rockdale Dead | | May 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Role of Prohibition | 5 | King of Chicago | CHA2348 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Roleplaying | 5-34 | Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Roleplaying Ponies Out of Time | 7 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Roleplaying, Hoaxes and You | 18-22 | White Wolf | 48 | Oct 1994 | White Wolf Games | Call of Cthulhu (Classic) | |
| The Roman Legions | 145-147 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Roman Siege Weapons | 89-90 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Rookery | | The Rookery | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Room with No Doors | | The Room with No Doors | | Dec 2020 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1928 |
| The Rosewood Box | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Rosicrucians | 12-15 | Different Worlds | 38 | Jan 1985 | Chaosium | Call of Cthulhu (Classic) | |
| RPG Cultural Appropriation | 42-45 | RPG Review | 17 | Sep 2012 | Self Published | Call of Cthulhu (Classic) | |
| Rryonn | 2-6 | Rryonn | | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Rug | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Rules and Skills | 48-67 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Rules and Skills | 51-74 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Rules for Playing Scout-Investigators | 36-51 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| The Rules Margin | 5 | The Killing Fields | 9 | 2021 | RPG Brisbane | Call of Cthulhu (Classic) | |
| Rulesbook Additions | 137-145 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Rumors | 44-45 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Call of Cthulhu (Classic), Trail of Cthulhu | |
| Run for it! | 62-63 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Running a Parapsychological Campaign | 61-68 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Running a Poltergeist Scenario | 76-82 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Running Delta Green | 312-316 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Running Games for Ponies | 14-15 | Ponies Out of Time | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Running Man | 75-80 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Running Pulp Games | 90-98 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Running the Game | 69-82 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Rusalka | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Russian Civil War | 6-7 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The S S Horizon | 26-41 | Forgotten Symphony | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | At Sea |
| S. Petersen's Field Guide to Cthulhu Monsters | 6-63 | S. Petersen's Field Guide to Cthulhu Monsters | CHA5105 | 1988 | Chaosium | Call of Cthulhu (Classic) | |
| Sack of Uncertainty | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Sacred Cod | 31 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Sacred Ewe of the Black Goat | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Sacred Flame of Bubastis | 117-125 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| Safely Behind Bars | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Saffron Book | 5 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Saga of Abdul Alhazred | 383-415 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Sage Advice | | Chaosium Digest | v18n07 | Feb 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Sage Advice | 43-44 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Sage Advice | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sages | B:12-13 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Sages | 106-107 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Sages for the Game | B:89 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Saint's Peak | | Saint's Peak | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | Spain; 1926; Azathoth |
| The Saltwater Inheritance | | The Saltwater Inheritance | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | England; 1925 |
| Salvation at the Devil's Courthouse | | Salvation at the Devil's Courthouse | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | North Carolina; July; 1920 |
| Samantha Heidrichs | 77-83 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Germany; 1991 |
| Sample Adventure: The Dark Heist | 38-48 | Dark Mirror | CHA0338 | 2007 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Sample Fire-Arms and Explosives | | Keeper's Kit | CHA5110 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Sample Forms and Documents | 145-150 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Sample Gear and Prices | 216-221 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Sample Mythos and Supernatural Entities | 84-91 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | |
| Sample Scenario | 64-79 | Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Sanatorium | 70-88 | Mansions of Madness | CHA2327 | 1990 | Chaosium | Call of Cthulhu (Classic) | New England |
| The Sanatorium | 72-89 | Mansions of Madness | CHA23110 | 2007 | Chaosium | Call of Cthulhu (Classic) | New England |
| Sands of Time | 30-36 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1929 |
| The Sands of Time | 77-84 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1929 |
| Sands of Time | 50-56 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1929 |
| Sandy Petersen's Rules of Game Design | | Ye Booke of Tentacles | 4 | 2003 | The Chaos Society | Call of Cthulhu (Classic) | |
| Sanitarium Forms | | Sanitarium Forms | CHA23135-Sanitarium | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | A:26-31 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | 28-36 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | 154-169 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | B:23-27 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | B:16-17 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | 75-76 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | 46-57 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Sanity | 154-169 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | 30-36 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity | B:16-17 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity and Insanity | 68-79 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity and Insanity | 75-87 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity and Insanity | 46-52 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity and More Sanity | | Chaosium Digest | v02n06 | May 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity and Spells | | Chaosium Digest | v02n05 | May 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Sanity Diary | | The Sanity Diary | | Nov 2025 | Hermit King Studios | Call of Cthulhu (Classic) | |
| Sanity Flowchart | 1 | Sanity Flowchart | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity Loss - Administrative | 151-154 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Sanity Point Costs | 116-117 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Sanity Rules | | Chaosium Digest | v01n09 | Mar 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity Tracker | | Sanity Tracker | | May 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Sanity, Insanity and Roleplaying the Investigator | 20-32 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Santa Claus | Dec 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Sap Keeps Running, Part 1 | 39-42 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| The Sap Keeps Running, Part 2 | 43-46 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| The Sap Keeps Running, Part 3 | 70-72 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| The Sap Keeps Running, Part 4 | 108-124 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| Saturnince Calice | | Cthulhu Maps - Dead Light and Other Dark Turns | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Saturnine Chalice | 31-59 | Dead Light and Other Dark Turns | CHA23159 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Savage Lands | 170-193 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | Kenya; Formless Spawn of Tsathoggua |
| Save the Whales! | 89-91 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| Sawbucks | 6 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Sawbucks | 90 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| The Scales of Time | | The Scales of Time | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | Tennessee |
| Scarabs of Sekhmet | | Terror of Octobernomicon | GGP2201 | 2022 | Golden Goblin Press | Call of Cthulhu (Classic) | Egypt |
| The Scarecrow | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | New Hampshire; 1990s |
| The Scarecrow | | The Scarecrow | | May 2018 | Chaosium | Call of Cthulhu (Classic) | New Hampshire; 1990s |
| Scarlet Fever | 6 | The Unspeakable Oath | 5 | May 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Scarlet Fever | 8 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Scarlet Fever | 1992 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Scenario Background | 10-16 | Sun Spots | 4 | 2017 | Weird 8 | Call of Cthulhu (Classic) | |
| Scenario Hooks | 93-99 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Scenario Upgrade Pack: In the Shadows | | Scenario Upgrade Pack: In the Shadows | cr1001 | 2015 | Cthulhu Reborn | Call of Cthulhu (Classic) | |
| Scene Four - Return to the Marshes | 35-44 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | New York; 1923; December |
| Scene One - Hotel Algonquin | 11-18 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | New York; December; 1923 |
| Scene Three - Hedges Cottage | 27-34 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | New York; December; 1923 |
| Scene Two - The Pennywell Barracks | 19-26 | The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) | New York; 1923; December |
| The Schoolmarm's Ghost | 7-33 | The Schoolmarm's Ghost | | Apr 2024 | Chaosium | Call of Cthulhu (Classic) | Oregon; 1877 |
| Schreckfilm | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | Germany |
| Schrodinger+Adult+8=42 | | Schrodinger+Adult+8=42 | | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Scion of the Black Lotus | | Scion of the Black Lotus | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scope of Magic | 8-12 | White Wolf | 29 | Oct 1992 | White Wolf Games | Call of Cthulhu (Classic) | |
| Scotland | | www.skinner.demon.co.uk/aidan/common/ | | | Self Published | Call of Cthulhu (Classic) | |
| Scream in the Dark: Vampires | 509-510 | Stardate | v3n6 | Jan 1987 | Reluctant Publishing | Call of Cthulhu (Classic) | |
| The Scream of the Mandrake | | The Scream of the Mandrake | | Jun 2021 | Type40 | Call of Cthulhu (Classic) | England |
| The Scribe Vampires of the Monkey Head Nebula (NGC 2174) | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 1 | | Scripta Mala Volume 1 | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 10 | | Scripta Mala Volume 10 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 2 | | Scripta Mala Volume 2 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 3 | | Scripta Mala Volume 3 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 4 | | Scripta Mala Volume 4 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 5 | | Scripta Mala Volume 5 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 6 | | Scripta Mala Volume 6 | | Apr 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 6 | | Scripta Mala Volume 7 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 8 | | Scripta Mala Volume 8 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Scripta Mala Volume 9 | | Scripta Mala Volume 9 | | May 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Scroll of Morloc | 43-52 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Sea Chest | | The Sea Chest | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Sea Circle | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Sea Claims Us All | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| Sea Travel | 43 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| The Séance | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Search for the Forbidden Door | 4-24 | The Search for the Forbidden Door | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Hawaii; 1926; Autumn |
| The Search/What Now? | 4:24 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Searching for Cthulhu in Nightmare House | 35 | Space Gamer | 71 | Nov 1984 | Steve Jackson Games | Call of Cthulhu (Classic), Nightmare House | |
| The Second Circle | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Second Circle | 16-17 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Second Circle | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Second Circle | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Second Death | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Second Voodoo War | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Second Wave | | Chaosium Digest | v22n06 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Second Wave | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Secret Bunker | | Cthulhu Maps - A Secret Bunker | 036 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Secret Cults | 102-120 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Cults | 35-52 | Keeper's Compendium | CHA2344 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Secret Doctrine | 24-27 | Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) | |
| The Secret Glory | | The Secret Glory | | 2021 | Self Published | Call of Cthulhu (Classic) | |
| Secret Histories | 39-138 | Cthulhu Live: Lost Souls | 0005 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| The Secret in the Parchment | 65-71 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| A Secret Lab | | Cthulhu Maps - A Secret Lab | 046 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Secret Motivations in Call of Cthulhu, Or, Why Curiosity Killed the Cat | | Chaosium Digest | v27n08 | Feb 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Secret Name | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Secret of Black Rock | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Arkham; August; 1922; Mi-Go |
| The Secret of Castronegro | 128-141 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | New Mexico; October |
| The Secret of Castronegro | 46-59 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | New Mexico; October |
| The Secret of Castronegro | 166-179 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | New Mexico; October |
| The Secret of Knossos | 6-29 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | Crete |
| The Secret of Marseilles | 31-57 | King of Chicago | CHA2348 | 1994 | Chaosium | Call of Cthulhu (Classic) | France; Chicago; Deep One |
| The Secret of Rolthin Abbey | 23-53 | Strange Tales of Dread & Wonder #1 | CHA0329 | 2006 | Chaosium | Call of Cthulhu (Classic) | Serpentman |
| The Secret of Sebek | 110-124 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Secret of the Golighter Circle | 161-177 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Ireland |
| The Secret of the Tomb | 2-8 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Santa | 6-33 | Secret Santa | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | England; 1919; December |
| Secret Santa | | Albion's Ruin Vol 1 | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | England; December; 1919 |
| Secret Societies | 108-120 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Societies | 54-58 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Societies | 42-43 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Societies | 53-54 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Secret Societies for CoC | | Chaosium Digest | v12n10 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Secrets of Dunwich | 22-27 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Secrets of Dunwich | 37-63 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Secrets of the Kremlin | 38-61 | Glozel Est Authentique! | T-5 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Russia; February; 1931; Dark Young of Shub-Niggurath |
| Secrets of the Kurlies | 85-97 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Japan; 1929 |
| The Secrets of the Watchers | | Valkyrie | 14 | 1996 | Partizan Press | Call of Cthulhu (Classic) | England |
| Secrets Out of Time | 78-95 | Virtual Lore | 2 | 1993 | The Cabil | Call of Cthulhu (Classic) | Mexico |
| Secrets, Mysteries, Legends, and Rumors | 123-125 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| The Seer | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Seizing the Tablets | 181-192 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | Turkey; 1931 |
| Selections from the Livre d'Ivon | 156-158 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Selections from the Livre d'Ivon | 141-143 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Self-Actualizing Man | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| The Semelparites | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Send in the Marines! | 388-406 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Send in the Marines! | 502-521 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Senior Project | 98-136 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1933; Dimensional Shambler |
| Sense No. 6 | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic) | |
| Sensitive Cases Division | 3-7 | Sensitive Cases Division | | Aug 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Sensitivity | 31-32 | Keeper Tips | CHA5120 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Sentence Served | Nov 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sepulchral Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sepulchral Shoggoths | | Sepulchral Shoggoths | | Aug 2021 | Last Mile Game Logistics | Call of Cthulhu (Classic) | |
| The Seraphim Club | | The Seraphim Club | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Serendipity | 6-7 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Serene and Primal | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Great Race of Yith |
| Serpent Kin | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Serpopards | Jan 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Serva Me | | Legends of New Orleans | 10010 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Servant of God | 91-110 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Cuba |
| Servants of the Lake | 56-75 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | Kingsport; 1920s; Glaaki |
| Servants of the Lake | | Cthulhu Maps - Servants of the Lake | | Jun 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Servitors of the Spider-God, Atlach-Nacha | Nov 2002 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Setting | 1-20 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Setting the Stage | 121-133 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Setting the Stage | 95-105 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Settings | 244-259 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Settler's Wall | 16-36 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Settler's Wall | 25-53 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Seven Cryptical Books of Hsan | 429-435 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Seven Cryptical Books of Hsan | 556-562 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Seven Geases | 9-33 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Seven Woodcut Blocks | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | United Kingdom |
| The Seventh Gateway of the Mirage | 16 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Seventh Gateway of the Mirage | | Unknown | | | Self Published | Call of Cthulhu (Classic) | |
| Shaawanoki | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Shabby Hotel | | Cthulhu Maps - A Shabby Hotel | 103 | Aug 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Shade of Yog-Sothoth | | Shade of Yog-Sothoth | | Nov 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Shades of Golgotha | | Ruins of Golgotha | | 2006 | ADP Systems | Call of Cthulhu (Classic) | Dreamlands |
| Shades of Tomorrow Lost | 6-29 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Kingsport; Vulthoom |
| The Shadow from the Steeple | 198-216 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Shadow in the Tree | | Cthulhu Hardboiled Campaign | | | Self Published | Call of Cthulhu (Classic) | Los Angeles; January; 1928 |
| The Shadow in the Tree | | The Shadow in the Tree | | 2003 | Self Published | Call of Cthulhu (Classic) | Los Angeles; January; 1928 |
| Shadow of the Past | 45-74 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Shadow of the Sleeping God | 85-100 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Shadow on the Sea | M1-M8 | Different Worlds | 47 | Aut 1987 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1920s; Deep One; Dagon |
| Shadow on the Sea | | Shadow on the Sea | | Nov 2020 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| The Shadow Over Darkbank | 65-74 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | England |
| The Shadow Over Holywood | 160-168 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; July; 1928; Deep One |
| The Shadow Over Innsmouth | 15-23 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Shadow Over Innsmouth | 15-20 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Shadow Over Innsmouth | 34-87 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Shadow Over Providence | | The Shadow Over Providence | CHA23163 | 2019 | Chaosium | Call of Cthulhu (Classic) | Providence; August; 1928 |
| The Shadow Over Providence | | The Shadow Over Providence | CHA23183 | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Providence; August; 1928 |
| The Shadow Over Sidmouth | 19-22 | Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| Shadow Over Westhaven | 132-163 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| The Shadow People | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shadow Shades | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shadowbox | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shadows by the Fireside | 14-17 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| The Shadows of Frog's Yoghurt | 4-8 | The Black Sun | 1.7 | Spr 1985 | Games Workshop | Call of Cthulhu (Classic) | Fantasy World |
| Shadows of Leningrad | 2-35 | Age of Cthulhu Vol. III: Shadows of Leningrad | 7003 | 2010 | Goodman Games | Call of Cthulhu (Classic) | Russia; Winter; 1927 |
| Shadows of Polynesia | 5-8 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Shadows of the Old Subway | 1-23 | Shadows of the Old Subway | | Dec 2023 | Self Published | Call of Cthulhu (Classic), GURPS (Horror) | New York; 1918 |
| Shadows of War Past | 86-101 | Halloween Horror Returns! | CHA0347 | 2007 | Chaosium | Call of Cthulhu (Classic) | Tennessee; Halloween |
| Shadows of Yesterday, Part 1 | | Chaosium Digest | v27n02 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) | France |
| Shadows of Yesterday, Part 2 | | Chaosium Digest | v27n03 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) | France |
| Shadows of Yesterday, Part 3 | | Chaosium Digest | v27n04 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) | France |
| Shadows Over Holywood | B:91-92 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Shadrack and Pettifogg: Solicitors and Estate Agents | 28-29 | The Whisperer | 1 | Sum 1999 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Shaggai | 205-210 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Shall Humanity Survive? | 201 | Ramblings of a Twisted Muse | CHA0314 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Shallow Roadside Grave | 40 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | Illinois |
| Shamanism | 42-52 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Shambler Between Worlds | | The Shambler Between Worlds | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Shambler from the Stars | 15-23 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Shanghai | 171-207 | The Complete Masks of Nyarlathotep | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) | China; 1925 |
| Shanghai | 189-230 | Masks of Nyarlathotep | CHA23118 | 2010 | Chaosium | Call of Cthulhu (Classic) | China; 1925 |
| Shanghai | E:1-31 | Masks of Nyarlathotep | CHA2307-X | 1984 | Chaosium | Call of Cthulhu (Classic) | China; 1925 |
| Shanghai | 107-137 | Masks of Nyarlathotep | CHA3304 | 1989 | Chaosium | Call of Cthulhu (Classic) | China; 1925 |
| Shannon's Photo | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shantak and Y'golonac | 1-3 | Shantak and Y'golonac | | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Shape Shifting Horrors | 1 | Shape Shifting Horrors | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Boston |
| Sharer of Pain | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sharing Nightmares | 7-13 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| The Shattered Hole | 59-61 | Protodimension | 22 | Win 2015 | Kinstaff Media | Call of Cthulhu (Classic) | Flying Polyp |
| She Walks by Night | | Serendipity's Circle | 13 | Win 1997 | Self Published | Call of Cthulhu (Classic) | London |
| Shenandoah | 1-42 | Shenandoah | CHA0377 | 2009 | Chaosium | Call of Cthulhu (Classic) | Missouri; 1927 |
| Shepherd of Moths | 5-18 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Shepherd of Moths | 1-4 | Shepherd of Moths | | Mar 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Shepherd/Shepherdess of the Black Goat | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shifting Spells | 22-23 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Shock in the Lightest Night | 114-123 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; November; 1933 |
| Shoggites | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shoggoth Local #1 | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shoggoth o' War | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shoggoth Seeds | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Shoggoths Don't Kill People, Guns Do | 28-29 | Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic) | |
| Shopping in London | A:70-80 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Short Story | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Short Story | 16 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Short Story | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Short Tour Around Mare Nostrum | 20-60 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Shotguns | 76-85 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Shouyokai | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Show Must Go On | 3-9 | The Show Must Go On | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | The Netherlands; 1930s |
| The Shrieking Shack | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| A Shrieking Violet | | A Shrieking Violet | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1920 |
| A Shrine Under the Sea | | Cthulhu Maps - A Shrine Under the Sea | 013 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Shurgas Mine | 1-15 | Shurgas Mine | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Colorado; 1924 |
| Sick Building Syndrome | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Sight Unseen | | Sight Unseen | SKP0833 | 2008 | Skirmisher Publishing | Call of Cthulhu (Classic) | Arkham |
| The Sights of the City | 21-57 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Silent Hill Area and History | 7-24 | Silent Hill | | 2009 | Tribal Morgue Studios | Call of Cthulhu (Classic) | |
| Silent Hill Characters | 35-56 | Silent Hill | | 2009 | Tribal Morgue Studios | Call of Cthulhu (Classic) | |
| The Silh | | The Silh | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Silks of Irem | 31-35 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Silvio Fragments | 5-6 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Simplon-Orient Express Operations | A:4-14 | Horror on the Orient Express | CHA2331-X | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Simplon-Orient Express Operations | A:19-32 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Simply Red | 112-121 | Blood Brothers 2 | CHA2340 | 1992 | Chaosium | Call of Cthulhu (Classic) | Summer; 1980s; Psycopath |
| Sine Qua Nona | | Serendipity's Circle | 16 | | Self Published | Call of Cthulhu (Classic) | |
| Sing Sing | | Sing Sing | | 2006 | Self Published | Call of Cthulhu (Classic) | New York State; 1921 |
| The Singer from Dhol | 35-62 | Worlds of Cthulhu | 2 | Feb 2005 | Pegasus Press | Call of Cthulhu (Classic) | Maine; 1920 |
| Sinister Seeds | 153-157 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Sinister Seeds | 159-164 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Sinister Seeds | 124-126 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| The Sinne Eater | Feb 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Siren Weed | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Siren's Bane | 60-66 | Forgotten Symphony | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Sirens of Dagon | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sister of the Sands | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Sister Rosetta | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sisters of Doom | | Sisters of Doom | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Sisters of Sorrow | 4-14 | Sisters Of Sorrow | PELGT29 | 2012 | Pelgrane Press | Call of Cthulhu (Classic) | Atlantic Ocean |
| Sites of Antiquity | 29-30 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Sites of Antiquity | 45-46 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Sites of Antiquity | 47-48 | Bayt al Azif | 2 | Sep 2019 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Situations Vacant | 43-46 | White Dwarf | 94 | Oct 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| Six Foot plot | 8-11 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Six Impossible Things Before Breakfast | 5-88 | Through a Glass Darkly | | 2011 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Sixteen Tons | | Serendipity's Circle | 20 | | Self Published | Call of Cthulhu (Classic) | |
| Skeeter Man | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Skeletal Jester: Avatar of Nyarlathotep | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Skill Checks in Pulp Cthulhu | Dec 2023 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Skills | 73-77 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Skills | 54-79 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Skills | B:12-21 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Skills | 94-121 | Investigator's Handbook | CHA23136 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Skills | 16-37 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| Skills | 54-79 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Skills for the 1920s | 48-55 | 1920s Investigator's Companion Vol. II | CHA2346 | 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Skills Revisited | 177-203 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Slang | 47-51 | The Book of Random Tables 1920s - 1930s | | 2020 | dicegeeks | Trail of Cthulhu, Call of Cthulhu (Classic) | |
| The Sleep of Death, What Dreams May Come | | Valkyrie | 13 | 1996 | Partizan Press | Call of Cthulhu (Classic) | United Kingdom; 1920s |
| Sleep Perchance to Dream? | | Dagon | 13 | Jun 1986 | Self Published | Call of Cthulhu (Classic) | |
| Sleepwriting | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Sleeve Gun | Jun 2022 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Sleigh Ride | 105-126 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | Russia; Winter; 1926 |
| The Sleipnir Club | 49-57 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| A Slip in Time? | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Slither in the Dark | 96, 99, 100 | Dragon | 222 | Oct 1995 | TSR | Call of Cthulhu (Classic) | |
| Slither Rats | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Slow Boat | 65-78 | Fearful Passages | CHA2335 | 1992 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Slow Boat to China | 205-234 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | Pacific Ocean; 1931; Zombie; Hunting Horror |
| Slug Horrors | Feb 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Slugs and Snails | 54-67 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | England |
| Slump-Fast | Sep 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Small Things Forgotten | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Smedley House | 53-54 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Smiling Jack and Mr Smith | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Smiling Jack and Mr Smith | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Smoke Green | | Smoke Green | cr6202 | 2019 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham; 1928; October |
| Smoke on the Huangpu | | Smoke on the Huangpu | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | China; 1931 |
| A Smuggler's Cave | | Cthulhu Maps - A Smuggler's Cave | 085 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Smuggler's Cove | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Germany |
| Smuggler's Cove | 25-26 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Germany |
| Smuggler's Cove | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Germany |
| Smuggler's Run | 28-38 | Adventures Unlimited | 2 | Sum 1995 | Bootstrap Press | Call of Cthulhu (Classic) | 1930s |
| The Smugglers' Tunnels | 121-130 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Smugglers' Tunnels | 122-131 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Smurl Poltergeist | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Snails | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Snake in Blood | | Chaosium Digest | v26n06 | Aug 1998 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1920s; Nyarlathotep |
| Snake Island | 206-221 | The Two-Headed Serpent | CHA23125 | 2017 | Chaosium | Call of Cthulhu (Classic) | Brazil; 1930s; Serpentman |
| Snake Oil Salesman | 4-21 | Snake Oil Salesman | | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | Florida; November; 1929 |
| Snakes | 103-107 | Ye Booke of Tentacles | 1 | 1998 | The Chaos Society | Call of Cthulhu (Classic) | |
| Snakes Alive II: The Statistics | 52 | Games Master International | 14 | Sep 1991 | Newsfield | Call of Cthulhu (Classic) | |
| Snakes Alive! | 52-54 | Games Master International | 12 | Jul 1991 | Newsfield | Call of Cthulhu (Classic) | |
| The Snout in the Alcove | 224-232 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Snow-Thing | 68-79 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Snowmageddon! | Jan 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Maine |
| Snuff | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Social Life | 15 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Social Life | 52-63 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Societies | 87-96 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Societies, Cults, and Mysteries | 102-111 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Society Della Santa Fe | | Chaosium Digest | v12n11 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Sol Noctis | | Sol Noctis | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | New Hampshire; 1938 |
| The Solo Investigators Handbook | | The Solo Investigators Handbook | | Feb 2019 | 5E Solo Gamebooks | Call of Cthulhu (Classic) | |
| Some Notes on the Biology of the Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Some Notes on the Eltdown Shards | 3-4 | Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic) | |
| Some Wounds Never Heal | | Valkyrie | 12 | 1996 | Partizan Press | Call of Cthulhu (Classic) | United Kingdom; 1920s |
| Something is Rotten in the Root Cellar | | The Blasphemous Tome | 3 | Dec 2017 | Self Published | Call of Cthulhu (Classic) | |
| Something's Hiding in the Fourgon | 2:36 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Son of the Void | 4-23 | The Son of the Void | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Deep Space; 2804 |
| Song and Dance | 109-130 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| A Song for the Devil | 1 | A Letter From Yuggoth | 1 | Mar 2016 | Yaqqothl Press | Call of Cthulhu (Classic) | Boston; 1920s |
| Song of Harlem | 11-18 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | |
| Song of Harlem | 9-24 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Song of the Lost and Forgotten | 97-152 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | India; China; 1920s |
| Song of the Spheres | 40-52 | In the Shadows | CHA2357 | 1995 | Chaosium | Call of Cthulhu (Classic) | Connecticut |
| The Songs of Fantari | 43-60 | Fatal Experiments | CHA2328 | 1990 | Chaosium | Call of Cthulhu (Classic) | Italy; Deep One |
| Soothsayer | 1-2 | Soothsayer | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Soratorius Albion: New Spells | 92-94 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Sorcerer's Jewel | 154-168 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| The Sorrow of Search | 3-8 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Sorrow's Glen | 57-75 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | New England; Lloigor; Ghatanothoa; Ghast |
| Soul Taker | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Souls of Harlem | 233-257 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Souls of Harlem | 41-72 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Sound of the Sea | | Sound of the Sea | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | North Sea; 1927; March |
| Sourcebook | 1-61 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Sourcebook Additions | 130-137 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| A Southern Villa | | Cthulhu Maps - A Southern Villa | 114 | Aug 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Space Between Time | 73-100 | A Time for Sacrifice | NCG-TFS-HC-01 | 2020 | New Comet Games | Call of Cthulhu (Classic) | Cuba; Mexico; 1930 |
| The Space-Eaters | 76-79 | Challenge | 46 | Oct 1990 | Games Designers Workshop | Call of Cthulhu (Classic) | |
| Spaceman | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Spare Some Change? | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Spare Some Change? | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Spare the Rod | 82-99 | More Adventures in Arkham Country | MRP0007 | 2010 | Miskatonic River Press | Call of Cthulhu (Classic) | Arkham |
| The Spark Devil | | The Spark Devil | | 2025 | The H P Lovecraft Historical Society | Call of Cthulhu (Classic) | Providence; 1935 |
| Spark of Life | | Spark of Life | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | Arkham; September; 1926 |
| The Spawn | 8-39 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | New Mexico; 1920; Yig |
| The Spawn of Azathoth | B:53-61 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Tibet; 1927; Azathoth |
| The Spawn of Hali | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Spawn of the Deep | 103-111 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | 1980s; Non-Mythos |
| Spawn of the North | 145-160 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Speaking with the Spirits | 36-40 | Dragon | 139 | Nov 1988 | TSR | Call of Cthulhu (Classic) | |
| Special Occasions | 60 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Special Shotguns | 1-10 | Special Shotguns | | 2012 | Drakat Games | Call of Cthulhu (Classic) | |
| The Specimen | 29 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Specimen | | Unknown | | | Self Published | Call of Cthulhu (Classic) | |
| Spectre of the Witch | 112 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England |
| Spell Categories | 22-25 | The Grand Grimoire of Cthulhu Mythos Magic | CHA23141 | 2017 | Chaosium | Call of Cthulhu (Classic) | |
| Spells | 55-64 | First Book of Things | CHA0307 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Spells for Starting Characters | | Chaosium Digest | v01n06 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Spells of N'tse-Kaambl | | Chaosium Digest | v17n02 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Spells of the Cult of Shub-Niggurath | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Spells of the Yig Cult (Part 1) | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Spells, Feats, and Skills | 225-231 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Spells: A Grimoire | 166-176 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Sphere | | Chaosium Digest | v22n11 | Dec 1997 | Chaosium | Call of Cthulhu (Classic) | New Orleans; March; 1974 |
| The Sphinx of Abormis | 81-87 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Sphinx Tomb | 90-101 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | Egypt; October; 1925 |
| The Spider Man | 8-9 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Spider Man | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Spider Man | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| The Spider-Man | 6 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Spirit of a Thief | 16-28 | Opifex Bimonthly | 2 | 1996 | Self Published | Call of Cthulhu (Classic) | Maine; 1990s |
| Spirit of a Thief | 537-553 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Maine; 1990s |
| Spirit of Industry | 47-61 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Dunwich |
| Spirit of Industry | 53-72 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Dunwich |
| Spirit of the Mountain | 43-47, 50-54 | White Dwarf | 99 | Mar 1988 | Games Workshop | Call of Cthulhu (Classic) | Mountain; 1920s |
| Spirits of the Earth | 269-302 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | India; 1920s |
| Spirits Over Arkham | | Spirits Over Arkham | | 1987 | Self Published | Call of Cthulhu (Classic) | Arkham; 1920; September |
| Spiritualism and Mediumship | 41-47 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Spoiled Milk | | Spoiled Milk | cr6203 | 2019 | Cthulhu Reborn | Call of Cthulhu (Classic) | Arkham; October; 1928 |
| Spore Bearers | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sport | 70 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Sport | 35-37 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Sports | 23-26 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Spouters | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Springer Mound and the Canal | 56-67 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | England; November; 1928 |
| SS Gabrielle | 68-74 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| St Augustine | B:14-27 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Florida; May; 1927 |
| St Augustine, Florida | 69-93 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Florida; May; 1927 |
| St Dymphna's Orphanage: Azathoth's Children | | St Dymphna's Orphanage: Azathoth's Children | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1920s |
| St Midabaria Clinic | 1-2 | St Midabaria Clinic | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | |
| St Mormo's Home for Wayward Girls | | St Mormo's Home for Wayward Girls | | Jul 2022 | Chaosium | Call of Cthulhu (Classic) | New York State; 1920s |
| St Raphael's | | St Raphael's | | 2002 | Self Published | Call of Cthulhu (Classic) | |
| St Swithun's Hole | 94-106 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1920s; Ghoul |
| Stage Fright at the Playhouse | 1-20 | Stage Fright at the Playhouse | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1923; Autumn |
| Stage Managing Live Action Play | 1999 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stagecraft | 173-205 | Cthulhu Live | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Stained Glass Props | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stained Glasses | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stained Windows | 252-276 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| The Staircase | | The Staircase | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Stairs in the Crypt | 130-140 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Stalker of the Wild Wind | 219-232 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Stanzas of Dzjn | 139-154 | The Book of Dzyan | CHA6027 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| The Star Brothers | 5-25 | The Star Brothers | | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| The Star Brothers | | Flotsam and Jetsam: Introduction and the Star Brothers | | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| The Star on the Shore | 5-73 | The Star on the Shore | DCG-SS-HC-1 | 2017 | Dark Cult Games | Call of Cthulhu (Classic) | New England; 1920s |
| Star Ridge Manor | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Star Seed | 271-285 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland; Colour Out of Space |
| Starchild from Afar | | Starchild from Afar | | Feb 2024 | Chaosium | Call of Cthulhu (Classic) | Sweden; May; 1924 |
| Stare of the Monster | Feb 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Starers | Dec 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Starfall | | Starfall | | Jun 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Starfall Over the Plateau of Leng | 2-49 | Age of Cthulhu Vol. VIII: Starfall Over the Plateau of Leng | 7008 | 2014 | Goodman Games | Call of Cthulhu (Classic) | Arkansas; Arkham; Dreamlands; November; 1927 |
| Starkmoor Hall | 35-? | Arcane Encounters | 4 | Apr 1997 | Future Publishing | Call of Cthulhu (Classic), Feng Shui, Vampyre the Masquerade | |
| The Starry Wisdom Cult | 116-121 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Classic) | |
| The Stars are Right | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Arkham |
| Stars Over Siberia | 5-36 | Stars Over Siberia | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Russia; 1929 |
| The Starshrine | 78-103 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | |
| Starting Out: Call of Cthulhu | | Never Mind the Dice Rolls | 45 | May 2025 | NmtDRzine | Call of Cthulhu (Classic) | |
| Starting Your Call of Cthulhu Campaign | 30-37 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Starving Ones | 13-28 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) | West Virginia; 1935 |
| Station S | 3-11 | Station S | FXC-16 | 2021 | Stygian Fox | Call of Cthulhu (Classic) | Scotland; 1940s |
| Statue of the Sorcerer | A:5-32 | Statue of the Sorcerer, The Vanishing Conjurer | CHA2318 | 1986 | Chaosium | Call of Cthulhu (Classic) | San Francisco; June; 1925 |
| Stay | | Serendipity's Circle | 12 | | Self Published | Call of Cthulhu (Classic) | |
| Stay out of the Forest on Thurdays | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Steamboat in the Fog | | Cthulhu Maps - A Steamboat in the Fog | 125 | Jun 2025 | Lovemaps | Call of Cthulhu (Classic) | |
| Sticks and Twigs Like Men | 1-25 | Sticks and Twigs Like Men | | 2005 | Self Published | Call of Cthulhu (Classic) | England; 1970s |
| A Sticky Situation | | A Sticky Situation | | 2019 | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Still Waters | 40-55 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | Mississippi; Lesser Race |
| Stolen Grief | 3-20 | Stolen Grief | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | England |
| Stone Shifter | 44-47 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Stone's Throw From Atlantis | | A Stone's Throw From Atlantis | | Apr 2021 | Type40 | Call of Cthulhu (Classic) | Spain; 1924 |
| Stones of Doom | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stones of Doom (2) | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stop, Thief! | Oct 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Stories | 228-243 | Call of Cthulhu d20 | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) | |
| The Stories | 95-102 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Storm From a Teacup | | Storm From a Teacup | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | |
| A Stormy Detour | | A Stormy Detour | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | Montana |
| A Story Idea for the Black Stone | | Chaosium Digest | v03n06 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | Deep One; Serpentman |
| The Story of the Scorched Sigil | 109-116 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| The Story of the Scorched Sigil | | The Story of the Scorched Sigil | YH-C-16 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Story Scenes | 42-51 | Pax Cthuliana | | 2017 | Two Starving Gnolls | Call of Cthulhu (Classic) | London; 1927 |
| Storytelling | 75-83 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Call of Cthulhu (Classic), Cthulhu Confidential | |
| Storytelling | 89-104 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Stranded on the North Shore | | Stranded on the North Shore | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Minnesota; March; 1925; Deep One |
| The Strange and Sunken Fate of Karl Heinrich | 1-16 | The Strange and Sunken Fate of Karl Heinrich | | Jul 2019 | Self Published | Call of Cthulhu (Classic), GURPS (Horror) | Atlantic Ocean; June; 1937 |
| Strange Berlin | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Strange Carol | 5-19 | Strange Carol | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1926 |
| The Strange Case of Anthony Hanson | 4-20 | The Strange Case of Anthony Hanson | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 2010; March |
| The Strange Case of Mr Cardew | | The Strange Case of Mr Cardew | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | England |
| The Strange Case of the Brown Mountain Lights | 61-92 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1927; Mi-Go |
| The Strange Case of the Brown Mountain Lights - 1927 | 61-87 | The Phantom of Wilson Creek | | May 2023 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1927; Mi-Go |
| The Strange Case of the Mising Painting | May 2020 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | New York; 1922 |
| Strange Eons | | Chaosium Digest | v04n10 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) | California; Summer |
| Strange Gates, Hidden Demons | 21-62 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | Singapore; 1920s |
| Strange Gates, Hidden Demons | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| The Strange Hight House in the Mist | 9-13 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Strange Little Girl | 76-92 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; 1920s; Dark Young of Shub-Niggurath |
| The Strange Spectacles of Dr Scolius | 28 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Strange Vistas Submission Request | 17-19 | Opifex Bimonthly | 7 | May 1997 | Self Published | Call of Cthulhu (Classic) | |
| The Stranger on the Style | | The Blasphemous Tome | 4 | Dec 2018 | Self Published | Call of Cthulhu (Classic) | |
| The Strangue Bible | 28-29 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Strategic Industries | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Stratigraph | | Stratigraph | CHA23135-Stratigraph | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Stray Cat Strut | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Stray Cat Strut | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Stray Cat Strut | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Street Talk | | Dagon | 7 | May 1985 | Self Published | Call of Cthulhu (Classic) | |
| Stress Disorders | 294-299 | Delta Green: Targets of Opportunity | PAG2108 | 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| String Quartet | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Strolling About | 1:00 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Strong Feed Upon the Weak | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| The Stuff That Heroes Are Made Of | 28-29 | The Whisperer | 4 | Spr 2001 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Stygian Hound | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Submachine Guns | 86-92 | Investigator Weapons Volume 1: The 1920s and 1930s | 60-IHB01 | 2012 | Sixtystone Press | Call of Cthulhu (Classic) | |
| A Submarine in the Depths | | Cthulhu Maps - A Submarine in the Depths | 057 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Subterranean Deep One | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Subterranean London | 54-57 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Suburban Hamlet of West Norwood | 29-53 | Five Go Mad in Egypt | CHA0381 | 2009 | Chaosium | Call of Cthulhu (Classic) | London; 1925; October |
| The Suburbs | 65-106 | Secrets of Los Angeles | CHA23111 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Sudan | 84-114 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Sudan; 1991 |
| The Sudden Storm | | The Sudden Storm | | May 2019 | Chaosium | Call of Cthulhu (Classic) | Maine |
| Suffer Little Children | 14-24 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | New Hampshire; Summer; 1927 |
| Suffer Little Children | 17 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| Suffer not a Wizard to Live | 15-34 | Undying Leaders | CHA0343 | 2007 | Chaosium | Call of Cthulhu (Classic) | Vermont |
| Suffer the Child | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Suffer the Children | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Suffering Artist | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Sugar Rush | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Suggestions for Effectively Running the Campaign and Several Plot Seeds | 5-18 | The Primal State | CHA0344 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Suggestions for Keepers | 12-22 | The Keeper's Companion Vol 1 | CHA2388 | 2000 | Chaosium | Call of Cthulhu (Classic) | |
| The Suicide in the Study | 9-14 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Suitable for Framing | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Suited and Booted | 46-56 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | London; 1920s |
| Suited and Booted | 128-138 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | London; 1920s |
| The Sultan's Treasure | 28-35 | Adventures Unlimited | 5 | Spr 1996 | Bootstrap Press | Call of Cthulhu (Classic) | 1920s; Deep One |
| Summer at Soundsend | 11-19 | Abyss | 24 | May 1983 | Ragnarok Games | Call of Cthulhu (Classic) | Summer |
| Summon Web Scryer | 44-? | Knights of the Dinner Table | 42 | Apr 2000 | Kenzer and Company | Call of Cthulhu (Classic) | |
| Summon Web Scryer | 74-? | Knights of the Dinner Table | 85 | Nov 2003 | Kenzer and Company | Call of Cthulhu (Classic) | |
| Sun and Shadow | | Terror of Octobernomicon | GGP2201 | 2022 | Golden Goblin Press | Call of Cthulhu (Classic) | Australia |
| Sun Spots Game Master's Kit | | Sun Spots Game Master's Kit | W8_005 | 2018 | Weird 8 | Call of Cthulhu (Classic) | |
| The Sun, The Stones and the Vision | 17-30 | Sun Spots | 4 | 2017 | Weird 8 | Call of Cthulhu (Classic) | Boston; February; 1926 |
| The Sundial of Amen-Tet | 37-56 | Lurking Fears | 0001 | Jan 1990 | Triad Entertainments | Call of Cthulhu (Classic) | New York State; September; 1923; Nyarlathotep; Gug; Hound of Tindalos |
| Sunken Dreams | | Sunken Dreams | | Jan 2020 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Superstitions | 43-44 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Superstitions | 59 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Supporting Cast | 101-113 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | |
| The Surrey Enigma | 22-26 | White Dwarf | 69 | Sep 1985 | Games Workshop | Call of Cthulhu (Classic) | England; July; 1923 |
| Survival Horror | 18-19 | The Gazebo | 3 | Nov 2012 | Self Published | Call of Cthulhu (Classic) | |
| Survivors Guilt Manifested | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Suspended Pending Resolution | | Terror of Octobernomicon | GGP2201 | 2022 | Golden Goblin Press | Call of Cthulhu (Classic) | England |
| Susquehanna Sasquatch! | Sep 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Pennsylvania; 1931; June |
| The Sussex Manuscript | 199-233 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Sussex Manuscript | 301-350 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Swamp Bones | 485-514 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Florida; 1990s |
| Swamp Song | | Swamp Song | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1920s |
| The Swarming | 94-103 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Michigan; Autumn; 1981; Werewolf |
| The Swarms of Tanffridd | 3-16 | The Swarms of Tanffridd | | Feb 2025 | Chaosium | Call of Cthulhu (Classic) | Wales; 1920s |
| Sweet Child of Mine | | Chaosium Digest | v29n05 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | |
| A Sweet Time of the Year | | A Sweet Time of the Year | | Mar 2022 | Chaosium | Call of Cthulhu (Classic) | Vermont; Autumn; 1921 |
| Swift River Rising | | Swift River Rising | | May 2025 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1939 |
| The Sword of Akmallah | 268-270 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Sword of Akmallah | 249-251 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Sword of Sneferu | 38-50 | Worlds of Cthulhu | 6 | Jan 2009 | Pegasus Press | Call of Cthulhu (Classic) | |
| The Sword of Sneferu | 29-41 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | |
| Sylah-qaulath | | Sylah-qaulath | | May 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Sylvia | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Symbiotic Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| System Stuff | 57-73 | Harlem Unbound | 1 | 2017 | Darker Hue Studios | Cthulhu Confidential, Call of Cthulhu (Classic) | |
| Szepassony | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Tableau of Red | 7-27 | A Tableau of Red | | Mar 2020 | Noralle | Call of Cthulhu (Classic) | Spain |
| The Tablets of Destiny | 37-41 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Tablets of Ur-Nansha | 59-75 | Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic) | Morocco; 1920s |
| The Tablets of Ur-Nansha | 67-83 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic) | Morocco; 1920s |
| The Taint of Dracula | 31-38 | Role Player Independent | 2 | Jan 1993 | Symbiosis Publishing | Call of Cthulhu (Classic) | England; Paris; 1920s; Vampire |
| Tainted Fruit: A Taint of Shub-Niggurath | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Tainted Rosebush: Tain of Shub-Niggurath | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Take Care What You Seek | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Take the Force of the Blow | 1-18 | Take the Force of the Blow | | 1999 | Self Published | Call of Cthulhu (Classic) | Australia; November; 1924 |
| Taken for Granite | | Taken for Granite | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Vermont; November; 1922 |
| Taken For Granite | 15-41 | Embraced Fate | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1922; November |
| Tale of Priest Kwan | 436-439 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Tale of Priest Kwan | 563-566 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Tale of Satampra Zeiros | 57-71 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| A Tale of the 13th Floor | Dec 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | |
| The Tale of Toad Loop | 177-193 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Tales From the Crypt | | Chaosium Digest | v07n02 | Aug 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Tales of Nephren-Ka | 10-17 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Tales of Nephren-Ka | 12-20 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Tales of the Blair Witch Project | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | |
| Tales of the Casket Girls | | Tales of the Casket Girls | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | New Orleans |
| Talk of Goatswood | 101-106 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | England; December; 1929 |
| Tanner Ranch | | Tanner Ranch | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Targhuz | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Tarot of Madness | | Tarot of Madness | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Tatterdemallion | 17-42 | Fatal Experiments | CHA2328 | 1990 | Chaosium | Call of Cthulhu (Classic) | New York; Hastur |
| Tatterdemallion | | Tatterdemallion | | 1988 | Self Published | Call of Cthulhu (Classic) | New York; Hastur |
| Tatters of the King | 282-299 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Tatters of the King | 284-? | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Tatters of the King Book 1 Maps | | Cthulhu Maps - Tatters of the King - Book 1 | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Tatters of the King Book 2 and 3 Maps | | Cthulhu Maps - Tatters of the King - Book 2 and 3 | | Jan 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Tatters of the King Prologue Maps | | Cthulhu Maps - Tatters of the King - prologue | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| The Tattoo | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Tattoo | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Tatzelwurm | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Tax Season | 103-130 | Laws, Taxes and Regulations | | Apr 2026 | Self Published | Call of Cthulhu (Classic) | |
| Tea and Biscuits | 76-79 | Challenge | 71 | 1993 | Games Designers Workshop | Call of Cthulhu (Classic) | Boston; Ghoul |
| Tears of Tindalos | 73-74 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Technology | 53-55 | First Book of Things | CHA0307 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Technology | 23-25 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Technology and Science of the Twenties and Thirties | 30-38 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Technology, Communications and the News | A:82-85 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Techtych: Blood Test: Porphyria: The Vampire Disease? | 31-32 | Cryptych | 2 | Sep 1993 | ILM International | Call of Cthulhu (Classic) | |
| Teenage Werewolf | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Telegram German Empire | | Telegram German Empire | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Telegrams | | Telegrams | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) | |
| "Tell Me Have You Seen the Yellow Sign?" | 33-56 | Tales of the Crescent City | GGP1401 | 2014 | Golden Goblin Press | Call of Cthulhu (Classic) | New Orleans |
| Tell me, have you seen the Yellow Sign? | 56-74 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) | New Orleans; Hastur |
| Tell Me, O Muse | 4-15 | Tell Me, O Muse | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | 1919; January |
| The Temple Drums | | The Temple Drums | | Jul 2019 | Chaosium | Call of Cthulhu (Classic) | Maine; Autumn; 1936 |
| The Temple of Dagon | | Cthulhu Maps - The Temple of Dagon | 060 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Temple of Nephren-Ka | 206-214 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Temple of the Crawling Chaos | | Temple of the Crawling Chaos | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Egypt; April; 1923 |
| The Temple of the Moon | 18-40 | Terror from the Stars | CHA2313 | 1986 | Chaosium | Call of Cthulhu (Classic) | Peru; New York; September; 1920s; Mi-Go |
| The Temple of the Moon | 86-108 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Peru; New York; September; 1920s; Mi-Go |
| Temple of the Toad | 186-204 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | Honduras; April; 1927 |
| The Temple of the Toad | | Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic) | Greenland; May; 1920; Formless Spawn of Tsathoggua |
| Temporary Insanity | 8-9 | Opifex Bimonthly | 11 | Jan 1998 | Self Published | Call of Cthulhu (Classic) | |
| Temporary Insanity in Combat | | Chaosium Digest | v23n02 | Feb 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Ten Commandments of Cthulhu Hunting | 121-123 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| The Ten Commandments of Directing a LARP | 1996 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ten Destinations for the Vacationing Investigator | | Ten Destinations for the Vacationing Investigator | | Aug 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Ten Evil Toys | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | 1920s; December |
| Ten Evil Toys | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | December; 1920s |
| Tenant Echo | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Tenement | 57-78 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York; Shoggoth |
| The Tenement | 54-57 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic) | |
| Tent-Pole NPCs | 32-37 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Tent-Pole NPCs | 36-42 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Terrible Head | 12-13 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | Nightgaunt |
| The Terrible Old Bookshop | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Terrible Old Bookshop | 32 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| The Terrible Old Bookshop | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Terrible Parchment | 1-6 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Terrible Parchment | 4-11 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Terrible Tomes | | Terrible Tomes | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | |
| The Terrifying House | Nov 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Terror | 5-28 | Terror | CHA0322 | 2005 | Chaosium | Call of Cthulhu (Classic) | Russia; February; 1932 |
| Terror at Erne Rock | 39-54 | Halloween Horror | CHA0326 | 2005 | Chaosium | Call of Cthulhu (Classic) | Canada; Halloween; Gloon |
| Terror at Erne Rock | | Chaosium Digest | v31n11 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) | Canada; Halloween; Gloon |
| Terror at the Top of the World | 27-44 | Age of Cthulhu Vol. V: Long Reach of Evil | 7005 | 2011 | Goodman Games | Call of Cthulhu (Classic) | Tibet; 1920s |
| The Terror From the Museum | 21-38 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York |
| Terror in Cut-Throat Cove | 236-268 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Terror in Tangier | 1-2 | Terror in Tangier | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Morocco; April; 1924 |
| The Terror in the Fog | 37-38 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London; 1926; Spring |
| The Terror in the Fog | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London; Spring; 1926 |
| Terror in the Swamp | 135-145 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; September; 1927; Nightgaunt; Shantak; Sand Dweller |
| Terror Itself | | Terror Itself | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; July; 1927 |
| The Terror of Monks Walk | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Terror of the Old Ones | 26 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Terror on the Deep | 31-33 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Classic) | Atlantic Ocean |
| Terror on the SS Champagne | 17-56 | The Order of the Stone | CHA23160 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Terror on the Thames | C:5-44 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | London; June; 1920 |
| Terror Tactics | 90-94 | Bayt al Azif | 6 | Feb 2026 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Terror Through Time | 4-14 | Terror Through Time | | May 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Test Resolution | 53-62 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Test Resolution | 40-48 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Test Subjects | | Test Subjects | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) | Boston; 1923; Serpentman |
| The Testament of Athammaus | 34-56 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Testament of Fascination and Survival | 41 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| That Damned Auction | 3-6 | That Damned Auction | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | November; 1922 |
| That Horrid Book | 10-11 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic) | |
| That Howling Frontier Part 1 | 46-53 | Protodimension | 14 | Win 2013 | Kinstaff Media | Call of Cthulhu (Classic) | India; 1928 |
| That Howling Frontier Part 2 | 6-14 | Protodimension | 17 | Aut 2013 | Kinstaff Media | Call of Cthulhu (Classic) | India; 1928 |
| That Jazz Craze | 133-152 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| That Old Fashioned Charm | Oct 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| That Person | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| That Which Was Broken | 55-92 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; 1925; Autumn |
| Thaumaturgical Prodigies in the New England Canaan | 13-17 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| (The Facts in) The Case of Mark Edward Morrison | 8-9 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| A Theater of Flesh | 3-15 | A Theater of Flesh | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | Paris; 1920s |
| The Theatre of Death | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| The Theatre of Death | 26-27 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London |
| The Theatre of Death | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Theatre Style Live Roleplaying Events | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Theft of the Thirty-Nine Girdles | 72-84 | The Tsathoggua Cycle | CHA6029 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Then Everything Went Black? | 37 | White Dwarf | 83 | Nov 1986 | Games Workshop | Call of Cthulhu (Classic) | |
| There is a Book | 13-19 | Madness on the Orient Express | CHA6057 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| There is This One Girl | 105-140 | The Sassoon Files | SOS-HORROR1 | 2019 | Sons of the Singularity | Call of Cthulhu (Classic), Cthulhu Confidential | Singapore; 1920s |
| There is this One Girl | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| They Are From Away | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Maine |
| They Are Real | 55-69 | Bayt al Azif | 4 | Jan 2022 | Bayt al Azif Inc | Call of Cthulhu (Classic), Trail of Cthulhu | France; 1931 |
| They Only Come Out At Night | 161-168 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| They Sleep By Twilight | 42-59 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic) | Boston; July; 1926 |
| Thicker Than Blood | 1-25 | Thicker Than Blood | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | Arkansas; 1933 |
| Thieves Like Us | 2000 | Gaming Outpost | | | Self Published | Call of Cthulhu (Classic) | New York; Byakhee |
| Thin Jack | 267-278 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | 1992 |
| The Thing at the Window | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Thing from Another World | 474-522 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Thing From Outside | 40-56 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Thing in Parcel 314 | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Thing in the Darkness | 11-29 | Fantasy Gamer | 3 | Dec 1983 | Steve Jackson Games | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Thing in the Darkness Keeper Notes | 32 | Fantasy Gamer | 4 | Feb 1984 | Steve Jackson Games | Call of Cthulhu (Classic) | Arkham; 1920s |
| The Thing in the Pines | | The Thing in the Pines | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | Michigan; November; 1927 |
| The Thing in the Pit | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Thing in the Pool | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Thing in the Well | 14-18 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | Boston; 1929 |
| The Thing in the Well | 54-59 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic) | Boston; 1929 |
| The Thing in the Well | 34-38 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Boston; 1929 |
| The Thing on the Fourble Board | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Thing That Came from Kynarth! | Oct 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Chicago; 1921; Halloween |
| The Thing That Walked on the Wind | 57-67 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Thing They Brought Back | 1-15 | The Thing They Brought Back | | 2012 | Self Published | Call of Cthulhu (Classic) | Atlantic Ocean; 1912; April |
| The Thing with Two Heads, Experiments into immortality run amuck. | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Things Just Got Stranger | 24-26 | Valkyrie | 2 | Oct 1994 | Partizan Press | Call of Cthulhu (Classic) | |
| Things That Go Bump in the Night | 31-34 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Things We Feed | | The Things We Feed | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | New Orleans; 1926 |
| The Third Order, Part One | | Chaosium Digest | v10n11 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; March; 1920 |
| The Third Order, Part Two | | Chaosium Digest | v10n12 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) | Arkham; March; 1920 |
| The Thirsting Tide | Feb 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Thirteen | 13-16 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Thirteen | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Thirteen | 4-22 | The Thirteen | | 2017 | Stygian Fox | Call of Cthulhu (Classic) | |
| Thirteen Men | | Serendipity's Circle | 13 | Win 1997 | Self Published | Call of Cthulhu (Classic) | Boston |
| Thirteenth Bak'tun | 101-139 | A Time for Sacrifice | NCG-TFS-HC-01 | 2020 | New Comet Games | Call of Cthulhu (Classic) | Mexico; 1927 |
| The Thirteenth Man | | Nightscapes | 13 | May 2000 | Self Published | Call of Cthulhu (Classic) | Maine; 1925; December |
| The Thirteenth Man | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Maine; December; 1925 |
| The Thirteenth Man, Part 1 | | Chaosium Digest | v30n06 | Feb 2000 | Chaosium | Call of Cthulhu (Classic) | Maine; December; 1925 |
| The Thirteenth Man, Part 2 | | Chaosium Digest | v30n07 | Feb 2000 | Chaosium | Call of Cthulhu (Classic) | Maine; December; 1925 |
| Thirties-Something | 30-33 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic) | |
| thirtiessomething: Roleplaying CoC in the 1930s | 46-49 | The Last Province | 2 | Dec 1992 | Last Province Publishing | Call of Cthulhu (Classic) | |
| This is the Malt? | | Serendipity's Circle | 18 | | Self Published | Call of Cthulhu (Classic) | |
| This Old House | Aug 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| This Old Tomb | | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Thompson's Bridge | C:1-10 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) | Maine; 1922; Summer |
| Those Brave Women and Men | 27 | Stark, Raving Mad! | | 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Those Nightmare Wings | | Chaosium Digest | v05n10 | Feb 1994 | Chaosium | Call of Cthulhu (Classic), Space 1889 | Mars |
| Those Poor Souls Who Dwell in Light | C:46-66 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | London; February; 1924 |
| Thoth's Dagger | 91-117 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) | Egypt; Atlantic Ocean; 1920s; November; Nyarlathotep |
| Thoth's Dagger | 51-67 | Curse of the Chthonians | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic) | Egypt; Atlantic Ocean; November; 1920s; Nyarlathotep |
| Thoth's Dagger | 105-120 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | Egypt; Atlantic Ocean; 1920s; November; Nyarlathotep |
| Thoth's Dagger | 23-34 | Different Worlds | 27 | Mar 1983 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; Egypt; November; 1920s; Nyarlathotep |
| Thought He Was a Goner | | Legacy of the Reanimator | CHA6063 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Thoughts on Lovecraft and his Mythos | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Faces Book 1 | | A Thousand Faces Book 1 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Faces Book 2 | | A Thousand Faces Book 2 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Faces Book 3 | | A Thousand Faces Book 3 | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Faces Book 4 | | A Thousand Faces Book 4 | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Faces Book 5 | | A Thousand Faces Book 5 | | Dec 2025 | Chaosium | Call of Cthulhu (Classic) | |
| A Thousand Miles | 144-157 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | India; January; 1930 |
| The Threat of the Toxic Totem | | The Threat of the Toxic Totem | YH-C-12 | Aug 2025 | Chaosium | Call of Cthulhu (Classic) | Egypt; 1937 |
| The Threat of the Toxic Totem | 161-171 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Three Clue Rule | 73-78 | Bayt al Azif | 5 | May 2023 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| The Three Murders of The Fianna | 15-28 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | 1920s |
| Three Poems | 14-17 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Three Poems | 229-? | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Three Point Landing | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Thrice Blessed Mohammedan Steel | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Throne of Nyarlathotep | | Cthulhu Maps - Throne of Nyarlathotep | 100 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Through Good Times and Bad: Politics and Law | 13-30 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Through the Eye of a Needle | 217-236 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Thrown Voices | | Thrown Voices | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Thrusher Manor | 1-20 | Thrusher Manor | | Dec 2019 | Self Published | Call of Cthulhu (Classic), GURPS (Horror) | Mediterranean Sea; 1689 |
| Thunder in the Blood | 27-52 | End of the World | 0005 | 1994 | Triad Entertainments | Call of Cthulhu (Classic) | Honduras; 1924; Azathoth |
| Tibetan Gods and Monsters | 54-64 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Tibetan History and Culture | 6-25 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| The Tibetan Interior | 135-151 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Tibet; 1927; Azathoth |
| Tibetan Miscellany | 57-69 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| A Tibetan Monastery | | Cthulhu Maps - A Tibetan Monastery | 073 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Tibetan Religion | 26-53 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| Tickets Please | | Tickets Please | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean |
| Tidal Watch of Brinae | | Tidal Watch of Brinae | | Nov 2025 | Chaosium | Call of Cthulhu (Classic) | Rhode Island; January; 1924 |
| Ties That Bind | 76-95 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s; Byakhee |
| Tiger in Human Skin | | Tiger in Human Skin | | Mar 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Tihuanaco | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic) | |
| The Tikbalang, Horse demon of the Philippines | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Tillinghast Lamp | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Time | 134-139 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| The Time and Place | 65-70 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| Time and the Serpent | 78-90 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Classic) | Chicago; Arkham; November; 1927; Serpentman |
| A Time For Decisions | 145-163 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | 1931 |
| A Time of Darkness | 51-72 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Time of the Serpent | | Time of the Serpent | | Sep 2020 | Chaosium | Call of Cthulhu (Classic) | Chicago; 1920s |
| Time Rescue | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| The Time Shadow Over Darnesville | | The Time Shadow Over Darnesville | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | 1920s; Great Race of Yith |
| Time-Frozen | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Time-Tangled | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Timeless Sands of India | 2-32 | Age of Cthulhu Vol. VII: The Timeless Sands of India | 7007 | 2012 | Goodman Games | Call of Cthulhu (Classic) | India; 1920s; Summer; Spring; Great Race of Yith |
| The Timeless Terror | 3-12 | The Timeless Terror | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | Boston; 1922; October; Yog-Sothoth |
| Timeline | 62-63 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Timeline and Events | 48-74 | Sun Spots | 4 | 2017 | Weird 8 | Call of Cthulhu (Classic) | |
| Timeline for 1925/26 | 556-563 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Timeline for 1925/26 | 692-702 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| A Timeline for Britain and Europe 2918-1939 | 26-27 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) | |
| Timeline for the 1920s | B:2-4 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Timeline for the 1920s | 96-98 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Timeline for the 1920s | C:2-4 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Timeline of British East Africa | 215-218 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Tips, Skills, and Professions for Horror Games | 19 | Space Gamer | 76 | Sep 1985 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| The Titan in the Crypt | 101-113 | The Nyarlathotep Cycle | CHA6019 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Tiyanak | May 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| To All the Shapes at Sea | 49 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | Boston; August |
| To Awaken What Never Sleeps | 9-20 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic) | New York; August; 1928 |
| To Drakmar | 158-171 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | Nepal; 1930; January |
| "?To Have An Invisible Monster" | Sep 2002 | Pyramid Volume 2 | | | Steve Jackson Games | Call of Cthulhu (Classic) | |
| To Serve Man: Recipies in Anthropophagy for Call of Cthulhu | 15-? | Polyhedron | 133 | Dec 1998 | TSR | Call of Cthulhu (Classic) | |
| To the Dark Tower | 197-234 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic) | Antarctica; December; 1933; Elder Thing |
| To the Dust Returned | 29-40 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) | South Dakota; 1935 |
| To The Future | | Chaosium Digest | v27n06 | Jan 1999 | Chaosium | Call of Cthulhu (Classic) | |
| To the Future | 1999 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| To The Future | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| To The Gates of the Sun | 51-96 | The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) | China; 1920s |
| To The Tolling of the Bell | | To The Tolling of the Bell | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| To Wake, Perchance to Dream | 102-105 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| To Walk on the Earth in Carcosa | 79-100 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | Carcosa; December; 1928 |
| The Toast of London | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London; August |
| The Toast of London | 30 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London; August |
| The Toast of London | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London; August |
| Toil in the Fields | 23-40 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | Haiti |
| The Toll of Madness | 10-12 | Protodimension | 18 | Win 2014 | Kinstaff Media | Call of Cthulhu (Classic) | |
| Tomb of Nephren-Ka | | Cthulhu Maps - Tomb of Nephren-Ka: Temple | 038 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Tomb of Nephren-Ka: Burial Chamber | | Cthulhu Maps - Tomb of Nephren-Ka: Burial Chamber | 039 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Tomb of Set | 1998 | Ubar | | | Self Published | Call of Cthulhu (Classic) | Egypt; June; 1921 |
| The Tomb of the Old Ones | 369-464 | The Antarktos Cycle | CHA6039 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Tome of the Dead | 207-211 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Dungeons and Dragons, Call of Cthulhu (Classic), Pathfinder | Pennsylvania; 1926 |
| Tomes of Cthulhu | | Tomes of Cthulhu | AGT0064 | 2016 | Azukail Games | Call of Cthulhu (Classic) | |
| Tomes of Cthulhu II | | Tomes of Cthulhu II | AGT0089 | 2018 | Azukail Games | Call of Cthulhu (Classic) | |
| Tomes of Eldritch Lore | 224-238 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| Tomes of Eldritch Lore | 224-238 | Keeper Rulebook | CHA23175 | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Tomes of Eldritch Lore Expanded | 3-64 | Tomes of Eldritch Lore Expanded | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Tonga | 6-31 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Tonga; 1991 |
| The Tongs of America | 16-19 | Different Worlds | 43 | Jul 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Too Many Masks | 24-25 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Too Many Murderers | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| The Tools of the Bloody Tongue | 122-123 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Tools of the Bloody Tongue | 111-112 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Tools of the Trade | 69-114 | The 1920s Investigator's Companion | CHA2370 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Torc of Pnoth | | Tempestuous Orifice | 4 | 1984 | Self Published | Call of Cthulhu (Classic) | |
| Touch Me Not | Apr 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | |
| Touched by the Faries | 65-69 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Tourist Trap | | Serendipity's Circle | 15 | | Self Published | Call of Cthulhu (Classic) | |
| The Tower | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Canada |
| A Town History | 4-10 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| A Town of Discontent | 1998 | Ubar | | | Self Published | Call of Cthulhu (Classic) | England; June; Glaaki; Flying Polyp; Dark Young of Shub-Niggurath |
| The Town of Tontine | 13-24 | Serendipity's Circle | 2 | Mar 1995 | Self Published | The Whispering Vault, Call of Cthulhu (Classic), Bloodshadows, Dark Conspiracy | Iowa |
| The Tractate | 60-69 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1939 |
| Tradewinds | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| Traffic Stop | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Trail of the Golden Spike | 3-27 | Trail of the Golden Spike | Hero 14 | 1984 | Hero Games | Call of Cthulhu (Classic), Justice Inc, Daredevils, Mercenaries, Spies and Private Eyes | |
| Trail of the Loathsome Slime | 2-15 | Trail of the Loathsome Slime | MM1 | 1985 | Games Workshop | Call of Cthulhu (Classic) | Atlantic Ocean; England; November; 1983 |
| Trail of the Monolith | | Trail of the Monolith | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Trail of the Mummy | Jun 2016 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | Chicago; March; 1934 |
| The Trail of Tsathoggua | 4-29 | The Compact Trail of Tsathoggua | CHA2362 | 1997 | Chaosium | Call of Cthulhu (Classic) | Greenland; Gnoph-Keh; Formless Spawn of Tsathoggua |
| The Trail of Tsathoggua | 4-21 | The Trail of Tsathoggua | CHA2308 | 1984 | Chaosium | Call of Cthulhu (Classic) | Greenland; Gnoph-Keh; Formless Spawn of Tsathoggua |
| Trail of Yig | 99-109 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Dunwich; Arkham; Yig |
| A Train Station | | Cthulhu Maps - A Train Station | 049 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Tramps and Beggars | | Dagon | 6 | Mar 1985 | Self Published | Call of Cthulhu (Classic) | |
| Trans-dimensional Mites | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Transatlantic Terror | 2-9 | Age of Cthulhu: Transatlantic Terror | 7000 | 2014 | Goodman Games | Call of Cthulhu (Classic) | Atlantic Ocean; 1920s |
| Transatlantic Terror | 4-11 | Goodman Games Gen Con 2014 Programme Guide | | 2014 | Goodman Games | Call of Cthulhu (Classic) | Atlantic Ocean; 1920s |
| Transdimensional Cannibal Cyberdemons on Virtual Weed | | People of Innsmouth | 13 | | Self Published | Call of Cthulhu (Classic) | |
| Transference | | Serendipity's Circle | 14 | Spr 1998 | Self Published | Call of Cthulhu (Classic) | |
| Transgression | 159-165 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic) | New York |
| The Transgressions of Effram Harris | 35-44 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Transition of Zadok Allen | 224-228 | The Innsmouth Cycle | CHA6017 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Transport | 26-30 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic) | |
| Transport | 58-59 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Transport | 214-215 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Transport | 27-30 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Transport & Travel | 28-44 | 1920s Investigator's Companion Vol. I | CHA2343 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| A Transylvanian Crypt | | Cthulhu Maps - A Transylvanian Crypt | 115 | Sep 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Travel | B:18-19 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Travel | 109-110 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Travel | C:18-19 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Travel | 142-143 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Traveling: Land, Sea and Air | 250-253 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) | |
| Traveling: Land, Sea and Air | 284-287 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| Travelling Armed | A:33-35 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic) | |
| Travelling in Tibet | 48-57 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Travelling to Tibet | 84-92 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic) | |
| The Travesty | 20-31 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Wisconsin; December; 1920s |
| The Travesty | 2-9 | Of Keys and Gates | PAG2101 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Wisconsin; December; 1920s |
| The Travesty | 41-50 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | Wisconsin; December; 1920s |
| The Travesty | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | Wisconsin; December; 1920s |
| The Treader of Dust | 162-171 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Treasure Hunt | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| The Treasure Hunt, Part 1 | | Chaosium Digest | v37n12 | Sep 2003 | Chaosium | Call of Cthulhu (Classic) | |
| The Treasure Hunt, Part 2 | | Chaosium Digest | v38n01 | Sep 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Treasure of the Secret Way | 112-131 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| Tremors at the Farms | | Cthulhu Maps - Tremors at the Farms | 080 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| Tremors Below | 70-87 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| Trent Sterling's Guide to the Wild | | Trent Sterling's Guide to the Wild Volume 1 | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | |
| Trials of Boozer | | Trials of Boozer | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | South Carolina |
| Trick or Treat | 112-118 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | 1980s; Halloween; Non-Mythos |
| Trilogy of Terror | 50-52 | White Dwarf | 97 | Jan 1988 | Games Workshop | Call of Cthulhu (Classic) | |
| The Triptych of van Nacht | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Trophies | | Trophies | | 2000 | Self Published | Call of Cthulhu (Classic) | Scotland; June; 1923 |
| Trophies and Curiosities | 24-27 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Tropical Death | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | London |
| Tropical Death | 18 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | London |
| Tropical Death | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Trouble at Scarrick Isle | 3-8 | Trouble at Scarrick Isle | | Oct 2024 | Chaosium | Call of Cthulhu (Classic) | Massachusetts |
| Trouble in Budapest | 26-28 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Trouble in Pinewood | | Trouble in Pinewood | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Trouble on the Rock | | Trouble on the Rock | | Dec 2023 | Chaosium | Call of Cthulhu (Classic) | San Francisco; 1930s |
| Trouble on the Tracks | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Winter; 1920s |
| True Crimes! | 64 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The True History of Friedrich Wilhem Von Juntz | 106-111 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic) | |
| True Knowledge Expels the Night | | Classic Investigators 1920s Volume One | SFX7000 | Nov 2024 | Stygian Fox | Call of Cthulhu (Classic) | |
| True Magic | 2000 | wtimmins.tripod.com | | | Self Published | Call of Cthulhu (Classic) | |
| True Magick | 440-442 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| True Magick | 567-570 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Trust Me | 221-227 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Trust No One - Especially Yourself (CTHULHU) | | Chaosium Digest | v29n03 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | |
| The Truth Shall Set You Free | 81-126 | Unseen Masters | CHA2384 | 2001 | Chaosium | Call of Cthulhu (Classic) | |
| Trutz Blanke Hans | | Trutz Blanke Hans | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | North Sea; January |
| Tuchulcha | 90-92 | Ye Booke of Tentacles | 2 | 1999 | The Chaos Society | Call of Cthulhu (Classic) | |
| The Tunnels Under Temple Meads | | The Tunnels Under Temple Meads | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | England; July; 1929 |
| The Turin Guidebook | 2000 | The Mana Bros | | | Self Published | Call of Cthulhu (Classic) | |
| Turkish Delight | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Europe |
| Turkish Delight | 23-24 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Europe |
| Turkish Delight | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Europe |
| A Turn of Fate | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Turn to Stone | 43-76 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | Iceland |
| Turn to Stone | 1-28 | Turn to Stone | | 2007 | Self Published | Call of Cthulhu (Classic) | Iceland; 1920s |
| Turnabout | 80-84 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| Turua | 59-72 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic) | Louisiana; 1991 |
| Tusk Mice | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Twelfth Book of Moses | 20-21 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Twelfth Book of Moses | 102-103 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Classic) | |
| Twelve Investigators | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Twenties: Year by Year | A:20-24 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Twilight | | Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Twilight | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Twilight of the Fifth Sun | 71-84 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | New Orleans |
| Twilight of the Fifth Sun | 71-83 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | New Orleans |
| Twilight Time | 133-136 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | Iceland |
| The Twinning of Alice Twickelbee | | The Twinning of Alice Twickelbee | | Jun 2022 | Chaosium | Call of Cthulhu (Classic) | Ohio; 1930s |
| Twists, Slugs and Roscoes | Mar 1998 | hyperwerx.net | | | Self Published | Call of Cthulhu (Classic) | |
| Two Christmas Goats | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic) | December |
| Two Christmas Goats | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | December |
| The Two Dimensional Horror | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic) | 1920s |
| Two Minutes on High | 48-63 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Boston; 1920s; Y'Golonac; Dimensional Shambler |
| Two New Character Templates for Africa | 274-276 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Two New Skills | 13 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Two New Types of Insanity | 19 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Two of Our Bodies Are Missing | 5-9 | Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic) | London; 1923 |
| Two Sages for Call of Cthulhu | | Chaosium Digest | v03n02 | Jul 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Two-Fisted Horror | | The Blasphemous Tome | 7 | Jun 2021 | Self Published | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch1 - Bolivia | | Cthulhu Maps - The Two-Headed Serpent - Ch1 - Bolivia | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch2 - New York | | Cthulhu Maps - The Two-Headed Serpent - Ch2 - New York | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch3 - Borneo | | Cthulhu Maps - The Two-Headed Serpent - Ch3 - Borneo | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch4 - Oklahoma | | Cthulhu Maps - The Two-Headed Serpent - Ch4 - Oklahoma | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch5 - Iceland | | Cthulhu Maps - The Two-Headed Serpent - Ch5 - Iceland | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch6 - Belgian Congo | | Cthulhu Maps - The Two-Headed Serpent - Ch6 - Belgian Congo | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch7 - Calcutta | | Cthulhu Maps - The Two-Headed Serpent - Ch7 - Calcutta | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch8 - Snake Island | | Cthulhu Maps - The Two-Headed Serpent - Ch8 - Snake Island | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Two-Headed Serpent - Ch9 - Mu | | Cthulhu Maps - The Two-Headed Serpent - Ch9 - Mu | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Type Case | Mar 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Typewriter | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Typical Dunwich Farm | 16-17 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Ubbo-Sathla | | Dagon | 4 | Oct 1984 | Self Published | Call of Cthulhu (Classic) | |
| Ubbo-Sathla | 88-97 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Uebbho-Ko | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Uisge Beatha | 197-225 | Shadows Over Scotland | CB7353 | 2011 | Cubicle 7 | Call of Cthulhu (Classic) | Scotland; Deep One |
| Ulms | 16-18 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Classic) | |
| Ulthar and Beyond | B:36-44 | Spawn of Azathoth | CHA2316-X | 1986 | Chaosium | Call of Cthulhu (Classic) | Dreamlands; 1927; Yibb-Tstll |
| Ulthar and Beyond | 106-121 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic) | Dreamlands; 1927; Yibb-Tstll |
| Ultima Ratio | 33-44 | Bayt al Azif | 4 | Jan 2022 | Bayt al Azif Inc | Trail of Cthulhu, Call of Cthulhu (Classic) | 1930s |
| Ultima Thule | | Ultima Thule | | Jun 2020 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; Summer; 1922 |
| Ululatus Anima | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Unborn | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Unboxing | | Unboxing | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | Arkham; Nyarlathotep |
| The Uncanny Curse of Sekhmet | 1-20 | The Uncanny Curse of Sekhmet | | Jun 2020 | Self Published | Broken Compass, Call of Cthulhu (Classic), GURPS, Risus | Italy; Egypt; August; 1936 |
| Uncle George's Halloween Party | | Serendipity's Circle | 12 | | Self Published | Call of Cthulhu (Classic) | Massachusetts; Halloween |
| Uncle George's Halloween Party | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Massachusetts; Halloween |
| Uncle George's Murder Mystery Party | | Serendipity's Circle | 18 | | Self Published | Call of Cthulhu (Classic) | Massachusetts |
| Uncle Timothy's Will | 6-15 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic) | Vermont; April; 1928; Demon |
| Unconventional Firearms | 62-66 | The Unspeakable Oath | 23 | Aug 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Uncovering Berlin | | Berlin: The Wicked City | CHA23161 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Under a Blood Red Sky | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Under a Winter's Snow | | Under a Winter's Snow | FXC-09 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | North Dakota; 1921; Winter |
| Under New Management | 1998 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Under New Management | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Under the Big Top | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Under the Boardwalk | 7-34 | Farewell, My Sanity | CHA0346 | 2007 | Chaosium | Call of Cthulhu (Classic) | Los Angeles; 1920s; Deep One |
| Under the Deep | | Under the Deep | | 2013 | Self Published | Call of Cthulhu (Classic) | Pacific Ocean; 1920s |
| Under the Dunes | | Under the Dunes | | Mar 2023 | Chaosium | Call of Cthulhu (Classic) | Michigan |
| Under the Frozen Grove | | Under the Frozen Grove | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | Italy; 1933 |
| Under the Knife: Psychosurgery | 74-78 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Under the Red Light | 1-10 | Under the Red Light | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Caribbean Sea; 1920; February |
| The Underground | 97-117 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| The Underground | 119-139 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Underground Menace | A-D | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | Democratic Republic of the Congo; Byakhee; Flying Polyp |
| Underground Menace | 18-21 | Different Worlds | 19 | Feb 1982 | Chaosium | Call of Cthulhu (Classic) | Michigan; 1920s; Dark Young of Shub-Niggurath |
| The Underground Menace | 102-106 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Understudy | 52-61 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Undying Ashuha | Jul 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Undying Leaders | 3-15 | Undying Leaders | CHA0343 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Undying Leaders of Tibet | 35-77 | Undying Leaders | CHA0343 | 2007 | Chaosium | Call of Cthulhu (Classic) | Tibet; 1920s |
| Unexpected Guest | Aug 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Mi-Go |
| Unfortunate Events | | Unfortunate Events Deck | CHA23139-KD3 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Unfortunate Events | | Keeper Decks | CHA23139-KD | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Unfortunate Events | | Keeper Decks | CHA23184 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Unfortunate Events | | Unfortunate Events Deck | CHA23184-KD3 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Unhealthy Occupation | 62-75 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | Virginia |
| Unknowable - About the Gods of the Mythos | 9-22 | Malleus Monstrorum Volume 2: Deities of the Mythos | CHA23169 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Unknowable - About the Gods of the Mythos | B:9-22 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| The Unnamable | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Unnameable Undone | 1:47 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Unnatural Behaviour | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Unnatural Behaviour | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Unnaturally Familiar: Fiendish Friends for Immortal Sorcerers | | Chaosium Digest | v36n05 | May 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Unnoticed | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Unquiet Spirits | 60-61 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Unquiet Spirits | 70-71 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| The Unraveling | | Al-Azif Unearthed: The Unraveling | | Jan 2023 | Chaosium | Call of Cthulhu (Classic) | Boston; Summer; 1925 |
| The Unremembered | | The Unremembered | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | Indiana; September; 1921 |
| Unseen Mirror | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| An Unsettled Mind | 102-117 | Bumps in the Night | PAG1014 | 2012 | Pagan Publishing | Call of Cthulhu (Classic) | Maryland; 1924; June; Non-Mythos |
| Unspeakable Artifacts | 41-43 | Vision | 3 | Oct 1992 | Self Published | Call of Cthulhu (Classic) | |
| The Unspeakable Betrothal | 185-197 | Mysteries of the Worm | CHA6037 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Unspeakable Secrets Made Easy | 92-95 | Dragon | 150 | Oct 1989 | TSR | Call of Cthulhu (Classic) | |
| Unusual Locations | B:38-51 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Updated Investigators for The Lightless Beacon | Apr 2023 | craigpay.com | | | Self Published | Call of Cthulhu (Classic) | |
| Upon an Altar in the Fields | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Upper House | 172-191 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | Nepal; February; 1930 |
| The Upper House | | Chaosium Digest | v35n11 | Mar 2002 | Chaosium | Call of Cthulhu (Classic) | Nepal; 1928 |
| Urayuli | Jan 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ursa Major | | Ursa Major | | Feb 2025 | Chaosium | Call of Cthulhu (Classic) | |
| US Handguns for Call of Cthulhu and Gaslight | 7-16 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Gaslight), Call of Cthulhu (Classic) | |
| Using and Creating Monsters | 9-30 | Malleus Monstrorum Volume 1: Monsters of the Mythos | CHA23168 | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Using and Creating Monsters | A:9-30 | Malleus Monstrorum Slipcase Set | CHA23170-X | 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Using Children as Investigators | | Chaosium Digest | v03n06 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Using Cthulhu Mythos Knowledge | | Chaosium Digest | v31n09 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) | |
| Using Customized Newspaper Articles | 29-31 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Using Customized Newspaper Articles | 32-35 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Using Folk Magic in Call of Cthulhu Games | 22-27 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Using Folklore in Call of Cthulhu Games | 14-20 | Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) | |
| Using Jackson Elias | 54-57 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Using Jackson Elias | 62-66 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Using Music | 28-29 | Cryptych | 8 | Oct 1994 | ILM International | Call of Cthulhu (Classic) | |
| Using Qi | 9-11 | The Dark Times | 2 | Jan 2018 | Self Published | Call of Cthulhu (Classic) | |
| The Usual Suspects | 10-11 | Bits and Pieces | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Sweden; 1920s |
| Utilities | 280-317 | Call of Cthulhu | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) | |
| Utilities | 280-317 | Call of Cthulhu | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) | |
| Utilities | 280-317 | Call of Cthulhu | CHA2009-H | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| The Utmost Abomination | 159-170 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Utressor | 171-183 | The Book of Eibon | CHA6026 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Vagina Dentata | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Valley of Shadows | | Valley of Shadows | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Romania; 1936; Summer |
| Valley of Souls | | Valley of Souls | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | Bolivia |
| Valley of the Four Shrines | 32-48 | Fragments of Fear | CHA2310 | 1985 | Chaosium | Call of Cthulhu (Classic) | |
| Valor, An Enchanted Weapon | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Vampulhu | | www.kisa.ca/vtm | | | Self Published | Call of Cthulhu (Classic), Vampyre the Masquerade | |
| The Vanguard Club | 31-37 | d20 Call of Cthulhu Gamesmaster's Pack | CHA8801 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Vanished | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| The Vanishing Conjurer | B:5-23 | Statue of the Sorcerer, The Vanishing Conjurer | CHA2318 | 1986 | Chaosium | Call of Cthulhu (Classic) | London; 1920s |
| Variant Combat Rules for call of Cthulhu | 32-33 | Different Worlds | 29 | Jun 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Various Resources | 38-118 | Gatsby and the Great Race | CHA0324 | 2005 | Chaosium | Call of Cthulhu (Classic) | |
| The Vase of Sands | 35-36 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | England |
| The Vase of Sands | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Vaudeville | | Vaudeville | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) | 1926; November |
| Vaudeville | 45-55 | American Empire | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | November; 1926 |
| The Vault | 3-24 | The Vault | CHA0358 | 2008 | Chaosium | Call of Cthulhu (Classic) | Maine; September; 1927 |
| Vault of the Consumed | 102-109 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Vaults of Abomr | 44-66 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| The Vaults of Kolyma | 76-83 | Athenaeum Illuminatus | | Oct 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Vehicle Handouts | | Vehicle Handouts | | Aug 2020 | Chaosium | Call of Cthulhu (Classic) | |
| Vehicle Handouts Vol 2 | | Vehicle Handouts Vol 2 | | Jun 2021 | Chaosium | Call of Cthulhu (Classic) | |
| Vehicles and Transportation | 352-361 | Japan Empire of Shadows | | Jul 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Vehicular Combat and Movement | | Chaosium Digest | v22n01 | Sep 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Veiled Societies | 139-158 | Cthulhu Live: Lost Souls | 0005 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) | |
| Vengeance From Beyond | 4-14 | Monophobia | 1001 | 2010 | Unbound Publishing | Call of Cthulhu (Classic) | Arkham |
| Vengeful Bones | 83-91 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | |
| The Vengful Dead | 24-47 | Bumps in the Night | PAG1014 | 2012 | Pagan Publishing | Call of Cthulhu (Classic) | Virginia; 1921; April; Psycopath |
| Venom Grass | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Venom of the Vampire | 180-181 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | 1937 |
| Verdict in Court | | Cthulhu Maps - Verdict in Court | 069 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Vernissage | 33-58 | From Beyond | | Nov 2023 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| The Vernissage | | The Vernissage | | Dec 2019 | Chaosium | Call of Cthulhu (Classic) | Poland; 1920s |
| The Vestals | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Vestals of Ii-Ha | Nov 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Viceroy of India | 136-143 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | At Sea; December; 1929 |
| The Victim | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Victorian Houses (1850-1900) | 21-44 | This Old Haunted House | CHA0361 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Victorian Houses (1850-1900) | 20-43 | This Old Haunted House, Too | CHA0373 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Vigilante Justice | 2-37 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Kentucky; 1900; Lloigor |
| Vikki Cantfield, Shan Loving Party Girl | 1 | Tuesday Terribles | 1 | Sep 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Vile Bodies | 88-92 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | London; 1920s |
| Village Guide | 119-120 | Cthulhu Ireland | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| A Village in the Jungle | | Cthulhu Maps - A Village in the Jungle | 111 | Jan 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| The Vineyard | Apr 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Washington; 1919 |
| The Violet Current | | The Violet Current | YH-C-11 | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Viridescent Caecillians | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Visceral and Emotional Damage | | Visceral and Emotional Damage | | Mar 2019 | Chaosium | Call of Cthulhu (Classic) | |
| Vision of Madness | | Cthulhu Maps - Vision of Madness | 116 | Sep 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| A Vision Shared | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s |
| Visions from Yaddith | 78-81 | The Arkham Gazette | 4 | Nov 2021 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Vivomancer | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Vladimir Dracula, Prince Of Walachia, a Favored of Nyarlathotep | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Voice from the Well Part 1 | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| The Voice from the Well Part 2 | | Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) | |
| Voice Out of Time | 69-70 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic) | |
| Voice Out of Time | 89-90 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | |
| Voices | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Void Speck | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Von denen Verdammten | 98-99 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Von Unausprechlichen Kulten | | Chaosium Digest | v04n04 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Voodoo | 58-70 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Voodoo | 58-70 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Voodoo | 37-39, 41-45 | Pyramid | 1 | May 1993 | Steve Jackson Games | Call of Cthulhu (Classic) | |
| The Voodoo House | | Cthulhu Maps - The Voodoo House | 034 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Voodoo Murders | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Vortiron | 24 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Vovina Codex | | The Vovina Codex | | Jul 2025 | Chaosium | Call of Cthulhu (Classic) | |
| The Voyage Begins | 4:58 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Voyage Continues | 7:54 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Voyage of Terror | | Voyage of Terror | | Feb 2019 | Chaosium | Call of Cthulhu (Classic) | Atlantic Ocean; 1925 |
| Voyage of the Empress | 2006 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Atlantic Ocean |
| The Voynich Manuscript | 30-32 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Vulthoom | 133-161 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Wagey Cage Shoggoths | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Wail of the Witch | 15-24 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1928 |
| The Wail of the Witch | M1-M7 | Different Worlds | 30 | Sep 1983 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920s |
| Waiting for the Hurricane | 158-175 | Pulp Cthulhu | CHA23107 | 2016 | Chaosium | Call of Cthulhu (Classic) | Florida; September; 1935; Deep One |
| Wake the Dead | | Chaosium Digest | v32n01 | Jul 2000 | Chaosium | Call of Cthulhu (Classic) | October; 1920s |
| Wake the Dead | | Nightscapes | 14 | Aug 2001 | Self Published | Call of Cthulhu (Classic) | October; 1920s |
| Wake the Dead | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | October; 1920s |
| Wake Up Dead | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Walk Among Us | | Walk Among Us | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) | New Orleans |
| A Walk in the Park | 39-55 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic) | London; November; 1928 |
| Walker in the Wastes Player Aid Kit | | Walker in the Wastes Player Aid Kit | WWPA | 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Wall of Bones | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Wallmaster | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Wampus Cats | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Wanderer | 28-43 | The Arkham Evil | T-1 | 1983 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | Arizona; July; 1923 |
| Wandering Minds | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) | 1935 |
| War Buddy | 568-583 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic) | Maine; 1920s |
| War Buddy | 1-16 | War Buddy | | 1998 | Self Published | Call of Cthulhu (Classic) | Maine; 1920s |
| War Buddy | 29-44 | Opifex Bimonthly | 16 | Nov 1998 | Self Published | Call of Cthulhu (Classic) | Maine; 1920s |
| War Experiences for the 1920s | | Chaosium Digest | v04n02 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) | |
| War on the Doorstep: The Gazetteer of Ireland | 10-13 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Ware the Moon | | Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) | |
| A Warehouse on the Docks | | Cthulhu Maps - A Warehouse on the Docks | 067 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| The Warren | 63-70 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1921; Lesser Race |
| The Warren | 140-150 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1921; Lesser Race |
| The Warren | 65-72 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1921; Lesser Race |
| Wasted Youth | 29-46 | New Tales of the Miskatonic Valley | MRP0003 | 2008 | Miskatonic River Press | Call of Cthulhu (Classic) | Arkham |
| Wasted Youth | 29-52 | New Tales of the Miskatonic Valley | 3009 | 2020 | Stygian Fox | Call of Cthulhu (Classic) | Arkham |
| Wasteland | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | France |
| Wasteland | 22-23 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | France |
| Wasteland | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | France |
| Watcher in the Bayou | 1-17 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Classic) | Louisiana |
| Watcher in the Valley | 51-75 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; Lloigor |
| The Watchers | 61 | The Unspeakable Oath | 23 | Aug 2013 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Watchers Below | 121-146 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) | London; February; 1926 |
| The Watchers of Easter Island | 46-57 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Oceania; 1920s; Deep One |
| The Watchers of Easter Island | 105-125 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Oceania; 1920s; Deep One |
| The Watchers of Easter Island | 46-57 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Oceania; 1920s; Deep One |
| The Watchers of Walberswick | 4-6 | White Dwarf | 50 | Feb 1984 | Games Workshop | Call of Cthulhu (Classic) | England; 1934 |
| The Watchers of Walberswick | 4-6 | The Best of White Dwarf III | | 1985 | Games Workshop | Call of Cthulhu (Classic) | |
| A Waterfall in the Jungle | | Cthulhu Maps - A Waterfall in the Jungle | 035 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| A Waterfall in the Jungle | | Cthulhu Maps - A Waterfall in the Jungle | 122 | Nov 2024 | Lovemaps | Call of Cthulhu (Classic) | |
| Watering Hole | 58-63 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| The Waters of Sulis | 113-114 | Avalon - The County of Somerset | CB7352 | 2010 | Cubicle 7 | Call of Cthulhu (Classic) | England; Great Old One |
| The Waters Over Heaven | | Cthulhu Hardboiled Campaign | | | Self Published | Call of Cthulhu (Classic) | Los Angeles; 1928; January |
| The Waters Over Heaven | | The Waters Over Heaven | | 2003 | Self Published | Call of Cthulhu (Classic) | Los Angeles; January; 1928 |
| Way Down. In Ioway. | 56-73 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Classic) | Iowa; 1920s; Halloween |
| Way of Life | 10-12 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| The Wayang Theatre | Aug 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| We All Go Mi-Go!!! | | We All Go Mi-Go!!! | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) | Vermont; 1920s |
| We Have Been, We Are, We Will Be | | We Have Been, We Are, We Will Be | SFX-3003 | 2018 | Stygian Fox | Call of Cthulhu (Classic) | |
| We Have Met the Enemy | 122-137 | Mortal Coils | PAG1007 | 1998 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; 1926; June |
| We're Here for Your Amusement | 43- | Dreadful Mistakes Volume 1 | | 2020 | Four Guys and a Broken Dwarf | Call of Cthulhu (Classic) | |
| A Wealth of Knowledge | | A Wealth of Knowledge | | May 2019 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| Weapons | B:22-24 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons | 113-115 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons | C:22-24 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons | 146-148 | Call of Cthulhu | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons and Artifacts | | Weapons and Artifacts Deck | CHA23139-KD4 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons and Artifacts | | Keeper Decks | CHA23139-KD | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons and Artifacts | | Keeper Decks | CHA23184 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons and Artifacts | | Weapons and Artifacts Deck | CHA23184-KD4 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Weapons and Relics Art Pack | | Weapons and Relics Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) | |
| The Weaver: a Mi-Go Device | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Wee Dram of Danger | 48-53 | The Adventurer | 5 | Dec 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | Scotland; 1923; September |
| The Weekend Retreat | | The Weekend Retreat | | | Drakat Games | Call of Cthulhu (Classic) | |
| Weeping Grandchild: A Taint of Shub-Niggurath | Oct 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Weeping Madonna | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Weird Shadow Over Innsmouth | 1-51 | Tales out of Innsmouth | CHA6024 | 2006 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome Aboard | 1:30 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| Welcome to Arkham | 27-35 | H.P. Lovecraft's Arkham | CHA8803 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Dunwich | 14-21 | Return to Dunwich | CHA2330 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Dunwich | 27-36 | H.P. Lovecraft's Dunwich | CHA8802 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Innsmouth | 13-14 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Innsmouth | 13-14 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Kingsport | 1-3 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Kingsport | 19-22 | H.P. Lovecraft's Kingsport | CHA8804 | 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Little Creek | | Welcome to Little Creek | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1920; June |
| Welcome to Rome | 6-19 | Cthulhu Invictus | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to Silkwood Motel | 3-5 | Welcome to Silkwood Motel | | Feb 2026 | Chaosium | Call of Cthulhu (Classic) | United States |
| Welcome to the University | 1-3 | Miskatonic University | CHA2352 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| Welcome to the World's Fair | | Cthulhu Maps - Welcome to the World's Fair | 068 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Welcome! | 13-20 | The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) | |
| The Well of Sacrifice | 86-105 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic) | Mexico; May; 1914 |
| Well of the Black Heart | 71-82 | Templa Illuminatus | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) | Europe |
| A Well Respected Man | Dec 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Well-Rounded Monster Hunter | 32-34, 36 | Dragon | 150 | Oct 1989 | TSR | Call of Cthulhu (Classic) | |
| The Wendigo | 39-40 | Serendipity's Circle | 6 | Win 1995 | Self Published | Call of Cthulhu (Classic) | |
| The Wendigo | 1-39 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| Wendigo Hunt | 1-19 | Wendigo Hunt | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) | Minnesota; 1920 |
| Wendigo Psychosis | 32-33 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Wereboar | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Werewolf of Averoigne | 98-114 | The KarkAsh-Ton Cycle | CHA6046 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Werewolf Root Canal | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Wernicke Boxes | | The Wernicke Boxes | | Apr 2019 | Chaosium | Call of Cthulhu (Classic) | Europe |
| West's Nurses | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Westchester House | 74-80 | The Asylum | CHA2012 | 1983 | Chaosium | Call of Cthulhu (Classic) | California; 1920s |
| The Westchester House | 113-120 | Secrets of San Francisco | CHA23108 | 2006 | Chaosium | Call of Cthulhu (Classic) | San Francisco |
| Westchester House | 68-74 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) | California; 1920s |
| The Westfield Incident | 4-23 | Bumps in the Night | PAG1014 | 2012 | Pagan Publishing | Call of Cthulhu (Classic) | New York State; May; 1915; Vampire |
| Westhaven | 52-69 | Campfire Tales | CHA23193 | Apr 2026 | Chaosium | Call of Cthulhu (Classic) | |
| What Dreams May Come | | Ye Booke of Tentacles | 6 | 2006 | The Chaos Society | Call of Cthulhu (Classic) | |
| What Goes Around, Comes Around | 106-131 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | New Hampshire; July; 1925; Outer God |
| What Goes Around, Comes Around | 124-148 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic) | New Hampshire; July; 1925; Outer God |
| What Goes Around? | 29-42 | The Unbound Book | 0 | Aug 2002 | Unbound Publishing | Call of Cthulhu (Classic) | Arkham; Winter; 1921 |
| What if Erica Carlyle Decides to Sell Roger's Books? | 102-104 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| What if Erica Carlyle Decides to Sell Roger's Books? | 112-115 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | New York; 1925 |
| What is the Call of Cthulhu? | B:3-6 | Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) | |
| What is the Call of Cthulhu? | B:3-6 | Call of Cthulhu Starter Set | CHA23178-X | 2021 | Chaosium | Call of Cthulhu (Classic) | |
| What is this Book? | 2-10 | A Peculiar Pentad | OWC4006 | 2009 | Super Genius | Call of Cthulhu (Classic) | |
| What is this Campaign Setting? | 8-9 | Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) | |
| What Lurks Below | Dec 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Connecticut |
| What Rough Beast | 7-47 | What Rough Beast | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) | Alabama; 1929; Spring |
| What The Deities Mean | 34-39 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic) | |
| What the Sea Gives Up | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
| What You Should Know About the Tommy Gun | 43-47 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| What's in the Cellar | | Gateways to Terror | CHA23140 | 2019 | Chaosium | Call of Cthulhu (Classic) | |
| What's in the Cellar? | | What's in the Cellar? | | 2017 | Chaosium | Call of Cthulhu (Classic) | New York State; 1929 |
| What's it Worth to Ya? | 21-26 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Classic) | |
| When Angels Weep | | When Angels Weep | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| When Darkness Falls | 140-191 | The Realm of Shadows | PAG1006 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | French Guiana; 1940s; Ghoul |
| When in Rome, Do as the Romans | | The Sassoon Files | SOS-HORROR4 | Jun 2025 | Sons of the Singularity | Call of Cthulhu (Classic) | Singapore; 1920s |
| When Johnny Came Marching Home | 20-23 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| When They Come | | When They Come | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) | December |
| When This Lousy War is Over | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | Massachusetts |
| When Tides Are Right | | When Tides Are Right | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | |
| Where are you Sister? | Sep 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | England |
| Where Dreams Take Root | | Where Dreams Take Root | | Oct 2025 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1930; Spring |
| Where Satan Fell | 34-35 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Where the Spirits Dwell | 66-81 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic) | Massachusetts; 1927; September |
| Where we Stand Today: Britain from 1900 | 4-6 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic) | |
| Wherein Sanity and Magic is Discussed | 10-14 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Wherein the Nature of Magic is Discussed | 3-9 | Mythos Magic | CHA0341 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| The Whisper of Ancient Secrets | | Cthulhu's Dark Cults | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) | |
| Whisper Street | Oct 25 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Whisperer in Darkness | 146-198 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Whisperer in Darkness | 156-211 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Whispering Dead | 75-102 | The Strange Cases of Rudolph Pearson | CHA6042 | 2007 | Chaosium | Call of Cthulhu (Classic) | |
| Whispers | Oct 2019 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Whispers from the Abyss | 45-65 | Whispers from the Abyss | T-4 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) | North Carolina; February; 1925 |
| Whispers from the Bramble's Heart | 4-22 | Whispers from the Bramble's Heart | | Mar 2025 | Chaosium | Call of Cthulhu (Classic) | 1920s |
| Whispers from the Crawling Chaos | 43-49 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Whispers from the Crawling Chaos | 49-55 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Whispers from Wavering Hills | | Whispers from Wavering Hills | | Nov 2021 | Chaosium | Call of Cthulhu (Classic) | Kentucky; November; 1924 |
| Whispers of Harlem | | Whispers of Harlem | DHSP2 | 2018 | Darker Hue Studios | Call of Cthulhu (Classic), Trail of Cthulhu | New York |
| Whispers of Harlem | 237-268 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Whispers out of Mind | 49-58 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Classic) | Massachusetts; October; 1928 |
| The Whitaker House | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Whitby Vampire | 20-39 | Terror from the Skies | CHA23128 | 2012 | Chaosium | Call of Cthulhu (Classic) | England; June; 1929; Deep One; Star Vampire; Insect from Shaggai |
| The White Chapel | | Cthulhu Maps - The White Chapel | 082 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The White Circle | 8-24 | The White Circle | YH-C-2 | Nov 2024 | Chaosium | Call of Cthulhu (Classic) | Minnesota; 1921 |
| White Fire | 28-34 | The Adventurer | 1 | Apr 1986 | Mersey Leisure Publishing | Call of Cthulhu (Classic) | England; 1920s; May |
| A White Winter | 57-65 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Classic) | Russia; December; 1919 |
| Whitechurch, Vermont | 4-11 | Protodimension | 10 | Aut 2011 | Kinstaff Media | Call of Cthulhu (Classic) | |
| The Whitewood Horror | 84-106 | Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Massachusetts; 1935 |
| The Whitfield House Haunting | | The Whitfield House Haunting | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | London; 1923 |
| Who Do Voodoo? | 1998 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Who Do Voodoo? | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | |
| Who is the Murderer? | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Who is the Murderer? | 6-7 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | |
| Who is the Murderer? | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Who Needs Lovecraft Country? | 21-22 | Bayt al Azif | 2 | Sep 2019 | Bayt al Azif Inc | Call of Cthulhu (Classic) | |
| Who You Gonna Call? | 2005 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Whore of Baharna | 21-35 | Adventures in Arkham Country | CHA2342 | 1993 | Chaosium | Call of Cthulhu (Classic) | Dreamlands |
| Why Abdul Al Hazred Went Mad | 234-238 | The Necronomicon | CHA6012 | 1996 | Chaosium | Call of Cthulhu (Classic) | |
| Why Abdul Al Hazred Went Mad | 351-360 | The Necronomicon | CHA6034 | 2002 | Chaosium | Call of Cthulhu (Classic) | |
| Why did he die, daddy? | 50-52 | Opifex Bimonthly | 9 | Sep 1997 | Self Published | Call of Cthulhu (Classic) | |
| The Wild Hunt | 14-80 | Unseen Masters | CHA2384 | 2001 | Chaosium | Call of Cthulhu (Classic) | New York; 1990s; Hound of Tindalos |
| The Wild Hunt | 62-64 | The Wild Hunt | | 2021 | Stygian Fox | Call of Cthulhu (Classic) | 1920s |
| Wild in the Country | Jul 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | United Kingdom |
| A Wilderness Camp | | Cthulhu Maps - A Wilderness Camp | 099 | 2023 | Lovemaps | Call of Cthulhu (Classic) | |
| The Will of Oscar Drummond | | The Will of Oscar Drummond | | Oct 2021 | Chaosium | Call of Cthulhu (Classic) | |
| The Will of the Dead | | The Will of the Dead | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | New Jersey; 1922 |
| Will the Investigators Catch the Train? | 1:16 | Horror on the Orient Express Music | AOCD7004 | 2005 | A O Music | Call of Cthulhu (Classic) | |
| The Willowdales | 103 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Wills-o-the-Wisp | Oct 2005 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Wind Has Teeth | 200-218 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Windmill of Hell | | Cthulhu Maps - The Windmill of Hell | 032 | 2022 | Lovemaps | Call of Cthulhu (Classic) | |
| Wineville Chicken Coop Murders: Sarah Louise Cawthrope Northcott | Oct 2014 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| A Wing and a Prayer | | Chaosium Digest | v36n04 | May 2002 | Chaosium | Call of Cthulhu (Classic) | |
| The Winged Cat | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Witch Tree | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | London |
| Witchcraft in Lovecraft Country | 13-26 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Witchcraft Skull | | The Witchcraft Skull | | Dec 2024 | Chaosium | Call of Cthulhu (Classic) | |
| Witches' Hollow | 70-74 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| Witches, Wizards, and Weather-Makers of New England | 89-100 | The Mythos Society Guide to New England | SKPE1423 | 2014 | Skirmisher Publishing | Call of Cthulhu (Classic) | |
| Witchlights | | The Children of Lovecraft Country | | 2020 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| With a Pinch of Salt | 18-21 | White Dwarf | 87 | Mar 1987 | Games Workshop | Call of Cthulhu (Classic) | |
| With Blue Uncertain Stumbling | 95-112 | The Island of Ignorance | GGP1301 | 2013 | Golden Goblin Press | Call of Cthulhu (Classic) | Florida; August; 1926 |
| With Malice Aforethought | 68-124 | Adventures in Arkham Country | CHA2342 | 1993 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| With the Storm | | Dread Shadows in Paradise | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | |
| The Withering Rhyme | 1-29 | The Withering Rhyme | | Jun 2025 | Chaosium | Call of Cthulhu (Classic) | Arkham; 1922; April |
| Within You Without You | 2-19 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic) | Maine; January; 1920 |
| Within You Without You | 22-32 | Of Keys and Gates | PAG2101 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) | Maine; January; 1920 |
| Within You Without You | 35-55 | The Unspeakable Oath | 1 | Dec 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Maine; January; 1920 |
| The Wizard of Wilson Creek | 49-60 | The Phantom of Wilson Creek | CHA0404 | 2013 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1927 |
| The Wizard of Wilson Creek - 1927 | 53-60 | The Phantom of Wilson Creek | | May 2023 | Chaosium | Call of Cthulhu (Classic) | North Carolina; 1927 |
| Wolf | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| A Wolf at the Door | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Werewolf |
| A Wolf at the Door | 10-11 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Werewolf |
| A Wolf at the Door | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Werewolf |
| A Wolf at the Door | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | Werewolf |
| The Wolf in the Labyrinth | 2-14 | The Wolf in the Labyrinth | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) | Arkham |
| WolfGang | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Wolfgirl in the Cupboard | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| The Wolves Outside the Cage | | Mark of the Beast | CHA6062 | 2016 | Chaosium | Call of Cthulhu (Classic) | |
| Woman in a Robe | May 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Wombwell Stones | | The Wombwell Stones | | Jan 2021 | Chaosium | Call of Cthulhu (Classic) | England; 1921 |
| Women's Fashion | 12-18 | Bloodmoon's Guide to Historical Fashions: 1920s | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) | |
| Wondrous Intelligences | 301-304 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Wondrous Intelligences | 410-413 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Wong's Chinese Emporium | | The Intermountain Matrix Newsletter | 5 | Mar 1991 | Self Published | Call of Cthulhu (Classic) | |
| Wonko Goes Ghostbusting | 15-16 | Opifex Bimonthly | 7 | May 1997 | Self Published | Call of Cthulhu (Classic) | |
| Wooden Death | 194-214 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic) | Kenya; Mi-Go |
| Woods Haven | 101-109 | Opifex Bimonthly | 21 | Sep 1999 | Self Published | Call of Cthulhu (Classic) | Massachusetts; 1929; Mi-Go; Dark Young of Shub-Niggurath |
| Woods Haven | | Chaosium Digest | v29n04 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) | Massachusetts; 1929; Mi-Go; Dark Young of Shub-Niggurath |
| Woods' Edge | Jul 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Classic) | Washington |
| Words of Wisdom | 115-125 | The 1920s Investigator's Companion | CHA2370 | 1997 | Chaosium | Call of Cthulhu (Classic) | |
| Work Therapy | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic) | London; 1890s |
| Workplace Hazards | 1999 | The Dark Gulf of N'kai | | | Self Published | Call of Cthulhu (Classic) | |
| The World | 27-64 | Tales of Manace and Mystery | YH-C-15 | Mar 2026 | Chaosium | Call of Cthulhu (Classic) | |
| World and Character Creation | 8-32 | Lands of Mystery | Hero 20 | 1985 | Hero Games | Call of Cthulhu (Classic), Justice Inc, Daredevils, Chill | |
| The Worm Has Turned | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Worm Stones | 13-16 | Fantasy Chronicles | 5 | Nov 1986 | Fantastic Publications | Call of Cthulhu (Classic) | England; 1920s |
| The Worm That Walks | 40-46 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) | Maine; 1920s; Mi-Go |
| The Worm That Walks | 92-104 | Shadows of Yog-Sothoth | CHA2397 | 2004 | Chaosium | Call of Cthulhu (Classic) | Maine; 1920s; Mi-Go |
| The Worm That Walks | 40-46 | Shadows of Yog-Sothoth | CHA2010 | 1982 | Chaosium | Call of Cthulhu (Classic) | Maine; 1920s; Mi-Go |
| Worms | 1997 | Ubar | | | Self Published | Call of Cthulhu (Classic) | |
| The Worship of Atlach-Nacha | 7-18 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Call of Cthulhu (Classic) | |
| The Worship of Tsathoggua through the Centuries | 68-77 | Worlds of Cthulhu | 6 | Jan 2009 | Pegasus Press | Call of Cthulhu (Classic) | |
| Wrath of the Sulfurer | 59-74 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) | St Vincent and the Grenadines |
| Wrath of the Wind-Walker | 244-256 | The Ithaqua Cycle | CHA6021 | 1998 | Chaosium | Call of Cthulhu (Classic) | |
| The Wreck | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Wreck of the Elizabeth Wright | 16-19 | The Arkham Gazette | 2 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic) | |
| The Writing on the Wall | | Chaosium Digest | v07n05 | Aug 1994 | Chaosium | Call of Cthulhu (Classic) | Lloigor |
| The Writing on the Wall | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic) | Lloigor |
| The Writing on the Wall | 5 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic) | Lloigor |
| The Writing on the Wall | 1990 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Lloigor |
| Written in Stone | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | Michigan |
| Wrong Side of the Tracks | Dec 2009 | talesofterror.net | | | Self Published | Call of Cthulhu (Classic) | |
| Xaazenak | Nov 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Xebi Co | | Xebi Co | | Jun 2020 | Chaosium | Call of Cthulhu (Classic) | San Francisco; 1920s |
| Xmas in Arkham | 18-? | PerChance | 7 | Dec 1991 | Self Published | Call of Cthulhu (Classic) | Arkham; December |
| Xo Tl'mi-go | Jun 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Y'ha-nthlei | 140-149 | Escape from Innsmouth | CHA2338 | 1992 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| Y'ha-nthlei | 139-145 | Escape from Innsmouth | CHA2371 | 1997 | Chaosium | Call of Cthulhu (Classic) | Innsmouth; February; 1928; Deep One |
| The Yakobi Island Artifact | 24 | Protodimension | 20 | Sum 2014 | Kinstaff Media | Call of Cthulhu (Classic) | |
| Yara-ma-yha-who | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Ye Book of Comunicacions with ye Angel Dzyon | 212-214 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Ye Book of Comunicacions with ye Angel Dzyon | 196-198 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic) | |
| Ye Booke of Monstres Index | | Chaosium Digest | v06n11 | Jun 1994 | Chaosium | Call of Cthulhu (Classic) | |
| Yeah, But What Does it Look Like? | 21 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Yeah, But What Does it Look Like? | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Year of the Serpent | | Year of the Serpent | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) | New York; February; 1917 |
| Yellow Baboon / Sacred Animal of Ancient Gods | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Yellow Death | | The Yellow Death | | Feb 2022 | Chaosium | Call of Cthulhu (Classic) | 1927 |
| The Yellow Miasma | Oct 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| The Yellow Sign | 38-53 | The Hastur Cycle | CHA6020 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| The Yellow Sign | 42-59 | The Hastur Cycle | CHA6001 | 1993 | Chaosium | Call of Cthulhu (Classic) | |
| Yg'bh | Mar 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Yggdrasil | 114-132 | The Sevenfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic) | Iceland |
| The Yll Virus | | Chaosium Digest | v37n08 | Apr 2003 | Chaosium | Call of Cthulhu (Classic) | |
| Yog-Sock'thoth | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Yohualtepoztli | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| You and Me: Taint of Shub-Niggurath | Oct 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| You are Cordially Invited | 33-37 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic) | |
| You are Cordially Invited | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic) | |
| You are What You Eat | 14-22 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Classic) | Nightgaunt |
| You in Your Small Corner | 18-21 | Dagon | 20 | Nov 1987 | Self Published | Call of Cthulhu (Classic) | 1920s |
| You Saw What Over Your House? | 1999 | The Dark Gulf of N'kai | | | Self Published | Call of Cthulhu (Classic) | |
| You'll Soon Be Better | | Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) | |
| You'll Soon Be Better | 19-20 | Fantasy Chronicles | 5 | Nov 1986 | Fantastic Publications | Call of Cthulhu (Classic) | |
| Your Name in the Book | 269-300 | Harlem Unbound | CHA23166 | 2020 | Chaosium | Call of Cthulhu (Classic) | New York; 1920s |
| Your Number, Please | | Your Number, Please | | Sep 2025 | Chaosium | Call of Cthulhu (Classic) | August; 1929 |
| Your Passport, please: British Edition | Aug 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: Chinese Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: French Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: Hong Kong Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: Indian Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: Nazi Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: US Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: USSR Edition | Aug 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Your Passport, please: Weimar Republic Edition | Jun 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Yuggoth | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Zangari's Apostasy | 3-13 | Zangari's Apostasy | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) | Boston; 1926; May |
| Zangari's Apostasy | 13-22 | American Empire | | Jan 2025 | Chaosium | Call of Cthulhu (Classic) | Boston; May; 1926 |
| A Zeppelin Travelling the World | | Cthulhu Maps - A Zeppelin Travelling the World | 004 | 2021 | Lovemaps | Call of Cthulhu (Classic) | |
| Zero-G Shoggoth | Sep 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Zombie Deer | Oct 2024 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Zombie Remortification | | RPG Archive | | | Self Published | Call of Cthulhu (Classic) | England; 1920s |
| Zombie Remortification, Part 1 | | Chaosium Digest | v32n12 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Zombie Remortification, Part 2 | | Chaosium Digest | v33n01 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Zombie Remortification, Part 3 | | Chaosium Digest | v33n02 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) | England; 1920s |
| Zombie Variants | | Chaosium Digest | v19n08 | May 1997 | Chaosium | Call of Cthulhu (Classic) | |
| A Zoologist's Addendum | 14-15 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic) | |
| Zorandar | 50-96 | Lands of Mystery | Hero 20 | 1985 | Hero Games | Call of Cthulhu (Classic), Justice Inc, Daredevils, Chill | |
| Zuvembi | Jul 2006 | shoggoth.net | | | Self Published | Call of Cthulhu (Classic) | |
| Zzzzzzzz! | | Goat Mother | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) | |
