| Title | Pages | Publication | Code | Date | Publisher | System (Setting) |
|---|
 100 Artefacts for Modern Settings | |  100 Artefacts for Modern Settings | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Children Ready to Fight Mythos | | 100 Children Ready to Fight Mythos | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Children Ready to Fight Mythos Vol 2 | | 100 Children Ready to Fight Mythos Vol 2 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Modern Mythos Characters | | 100 Modern Mythos Characters | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Modern Mythos Characters Vol 2 | | 100 Modern Mythos Characters Vol 2 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Modern Mythos Characters Vol 3 | | 100 Modern Mythos Characters Vol 3 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Modern Mythos Characters Vol 4 | | 100 Modern Mythos Characters Vol 4 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Modern Mythos Characters Vol 5 | | 100 Modern Mythos Characters Vol 5 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Mythos Adventure Seeds | | 100 Mythos Adventure Seeds | | 2021 | Doppelganger Publishing | Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters | | 100 Pulp Mythos Characters | | 2020 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters Vol 2 | | 100 Pulp Mythos Characters Vol 2 | | 2020 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters Vol 3 | | 100 Pulp Mythos Characters Vol 3 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters Vol 4 | | 100 Pulp Mythos Characters Vol 4 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| 100 Pulp Mythos Characters Vol 5 | | 100 Pulp Mythos Characters Vol 5 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 100 Pulp Mythos Characters Vol 6 | | 100 Pulp Mythos Characters Vol 6 | | 2021 | Doppelganger Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
 100 Things to Find on Someone in the 1980s | 1-3 | 100 Things to Find on Someone in the 1980s | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Now) | |
| 120 NPCs for Modern Day Mythos Scenarios | 3-84 |  The Casting Call of Cthulhu | CHA0345 | 2007 | Chaosium | Call of Cthulhu (Now) | |
| 13 Places of Interest in Brichester | 58-63 |  The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| 1980s NPC Generator | 1-10 | 1980s NPC Generator | | 2021 | Pink Dice Bag Publishing | Call of Cthulhu (Now) | |
 246 Corbitt Street | | 246 Corbitt Street | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | |
| 52 Hz | 4-13 | 52 Hz | | May 2023 | Chaosium | Call of Cthulhu (Now) | Pacific Ocean; 2020s |
| ??? | |  Pink Elephant | 1 | 1987 | Self Published | Call of Cthulhu (Now) | |
 ??? | | Save Our Souls | | 1989 | Self Published | Call of Cthulhu (Now) | |
| ??? | | The Blasphemous Tome | 2 | Feb 2017 | Self Published | Call of Cthulhu (Now) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | |
| ??? | | The Edinburgh Diversions | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | |
| Aberystwyth, Wales | 19 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Abyssus Aquae | 1-20 | Abyssus Aquae | | Jun 2024 | Chaosium | Call of Cthulhu (Now) | Italy; 2023 |
| Aces and Spades | May 2018 |  Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | |
| Adapting a Scenario | 67-78 | Bayt al Azif | 2 | Sep 2019 | Bayt al Azif Inc | Call of Cthulhu (Now) | |
| After Dark | | After Dark | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | Maine; 2020s |
| After the Big One | 118-147 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | California; 1990s; Chthonian; Tcho-Tcho; Mr Shiny |
| The Ages of Man | | The Ages of Man | | 2008 | Self Published | Call of Cthulhu (Now) | Arkham; 1965; 1991; 1941 |
| Akron, OH | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| All For a Good Cause | 5-9 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| All Good Children | 44-52 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Now) | Pennsylvania; 1990s |
| All I Have Left is this Lousy Shield Made Out of a Stop Sign | 25-27 | Protodimension | 18 | Win 2014 | Kinstaff Media | Call of Cthulhu (Now) | |
| Allies and Enemies | 196-214 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Alone Against the Static | | Alone Against the Static | CHA23181 | Dec 2023 | Chaosium | Call of Cthulhu (Now) | South Dakota; 1990s |
| Alone on Obon | | Alone on Obon | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | Japan; 1992; August |
| Alpaca in the Coffee | 4-19 | Alpaca in the Coffee | | Dec 2023 | Chaosium | Call of Cthulhu (Now) | Scotland; 2020s |
| Alpaca in the Coffee | | The Alpaca Trilogy | | Apr 2025 | Chaosium | Call of Cthulhu (Now) | Scotland; 2020s |
| Alpaca in the Sheep Field | | Alpaca in the Sheep Field | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | Scotland; 2020s |
| Alpaca in the Sheep Field | | The Alpaca Trilogy | | Apr 2025 | Chaosium | Call of Cthulhu (Now) | Scotland; 2020s |
| Alpaca on a Plane | | The Alpaca Trilogy | | Apr 2025 | Chaosium | Call of Cthulhu (Now) | Scotland; 2020s |
| Ammunition | 185-190 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Ampney Down | 54-62 | Protodimension | 12 | Spr 2012 | Kinstaff Media | Call of Cthulhu (Now) | England |
| Angular Dreams | 36-48 | The Last Province | 1 | Oct 1992 | Last Province Publishing | Call of Cthulhu (Now) | England; 1990s; Hound of Tindalos |
| Antarctic West | | Antarctic West | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Antarctica; January; 2010 |
| Apartment 71 | 4-16 | Apartment 71 | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Brazil; 2016 |
| Archives of Terror | | Archives of Terror | | Jan 2023 | Chaosium | Call of Cthulhu (Now) | Romania; 1990; December |
| Are All Men Monsters? | | Are All Men Monsters? | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | |
| Arkham 1992 | 29-41 | Devil's Children | PAG1001 | 1993 | Pagan Publishing | Call of Cthulhu (Now) | Arkham; April; 1992 |
| Arkham 1992 | 31-41 | Devil's Children | | 2004 | Pagan Publishing | Call of Cthulhu (Now), Call of Cthulhu (Strange Aeons) [1692] | Arkham; April; 1992 |
| Arkham Fire | 5-21 | Arkham Fire | | Aug 2025 | Chaosium | Call of Cthulhu (Now) | Arkham |
| The Armageddon Plain | 102-110 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Mongolia |
| The Armageddon Plain | 263-270 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Mongolia |
| The Armed Investigator | 4-31 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| The Arrival | 3-11 | Rise of the Dead | CHA0355 | 2008 | Chaosium | Call of Cthulhu (Now) | March; Zombie |
| The Art of Hygge | | The Art of Hygge | | Jul 2023 | Chaosium | Call of Cthulhu (Now) | Denmark; 1999; Winter |
| The Art of Hygge | 25-50 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Denmark; Winter; 1999 |
| As the Stars Fall | | As the Stars Fall | | Jul 2023 | Chaosium | Call of Cthulhu (Now) | |
| At the World's End | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | Vermont |
| An Atlas of the Severn Valley: Berkeley to Clotton | 32-? | Valkyrie | 15 | 1997 | Partizan Press | Call of Cthulhu (Now) | |
| Baba Dochia | 1-7 | Baba Dochia | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Romania; 1992 |
| Background and Rules | 4-16 | Mystic Alliances | CHA0363 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Backstory | 7-9 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | |
| The Bad Place | | The Bad Place | | 2003 | Self Published | Call of Cthulhu (Now) | Maine |
| Baker's Dozen | 26 | Protodimension | 28 | Oct 2016 | Kinstaff Media | Call of Cthulhu (Now) | |
| The Ballad of Bass Rock | 3-12 | The Ballad of Bass Rock | CB6301 | 2012 | Cubicle 7 | Call of Cthulhu (Now) | Scotland; 21st Century AD; Shoggoth |
| Bathory's Children | | Bathory's Children | | May 2019 | Chaosium | Call of Cthulhu (Now) | Germany |
| The Bay of Nouadhibou | 33-35 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| The Beast Between | |  Chaosium Digest | v28n05 | Jun 1999 | Chaosium | Call of Cthulhu (Now) | 1990s |
| The Beast of Yucca Flats | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Behind the Neon Glare | | The Blasphemous Tome | 14 | Feb 2026 | Chaosium | Call of Cthulhu (Now) | England |
| The Benefactor | 44-48 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| The Benefactor | 117-120 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Best Damn Car in the Yard | 51-69 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| Between Heart Beats | 2-19 | Between Heart Beats | | Nov 2023 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark | |
| Beyond the Door | | Cthulhu Modern: Beyond the Door | | Jun 2022 | Chaosium | Call of Cthulhu (Now) | |
| Beyond the Sea | 56-63 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Latvia |
| Beyond the Sea | 217-224 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Latvia |
| Beyond the Silver Threshold | 48-50 | Protodimension | 22 | Win 2015 | Kinstaff Media | Call of Cthulhu (Now) | New England |
| Beyond the Veil of Dreams: Susupti | | Beyond the Veil of Dreams: Susupti | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | Arkham; 1985 |
| The Big Lie | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Binghampton, NY | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Birthright | 28 | Protodimension | 21 | Aut 2014 | Kinstaff Media | Dark Conspiracy, Call of Cthulhu (Now) | Ireland |
| Bitten | Jun 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | Chicago; July; 2012; Atlach-Nacha |
| The Black Lodge | 46-47 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Black Moon Rising | | Chaosium Digest | v10n03 | Apr 1995 | Chaosium | Call of Cthulhu (Now), Nephilim | |
| Black Moon Rising Over Innsmouth | | Chaosium Digest | v11n03 | Jul 1995 | Chaosium | Nephilim, Call of Cthulhu (Now) | Innsmouth |
| Black Static Transmission | 2-20 | Black Static Transmission | | 2004 | Self Published | Call of Cthulhu (Now) | Oceania; 2017 |
| The Black Stone | | Nightwatch | 1 | Nov 1992 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Black Stone | 459-484 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Black Stone | 17-40 | Opifex Bimonthly | 19 | May 1999 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Black String | | The Black String | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | Japan; Summer; 1996 |
| The Black-Eyes Children | 5 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Now) | 2010s |
| The Blackthorns | 10-15 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| Blessed Be | 163-176 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Shub-Niggurath |
| Bloodbath at the Crack of Doom | 188-287 | Beach Blanket Bloodbath | | Apr 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Blue | | The Blasphemous Tome | 7 | Jun 2021 | Self Published | Call of Cthulhu (Now) | |
| The Blue Hive | 31-36 | Serendipity's Circle | 8 | Sum 1996 | Self Published | Don't Look Back, Shattered Dreams, Call of Cthulhu (Now), The Whispering Vault, Bloodshadows | 1996 |
| The Blue Hive | 7-12 | Serendipity's Circle | S2 | 1996 | Self Published | Bloodshadows, Don't Look Back, Shattered Dreams, Call of Cthulhu (Now), The Whispering Vault | 1996 |
| The Bone Dealers | 12-20 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now) | New England; 1990s; Ghoul |
| The Bone Dealers | 73-83 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1990s; Ghoul |
| The Bone Dealers | | The Bone Dealers | | 2001 | Self Published | Call of Cthulhu (Now) | 1990s; Ghoul |
| Bone Deep | 56-61 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Michigan; Ghoul |
| The Book | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | England |
| The Book Club | | The Book Club | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | |
| Book of Bones | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Now) | |
| Book of Bones | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Book of Nonterraqueous | 1-22 | The Book of Nonterraqueous | FXC-19 | 2022 | Stygian Fox | Call of Cthulhu (Now) | Boston |
| The Bookstore | 2-7 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now) | 1990s |
| The Bookstore | 84-90 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1990s |
| The Bookstore | 1-7 | The Bookstore | | 2001 | Self Published | Call of Cthulhu (Now) | 1990s |
| Bounded in a Nutshell | 33-42 | Serendipity's Circle | 5 | Sep 1995 | Self Published | Dark Conspiracy, Don't Look Back, Call of Cthulhu (Now), Over the Edge, Chill, The Whispering Vault | |
| The Box | | The Box | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Brain that Would Not Die | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| The Branchly Numbers Edit | 20-21 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Now) | |
| The Branchly Numbers Edit | 22-23 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| The Bridge Maiden Part 1 | 38-65 |  The Sutra of Pale Leaves: Carcosa Manifest | CHA23189 | Sep 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1987; September; Hastur |
| The Bridge Maiden Part 2 | 110-141 | The Sutra of Pale Leaves: Carcosa Manifest | CHA23189 | Sep 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1988; October; Hastur |
| A Brief Primer | 71-86 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Bright Blue Demon | | The Bright Blue Demon | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | Nevada |
| Bright College Days | 33-36 | Cryptych | 2 | Sep 1993 | ILM International | Call of Cthulhu (Now) | Canada; 1990s; Vampire |
| Bring Me Your Sick | 20-23 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| 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) | |
| British Investigator Templates | 69-78 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Delta Green), Call of Cthulhu (Now) | |
| The British Museum | 44-49 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| The Brockton Butcher | | The Brockton Butcher | | Jul 2021 | Chaosium | Call of Cthulhu (Now) | Canada; 2010; April |
| Broken Arrow: Chernobyl | | Broken Arrow: Chernobyl | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | Ukraine; February; 1992 |
| Broken Glass | | Broken Glass | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Iowa |
| Broken Love | 25-26 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Call of Cthulhu (Now) | |
| The Brunholt Head | 1-9 | The Brunholt Head | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 2000s |
| The Brutal House | 4-20 | The Brutal House | | Apr 2022 | Chaosium | Call of Cthulhu (Now) | England; September; 2021 |
 Building Pland | 6-37 | Counterfeit Identities | SFX3006 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Bunny the Eldritch Slayer | | Bunny the Eldritch Slayer | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | 1990s |
| BURN | | Chaosium Digest | v18n12 | Apr 1997 | Chaosium | Call of Cthulhu (Now) | 1990s |
| BURN | 46-47 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Now) | 1990s |
| BURN | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | 1990s |
| BURN | Feb 1997 | rpg.net | | | Self Published | Call of Cthulhu (Now) | 1990s |
| BURN | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | 1990s |
| Burning Desire | | Burning Desire | | Dec 2023 | Chaosium | Call of Cthulhu (Now) | Arizona |
| Butcher Creek Yellow Page | 12-33 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | |
| By the Pricking of my Thumbs | | By the Pricking of my Thumbs | | May 2021 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Cabin Fever | 3-12 | Cabin Fever | | Aug 2019 | Chaosium | Call of Cthulhu (Now) | Michigan; Winter |
| The Cabinets | | The Cabinets | | Apr 2021 | Chaosium | Call of Cthulhu (Now) | Thailand; 2004 |
| Call of Cthulhu in the Eighties | 8-9 | Different Worlds | 45 | Mar 1987 | Chaosium | Call of Cthulhu (Now) | |
| The Calling of the Blood | 3-15 | The Calling of the Blood | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | Sweden; Spring; 2022 |
| Camp Hollow Lake | | Camp Hollow Lake | | Jul 2023 | Chaosium | Call of Cthulhu (Now) | |
| Camp Kill | | Camp Kill | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | California; 1988 |
| Camp Otter Lake | | Camp Otter Lake | | Feb 2023 | Chaosium | Call of Cthulhu (Now) | |
| Camp Sunny | | Camp Sunny | | 2017 | Chaosium | Call of Cthulhu (Now) | Deep One |
| Campaign Background | 9-50 | The Sutra of Pale Leaves: Twin Suns Rising | CHA23188 | Jun 2025 | Chaosium | Call of Cthulhu (Now) | |
| Campaign Background | 9-37 | The Sutra of Pale Leaves: Carcosa Manifest | CHA23189 | Sep 2025 | Chaosium | Call of Cthulhu (Now) | |
| Campbell Country | 41-57 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | |
| The Campbell Mythos | 11-40 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | |
| Camping in the Shurgas | 1-43 | Camping in the Shurgas | | Jan 2023 | Chaosium | Call of Cthulhu (Now) | Colorado; Serpentman |
| Campus Crusade for Cthulhu | 2-5 | Campus Crusade for Cthulhu | | | Self Published | Call of Cthulhu (Now) | |
| Cans | 1-14 | Cans | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | |
| Caribbean Animal Life | 81-83 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Carousel of Fears | | Carousel of Fears | | Mar 2021 | Chaosium | Call of Cthulhu (Now) | |
| Carribean Campaigns | 63-74 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Case By Case | | Case By Case | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Oregon; October; 1996 |
| The Case for Caseless Ammunition | 39-43 | Protodimension | 5 | Sum 2010 | Kinstaff Media | Call of Cthulhu (Now) | |
| Castaway Island | 1-11 | Castaway Island | | 2005 | Self Published | Call of Cthulhu (Now) | Oceania; Byakhee |
| Castaway Island | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | Oceania; Byakhee |
| Catalogue Nipponica | 117-134 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Ceremony | 18-27 | Live Evil | | 2004 | Self Published | Call of Cthulhu (Now) | Wales; 2002; Halloween |
| The Change | | The Change | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | |
| Change Your Life | | Change Your Life | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | Ohio; 2024 |
| The Chanting | | The Chanting | | Apr 2021 | Chaosium | Call of Cthulhu (Now) | New York; October; 1988 |
| Chaos in Chiapas | | Chaos in Chiapas | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | Mexico |
| 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 (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Chat-DMT | 2-59 | Chat-DMT | | Mar 2024 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark | 2020s |
| The Chiaroscuro Descent | 2-14 | The Chiaroscuro Descent | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | New England |
 Children of the Tides | 6-31 | Children of the Tides | | Feb 2022 | Chaosium | Call of Cthulhu (Now) | |
| A Chill Down Your Spine | 31-44 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Now) | Minnesota; October; 1991 |
| The Chosen One | | Chaosium Digest | v38n06 | Aug 2004 | Chaosium | Call of Cthulhu (Now) | |
| The Church of a Thousand Tomorrows | 5-28 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Church of St Dunstan of the Keys | | The Church of St Dunstan of the Keys | | Apr 2020 | Chaosium | Call of Cthulhu (Now) | |
| Circleville, OH | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| The City in the Sea | 40-53 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | Atlantic Ocean; Gloon |
| The City in the Sea | 40-53 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | Atlantic Ocean; Gloon |
| City of Night | 80-81 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Now) | |
| Clean Up, Aisle Four! | 1-12 | Clean Up, Aisle Four! | | 2004 | Self Published | Call of Cthulhu (Now) | New England |
| A Cleansing Flame | 98-113 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | |
| Clifton Magna, Dorset, UK | 49-55 | Protodimension | 13 | Aut 2012 | Kinstaff Media | Call of Cthulhu (Now) | |
| Closed Casket | 3-11 | Secrets | CHA2367 | 1997 | Chaosium | Call of Cthulhu (Now) | Massachusetts; 1990s; Ghoul |
| Clutching at Ignorance | 2-16 | Clutching at Ignorance | | 2003 | RPGA Network | Call of Cthulhu (Now) | |
| The Cobalt Sky Runner | May 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Los Angeles |
| Code Adam | 4 | The Unspeakable Oath | 23 | Aug 2013 | Pagan Publishing | Call of Cthulhu (Now) | |
| Code of Cthulhu | 5-7 | RPG Review | 18 | Dec 2012 | Self Published | Call of Cthulhu (Now) | |
| The Colchester Expedition | 19-30 | The Saga of Gaukur Trandilsson | | Oct 2023 | Xipe Totec Press | Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark, Delta Green | Scotland; Iceland; 1153 |
| Cold War | 28-45 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Now) | Canada; Lloigor |
| The Colour of Money | | The Colour of Money | | May 2020 | Chaosium | Call of Cthulhu (Now) | England |
| The Committee for Imperial Security | 47-48 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Complex 347-5 | | Complex 347-5 | | Mar 2024 | Chaosium | Call of Cthulhu (Now) | Arkansas; Winter; 1984 |
| Computer Rot | 2003 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Configurations of the Flesh | 18-38 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Now) | Florida; Servitor of the Outer Gods |
| Constant Companion | | Constant Companion | | May 2023 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Strange Aeons) [1970s] | Alaska |
| Contact | | Contact | | Sep 2022 | Chaosium | Call of Cthulhu (Now) | Texas; August; 2020; Mi-Go |
| Contains: One Tibetan God | 91-99 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Contemporary Investigators | 7-11 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | |
| Contemporary Investigators | 7-11 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| Controlled Burn | | Controlled Burn | | Apr 2026 | Chaosium | Call of Cthulhu (Now) | Idaho |
| The Copenhagen Connection | 17-34 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Denmark |
| The Copenhagen Connection | 179-196 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Denmark |
| The Corner of 5th and 15th | 73-76 | Protodimension | 13 | Aut 2012 | Kinstaff Media | Call of Cthulhu (Now) | |
| Crappy Detour | | Crappy Detour | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States; Summer; 1991 |
| Crawling in the Undergrowth | Jun 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | New York State |
| Crazy Block | 74-120 | Toying With Humans | CHA0317 | 2005 | Chaosium | Call of Cthulhu (Now) | 1984; May |
| The Crimson King | | The Grindhouse Volume 1 | | Sep 2021 | Chaosium | Call of Cthulhu (Now) | 1980s |
| The Crimson King | | The Grindhouse: Ultimate Collection | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | 1980s |
| The Cross Inn | 75 | Protodimension | 4 | Spr 2010 | Kinstaff Media | Call of Cthulhu (Now) | |
| Cross My Heart, Hope to Die | 105-123 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Eihort |
| Crossing Guard | | Crossing Guard | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Nevada; June; 2023 |
| Crude Oil | 38-40, 43-46, 49-51 | Shadis | 26 | Apr 1996 | Alderac Entertainment Group | Call of Cthulhu (Now) | Massachusetts; February; 1928; Formless Spawn of Tsathoggua |
| Crude Oil | 27-32, 35-36, 38, 40 | Shadis | 27 | May 1996 | Alderac Entertainment Group | Call of Cthulhu (Now) | Massachusetts; 1990s; Formless Spawn of Tsathoggua |
| Cryptid Investigators Guide | | Cryptid Investigators Guide | | Jan 2025 | Chaosium | Call of Cthulhu (Now) | |
| Cryptography of Cthulhu | 51-53 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Now) | |
| Cthulhu in the 1990s: What's a monster to do? | 43 | Stark, Raving Mad! | | 1991 | Pagan Publishing | Call of Cthulhu (Now) | |
| A Cthulhu Now Character | | Chaosium Digest | v06n04 | Apr 1994 | Chaosium | Call of Cthulhu (Now) | |
| Cthulhu Now! | 11 | White Dwarf | 43 | Jul 1983 | Games Workshop | Call of Cthulhu (Now) | Pacific Ocean |
| Cthulhu Now: Skills and Weapons | 10-11 | White Dwarf | 42 | Jun 1983 | Games Workshop | Call of Cthulhu (Now) | |
| Cthulhu Rising; Cthulhu and the Psychic | 96-98 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Cthulhu Roadshow | | Cthulhu Roadshow | | Feb 2021 | Chaosium | Call of Cthulhu (Now) | New York State; 1981 |
| Cthulhu Sixty Years Later | 10-13 | Space Gamer | 74 | May 1985 | Steve Jackson Games | Aftermath, Hero System, Call of Cthulhu (Now) | |
| Cthulhu Then! Or "This Grey Unpleasant Land" | 36-37 | The Blasphemous Tome | 9 | Jun 2022 | Self Published | Call of Cthulhu (Now) | |
| The Cult of A | 40-51 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Now) | |
| A Cult of One | 31-41 | Secrets | CHA2367 | 1997 | Chaosium | Call of Cthulhu (Now) | Massachusetts; 1990s; Hunting Horror; Byakhee |
| Cults and Secret Societies | 179-195 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Cultural Lexicon | 315-320 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Curs of Chigger-Fang | 15-16 | Stark, Raving Mad! | | 1991 | Pagan Publishing | Call of Cthulhu (Now) | |
| The Curse of Punk | 6-35 | The Curse of Punk | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | California; 1985 |
| Curse of the Bone | 8-15 | White Dwarf | 86 | Feb 1987 | Games Workshop | Call of Cthulhu (Now) | London |
| Cursed | 3-20 | Cursed | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | Massachusetts |
| The Cursed Cabin | 30-37 | Protodimension | 10 | Aut 2011 | Kinstaff Media | Call of Cthulhu (Now) | |
| Curses for Sale | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Daddy's Little Girl: The Uncle Peter Remix | 17-33 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now) | New York State |
| The Damp Man | | The Damp Man | | 1999 | Self Published | Call of Cthulhu (Now) | |
| The Damp Man | | Chaosium Digest | v21n12 | Sep 1997 | Chaosium | Call of Cthulhu (Now) | |
| Dancing to the Wrong Tune | 13-22 | Demonground | 9 | Sum 2000 | Self Published | Call of Cthulhu (Now) | 2000 |
| Daniel "Danny" Foster | | Sidekicks for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Dark and Deep | 59-72 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | Deep One |
| Dark Arts | 38-49 | Counterfeit Identities | SFX3006 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Dark City | 23 Feb 2009 | Talien's Tower | | | Self Published | Call of Cthulhu (Now) | 1920s |
| The Dark Forest | | The Dark Forest | FXC-02 | 2019 | Stygian Fox | Call of Cthulhu (Now) | Michigan |
| Dark Island | 91-124 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Oceania; 1994 |
| Dark Island | 1-34 | Dark Island | | 1999 | Self Published | Call of Cthulhu (Now) | Oceania; 1994 |
| Dark Island | 25-56 | Opifex Bimonthly | 22 | Nov 1999 | Self Published | Call of Cthulhu (Now) | Oceania; 1994 |
| Dark Offerings | | Dark Offerings | | Apr 2019 | Chaosium | Call of Cthulhu (Now) | United Kingdom |
| A Dark Perspective | 71-115 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Dark Side of the Force | 40-43 | Challenge | 62 | Jul 1992 | Games Designers Workshop | Call of Cthulhu (Now) | London; Winter; Great Race of Yith |
| The Dark Side of the Force | 45-51 | Skeleton Crew | | Dec 1990 | Argus Specialist Publications | Call of Cthulhu (Now) | London; 1990s |
| Darkest Calling | 137-150 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | Arizona |
| Darkness in the Lighthouse | 1-16 | The House That Stands Alone | CHA0395 | 2010 | Chaosium | Call of Cthulhu (Now) | Maine |
| The Darkness Over Eaglescar | | The Darkness Over Eaglescar | FXC-10 | 2020 | Stygian Fox | Call of Cthulhu (Now) | England; 1999 |
| A Daughter for the Great God Pan | 16-40 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Now) | |
| Dawn Biozyme | 39-53 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | California; 1990s; Shub-Niggurath |
| De Profundis | 1994 | drelb.free.fr | | | Self Published | Call of Cthulhu (Now) | England; 1995; Y'Golonac |
| Dead Beats | 4-13 | Dead Beats | | Mar 2025 | Chaosium | Call of Cthulhu (Now) | 1984; April |
| Dead Mall | 16-19 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| Dead Man's Dreams | | Dead Man's Dreams | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | New York State |
| Dead Pool | 55 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| The Dead School | 69-78 | Plan 09 From Halloween | CHA0379 | 2009 | Chaosium | Call of Cthulhu (Now) | Massachusetts |
| Deadfellas | | Deadfellas | | Feb 2025 | Chaosium | Call of Cthulhu (Now) | New York State; 1982; Winter |
| The Deadly Claws of the Yellow Emperor | 4-6 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Call of Cthulhu (Now) | |
| Dear Ladies | 5-15 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Now) | England; Halloween |
| Dear Mrs Jones | | The Dollhouse and other adventure ideas | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | England |
| Death and Madness in Porto | 5-51 | Death and Madness in Porto | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | Portugal; 2010 |
| Death Before Burial | May 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Kansas |
| A Death in the Family | | A Death in the Family | | 1992 | Self Published | Call of Cthulhu (Now) | |
| The Decapod of .onion | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Decatur, TN | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Deep Clean | | The Palimpsest Trilogy | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States |
| Deep Commitment | | Serendipity's Circle | 14 | Spr 1998 | Self Published | Call of Cthulhu (Now) | |
| Deep Commitment | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | |
| Demon of Catheway | 125-139 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Demon of Catheway | 1-15 | Demon of Catheway | | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Der Hexenhammer | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | Arkansas; 2000 |
| The Derelict | 41-68 | Petersen's Abominations | CHA23152 | 2017 | Chaosium | Call of Cthulhu (Now) | Atlantic Ocean |
| Desert of Sighs | 47-80 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | Arizona |
| A Desperate Cry | | A Desperate Cry | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | Louisiana |
| Desperate Measures | 4-13 | Desperate Measures | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | Nebraska; September; 2023 |
| Detective Marcus Crowe | | Villains for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| The Devil's Rings Bleaklow, Derbyshire | 14-15 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| The Devil's Triangle | 44-62 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Diablerie | | Diablerie | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | Massachusetts |
| Dial 'H' for Horror | 10 | White Dwarf | 43 | Jul 1983 | Games Workshop | Call of Cthulhu (Now) | United Kingdom |
| The Diary of Homer Simms | Jul 2002 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | Georgia state; 1990s |
| Diaspora | 3-90 | Diaspora | | Jan 2024 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu, Cthulhu Dark | |
| Dicing With Death: Green for Danger | 49-53 | Skeleton Crew | | Mar 1991 | Argus Specialist Publications | Call of Cthulhu (Now) | South America; 1990s |
| Die High | 10-27 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Cthulhu Dark, Call of Cthulhu (Now), Trail of Cthulhu | Chicago; Lesser Race |
| The Dimension Beyond | 49-64 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Dimension Beyond | | The Dimension Beyond | YH-C-7G | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Dinner With Susan | 1-5 | Dinner With Susan | | 2010 | Self Published | Call of Cthulhu (Now) | London |
| The Dionysian | | The Dionysian | | Jul 2025 | Chaosium | Call of Cthulhu (Now) | Washington; 2018 |
| A Dire Warning | 27-28 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| A Dire Warning | 111-112 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| The Disappearance in Montignac | 3-6 | The Disappearance in Montignac | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | France; 2015; October |
| Disconnectia | 47-51 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Now) | |
| The Disgusting Man in the Attic | 4-13 | The Disgusting Man in the Attic | | May 2025 | Chaosium | Call of Cthulhu (Now) | |
| Dissociation | 112-117 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Alaska; Mi-Go |
| Division 13: Guardians of the Unknown | | Division 13: Guardians of the Unknown | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | |
| Division Hexe | 2000 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Do Chatbots Dream of Eldritch Beasts | 4-18 | Do Chatbots Dream of Eldritch Beasts | | Jan 2023 | Chaosium | Call of Cthulhu (Now) | 2020s |
| Do Gods Dream of Digital Drugs? | | Japonism | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Japan |
| Do Not Call Up that Which You Cannot Put Down | 62-67 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Massachusetts |
| Dockside Dogs | 3-10 | Dockside Dogs | PFRL001 | 2012 | Paul Fricker Publication | Call of Cthulhu (Now) | Los Angeles; 1990s |
| Dockside Dogs | | Dockside Dogs | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | Los Angeles; 1990s |
| Dojo Nights | 109-129 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| The Dollhouse | | The Dollhouse and other adventure ideas | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | Canada |
| Doomhunt | | Four Letters At Random | | | Self Published | Call of Cthulhu (Now) | |
| DotDotAsh | 2-25 | DotDotAsh | | Apr 2024 | Xipe Totec Press | Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark, Delta Green | |
| Double Dare | 33-42 | Bayt al Azif | 1 | Oct 2018 | Bayt al Azif Inc | Call of Cthulhu (Now) | 2010s; Halloween |
| Down New England Town | 8-14 | Opifex Bimonthly | 7 | May 1997 | Self Published | Call of Cthulhu (Now) | New England; 1990s; Ghoul |
| Down to New England Town | 1-4 | Down To New England Town | | 1997 | Self Published | Call of Cthulhu (Now) | New England; 1990s; Ghoul |
| Downtown | 28-44 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Dr Evelyn Thornfield | | Sidekicks for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Dr Leonard Blackwood | | Sidekicks for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Dr Nathaniel Hargrave | | Villains for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Dr Richard Laymon | 77 | The Last Province | 3 | 1993 | Last Province Publishing | Call of Cthulhu (Now) | |
| Dr Victor Thornfield | | Villains for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Draw the Blinds on Yesterday | 26-33 | White Dwarf | 63 | Mar 1985 | Games Workshop | Call of Cthulhu (Now) | England; Dimensional Shambler |
| Dread Designs | | Dread Designs | | Mar 2025 | Chaosium | Call of Cthulhu (Now) | Oregon; 2010s |
| The Dread From Geneva Lake | 3-27 | The Dread From Geneva Lake | | Mar 2022 | Gaxx Worx | Call of Cthulhu (Now) | Wisconsin; 2022; March |
| The Dread From Geneva Lake 2 | | The Dread From Geneva Lake 2 | | 2024 | Gaxx Worx | Call of Cthulhu (Now) | Wisconsin; 2022 |
| DreadCon | | DreadCon | | Aug 2019 | Chaosium | Call of Cthulhu (Now) | Boston; August |
| Dream Eater | 51-90 | The Sutra of Pale Leaves: Twin Suns Rising | CHA23188 | Jun 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1986; July; Hastur |
| A Dream of Japan | 2-28 | Age of Cthulhu Vol. VI: A Dream of Japan | 7006 | 2012 | Goodman Games | Call of Cthulhu (Now) | Japan; Arkham; 1926 |
| Dreamers of the Bogland | 3-10 | Dreamers of the Bogland | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | Finland |
| Dreamers of the Bogland | 71-82 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Finland |
| Dreaming Doom | Apr 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | New York; Great Race of Yith |
| Dreams Dark and Deadly | 54-82 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | Colorado; Cthulhu |
| Dreams Dark and Deadly | 54-82 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | Colorado; Cthulhu |
| Dreams to Fill the Vacuum | 4-9 | Dreams to Fill the Vacuum | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | Michigan; 1995 |
| Dreamtime | | Dreamtime | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | |
| The Drop | | The Drop | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | Summer |
| Dropped Call | Nov 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | New York State |
| Drug War | Sep 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Central America; 1983; Abhoth |
| The Drum Circle | 34-60 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now) | Colorado; August |
| The Durian Hotel | | The Durian Hotel | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | Philippines; December; 1995 |
| East Stroudsberg, PA | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| East-Town | 45-50 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Easter of Iscariot | | Easter of Iscariot | | Apr 2026 | Chaosium | Call of Cthulhu (Now) | United States; Great Race of Yith |
| Echoes in the Deep | Oct 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Atlantic Ocean; Glaaki |
| Eclipse of the Heart | 3-11 | Eclipse of the Heart | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | Maine; 1985; May |
| Educement | | The Blasphemous Tome | 10 | Nov 2022 | Self Published | Call of Cthulhu (Now) | |
| The Effects of William Perkins | Mar 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Shoggoth |
| Eight Tainted Eggnogs | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December; 21st Century AD; Mi-Go |
| Ek'Be: The Black Road | 3-24 | A Resection of Time | CHA2364 | 1997 | Chaosium | Call of Cthulhu (Now) | San Francisco; Arkham; Los Angeles; April; 1997 |
| Ek'Way: The Black Portal | 25-45 | A Resection of Time | CHA2364 | 1997 | Chaosium | Call of Cthulhu (Now) | Belize; 1997 |
| The Elderly Man | Oct 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| An Eldritch Thing Happened on the Way to the Forum | | An Eldritch Thing Happened on the Way to the Forum | | 2008 | Self Published | Call of Cthulhu (Now) | England; 2008; Mi-Go |
| Eleanor "Red" Sullivan | | Villains for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Emily Walker | | Sidekicks for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Emily White | | Sidekicks for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Endless Spinning | 2-14 | Endless Spinning | | Dec 2023 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Engines Underground | 16-17 | The Unspeakable Oath | 21 | Jul 2012 | Pagan Publishing | Call of Cthulhu (Now) | |
| Engines Underground | 226-227 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| Enter the Gaijin | 108-116 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Now) | Arkham; Halloween |
| Ephemera | 79-102 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| Ephemera | 70-92 | Counterfeit Identities | SFX3006 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Ephraim, UT | 16 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Epic | | Epic | | 2002 | Self Published | Call of Cthulhu (Now) | England; 2000s |
| Evelyn O'Sullivan | | Villains for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Every Mother's Nightmare | 52-53 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Now) | Nebraska; 1990s |
| Everyday People: Playing Yourself in Cthulhu Now | | Chaosium Digest | v06n03 | Apr 1994 | Chaosium | Call of Cthulhu (Now) | |
| The Evil Stars | 107-124 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | Florida; Hastur |
| The Evil Stars | 107-124 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | Florida; Hastur |
| The Excursion | | The Excursion | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | Norway; October; 1999 |
| The Excursion | 51-70 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Norway; 1999; October |
| Executive Retreat | 52 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | United Kingdom |
| The Exhibit | 163-184 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1996 |
| The Exhibit | 1-22 | The Exhibit | | 1999 | Self Published | Call of Cthulhu (Now) | 1996 |
| The Exhibit | 22-38 | Opifex Bimonthly | 6 | Mar 1997 | Self Published | Call of Cthulhu (Now) | 1996 |
| The Exhibition of Dread | 1-21 | The Exhibition of Dread | | Mar 2024 | Chaosium | Call of Cthulhu (Now) | Boston; Winter; 2023 |
| An Expectant Terror | Feb 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Scotland; 2017; September |
| Explosives | 202-206 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Extended Campaign Notes | 43-46 | Mystic Alliances | CHA0363 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Extrasensory Perception in Call of Cthulhu | 1998 | Bristol Consortium | | | Self Published | Call of Cthulhu (Now) | |
| Eye of the Beholder | 25-40 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | |
| Eye of the Storm | 29-42 | The Dreaming Prince | CHA0399 | 2011 | Chaosium | Call of Cthulhu (Now) | New York State |
| Eyes that Should Not See | 5-16 | Halloween Horror | CHA0326 | 2005 | Chaosium | Call of Cthulhu (Now) | Massachusetts; 2000; Halloween |
| The Facility | 41-120 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | 2023 |
| The Faith Healer | 33 | Protodimension | 2 | Aut 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| Faithful for No Good Reason | 4-19 | Lost in the Lights | 60-NUK01 | 2013 | Sixtystone Press | Call of Cthulhu (Now) | |
| Faithful for No Good Reason | 4-19 | Lost in the Lights | 60-NUK01-01 | 2017 | Sixtystone Press | Call of Cthulhu (Now) | |
| The Fall | 38-40 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | 2023 |
| Fall Out | | The Blasphemous Tome | 4.5 | Jun 2019 | Self Published | Call of Cthulhu (Now) | |
| False Mythologies | 55-70 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now), Call of Cthulhu (Delta Green) | |
| A Family Affair | 60-80 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | Georgia state |
| A Family Affair | 131-150 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Georgia state |
| Fanfic | 91-144 | The Sutra of Pale Leaves: Twin Suns Rising | CHA23188 | Jun 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1986; December; Hastur |
| Father Michael O'Connor | | Sidekicks for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| A Father's Pride | | A Father's Pride | | 2003 | Self Published | Call of Cthulhu (Now) | |
| Festival of Terror | | Festival of Terror | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | Scotland; 2023; August |
| Field of Dreams | Jul 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Alaska; 2000s; Mi-Go |
| Fiends on Film | Dec 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Final Cut | 113-125 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | Pennsylvania |
| Firearms | 15-24 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | |
| Firearms | 15-24 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| Firearms of the UK and Irish Police and Military | 58-64 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| Fires in California | Jul 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | California; 2018 |
| Five Forbidden Tomes! | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December |
| The Fixer | 142-185 | The Sutra of Pale Leaves: Carcosa Manifest | CHA23189 | Sep 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1990; November; Hastur |
| Flesh For Eihort | 1-14 | Flesh For Eihort | | 2005 | Unbound Publishing | Call of Cthulhu (Now) | England |
| Flesh for Eihort | 47-58 | Demonground | 12 | Jun 2001 | Self Published | Call of Cthulhu (Now) | England |
| Flight 714 | 33-43 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Flightscare | Mar 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Focus Group | 108-111 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Fogbound | | Fogbound | | May 2020 | Isolation Games | Call of Cthulhu (Now) | England |
| Food Service | 4-28 | Food Service | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | Arkham |
| For King and Country | | For King and Country | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | Dreamlands |
| The Forbidden Beat | | The Forbidden Beat | | Dec 2020 | Chaosium | Call of Cthulhu (Now) | London; 2000s |
| Foreign Policy | 2-10 | Foreign Policy | | 1994 | RPGA Network | Call of Cthulhu (Now) | Sri Lanka |
| Forensic Pathology | 25-32, 128 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | |
| Forensic Pathology | 25-32, 128 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| The Forest | | The Forest | | Apr 2023 | Chaosium | Call of Cthulhu (Now) | Germany |
| Forget Me Not | 32-56 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | Michigan; Eihort |
| Forget Me Not | 24-37 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| The Forgotten | | Creatures for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Forgotten Pyramid | 30-52 | The House That Stands Alone | CHA0395 | 2010 | Chaosium | Call of Cthulhu (Now) | Egypt; Nyarlathotep; Ghoul |
| The Found Phone | 28 | The Unspeakable Oath | 22 | Jan 2013 | Pagan Publishing | Call of Cthulhu (Now) | |
| Four Corners | Nov 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | New Mexico |
| The Fractal | | Chaosium Digest | v17n12 | Jan 1997 | Chaosium | Call of Cthulhu (Now) | Alternate Dimension; 1990s |
| Fractal Gods | 71-83 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | Boston |
| Fractal Gods | 82-95 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | Boston |
| Freddy's Final Victory! | 45-? | Gateways | v2n9 | Jun 1988 | Gateways Publications | Call of Cthulhu (Now), Beyond the Supernatural | |
| French Hill | 104-110 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Freshly Turned Earth | 2-27 | Freshly Turned Earth | | Dec 2023 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | England; June |
| Friends of Dorothy | | Friends of Dorothy | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | June; 1981 |
| Frozen Footprints | 41-58 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | Michigan |
| Fuel of the Gods | 48-61 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Now) | 1990s |
| Full Wilderness | 9-29 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | California; 1990s; Dark Young of Shub-Niggurath |
| Fungus | 185-198 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Oceania; 1990s; Non-Mythos |
| Fungus | 1-14 | Fungus | | 1997 | Self Published | Call of Cthulhu (Now) | Oceania; 1990s; Non-Mythos |
| Fungus | 22-36 | Opifex Bimonthly | 11 | Jan 1998 | Self Published | Call of Cthulhu (Now) | Oceania; 1990s; Non-Mythos |
| Fungus | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Gadgets and Gear | 191-201 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Galilee Springs | | Galilee Springs | | Sep 2019 | Chaosium | Call of Cthulhu (Now) | 1970s |
| The Game is Rigged | 3-11 | The Game is Rigged | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | Atlantic Ocean; 2010 |
| Game Night | | Game Night | | Jan 2023 | Chaosium | Call of Cthulhu (Now) | December |
| Game Over - For Good! | Jun 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Gates of Delerium | 84-98 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | New York |
| The Gates of Delerium | 96-111 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | New York |
| Gathering Darkness, Part 1 | | Chaosium Digest | v25n04 | Apr 1998 | Chaosium | Call of Cthulhu (Now) | |
| Gathering Darkness, Part 2 | | Chaosium Digest | v25n05 | Apr 1998 | Chaosium | Call of Cthulhu (Now) | |
| The Gaudy | 19-27 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | December |
| Generating a Parapsycologist Character | 20-22 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| The Gerrnaine Institute | 60-71 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Now) | |
| Ghatanothoa: The Forgotten One | | Ghatanothoa: The Forgotten One | | Mar 2024 | Chaosium | Call of Cthulhu (Now) | Ghatanothoa |
| The Ghost and the Machine | 7-16 | Serendipity's Circle | 1 | Jan 1995 | Self Published | Call of Cthulhu (Now), Dark Conspiracy | 1990s |
| Ghost Mail | 60-62 | Book of Dark Wisdom | 1 | Sum 2003 | Elder Sign Press | Call of Cthulhu (Now) | |
| Ghosts and Hauntings | 26-32 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| Ghosts of Ravenscar | 128-133 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | England |
| Ghosts: A Keepers Guide | 72-75 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Ghouls at Midnight | 52 | Protodimension | 19 | Spr 2014 | Kinstaff Media | Call of Cthulhu (Now) | |
| Gilman House | | Gilman House | | 2003 | Self Published | Call of Cthulhu (Now) | Arkham; 1990s |
| The Glendale Faries | 23-54 | Strange Tales of Dread & Wonder #2 | CHA0330 | 2006 | Chaosium | Call of Cthulhu (Now) | England; 2001 |
| Gloomy Sunday | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The God Of Prosthetics | 2-37 | The God Of Prosthetics | | Nov 2023 | Xipe Totec Press | Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu, Cthulhu Dark, Delta Green | |
| God's Tears | 4-10 | God's Tears | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Nebraska; Autumn; 2023 |
| Goddess | 199-210 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | North America; 1990s; Shub-Niggurath |
| Goddess | 1-12 | Goddess | | 1992 | Self Published | Call of Cthulhu (Now) | North America; 1990s; Shub-Niggurath |
| Goddess | 12-20 | Opifex Bimonthly | 4 | 1996 | Self Published | Call of Cthulhu (Now) | North America; 1990s; Shub-Niggurath |
| The Golden Chalice | 29-45 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Gone Fishing | Jul 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | California; Autumn; 2017 |
| Good Intentions | 2008 | The Fairfield Project | | | Self Published | Call of Cthulhu (Now) | |
| Good Vibes Only | | Good Vibes Only | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | |
| Gothic | 70-89 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Star Vampire |
| Gotta Die of Something, Kid | 130-135 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| Government Intelligence Section 19 | 50-51 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Grace Tanner | | Sidekicks for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Grace Under Pressure | 3-20 | Grace Under Pressure | PAG2100 | 1993 | Pagan Publishing | Call of Cthulhu (Now) | Pacific Ocean; March; 1996; Deep One |
| Grace Under Pressure | 22-40 | The Unspeakable Oath | 2 | May 1991 | Pagan Publishing | Call of Cthulhu (Now) | Pacific Ocean; March; 1996; Deep One |
| Grace Under Pressure | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Now) | Pacific Ocean; March; 1996; Deep One |
| Granny's Tales | 24-25 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| Gravesport University | Dec 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Washington |
| The Great American Dynasty | | The Great American Dynasty | | Sep 2023 | Chaosium | Call of Cthulhu (Now) | |
| The Great and Terrible Awto | 40-44 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| The Great Healer | | The Great Healer | | Jul 2021 | Chaosium | Call of Cthulhu (Now) | Boston; March; 2018 |
| The Great Shave Mystery | 17 | Serendipity's Circle | 1 | Jan 1995 | Self Published | Call of Cthulhu (Now), Dark Conspiracy | |
| The Great Shave Mystery | 16 | Serendipity's Circle | S1 | 1995 | Self Published | Call of Cthulhu (Now), Dark Conspiracy | |
| Green Box | 79 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| The Green Chapel | | The Green Chapel | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | Germany |
| Grenade Launchers | 177-180 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Grotesque | | Grotesque | | Sep 2024 | Dark of the Night Network | Call of Cthulhu (Now) | Michigan; 1980s |
| The Gruen Transfer | | The Gruen Transfer | | Jul 2018 | Chaosium | Call of Cthulhu (Now) | |
| Guardians of Easter Island | | Guardians of Easter Island | | Dec 2019 | Chaosium | Call of Cthulhu (Now) | Oceania |
| The Gunther Documents | | Chaosium Digest | v26n11 | Nov 1998 | Chaosium | Call of Cthulhu (Now) | New York |
| Hail to the King | | Hail to the King | | May 2020 | Chaosium | Call of Cthulhu (Now) | Hastur |
| Hallowanigans | 4-5 | Protodimension | 28 | Oct 2016 | Kinstaff Media | Call of Cthulhu (Now) | Halloween |
| Halloween Candy | 89-107 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Now) | Halloween; Y'Golonac |
| Halloween in the Time of Covid-19 | Oct 2020 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | Halloween |
| The Hammer | 46-57 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Handguns | 54-92 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Hands of the Living God | 34-43 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Now) | Arkham |
| The Happiness Hut | | The Happiness Hut | | Mar 2023 | Chaosium | Call of Cthulhu (Now) | |
| Harrisberg, PA | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Hastings, East Sussex | 18 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Haunted Clubhouse | 3-13 | The Haunted Clubhouse | | 2017 | Trepan | Call of Cthulhu (Now) | New Hampshire |
| The Haunted Heart | 17-38 | Protodimension | 16 | Sum 2013 | Kinstaff Media | Call of Cthulhu (Now), Dark Conspiracy | |
| Haunted Molesbury | 39-55 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Now) | England; Halloween |
| Havana, Cuba | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Haze | | Haze | | Sep 2021 | Chaosium | Call of Cthulhu (Now) | Georgia state; June; 2010 |
| A Heady Draught | | A Heady Draught | | May 2023 | Chaosium | Call of Cthulhu (Now) | England |
| The Heavenly Host | | The Heavenly Host | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Missouri; December |
| Heinrich Mueller | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Hell in Texas | 85-99 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | Texas |
| Hell in Texas | 49-56 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| Hellish Engine | 52-73 | The House That Stands Alone | CHA0395 | 2010 | Chaosium | Call of Cthulhu (Now) | Pennsylvania |
| Hello From Japan | | Hypergraphia | 2 | Aug 2019 | Gladius Games | Call of Cthulhu (Now) | |
| Hellraiser | 1-10 | Hellraiser | | 2002 | Self Published | Call of Cthulhu (Now) | |
| Henry Darger's Second Novel | 43-45 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Now) | |
| Henry Darger's Second Novel | 125-127 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| The Hero Affirmed | | The Blasphemous Tome | 4 | Dec 2018 | Self Published | Call of Cthulhu (Now) | |
| The Hero's Bastard | | The Hero's Bastard | RIP031 | 2009 | Rite Publishing | Call of Cthulhu (Now) | Fantasy World |
| The Hidden People | 4-30 | The Hidden People | | Sep 2023 | Chaosium | Call of Cthulhu (Now) | Iceland; Autumn; 2010 |
| The Hidden People | 83-102 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Iceland; Autumn; 2010 |
| High Tide, Full Moon | 32-39 | Children of the Tides | | Feb 2022 | Chaosium | Call of Cthulhu (Now) | Florida |
| The Hin-no-Maru Slayings | 263-270 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | Japan; 2002; Summer |
| Hit and Run | 68-72 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Hit Locations | 33-38 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | |
| Hit Locations | 33-38 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| The Hitchhiker | Oct 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Kansas; May; 1983; Mi-Go |
| Hitchhiker | 4-12 | Hitchhiker | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | Antarctica; June; 2008 |
| The Hole in the Attic | 56-58 | The Ghosts in the House | CHA0396 | 2010 | Chaosium | Call of Cthulhu (Now) | Wisconsin |
| Holy Abominable | 2-41 | Holy Abominable | | Oct 2023 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu | |
| The Hoodlums | | The Grindhouse: Ultimate Collection | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Massachusetts; Summer; 1983 |
| Horror at El Dorado Royale | 4-18 | Horror at El Dorado Royale | | Jun 2023 | New Comet Games | Call of Cthulhu (Now) | |
| Horror at the Westmore Motel | | Horror at the Westmore Motel | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | Massachusetts; 1983; Mi-Go |
| The Horror of Morinrood | | The Horror of Morinrood | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | Irish Sea |
| Hot Bro Summer | | Hot Bro Summer | | Sep 2025 | Chaosium | Call of Cthulhu (Now) | June; 2010 |
| Hotel Hell | 7-40 | Petersen's Abominations | CHA23152 | 2017 | Chaosium | Call of Cthulhu (Now) | Canada |
| A House Full of Ghosts | 53-55 | The Ghosts in the House | CHA0396 | 2010 | Chaosium | Call of Cthulhu (Now) | Wisconsin |
| House of Shadows | 13-46 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | |
| House on an Island | 1-22 | House on an Island | | 1996 | Self Published | Call of Cthulhu (Now) | Maine |
| House on an Island | 37-58 | Opifex Bimonthly | 11 | Jan 1998 | Self Published | Call of Cthulhu (Now) | Maine |
| The House on the Island | 211-232 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The House That Jack Built | 12-15 | Imazine | 16 | 1987 | Self Published | Call of Cthulhu (Now) | |
| The House that Stands Alone | 73-99 | The House That Stands Alone | CHA0395 | 2010 | Chaosium | Call of Cthulhu (Now) | Maine; Ghoul |
| The Howling From Beyond | Dec 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Colorado; Winter; 1994; Ithaqua |
| The Hum | 515-529 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | New Mexico; 1990s |
| The Hum | 1-15 | The Hum | | 1998 | Self Published | Call of Cthulhu (Now) | New Mexico; 1990s |
| The Hum | 16-31 | Opifex Bimonthly | 17 | Jan 1999 | Self Published | Call of Cthulhu (Now) | New Mexico; 1990s |
| Hungary in Other Eras | 53-58 | Mysteries of Hungary | CHA0340 | 2007 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Hunger at the Campsite | 1-2 | Hunger at the Campsite | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | 1982 |
| The Hunting Falls Clinic | 57-70 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| I Can't Stand It | 34-50 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| I Did What the Virgin Asked | 153- | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | Arkham |
| I Want to Play | | I Want to Play | FXC-07 | 2019 | Stygian Fox | Call of Cthulhu (Now) | England |
| I Want You to Kill the Ice Cream Man | 233-240 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Summer; 1990s |
| I Want You to Kill the Ice Cream Man | 1-8 | I Want You to Kill the Ice Cream Man | | 2000 | Self Published | Call of Cthulhu (Now) | Summer; 1990s |
| I Want You to Kill the Ice Cream Man | 7-15 | Opifex Bimonthly | 17 | Jan 1999 | Self Published | Call of Cthulhu (Now) | Summer; 1990s |
| I Want You to Kill the Ice Cream Man | | Chaosium Digest | v26n04 | Jul 1998 | Chaosium | Call of Cthulhu (Now) | Summer; 1990s |
| Ice Caves of Mt Fuji | | Ice Caves of Mt Fuji | | Apr 2025 | New Comet Games | Call of Cthulhu (Now) | Japan |
| Ice Cream Man | | Ice Cream Man | | May 2019 | Chaosium | Call of Cthulhu (Now) | 1990s; Summer |
| The IDEAL Conceal | 23 | The Dark Times | 1 | Aut 2017 | Self Published | Call of Cthulhu (Now), Dark Conspiracy | |
| An Ideal Society | | An Ideal Society | | 2006 | Self Published | Call of Cthulhu (Now) | |
| In Dark and Lonely Waters | 5-35 | In Dark and Lonely Waters | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | England; October; 1986 |
| In Darkness We Wait | | In Darkness We Wait | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | California; Mi-Go |
| In Media Res | 56-63 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Now) | Missouri; 1993; Summer |
| In Media Res Live Action Roleplaying Report | 25 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Now) | |
| In the House of Glass | 53-72 | Bayt al Azif | 3 | Nov 2020 | Bayt al Azif Inc | Call of Cthulhu (Now) | |
| In Xanthic Terms | | In Xanthic Terms | | Oct 2023 | Chaosium | Call of Cthulhu (Now) | London |
| Incommers | 2-18 | Incommers | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Incommers | 110-125 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| The Incredible Dr Quinn | | The Incredible Dr Quinn | | Jan 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Incriminating Letter | 1-10 | The Incriminating Letter | | 2003 | Self Published | Call of Cthulhu (Now) | |
| The Incriminating Letter | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | |
| Indianapolis, IN | 7 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| INDIGO: Advancement Points | 3-8 | INDIGO: Advancement Points | | May 2024 | Chaosium | Call of Cthulhu (Now) | |
| Indigo: After the End of the World | | Indigo: After the End of the World | | Feb 2018 | Chaosium | Call of Cthulhu (Now) | |
| Inferno | 1-32 | Whispers in the Dark | 0003 | Oct 1993 | Triad Entertainments | Call of Cthulhu (Now) | |
| Infest | 1-4 | Game Trade Magazine | 26 | Apr 2002 | Alliance Game Distributors | Call of Cthulhu (Now) | |
| Inhabitants of the Realms | 216-262 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Inhuman Trafficking | 2-31 | Inhuman Trafficking | | Sep 2023 | Xipe Totec Press | Call of Cthulhu (Now), Cthulhu Obscura, Trail of Cthulhu, Cthulhu Dark, Delta Green | |
| The Inked | | Creatures for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Innsmouth 2000 | 101-105 | Ye Booke of Tentacles | 3 | 2000 | The Chaos Society | Call of Cthulhu (Now) | |
| Insert Coin for Credit | 70-90 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| Inside Out | 49 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Now) | |
| Institutions, Organizations and Power Groups in Japan | 166-178 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Insured Misery | 39-48 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| Insured Misery | | Insured Misery | YH-C-7F | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Intersections | 2-21 | Intersections | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Intersections | 68-92 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Intimate Encounters | 122-135 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | |
| Intimate Encounters | 73-78 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| Into the East | 73-82 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Russia |
| Into the East | 234-244 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Russia |
| Introduction | 25-33 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Introduction | 4-34 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Introduction | 4-11 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Intruder Beyond Time | Feb 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Oceania |
| Inversion | 130-134 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | 2023 |
| Investigating Postergeists | 33-40 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Investigator Templates | 76-81, 45 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Invisible Sun | 20-67 | Lost in the Lights | 60-NUK01 | 2013 | Sixtystone Press | Call of Cthulhu (Now) | Nevada |
| Invisible Sun | 20-67 | Lost in the Lights | 60-NUK01-01 | 2017 | Sixtystone Press | Call of Cthulhu (Now) | Nevada |
| Invitation to Play | 9-19 | Serendipity's Circle | 6 | Win 1995 | Self Published | Nephilim, The Whispering Vault, Call of Cthulhu (Now), Immortal: The Invisible War | 1996 |
| Invitation to the Dance | 16-23 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Now) | Vermont |
| Irrational Express | | Irrational Express | | 2003 | Self Published | Call of Cthulhu (Now) | England |
| The Island Paradises | 11-43 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| It Opens Doors | Nov 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | |
| It's Not What it Seems... | 4-12 | It's Not What it Seems... | | May 2025 | Chaosium | Call of Cthulhu (Now) | England; Spring; 1998 |
| Japan - Empire of Shadows Keeper Map Pack #1 Tokyo | | Japan - Empire of Shadows Keeper Map Pack #1 Tokyo | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | |
| Japan Background Notes | | Chaosium Digest | v06n01 | Mar 1994 | Chaosium | Call of Cthulhu (Now) | |
| A Japanese Grimoire | 135-143 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Jeremiah "The Puppeteer" Grimes | | Villains for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| The Jersey Shore, NJ | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Jim Turner | | Sidekicks for Modern Horror - Book 6 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Jingle Hell | | Jingle Hell | | Dec 2024 | Chaosium | Call of Cthulhu (Now) | |
| Jolene | | Jolene | | Apr 2023 | Chaosium | Call of Cthulhu (Now) | California; 2019; September |
| Journey to Paradise | 1-3 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Joy Shusterman's Basement | 28-30 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Now) | |
| Joy Shusterman's Basement | 110-112 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| Jubai Kaidan | 78-87 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Now) | Japan; Halloween |
| Judge, Jury, and | 2-40 | Judge, Jury, and | | Jan 2024 | Xipe Totec Press | Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now) | |
| Just Nowhere | 29-39 | Protodimension | 21 | Aut 2014 | Kinstaff Media | Call of Cthulhu (Now) | Ghoul; Serpentman |
| Kaidan. Great Service | | Kaidan. Great Service | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1980s |
| Kalamazoo, MI | 8-9 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Kane's Tone | 4-16 | Kane's Tone | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | California; 2010s |
| Kansas City, MO | 12-13 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Keeper Information | 10-15 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | |
| Keeper of the Woods | 1-15 | Keeper of the Woods | | 2007 | Self Published | Call of Cthulhu (Now) | Maine |
| Kewaunee, WI | 10 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Killer Out of Space | 83-106 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | Kansas; Colour Out of Space |
| The Killer Out of Space | 83-106 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | Kansas; Colour Out of Space |
| Kimmy Neuheisel and her Special Friend | 5-8 | Protodimension | 9 | Sum 2011 | Kinstaff Media | Call of Cthulhu (Now) | |
| King | 87-102 | Cthulhu Britannica | CB7350 | 2009 | Cubicle 7 | Call of Cthulhu (Now) | England; 1990s; Tcho-Tcho |
| A King Arisen | Nov 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Egypt; January; 2011 |
| A King is Borne | 3-14 | A King is Borne | | Jun 2019 | Chaosium | Call of Cthulhu (Now) | Arkham; 2014; December |
| Kingston, Ontario | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Kirkwood Farnhouse Massacre | | The Kirkwood Farmhouse Massacre | | Jan 2018 | Chaosium | Call of Cthulhu (Now) | Iowa |
| The Knife | 7-11 | Opifex Bimonthly | 1 | 1996 | Self Published | Call of Cthulhu (Now) | 1990s |
| The Knife | 530-536 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1990s |
| The Knife | 1-7 | The Knife | | 1998 | Self Published | Call of Cthulhu (Now) | 1990s |
| The Knife | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | 1990s |
| The Knife | 3-5 | The Knife | | Mar 2018 | Chaosium | Call of Cthulhu (Now) | 1990s |
| The Knights Templar | 24-35 | The Unspeakable Oath | 14/15 | 1997 | Pagan Publishing | Call of Cthulhu (Now) | |
| The Labyrinth | 28-38 | Live Evil | | 2004 | Self Published | Call of Cthulhu (Now) | Wales; Halloween; 2002 |
| Ladybug, Ladybug, Fly Away Home | 7-31 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | |
| Ladybug, Ladybug, Fly Away Home | 6-23 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| A Landscape of Barrows and Stones | 42-51 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Delta Green), Call of Cthulhu (Now) | |
| Landscrapes | 29-39 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | California; 1990s |
| Landscrapes | 29-39 | Dagon | 18,19 | Jul 1987 | Self Published | Call of Cthulhu (Now) | California; 1990s |
| Last Christmas | | Last Christmas | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | 1984; December |
| The Last Customer | | The Palimpsest Trilogy | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States |
| Last Dance in Shoreditch | 6-20 | Last Dance in Shoreditch | | Apr 2026 | Chaosium | Call of Cthulhu (Now) | London |
| The Last Dance of Lola Montez | | The Last Dance of Lola Montez | | Mar 2024 | Chaosium | Call of Cthulhu (Now) | Australia; May |
| The Last Gasp | 58-61 | The Ghosts in the House | CHA0396 | 2010 | Chaosium | Call of Cthulhu (Now) | Wisconsin |
| The Last Glimpse of Hope | 66-113 | Dark Visions From Beyond | 0 | Nov 2023 | Chaosium | Call of Cthulhu (Now) | |
| The Last Hope | | The Last Hope | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | United States |
| Late Night Out | Nov 2010 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | Arkham |
| Legacy of the Weird Hill | 3-17 | Legacy of the Weird Hill | | Jun 2024 | Chaosium | Call of Cthulhu (Now) | Finland; 2020; February |
| Legs | | Legs | | 2013 | Chaosium | Call of Cthulhu (Now) | Chicago |
| Legs | | Legs | | May 2018 | Chaosium | Call of Cthulhu (Now) | Chicago |
| Leporidae | | The Dollhouse and other adventure ideas | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | Spring |
| Leroy | | Leroy | | Dec 2023 | Chaosium | Call of Cthulhu (Now) | Montana |
| Levana and Our Ladies of Sorrow | 132-133 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | |
| Light and Shadow | 157-165 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Light in Their Eyes | 2-69 | The Light in Their Eyes | | Nov 2024 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu, Cthulhu Dark | California |
| Lights Out | 50-55 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Cthugha |
| Lights, Camera... Malefaction | | Lights, Camera... Malefaction | YH-C-7A | Apr 2025 | Chaosium | Call of Cthulhu (Now) | New York State; 2020s |
| Lily Marsh | | Sidekicks for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Linda Carter | | Sidekicks for Modern Horror - Book 6 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Little Torches | 4-34 | Little Torches | | Jan 2020 | Chaosium | Call of Cthulhu (Now) | California; 1994 |
| Liveathan | 34-42 | Protodimension | 4 | Spr 2010 | Kinstaff Media | Call of Cthulhu (Now) | |
| Liverpool, Merseyside | 20-21 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Lock, Stock and Two Smoking Barrels | 16-18 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| The Lock-in | 22-36 | Dead Leaves Fall | CHA0406 | 2011 | Chaosium | Call of Cthulhu (Now) | Arkham; Y'Golonac |
| Lock-in: Five in a Bunker | | Lock-in: Five in a Bunker | | Apr 2020 | Chaosium | Call of Cthulhu (Now) | Arizona; 1968 |
| Locust Valley, NY | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Lonely Hearts (Taste Great) | 132-137 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | Arkham |
| The Lonely Rest Stop | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | Ghoul |
| Long Night's Moon | | Long Night's Moon | | Jul 2021 | Chaosium | Call of Cthulhu (Now) | Vermont; December |
| The Lost City | 1997 | Ubar | | | Self Published | Call of Cthulhu (Now) | Oman |
| Lost in a Book | 138-152 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Lost in Cremation | | Lost in Cremation | | May 2024 | Chaosium | Call of Cthulhu (Now) | Denmark; 2003; January |
| A Love in Need | 12-21 | Secrets | CHA2367 | 1997 | Chaosium | Call of Cthulhu (Now) | 1990s; Byakhee |
| Love's Lonely Children | 4-18 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| Love's Lonely Children | 7-23 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | |
| Lovers Moon | Feb 2008 | Pyramid Volume 2 | | | Steve Jackson Games | Call of Cthulhu (Now) | |
| The Lumber Baron's Ball | 36- | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| The Lunar Eclipse Gala | | The Lunar Eclipse Gala | | Mar 2021 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Machine Guns | 168-176 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Mad Sci: How to Train Your Shoggoth | | Mad Sci: How to Train Your Shoggoth | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | |
| Madeline "Maddy" Monroe | | Sidekicks for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Madness from the Mythos | 60-62 | Challenge | 60 | May 1992 | Games Designers Workshop | Call of Cthulhu (Now) | |
| The Madness of the Twilight Queen | 49-76 | Nocturnum: Long Shades | CC01 | 1997 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| The Madness of the Twilight Queen | 64-86 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Malcolm Thornhill | | Villains for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Mall Rats | | Mall Rats | | May 2020 | Chaosium | Call of Cthulhu (Now) | Wisconsin; 2019; Summer |
| The Man in the Hat | 3-52 | The Ghosts in the House | CHA0396 | 2010 | Chaosium | Call of Cthulhu (Now) | Wisconsin |
| The Mandragora Project | 24-29 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Now) | |
| Manoeuvres on the Moor | | Manoeuvres on the Moor | | Apr 2021 | Chaosium | Call of Cthulhu (Now) | England |
| The Manor House | 5-12 | Live Evil | | 2004 | Self Published | Call of Cthulhu (Now) | Wales; 2002; Halloween |
| Manumbalik | | Manumbalik | | Jul 2023 | Chaosium | Call of Cthulhu (Now) | Philippines; April; 2021 |
| The Mardler House | 10-31 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Now) | 2010s |
| The Marking Controversy | May 2003 | Pyramid Volume 2 | | | Steve Jackson Games | Call of Cthulhu (Now) | |
| Martha's Vinyard, MS | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Mary Alpert's Homepage | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Now) | |
| The Mask | | The Mask | | Apr 2022 | Chaosium | Call of Cthulhu (Now) | |
| Masters, Pawns, and Traitors | 9-23 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Mauerfall | | Mauerfall 1961-1989 | | Feb 2020 | Chaosium | Call of Cthulhu (Now) | Germany |
| Mavca (Nyavka) / Deadly Temptress of Ukraine | Oct 2023 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Mayhem in the Limelight | | Mayhem in the Limelight | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Japan; August; 2025 |
| Mayor Margaret Darkwood | | Villains for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| The Maze of Dispair | 33-38 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Maze of Dispair | | The Maze of Dispair | YH-C-7E | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Mediumship Explored | 83-86 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| The Meeting Room of Madness | 15-20 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Meeting Room of Madness | | The Meeting Room of Madness | YH-C-7B | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Meiro | 270-283 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | Japan; 2002 |
| The Memories Below | 3-14 | The Memories Below | | Jan 2024 | Chaosium | Call of Cthulhu (Now) | |
| Mental Health in the UK | 7-9 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| Merchant Section | 51-66 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Metagame | | Metagame | | Dec 2024 | Chaosium | Call of Cthulhu (Now) | November; 2011 |
| Midnight Harvest | 1-37 | Midnight Harvest | OWC4003 | 2008 | Super Genius | Call of Cthulhu (Now) | Rhode Island; Halloween |
| Midterm Getaway | | Five Faces of Fear | | Jul 2019 | Chaosium | Call of Cthulhu (Now) | South Africa |
| Mike Johnson | | Sidekicks for Modern Horror - Book 6 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Mikladalur, Faroe Islands | 23 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Million Flavoured Ones | 3-15 | The Million Flavoured Ones | | May 2024 | Chaosium | Call of Cthulhu (Now) | |
| The Mirror Collection | | The Mirror Collection | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | North East; October; 1980s |
| Miskatonic Confidential Female Modern | | Miskatonic Confidential Female Modern | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | |
| Miskatonic Confidential Male Modern | | Miskatonic Confidential Male Modern | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | |
| Miskatonic University Campus | 71-103 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Miskatonic University: Life at the World's Scariest School Part 1 | | Chaosium Digest | v27n09 | Mar 1999 | Chaosium | Call of Cthulhu (Now) | |
| Miskatonic University: Life at the World's Scariest School Part 2 | | Chaosium Digest | v27n10 | Mar 1999 | Chaosium | Call of Cthulhu (Now) | |
| Miskatonic University: Life at the World's Scariest School Part 3 | | Chaosium Digest | v27n11 | Mar 1999 | Chaosium | Call of Cthulhu (Now) | |
| The Missing Cat | 3-12 | The Missing Cat | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | Maine; 1995; April |
| Missing in the Woods | | Missing in the Woods | | Jan 2021 | Chaosium | Call of Cthulhu (Now) | October |
| Missing Kids | 2007 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Missing Playback | | The Palimpsest Trilogy | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States |
| Mistress Isabella Blackwood | | Villains for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Mizuumi no bakemono | | Mizuumi no bakemono | | Aug 2018 | Chaosium | Call of Cthulhu (Now) | Japan; February; 2018 |
| Modern | | Big A** Book of Hooks | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | |
| Modern Days NPCs Art Pack | | Modern Days NPCs Art Pack | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | |
| Modern Era Characters | 38-67 | Sensitive Cases Division | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | |
| Modern Minions of Cthulhu: Paranormal Creatires of the Mythos | 12-? | Polyhedron | 124 | Sep 1996 | TSR | Call of Cthulhu (Now) | |
| Modern Mythos Investigation | | Chaosium Digest | v01n06 | Feb 1993 | Chaosium | Call of Cthulhu (Now) | |
| Mohole | 107-148 | Petersen's Abominations | CHA23152 | 2017 | Chaosium | Call of Cthulhu (Now) | North Sea |
| The Monongahela Carver Cipher | 20-21 | The Unspeakable Oath | 20 | Jun 2011 | Pagan Publishing | Call of Cthulhu (Now) | |
| The Monongahela Carver Cipher | 166-167 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| Montreal, Quebec | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Moon of the Wolf | 29-31 | Protodimension | 19 | Spr 2014 | Kinstaff Media | Call of Cthulhu (Now) | |
| The Moonchild | 142-177 | Nameless Horrors | CHA23133 | 2015 | Chaosium | Call of Cthulhu (Now) | England; 2013 |
| The Moonchild | | Missed Dues | CHA0419 | 2013 | Chaosium | Call of Cthulhu (Now) | England; 2013 |
| The Moonchild | | Missed Dues and Other Adventures | | 2013 | Chaosium | Call of Cthulhu (Now) | England; 2013 |
| The Moonchild | 137-170 | Nameless Horrors | CHA23180 | 2023 | Chaosium | Call of Cthulhu (Now) | England; 2013 |
| More X-Cthulhu Ideas | | Chaosium Digest | v12n10 | Jan 1996 | Chaosium | Call of Cthulhu (Now) | |
| Moscow Showdown | 64-72 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Russia |
| Moscow Showdown | 225-233 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Russia |
| A Most Awful Plant | 348-367 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Georgia state; 1990s |
| A Most Awful Plant | 1-20 | A Most Awful Plant | | 1999 | Self Published | Call of Cthulhu (Now) | Georgia state; 1990s |
| A Most Awful Plant | 6-21 | Opifex Bimonthly | 6 | Mar 1997 | Self Published | Call of Cthulhu (Now) | Georgia state; 1990s |
| The Mound in the Yard | 1-16 | The Mound in the Yard | | Oct 2020 | Self Published | Call of Cthulhu (Now), GURPS (Horror) | Tennessee; July; 1981 |
| Mount Katahdin's Shadow | 6-31 | Mount Katahdin's Shadow | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Maine; 1988; Autumn |
| Mrs Bentley's Coloring Books | 52-55 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Now) | California |
| Muerte al Chupacabras! | | Muerte al Chupacabras! | SKP01010 | 2010 | Skirmisher Publishing | Call of Cthulhu (Now) | New Mexico |
| Mulderian Maunderings | | Chaosium Digest | v12n11 | Jan 1996 | Chaosium | Call of Cthulhu (Now) | |
| Murder at Miskatonic | | Murder at Miskatonic | SKP0820 | 2008 | Skirmisher Publishing | Call of Cthulhu (Now) | Arkham |
| A Murder in Suburbia | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | 1990s |
| Murder Incorporated | | Murder Incorporated | | 2003 | Self Published | Call of Cthulhu (Now) | London |
| The Murder Shack | | The Blasphemous Tome | 5.5 | Aug 2020 | Self Published | Call of Cthulhu (Now) | |
| Music | 77 | Protodimension | 2 | Aut 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| Music From the Stars | 2001 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Music of the Spheres | 99-121 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | Nebraska |
| The Music of the Spheres | 112-136 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | Nebraska |
| My Aunt's House | 3-21 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1990s |
| My Guardian Monster | 2-11 | My Guardian Monster | | Jul 2019 | Chaosium | Call of Cthulhu (Now) | Massachusetts |
| My Uncle's Trunk | 6-17 | My Uncle's Trunk | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Boston |
| The Mythos and Modernity | 53-54 | Bayt al Azif | 4 | Jan 2022 | Bayt al Azif Inc | Call of Cthulhu (Now) | |
| The Mythos and Modernity | 26 | Bayt al Azif | 5 | May 2023 | Bayt al Azif Inc | Call of Cthulhu (Now) | |
| Mythos Case Files: Fungi Mine | | Mythos Case Files: Fungi Mine | SG0007 | 2013 | Solace Games | Call of Cthulhu (Now) | Vermont; Mi-Go |
| The Mythos Gazetteer of the British Iles | 65-69 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| Mythosophobia | 2-22 | Mythosophobia | | 2016 | Xipe Totec Press | Cthulhu Confidential, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Mythoturbation | 93-109 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Mythoturbation | 2-18 | Mythoturbation | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Nakuko | | Nakuko | FXC-04 | 2019 | Stygian Fox | Call of Cthulhu (Now) | Japan; 1990s |
| Nassau, Bahamas | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Natasha | 40 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic), Call of Cthulhu (Now) | |
| Native Treasures | 144-155 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Nazarene's Lot | | Nazarene's Lot | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | Massachusetts; 1983 |
| Neighborhood | 1-9 | Neighborhood | | | Self Published | Call of Cthulhu (Now) | |
| Nemo Solus Sapit | 19-34 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | California |
| Nemo Solus Sapit | 24-41 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | California |
| New Clear Semiotics | 52-67 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| New Clear Semiotics | 2-28 | New Clear Semiotics | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| New Equipment | 12-14 | Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) | |
| New Equipment | 12-14 | Cthulhu Now | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| A Newport Christmas | Dec 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Rhode Island |
| NewU: A Cursed Herbal Supplement | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Night Bus | | The Blasphemous Tome | 8 | Dec 2021 | Self Published | Call of Cthulhu (Now) | |
| A Night in the Mountains | 47-52 | Demonground | 15 | Sep 2002 | Self Published | Call of Cthulhu (Now) | New York State; 2000s; Dimensional Shambler |
| The Night Mother's Moon | 3-15 | The Night Mother's Moon | FXC-21 | Jun 2022 | Stygian Fox | Call of Cthulhu (Now) | New York; Tcho-Tcho |
| The Night Season | 100-121 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | Alaska |
| The Night Season | 57-72 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| Nine Killer Snowmen | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December |
| No Pain, No Gain | 53-86 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | California; 1990s; Shub-Niggurath; Mi-Go |
| North Island Sanitorium | | North Island Sanitorium | | Jul 2021 | Chaosium | Call of Cthulhu (Now) | 2003 |
| Northside | 15-27 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| NPCs and Pre-Generated Characters | 50-69 | Counterfeit Identities | SFX3006 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Number 22 | | The Blasphemous Tome | 5 | Dec 2019 | Self Published | Call of Cthulhu (Now) | |
| Number 7 Dream | | Number 7 Dream | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | England |
| Nurse Abigail Wraith | | Villains for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Nurse Clara Martinez | | Sidekicks for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Occult Groups (Minicults) | 16-24 | Mystic Alliances | CHA0363 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Octopus Tag | | Octopus Tag | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | |
| Of Dreams and Dark Water | 177-207 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Glaaki |
| Officer Kyle Ramirez | | Sidekicks for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Oklumin Lake | | Oklumin Lake | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | Washington |
| Oktoberfrisst | 3-165 | Oktoberfrisst | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | Germany; September; 2023 |
| Old Blood | 34-57 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Mexico; 1990s |
| Old Blood | 1-23 | Old Blood | | 1996 | Self Published | Call of Cthulhu (Now) | Mexico; 1990s |
| Old Blood | 20-37 | Opifex Bimonthly | 5 | 1996 | Self Published | Call of Cthulhu (Now) | Mexico; 1990s |
| The Old Church Graveyard | 3-8 | The Old Church Graveyard | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States; 1986 |
| The Old Lady | 7 | Protodimension | 5 | Sum 2010 | Kinstaff Media | Call of Cthulhu (Now), Dark Conspiracy | |
| Omega Kappa DIE!!! | 5-43 | Omega Kappa DIE!!! | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | United States; 1999 |
| On Hostile Shores | | On Hostile Shores | | 2025 | ShadowLands Ediciones | Call of Cthulhu (Now) | |
| On The Road to Nowhere | 1999 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | United Kingdom |
| Once Bitten Twice Shy | | Once Bitten Twice Shy | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | France |
| One Friday Night | | One Friday Night | | Aug 2020 | Chaosium | Call of Cthulhu (Now) | |
| One Starry Night | | d infinity | 3 | May 2012 | Skirmisher Publishing | Call of Cthulhu (Now) | Arkham |
| One Starry Night | 3-12 | One Starry Night | | 2018 | Skirmisher Publishing | Call of Cthulhu (Now) | Arkham |
| One Step Beyond | 308-313 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| An Oneiric Resistance | 2-22 | An Oneiric Resistance | | 2016 | Xipe Totec Press | Cthulhu Dark, Call of Cthulhu (Now), Delta Green, Trail of Cthulhu, Cthulhu Confidential | |
| An Oneiric Resistance | 146-164 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Opening Act: The April Mix | 61-77 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now) | January; 2005 |
| Organ Donor | Dec 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Organism 46b | Nov 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Antarctica; Elder Thing |
| Oslo, Norway | 24 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| 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 | |
| Our Ladies of Sorrow | 126-131 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | |
| Out of the Ages | 86-104 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Now) | Washington DC |
| Out of the Depths | 140-156 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Out of the Depths | 1-17 | Out of the Depths | | 1992 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Out of the Mouths of Babes | | Serendipity's Circle | 11 | | Self Published | Call of Cthulhu (Now) | |
| Outbreak Generator Charts | 54-56 | Protodimension | 4 | Spr 2010 | Kinstaff Media | Call of Cthulhu (Now) | |
| An Outer Space Adventure Idea | | Chaosium Digest | v07n08 | Sep 1994 | Chaosium | Call of Cthulhu (Now) | Idaho; Yuggoth; Mi-Go; Moonbeast; Serpentman |
| The Outskirts | 123-131 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Overdue | 3-8 | Overdue | | Jun 2022 | Chaosium | Call of Cthulhu (Now) | Massachusetts |
| The Overhead Encounter | 3-16 | The Overhead Encounter | | Jul 2023 | Chaosium | Call of Cthulhu (Now) | Alabama; 1989; Summer |
| The Palid Masks of Tokyo | 145-178 | The Sutra of Pale Leaves: Twin Suns Rising | CHA23188 | Jun 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1987; Spring; Hastur |
| Panacea | 69-106 | Petersen's Abominations | CHA23152 | 2017 | Chaosium | Call of Cthulhu (Now) | |
| The Paper Man | | Chaosium Digest | v19n01 | Apr 1997 | Chaosium | Call of Cthulhu (Now) | 1990s |
| The Paper Man | Feb 1997 | rpg.net | | | Self Published | Call of Cthulhu (Now) | 1990s |
| 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) | |
| Paranormal Armed Response Agency (PARA) | 73-74 | Protodimension | 3 | Win 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| Parapsychology | 4-15 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| Parapsychology in the Lab | 69-71 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Parapsychology in the Laboratory | 16-19 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Party Gone Wrong: Of Harpies and Frogfaces | 24-32 | Mystic Alliances | CHA0363 | 2009 | Chaosium | Call of Cthulhu (Now) | Seattle; Halloween; 2010s |
| The Past is Doomed | 3-30 | The Past is Doomed | cr3004 | 2012 | Cthulhu Reborn | Call of Cthulhu (Now) | Arkham; 1990s; November |
| The Past is Doomed, Part One | | Chaosium Digest | v09n09 | Feb 1995 | Chaosium | Call of Cthulhu (Now) | Arkham; 1990s; November |
| The Past is Doomed, Part Three | | Chaosium Digest | v09n11 | Feb 1995 | Chaosium | Call of Cthulhu (Now) | Arkham; November; 1990s |
| The Past is Doomed, Part Two | | Chaosium Digest | v09n10 | Feb 1995 | Chaosium | Call of Cthulhu (Now) | Arkham; November; 1990s |
| Per Ardua? | | Per Ardua? | | 2010 | Draken Games | Call of Cthulhu (Now) | England |
| Performance Peace | 2-47 | Performance Peace | | Mar 2024 | Xipe Totec Press | Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now) | Scotland; Summer; 1970s |
| Petruska's Assumption | 2-16 | Petruska's Assumption | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu | |
| Phil's Pizza Palace | Jul 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Texas; Summer; 1989 |
| Phlebotomy | 146-176 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Ohio |
| The Phoenix Project | 1996 | hyperwerx.net | | | Self Published | Call of Cthulhu (Now) | New York State; 1990s |
| Pickman's Action Figure | 3-15 | Pickman's Action Figure | | May 2022 | Chaosium | Call of Cthulhu (Now) | New York State; 21st Century AD; Ghoul |
| A Picture of a Rose | Nov 2022 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Pines and Sunshine | 1-13 | Pines and Sunshine | | 1999 | Self Published | Call of Cthulhu (Now) | New England; 1990s |
| Pines and Sunshine | 23-35 | Opifex Bimonthly | 23 | Jan 2000 | Self Published | Call of Cthulhu (Now) | New England; 1990s |
| The Pipeline | | The Pipeline | | Sep 2018 | Critical Hit Publishing | Call of Cthulhu (Now) | Canada; Autumn; 1986 |
| A Place Just For Us | 2-15 | A Place Just For Us | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | Summer |
| Plague | | Plague | | Dec 2017 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Plans form the XXth Century | | Plans from the XXth century | 3001b | 2010 | Three Fourteen Games | Call of Cthulhu (Classic), Call of Cthulhu (Now), Trail of Cthulhu | |
| The Plawson Tapes | 27-28 | Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Now) | |
| Play, Repeat, Return | 1-9 | Play, Repeat, Return | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | Alaska; Summer; Elder Thing |
| Player of Hell | 7-12 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now) | 1990s |
| Player of Hell | 368-376 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | 1990s |
| Player of Hell | 1-9 | Player of Hell | | 2001 | Self Published | Call of Cthulhu (Now) | 1990s |
| Poetry Night | 118-122 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| The Politician's Wife | 44 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| Politics as Usual | | Politics as Usual | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | Scotland |
| Polly's Weird World | 14-25 | Green Mountain Mythos | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Vermont |
| Post Mortem | Jun 2015 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | New York; June; 2003 |
| Power to the People: An Examination of Systems of Government | 19-21 | The Last Province | 2 | Dec 1992 | Last Province Publishing | Call of Cthulhu (Now) | |
| Prepare Ye the Way | 78-113 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Pretty Good Plank | 32-43 | Mystic Alliances | CHA0363 | 2009 | Chaosium | Call of Cthulhu (Now) | Seattle; 2010s |
| Prisoners of the Frozen Dream | | Prisoners of the Frozen Dream | | Sep 2025 | Chaosium | Call of Cthulhu (Now) | |
| The Privateer's Diary | 75-80 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | Caribbean Sea; Ghoul |
| Problems With Transmission | Sep 2008 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| The Professionals | 54-70 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | New England |
| The Professionals | 63-81 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | New England |
| The Professor and the Cube | | The Professor and the Cube | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Maine |
| Professor Nathaniel Cross | | Villains for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Project Pi | 66-88 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (Now) | Pacific Ocean; May; 2000s |
| Prologue | 32-37 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | 2023 |
| Protect and Survive | | Protect and Survive | | Nov 2020 | Chaosium | Call of Cthulhu (Now) | |
| Prowler at the Threshold | | Prowler at the Threshold | | May 2023 | Chaosium | Call of Cthulhu (Now) | |
| 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 (Now), Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) | |
| Pulp Cthulhu: Department 29 New Gadgets! | | Pulp Cthulhu: Department 29 New Gadgets! | | Jan 2021 | Chaosium | Call of Cthulhu (Now) | |
| PULP Fiction | 1-8 | PULP Fiction | | | Self Published | Call of Cthulhu (Now) | England |
| Pulvis et Umbra Summus | 34-39 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Maine; Quachil Uttaus |
| Pussy's in the Well | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Now) | |
| Pussy's in the Well | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Putting Down | 32-46 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now) | Maine; 1990s |
| A Quest for Power | 4-17 | A Quest for Power | | Feb 2023 | Chaosium | Call of Cthulhu (Now) | England; 2017 |
| RAF Hobwood Stourbridge, West Midlands | 28-29 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| The Raid | 4-34 | Rise of the Dead - The Raid | CHA0393 | 2010 | Chaosium | Call of Cthulhu (Now) | March; Zombie |
| The Raid of Area 51 | | The Raid of Area 51 | | Oct 2019 | Chaosium | Call of Cthulhu (Now) | |
| Rare and Unusual: Paranormal Artefacts at the British Museum | 50-54 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| The Read Through | 2-72 | The Read Through | | Dec 2023 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Cthulhu Obscura, Trail of Cthulhu | |
| Reanimator | 16-28 | The Dreaming Prince | CHA0399 | 2011 | Chaosium | Call of Cthulhu (Now) | New York State |
| Reborn to Die | 38-62 | Toying With Humans | CHA0317 | 2005 | Chaosium | Call of Cthulhu (Now) | Arkham; May; 2005 |
| Recoil/Recall | 2-36 | Recoil/Recall | | Dec 2024 | Xipe Totec Press | Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Fear Itself | |
| Red Carpet Ready | 53-61 | Protodimension | 21 | Aut 2014 | Kinstaff Media | Call of Cthulhu (Now) | |
| The Red House | Sep 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Washington |
| A Red, Red Rose | | A Red, Red Rose | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Scotland; 2023 |
| The Reflection Stalkers | | Creatures for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Remains of the Deep | | Remains of the Deep | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | Pacific Ocean |
| Remaking the Hatteras Reef | 73-77 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | North Carolina |
| Resident Evil | 2-26 | Resident Evil | | 2002 | Self Published | Call of Cthulhu (Now) | |
| Residue of the Past | | Residue of the Past | | Jan 2021 | Chaosium | Call of Cthulhu (Now) | New Hampshire; Spring; 2020 |
| Resonance Cascade | 4-20 | Resonance Cascade | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | May; 2025 |
| Resort | | Resort | | Jan 2025 | Chaosium | Call of Cthulhu (Now) | 2020s |
| Ressurection | 91-95 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Rest Stops | 388-397 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | California; 1990s |
| Rest Stops | 1-10 | Rest Stops | | 1996 | Self Published | Call of Cthulhu (Now) | California; 1990s |
| Rest Stops | 4-11 | Opifex Bimonthly | 4 | 1996 | Self Published | Call of Cthulhu (Now) | California; 1990s |
| Restitution | | Restitution | | Dec 2020 | Chaosium | Call of Cthulhu (Now) | The Netherlands; 2020s |
| Resurrection Woods | | Resurrection Woods | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | Vermont |
| The Retreat | | The Retreat | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Montana |
| Return to the Monolith | 298-311 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Hungary; 1990s |
| Return to the Monolith | 1-14 | Return to the Monolith | | 1998 | Self Published | Call of Cthulhu (Now) | Hungary; 1990s |
| Return to the Monolith | 17-32 | Opifex Bimonthly | 12 | Mar 1998 | Self Published | Call of Cthulhu (Now) | Hungary; 1990s |
| The Reunion | Jun 2017 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | 2017 |
| Revelations | 81-88 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | Georgia state |
| Revelations | 151-158 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Georgia state |
| Revenge of the Hei People | 89-101 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Now) | England; 2007; Halloween |
| Reverend Ezekiel Stone | | Villains for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Rewards, Penalties and Lingering Effects | 135-136 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | |
| Rich Food | | Rich Food | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | California; December |
| Rifles | 93-133 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| River of Tears | 81-112 | Our Ladies of Sorrow | MRP0005 | 2009 | Miskatonic River Press | Call of Cthulhu (Now) | Illinois |
| Rivertown | 67-70 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| A Road Less Travelled | 13-26 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Road to Lunacy | | Road to Lunacy | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | |
| The Road Unraveled | | The Road Unraveled | | Apr 2020 | Chaosium | Call of Cthulhu (Now) | |
| Rocket Launchers | 181-184 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| The Rocky Vale Horror | 1-15 | The Rocky Vale Horror | | 2003 | Self Published | Call of Cthulhu (Now) | New York State; 2003 |
| Roleplaying | 35-70 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Romanian Contract | | The Romanian Contract | | May 2021 | Chaosium | Call of Cthulhu (Now) | Romania; 1920s |
| Room for One Less | 9-21 | Serendipity's Circle | 8 | Sum 1996 | Self Published | Nephilim, Call of Cthulhu (Now), Shattered Dreams, Chill, The Whispering Vault, Lost Souls | 1996 |
| Roots | 57-84 | The Things We Leave Behind | TTWLB | 2016 | Stygian Fox | Call of Cthulhu (Now) | |
| Roots | 38-48 | The Mark of Evil | | | Stygian Fox | Call of Cthulhu (Now) | |
| Rotten Factory | 21-22 | Protodimension | 4 | Spr 2010 | Kinstaff Media | Call of Cthulhu (Now) | |
| Round6 | | Round6 | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | |
| The Routine Autopsy | Apr 1995 | hyperwerx.net | | | Self Published | Call of Cthulhu (Now) | |
| Runaways | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Running a Parapsychological Campaign | 61-68 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) | |
| 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 the Scenario | 16-31 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | |
| Safe Space | | Safe Space | | Nov 2022 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Salem 1692 | 13-26 | Devil's Children | | 2004 | Pagan Publishing | Call of Cthulhu (Now), Call of Cthulhu (Strange Aeons) [1692] | Massachusetts; 1692; May |
| Samantha "Siren" Kane | | Villains for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Samuel "Sam" Walker | | Sidekicks for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Santa | | Santa | | Dec 2019 | Chaosium | Call of Cthulhu (Now) | |
| Santa Fe, NM | 14 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Sarah Hardcastle | 68-74 | The Black Seal | 4 | Aut 2023 | Sixtystone Press | Call of Cthulhu (Now) | |
| Sarah Miller | | Sidekicks for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Sarah's Friends | 5-19 | Protodimension | 6 | Aut 2010 | Kinstaff Media | Call of Cthulhu (Now) | London; January; Zombie |
| Satanists on the Graeg | 41 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now), Call of Cthulhu (Delta Green) | Wales |
| Saturday the 14th | 4-15 | Saturday the 14th | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Maine; 1980; June |
| The Scales of the Serpent | 3-18 | The Scales of the Serpent | | Apr 2020 | Chaosium | Call of Cthulhu (Now) | |
| The Scar's Calling | | The Scar's Calling | | Jun 2025 | Chaosium | Call of Cthulhu (Now) | Atlantic Ocean |
| The Scarecrow | 398-404 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | New Hampshire; 1990s |
| The Scarecrow | 1-7 | The Scarecrow | | 1991 | Self Published | Call of Cthulhu (Now) | New Hampshire; 1990s |
| The Scarecrow | 7-14 | Opifex Bimonthly | 13 | May 1998 | Self Published | Call of Cthulhu (Now) | New Hampshire; 1990s |
| Scary Monsters and Super Creeps | 18-22 | Different Worlds | 44 | Nov 1986 | Chaosium | Call of Cthulhu (Atomic), Call of Cthulhu (Now) | |
| Scenario Upgrade Pack: The Stars Are Right! | | Scenario Upgrade Pack: The Stars Are Right! | cr1002 | 2017 | Cthulhu Reborn | Call of Cthulhu (Now) | |
| Science Fiction Double Feature | 1-4 | Science Fiction Double Feature | | 2011 | Gratis Games | Call of Cthulhu (Now) | |
| Scions of the Dark Goddess | | Scions of the Dark Goddess | | Mar 2026 | Chaosium | Call of Cthulhu (Now) | United States; 2024 |
| The Screaming Horror of Creech Hill | 1-7 | The Screaming Horror of Creech Hill | | 2006 | Self Published | Call of Cthulhu (Now) | England |
| Scritch Scratch | 4-21 | Scritch Scratch | CHA23157 | 2018 | Chaosium | Call of Cthulhu (Now) | England |
| Sea Food | 405-442 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1996; Deep One |
| Sea Food | 1-38 | Sea Food | | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1996; Deep One |
| Sea Food | 5-37 | Opifex Bimonthly | 3 | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1996; Deep One |
| Season of Growth | | Season of Growth | | Dec 2023 | Chaosium | Call of Cthulhu (Now) | 1990s |
| Season's Greetings | 31-38 | Serendipity's Circle | 6 | Win 1995 | Self Published | Call of Cthulhu (Now), Bureau 13 | 1990s |
| The Second Amphora | | The Second Amphora | | Dec 2019 | Entente Cthuiana | Call of Cthulhu (Now) | |
| The Secret Song of Lake Billings | | The Secret Song of Lake Billings | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | Virginia; Summer |
| The Secrets of Aavnjuana | 2-30 | The Secrets of Aavnjuana | | Jul 2025 | Chaosium | Call of Cthulhu (Now) | Sweden; 1992; May |
| Secrets of Milton Keynes | | The Blasphemous Tome | 4.5 | Jun 2019 | Self Published | Call of Cthulhu (Now) | |
| Secrets of Milton Keynes | | The Blasphemous Tome | 5.5 | Aug 2020 | Self Published | Call of Cthulhu (Now) | |
| Secrets of the Glen | 4-21 | Secrets of the Glen | | May 2022 | Chaosium | Call of Cthulhu (Now) | Scotland |
| See No Evil, Speak No Evil | | See No Evil, Speak No Evil | | Sep 2024 | Chaosium | Call of Cthulhu (Now) | Norway; 2023 |
| See You in My Dreams | 27-32 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| See You in My Dreams | | See You in My Dreams | YH-C-7D | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Seized by Sugar | | Seized by Sugar | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | Halloween |
| Self-Guiding Bullets? | 77-81 | Protodimension | 13 | Aut 2012 | Kinstaff Media | Call of Cthulhu (Now) | |
| Sell Yourself | | Sell Yourself | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | New York; July; 2008 |
| Separation Anxiety | 7-12 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Ohio |
| Serifos, Greece | 25 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Sermon Grant, antiquarian, occultist and gentleman adventurer | 4-6 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now), Call of Cthulhu (Delta Green) | |
| Seven Grinches Grinching | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December |
| Seven Sister Hills | | Seven Sister Hills | | Jul 2021 | Chaosium | Call of Cthulhu (Now) | Midwest |
| The Severn Bank Giant | 35-44 | Demonground | 11 | Mar 2001 | Self Published | Call of Cthulhu (Now) | England |
| The Severn Valley | | Valkyrie | 16 | 1998 | Partizan Press | Call of Cthulhu (Now) | |
| Shadow and Illusion | 3-14 | Shadow and Illusion | | Apr 2024 | Chaosium | Call of Cthulhu (Now) | Chicago; 1920s |
| Shadow From the Past | | Shadow From the Past | | Dec 2024 | Chaosium | Call of Cthulhu (Now) | England |
| Shadow in the Trees | | Shadow in the Trees | | Aug 2025 | Chaosium | Call of Cthulhu (Now) | Australia |
| Shadow Over Stockton | 12-19 | Vortext | 1 | Spr 1991 | Vortex Publishing | Call of Cthulhu (Now) | Missouri; 1988 |
| Shadow Tag | | Shadow Tag | | Dec 2024 | Chaosium | Call of Cthulhu (Now) | Florida; 2024 |
| Shadows of Yith | | Shadows of Yith | | Jun 2024 | Chaosium | Call of Cthulhu (Now) | |
| Shadows on the Highway | | Shadows on the Highway | | Sep 2024 | Dark of the Night Network | Call of Cthulhu (Now) | Wyoming; October; 1987 |
| Shadyvill | | Shadyvill | | 2006 | Self Published | Call of Cthulhu (Now) | |
| Shattered Reality | 7-14 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| She Just Couldn't Stay Away (No, No) | 8-19 | The Unspeakable Oath | 20 | Jun 2011 | Pagan Publishing | Call of Cthulhu (Now) | |
| She Just Couldn't Stay Away (No, No) | 154-165 | Old Ones Rising | | 2017 | Arc Dream Publishing | Call of Cthulhu (Now) | |
| Sheriff Ezekiel Graves | | Villains for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Shimmering Seas | | Shimmering Seas | | Jun 2019 | Chaosium | Call of Cthulhu (Now) | Pacific Ocean |
| Shotguns | 134-147 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| The Shragged Man | 11-12 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Shrub's Revenge | | Shrub's Revenge | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | |
| The Signal Sirens | | Creatures for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Signal to Noise | 3-28 | Signal to Noise | | Jun 2023 | Chaosium | Call of Cthulhu (Now) | Pennsylvania; October; 1989 |
| The Silent Cure | 2-23 | The Silent Cure | | Feb 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1980s |
| Silent Key | | Five Faces of Fear | | Jul 2019 | Chaosium | Call of Cthulhu (Now) | Ireland |
| Silent Night | 3-18 | Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Now) | Arkham; December; 2001; Tcho-Tcho |
| Silent Night, Gory Night | | The Grindhouse: Holiday Special | | Nov 2021 | Chaosium | Call of Cthulhu (Now) | New England; December; 1978 |
| Silent Scream | 90-104 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Y'Golonac |
| Silent Valley | | Silent Valley | | Mar 2025 | Chaosium | Call of Cthulhu (Now) | Alaska |
| The Silk Road | 321-333 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Simulacrum Unbound | D:127-168 |  Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Now) | Turkey; 2013 |
| The Simulacrum Unbound | B:299-334 | Horror on the Orient Express | CHA23130-SET | 2020 | Chaosium | Call of Cthulhu (Now) | Turkey; 2013 |
| Sink Hole | 443-458 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Sink Hole | 1-16 | Sink Hole | | 1999 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| SinkHole | 7-22 | Opifex Bimonthly | 23 | Jan 2000 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Sins of My Youth | 18-22 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Hound of Tindalos |
| The Sins of the Father | | The Sins of the Father | | Dec 2021 | Chaosium | Call of Cthulhu (Now) | Canada; 2005 |
| Six Cults a-Culting | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December |
| Skinwalker | 59-77 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Now) | Arizona |
| The Sky is Falling | 29-32 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| The Sky is Falling | 113-116 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| A Sliver of Starlight | | A Sliver of Starlight | | Aug 2021 | Chaosium | Call of Cthulhu (Now) | New York State; 1983 |
| A Small Tremor in the Mountains | 3-16 | A Small Tremor in the Mountains | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | Iceland; 2020s |
| Smith and Wesson Model 500 Magnum | 35 | Protodimension | 2 | Aut 2009 | Kinstaff Media | Call of Cthulhu (Now), Dark Conspiracy | |
| The Smoglings | | Creatures for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| The Smokestack Horror | 74-88 | Halloween Horror 2 | CHA0333 | 2006 | Chaosium | Call of Cthulhu (Now) | Boston |
| Smuggling | 56 | The Unspeakable Oath | 24 | Jul 2014 | Pagan Publishing | Call of Cthulhu (Now) | |
| Snowflake Valley | 15-48 | Nocturnum: Long Shades | CC01 | 1997 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Snowflake Valley | 35-63 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Snows of an Early Winter | 2-96 | Snows of an Early Winter | OWC4007 | 2009 | Super Genius | Call of Cthulhu (Now) | New York; Halloween |
| Solomon Bites the Worm | | Chaosium Digest | v32n04 | Jul 2000 | Chaosium | Call of Cthulhu (Now) | England; Summer |
| Solomon Bites the Worm | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | England; Summer |
| Somebody Think of the Children | 3-26 | Somebody Think of the Children | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | United States; 1990s |
| SonnyCon | 88-110 | The Hollow Remains | | Feb 2025 | Revel Tales | Call of Cthulhu (Now) | Italy |
| The Sores | 78-84 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Wales |
| The Source and the End | 151-167 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | Colorado; Autumn |
| The Space Between | 178-216 | Nameless Horrors | CHA23133 | 2015 | Chaosium | Call of Cthulhu (Now) | Los Angeles |
| The Space Between | 171-203 | Nameless Horrors | CHA23180 | 2023 | Chaosium | Call of Cthulhu (Now) | Los Angeles |
| Spacecraft Floorplans | 65 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| The Spear of Y'Golonac | 1-35 | The Spear of Y'Golonac | | 2009 | Self Published | Call of Cthulhu (Now) | England; June; 2004 |
| The Spear of Y'golonac | 39-61 | Protodimension | 3 | Win 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| Special Delivery | 91-108 | Rewind | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1984 |
| The Special Menu | 134-139 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Spectral Tides | 1-14 | Spectral Tides | | Nov 2023 | Self Published | Call of Cthulhu (Now), GURPS (Horror), Dark Places and Demogorgons | Washington; 1980s |
| Spilsbury #9485 | 45-49 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | London |
| Spirit of a Thief | 1-17 | Spirit of a Thief | | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Spiritualism and Mediumship | 41-47 | Parapsycologist's Handbook | CHA0085 | 2003 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) | |
| Splatter Punks | 70-83 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Now) | Ohio; August; 1986 |
| Split | | Split | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | Vermont; 2005 |
| Split Ticket | 4-18 | Split Ticket | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | England; September; 2025; Mi-Go |
| Springfield, IL | 11 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Stained Glass | 2-19 | Stained Glass | | 2016 | Xipe Totec Press | Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Fear Itself | |
| The Stars are Righteous, Dude! | Mar 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | California; Shoggoth |
| Stay the Night | 234-240 | The Dread House | HDG8000 | 2017 | Hammerdog Games | Pathfinder, Dungeons and Dragons, Call of Cthulhu (Now) | Pennsylvania; 2017 |
| Stillness | 77-102 | Nocturnum: Long Shades | CC01 | 1997 | Fantasy Flight Games | Call of Cthulhu (Now) | California |
| Stillness | 87-106 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | California |
| Stinky Orphans | 3-18 | Stinky Orphans! | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | December |
| Stocastic Sparaogmas | 126-145 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Stochastic Sparaogmos | 2-23 | Stochastic Sparaogmos | | 2016 | Xipe Totec Press | Call of Cthulhu (Now), Fear Itself, Trail of Cthulhu, Cthulhu Dark, Delta Green | |
| Stranger's Race Vobster, Somerset | 82-83 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| The Strawman | 4-12 | The Strawman | | Aug 2022 | Chaosium | Call of Cthulhu (Now) | |
| Streets of Fear | 12 | Fantasy Chronicles | 1 | Jul 1985 | Fantastic Publications | Call of Cthulhu (Now) | |
| A Strict Protein Diet | 51-59 | Protodimension | 11 | Win 2012 | Kinstaff Media | Call of Cthulhu (Now) | |
| Stroudsberg, PA | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| Study, Art, Sacrifice | 4-76 | Study, Art, Sacrifice | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Sweden; 1997 |
| Submachine Guns | 148-167 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Suburban Zombies | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| The Sufferers' Guild | 71-82 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Sufficient Unto the Day | 28-46 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Now) | England; 2000s |
| Summon/Bind | 5-18 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Summon/Bind | 2-16 | Summon/Bind | | 2016 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark | |
| Sunscream | | Sunscream | | Sep 2024 | Dark of the Night Network | Call of Cthulhu (Now) | New Jersey; Summer; 1985 |
| Super 8 | 70-87 | Worlds of Cthulhu | 2 | Feb 2005 | Pegasus Press | Call of Cthulhu (Now) | New York; Y'Golonac |
| Superheroes Vs The Cthulhu Mythos | | Superheroes Vs The Cthulhu Mythos | | Nov 2020 | Chaosium | Call of Cthulhu (Now) | |
| Superswarm | Aug 2011 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | Antarctica |
| Sutra Chanting Network | | Japonism | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Japan |
| Swamp Bones | 1-30 | Swamp Bones | | 1996 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Swamp Bones | 23-51 | Opifex Bimonthly | 8 | Jul 1997 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| The Swarner Virus | 17 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Now) | |
| Sweet Dreams Are Made of This | 22-26 | Skeleton Crew | | Oct 1990 | Argus Specialist Publications | Call of Cthulhu (Now) | New York; 1990s |
| The Tablet of Leng | 54-58 | Protodimension | 8 | Spr 2011 | Kinstaff Media | Call of Cthulhu (Now) | |
| Tacoma, WA | 17 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| Tales from Ye Dusty Olde Crap Shoppe | 5-36 | Tales from Ye Dusty Olde Crap Shoppe | | Dec 2019 | Chaosium | Call of Cthulhu (Now) | New Jersey |
| Tales of the White Beast | 4-26 | Tales of the White Beast | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | Massachusetts; October; 1990s |
| The Tape of Terror | | The Tape of Terror | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | |
| Temple in the Ice | 241-266 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Antarctica; 2000 |
| Temple in the Ice | 1-26 | Temple in the Ice | | 2000 | Self Published | Call of Cthulhu (Now) | Antarctica; 2000 |
| Temple in the Ice | 6-29 | Opifex Bimonthly | 24 | Mar 2000 | Self Published | Call of Cthulhu (Now) | Antarctica; 2000 |
| Temporary Insanity | | Temporary Insanity | | 2004 | Self Published | Call of Cthulhu (Now) | |
| Ten | | Ten | | Oct 2019 | Chaosium | Call of Cthulhu (Now) | |
| Terra Occulta | 4-10 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| Terror in Reverse | 21-26 | Shattered Reality | YH-C-7 | Mar 2025 | Chaosium | Call of Cthulhu (Now) | |
| Terror in Reverse | | Terror in Reverse | YH-C-7C | Apr 2025 | Chaosium | Call of Cthulhu (Now) | |
| Theft at the Peabody | | Theft at the Peabody | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | |
| Thin Jack | 64-69 | Challenge | 70 | 1993 | Games Designers Workshop | Call of Cthulhu (Now) | 1992; Lesser Race |
| Thin Jack | 1-12 | Thin Jack | | 1992 | Self Published | Call of Cthulhu (Now) | 1992 |
| Thin Jack | 38-47 | Opifex Bimonthly | 3 | 1996 | Self Published | Call of Cthulhu (Now) | 1992 |
| The Thing from Jakarta | 1-13 | The Thing from Jakarta | | 2002 | Self Published | Call of Cthulhu (Now) | |
| The Thing from Jakarta | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | |
| The Thing from Jakarta, Part 1 | | Chaosium Digest | v36n09 | Oct 2002 | Chaosium | Call of Cthulhu (Now) | |
| The Thing from Jakarta, Part 2 | | Chaosium Digest | v36n10 | Oct 2002 | Chaosium | Call of Cthulhu (Now) | |
| The Thing in the Mine | 52 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | Wales |
| The Thing in the Park | 316-334 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Pennsylvania; 1990s |
| The Thing in the Park | 1-19 | The Thing in the Park | | 1996 | Self Published | Call of Cthulhu (Now) | Pennsylvania; 1990s |
| The Thing in Tunnel 12 | | The Thing in Tunnel 12 | | Sep 2022 | Chaosium | Call of Cthulhu (Now) | England; 1980s |
| Think Tank | 53-73 | End of the World | 0005 | 1994 | Triad Entertainments | Call of Cthulhu (Now) | Boston; November; Mi-Go |
| Third Time's the Charm | 208-228 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England |
| The Thirteenth Olympian | 91-100 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Now) | |
| This Fire Shall Kill | 35-53 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | San Francisco |
| This Fire Shall Kill | 42-62 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | San Francisco |
| Thor's Anvil | 89-108 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | Greenland |
| Thor's Anvil | 159-178 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Greenland |
| Three Great Old Ones | Dec 2001 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | December; Great Old One |
| Thunder Five | 35 | Protodimension | 20 | Sum 2014 | Kinstaff Media | Call of Cthulhu (Now), Dark Conspiracy | |
| The Time Thieves | | Creatures for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Timelines | 321-327 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Tinleg Munk and Error 'Fingers' Bonadi | | Chaosium Digest | v32n07 | Oct 2000 | Chaosium | Call of Cthulhu (Now) | |
| Tinleg Munk and Error 'Fingers' Bonadi | | RPG Archive | | | Self Published | Call of Cthulhu (Now) | |
| Tinsdown West | 87-90 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| To Believe | 56-64 | Adventures Unlimited | 3 | Aut 1995 | Bootstrap Press | Call of Cthulhu (Now), Kult | 1990s |
| Together Again | | Together Again | | Feb 2025 | Chaosium | Call of Cthulhu (Now) | Florida |
| Tom Davis | | Sidekicks for Modern Horror - Book 5 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Tomb of Ash | 21-31 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now) | Egypt; 1990s |
| Tomb of Ash | 554-567 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Egypt; 2000s |
| Tomb of Ash | 1-14 | Tomb of Ash | | 2002 | Self Published | Call of Cthulhu (Now) | Egypt; 2000s |
| The Tombola Cipher | 53-57 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now) | |
| Too Close to Home | | Too Close to Home | | Aug 2019 | Chaosium | Call of Cthulhu (Now) | |
| The Tormiss CRD, Model Z-17 | 123-127 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| Tourist Trap | | Tourist Trap | | Dec 2022 | Chaosium | Call of Cthulhu (Now) | Scotland; 2023 |
| Town Directory | 12-14 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| The Town of Kirkbridges | | The Town of Kirkbridges | | Apr 2020 | Chaosium | Call of Cthulhu (Now) | |
| Toy Soldiers | Oct 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Texas; 1990s |
| Trail of the Loathsome Slime | 10-11 | White Dwarf | 43 | Jul 1983 | Games Workshop | Call of Cthulhu (Now) | Antarctica |
| The Transmigration of the Emerald Lama | | The Transmigration of the Emerald Lama | | May 2020 | Chaosium | Call of Cthulhu (Now) | Japan; 2020 |
| The Travelers' Tale | Apr 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | |
| The Treader of the Stars | 26-28 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| Trepanning the Light Fantastic | | Trepanning the Light Fantastic | | Sep 2024 | Dark of the Night Network | Call of Cthulhu (Now) | Maine; 1983 |
| A Triangle Chronology | 84-87 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Tribal Dance | 1-17 | Tribal Dance | | | Self Published | Call of Cthulhu (Now) | England |
| Tribal Dance | 52-59 | Demonground | 10 | Aut 2000 | Self Published | Call of Cthulhu (Now) | England |
| Trick or Treat 2 | 7-30 | Trick or Treat 2 | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | New York State; 2017; Halloween |
| Trick R Treat | | Shadows of Sumnerville: Trick R Treat | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | United States; 1995; Halloween; October |
| The Trip | 9-33 | Last Call of Cthulhu | | Oct 2024 | Chaosium | Call of Cthulhu (Now) | England; 2020 |
| The Triumvirate | 83-99 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Trollenberg Terror | 43-46 | Protodimension | 19 | Spr 2014 | Kinstaff Media | Call of Cthulhu (Now) | |
| Trouble in Threes - Spring | | Trouble in Threes - Spring | | May 2019 | Chaosium | Call of Cthulhu (Now) | |
| Trouble in Threes - Summer | | Trouble in Threes - Summer | | Jul 2019 | Chaosium | Call of Cthulhu (Now) | |
| Trouble With the Piping | 2-15 | Trouble With the Piping | | Aug 2023 | Xipe Totec Press | Trail of Cthulhu, Cthulhu Dark, Delta Green, Fear Itself, Call of Cthulhu (Now) | |
| The True Housewives of Arkham | | The True Housewives of Arkham | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | Arkham |
| Truth or Consequences | Oct 2017 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | New Mexico; 1980; February; Wendigo |
| Tucson, AZ | 15 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| The Tunnel People | | The Tunnel People | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | Sweden |
| The Tunnel People | 5-24 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Sweden |
| Tuorsjaure | 2-16 | Tuorsjaure | | Sep 2023 | Chaosium | Call of Cthulhu (Now) | Sweden; 2012 |
| Tuorsjaure - A Shadow of What Once Was | 103-118 | Northern Lights and Darkness | | Nov 2024 | Chaosium | Call of Cthulhu (Now) | Sweden; 2012 |
| The Turning of the Wheel | 83-94 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Nepal |
| The Turning of the Wheel | 245-255 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Nepal |
| The Turquoise Sea | 4-10 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now) | |
| Two Mythos Tomes for Cthulhu Now | | Chaosium Digest | v07n05 | Aug 1994 | Chaosium | Call of Cthulhu (Now) | |
| Two Turntables and a Microphone | 3-16 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| The Tyrr Nemaii | 95-101 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Nepal |
| The Tyrr Nemaii | 256-262 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Nepal |
| The Unbearable Likeness | | The Unbearable Likeness | FXC-01 | Jun 2019 | Stygian Fox | Call of Cthulhu (Now) | New York |
| Uncle Han's Cabin | 5-13 | Green Mountain Mythos | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Vermont |
| Under the Tree | | Under the Tree | | Mar 2021 | Chaosium | Call of Cthulhu (Now) | England; 2010s |
| Undertow | 13-17 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | California |
| The Unholies | 49-50 | The Black Seal | 2 | Mar 2003 | Brichester University Press | Call of Cthulhu (Now) | |
| University of Tokyo | 334-342 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| Unland | 102-107 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | England |
| Unmasked Rally | 1-16 | Unmasked Rally | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| Unmasked Rally | 19-33 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | |
| An Unplanned Rescue | 79-80 | Fictional Reality | 18 | Dec 2004 | Self Published | Call of Cthulhu (Now) | |
| Unpleasant Dreams | 145-162 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Insect from Shaggai |
| Unremembered | | Unremembered | | Jan 2019 | Chaosium | Call of Cthulhu (Now) | New Orleans; 1993 |
| The Unsealed Room | 22-30 | Secrets | CHA2367 | 1997 | Chaosium | Call of Cthulhu (Now) | 1990s; Star Vampire |
| Unseasonable Blooming and Minuet | | Japonism | | Aug 2024 | Chaosium | Call of Cthulhu (Now) | Japan; December |
| Unspeakable Acts | | hyperwerx.net | | | Self Published | Call of Cthulhu (Now) | Georgia state |
| Unusual Suspects | | Unusual Suspects | | Aug 2025 | Human Gorilla | Call of Cthulhu (Now) | |
| Up Jumped the Reaper | 85-90 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | North Carolina |
| Up on the Rooftop | 1-18 | Up on the Rooftop | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | Vermont; 2018; December |
| Uptown | 111-122 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Urban Decay | 46-47 | Stark, Raving Mad! | | 1991 | Pagan Publishing | Call of Cthulhu (Now) | |
| Urban Pentimento | 29-32 | Aspirations | 3007 | 2019 | Stygian Fox | Call of Cthulhu (Now) | |
| The Urge to Purge | 12 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Now) | |
| Using Thermal Imagers in RPGs | 41-46 | Protodimension | 8 | Spr 2011 | Kinstaff Media | Call of Cthulhu (Now), Dark Conspiracy | |
| Valdr Galga | 1996 | drelb.free.fr | | | Self Published | Call of Cthulhu (Now) | August; 1996 |
| Valkyrie Rising | 1-73 | Valkyrie Rising | | Nov 2025 | Chaosium | Call of Cthulhu (Now) | Germany; 2025; October |
| The Vanishing | | The Vanishing | | Jun 2024 | Chaosium | Call of Cthulhu (Now) | Texas; Autumn; 1997 |
| Video Nightmare | 62-67 | Challenge | 61 | Jun 1992 | Games Designers Workshop | Call of Cthulhu (Now) | 1990s |
| The Village | 13-17 | Live Evil | | 2004 | Self Published | Call of Cthulhu (Now) | Wales; 2002; Halloween |
| Vincent "Viper" Valentino | | Villains for Modern Horror - Book 4 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Viral | | Viral | | Apr 2022 | Chaosium | Call of Cthulhu (Now) | Italy |
| Viral | | Viral Unredacted | | Jun 2022 | Chaosium | Call of Cthulhu (Now) | Italy |
| Virus | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Now) | |
| Virus | 1996 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Visions from Beyond | 73-86 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | |
| Visiting Hours | 49-59 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | New Hampshire |
| Visiting Hours | 121-130 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | New Hampshire |
| Voice Over the Phone | 149-185 | Petersen's Abominations | CHA23152 | 2017 | Chaosium | Call of Cthulhu (Now) | Texas |
| Wabbit Season | 2004 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Waiting to be Born | 96-101 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Texas |
| Walking the Streets of Arkham | 4-14 | Walking the Streets of Arkham | | Oct 2025 | Chaosium | Call of Cthulhu (Now) | Arkham; 2025; July |
| Walter "Walt" Harris | | Sidekicks for Modern Horror - Book 3 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) | |
| Walter's Final Wish | 23-27 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | Ohio |
| Wanted | 24-26 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| Wanted | 107-110 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| War of the Spectres | 7-21 | Strange Tales of Dread & Wonder #2 | CHA0330 | 2006 | Chaosium | Call of Cthulhu (Now) | Afghanistan; December; 2001 |
| The Watcher Out of Time | 124-144 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Daoloth |
| The Watchers | 87-97 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | |
| Waves to Vistas Unknown | | Waves to Vistas Unknown | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | Canada; September; 2024 |
| We Dream of Flying | 3-9 | We Dream of Flying | | Aug 2023 | Chaosium | Call of Cthulhu (Now) | Pacific Ocean |
| Weapon Game Stats | 47-53 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| Weapons and the Law | 32-46 | Investigator Weapons Volume 2: Modern Day | 60-IHB02 | 2015 | Sixtystone Press | Call of Cthulhu (Now) | |
| The Weaving of Three | 35-55 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | Denmark |
| The Weaving of Three | 197-216 | Nocturnum: d20 | CC05 | 2002 | Fantasy Flight Games | Call of Cthulhu (Now) | Denmark |
| Web of Memory | 33-45 | Whispers in the Dark | 0003 | Oct 1993 | Triad Entertainments | Call of Cthulhu (Now) | San Francisco |
| Web of Shadows | 5-28 | Web of Shadows | YH-C-10 | Aug 2025 | Chaosium | Call of Cthulhu (Now) | Nevada; Atlach-Nacha |
| A Welcome in the Hills | 1-16 | A Welcome in the Hills | | 2008 | Self Published | Call of Cthulhu (Now) | Wales; 2007 |
| Welcome to Arkham | 6-11 | Arkham Now | CHA23116 | 2009 | Chaosium | Call of Cthulhu (Now) | |
| Welcome to the Kraven-Hammer Mall | | Welcome to the Kraven-Hammer Mall | | Mar 2024 | Chaosium | Call of Cthulhu (Now) | Illinois |
| The Well | 584-594 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | England; 1990s |
| The Well | 1-11 | The Well | | 1999 | Self Published | Call of Cthulhu (Now) | England; 1990s |
| The Well | 11-24 | Opifex Bimonthly | 14 | Jul 1998 | Self Published | Call of Cthulhu (Now) | England; 1990s |
| What the Fu?! | | What the Fu?! | | Oct 2021 | Chaosium | Call of Cthulhu (Now) | Malaysia |
| Whatever Happened to Alicia Thorne? | | Whatever Happened to Alicia Thorne? | FXC-13 | 2020 | Stygian Fox | Call of Cthulhu (Now) | Maine |
| The Wheel of Fortune | | Nightscapes | 7 | Apr 1998 | Self Published | Call of Cthulhu (Now) | New York; 1990s |
| Wheeling, WV | | Hometown Horrors Volume One | | Jul 2022 | Chaosium | Call of Cthulhu (Now) | |
| WHEL | | Chaosium Digest | v18n12 | Apr 1997 | Chaosium | Call of Cthulhu (Now) | |
| WHEL | 49-50 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Now) | |
| WHEL | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| WHEL | Feb 1997 | rpg.net | | | Self Published | Call of Cthulhu (Now) | |
| When Badgers Attack | 63 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Now) | |
| When Evil Wins | Mar 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | |
| When Sleigh Bells Ring | Dec 2019 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | December; Insect from Shaggai |
| When the Light Goes Out | | When the Light Goes Out | | Feb 2019 | Chaosium | Call of Cthulhu (Now) | Oregon |
| When the Stars Come Right Again | 122-128 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Now) | |
| When the Stars Come Right Again | 168-175 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now) | |
| Where a God Shall Tread | 86-117 | At Your Door | CHA2326 | 1990 | Chaosium | Call of Cthulhu (Now) | Canada; 1990s; Rhan-Tegoth; Serpentman; Tcho-Tcho; Mr Shiny |
| Where Madness Watches | 2-27 | Where Madness Watches | | Jul 2025 | Chaosium | Call of Cthulhu (Now) | Syria; Yog-Sothoth |
| Where Nothing Ever Happens | | Five Faces of Fear | | Jul 2019 | Chaosium | Call of Cthulhu (Now) | Ireland |
| Whistleblower | | Whistleblower | | Nov 2019 | Chaosium | Call of Cthulhu (Now) | 2019; November |
| White House Outhouse | Feb 2018 | Reckoning of the Dead | | | Self Published | Call of Cthulhu (Now) | Washington DC |
| Whiterock | | Shadows of Sumnerville Whiterock | | Dec 2025 | Chaosium | Call of Cthulhu (Now) | Arkham; 2000; March |
| Who's That Knocking | 102-111 | The Bride of Halloween Horror | CHA0364 | 2009 | Chaosium | Call of Cthulhu (Now) | Midwest; Halloween |
| A Whole Pack of Trouble | 6-24 | Occam's Razor | | 2021 | Stygian Fox | Call of Cthulhu (Now) | Arkham |
| Whose Fuel is Men and Stones | 28-33 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | London; Cthugha |
| Why Cthulhu Now? | | Intellect Devourer | 7 | Jun 1988 | Self Published | Call of Cthulhu (Now) | |
| Wicker Hollow | 5-13 | Wicker Hollow | | Jul 2024 | Chaosium | Call of Cthulhu (Now) | New Hampshire |
| Will's Island | 1-14 | Will's Island | | 1998 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Will's Island | 8-21 | Opifex Bimonthly | 15 | Sep 1998 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Willow Manor | | hyperwerx.net | | | Self Published | Call of Cthulhu (Now) | November; 1926 |
| Wills Island | 595-608 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Wilson's Lodge | 16-30 | The House That Stands Alone | CHA0395 | 2010 | Chaosium | Call of Cthulhu (Now) | Maine; Hunting Horror |
| win32.tiktok.man.trojan | Oct 2021 | shoggoth.net | | | Self Published | Call of Cthulhu (Now) | |
| Window of the Mind | 1-11 | Window of the Mind | | 2001 | Self Published | Call of Cthulhu (Now) | Ohio |
| The Windthrope Legacy | 58-69 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) | England; Insect from Shaggai |
| The Winoka Point Research Center | 140-145 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now) | |
| The Witch | 121-129 | Inversion | | Feb 2024 | Chaosium | Call of Cthulhu (Now) | 2023 |
| The Wonder at Mercury | 34-51 | Mythos in Medias Res | | 2016 | Xipe Totec Press | Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Trail of Cthulhu | France |
| The Wonder at Mercury | 2-20 | The Wonder at Mercury | | 2016 | Xipe Totec Press | Delta Green, Call of Cthulhu (Now), Trail of Cthulhu, Cthulhu Dark | |
| Wonderland | 66-109 | The Sutra of Pale Leaves: Carcosa Manifest | CHA23189 | Sep 2025 | Chaosium | Call of Cthulhu (Now) | Japan; 1988; Spring; Hastur |
| Woodson Pond | 377-387 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Woodson Pond | 1-11 | Woodson Pond | | 1999 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Woodson Pond | 7-17 | Opifex Bimonthly | 16 | Nov 1998 | Self Published | Call of Cthulhu (Now) | Florida; 1990s |
| Word from on High | | Chaosium Digest | v18n12 | Apr 1997 | Chaosium | Call of Cthulhu (Now) | |
| Word from on High | 49 | Tales of Terror (III) | | | Self Published | Call of Cthulhu (Now) | |
| Word from On High | 1997 | talesofterror.net | | | Self Published | Call of Cthulhu (Now) | |
| Word From on High | Feb 1997 | rpg.net | | | Self Published | Call of Cthulhu (Now) | |
| A World in Chaos | 9-16 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now) | |
| The World of Necronomicon | | The World of Necronomicon | | Jun 2020 | Chaosium | Call of Cthulhu (Now) | |
| The Worm of Wall Street | | The Worm of Wall Street | | Nov 2023 | Chaosium | Call of Cthulhu (Now) | New York |
| The Wrong | 609-626 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Wrong | 1-18 | The Wrong | | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| The Wrong | 5-19 | Opifex Bimonthly | 5 | 1996 | Self Published | Call of Cthulhu (Now) | Maine; 1990s |
| Wrong Turn | 65-85 | Cthulhu Britannica | CB7350 | 2009 | Cubicle 7 | Call of Cthulhu (Now) | England; 2000s |
| X-Mythos | | Chaosium Digest | v12n07 | Dec 1995 | Chaosium | Call of Cthulhu (Now) | |
| The Yonaguni Monuments | 284-292 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | Japan |
| The Yonaguni Monuments | 10-24 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Now) | |
| York, North Youkshire | 22 | Hometown Horrors Volume Two | | Oct 2022 | Chaosium | Call of Cthulhu (Now) | |
| You in Your Small Corner | 4-7 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Now) | 1920s |
| Zombies! | | Zombies! | | Jan 2022 | Chaosium | Call of Cthulhu (Now) | |
