| Title | Code | Date | Publisher | System (Setting) |
|---|
 A C-Tech Primer | | 2011 | Self Published | CthulhuTech |
| Cabin Fever | | Aug 2019 | Chaosium | Call of Cthulhu (Now) |
| The Cabin in the Woods | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) |
| The Cabinets | | Apr 2021 | Chaosium | Call of Cthulhu (Now) |
 A Cable's Length From Shore/On a Bank by Moonlight * | PELGDGCC01 | 2018 | Pelgrane Press | The Fall of Delta Green, Cthulhu Confidential |
 Cacodemon | PGCW-U30 | 2019 | Petersen Games | Cthulhu Wars |
 The Cacophony | CT39 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG |
| Cafe au Morte | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) |
| Cages of Light and Lenses | | Feb 2020 | Chaosium | Call of Cthulhu (Classic) |
| The Cairo Guidebook | CHA2351 | 1995 | Chaosium | Call of Cthulhu (Classic) |
| Caligo Accedendum Tournament | CHA0309 | 2004 | Chaosium | Call of Cthulhu (Dark Ages) |
| Call of Catthulhu | COCAT01 | 2013 | Faster Monkey Games | Call of Cthulhu (Cathulhu) |
 Call of Catthulhu Deluxe * | | 2014 | CATTHULHU.com | Call of Cthulhu (Cathulhu) |
| Call of Cowthulhu | SJG1453 | 2007 | Steve Jackson Games | Munchkin |
| Call of Cthentacle | cth001 | 2009 | Postmortem Studios | Call of Cthentacle |
| Call of Cthulhu * | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic) |
 Call of Cthulhu * | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2324 | 1989 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2350-H | 1993 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2376 | 1998 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2399 | 2001 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA2396 | 2004 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | | 2006 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu * | CHA23126 | 2011 | Chaosium | Call of Cthulhu (Classic) |
| The Call of Cthulhu | | Feb 2023 | Steve Jackson Games | Choose Cthulhu |
| Call of Cthulhu 7th Edition Conversion Guidelines | CHA20135-CONV | 2017 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu 7th Edition Quick Start * | CHA23131 | 2013 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu d20 * | 886440000 | 2002 | Wizards of the Coast | Call of Cthulhu (Classic) |
 Call of Cthulhu Dice | SCTH18 | 2007 | Q-Workshop | Call of Cthulhu (Classic) |
| Call of Cthulhu Dice Bag | | | Q-Workshop | [None Listed] |
| Call of Cthulhu Dice Cup | | | Q-Workshop | [None Listed] |
| Call of Cthulhu Dice Tower | | | Q-Workshop | [None Listed] |
| Call of Cthulhu Dice Tray | KCGTRAYCTH | 2018 | King of the Castle Games | Call of Cthulhu (Classic) |
| Call of Cthulhu Quick-Start Rules | CHA23000 | 2004 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu Slipcase * | | 2015 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu Starter Set | CHA23158-X | 2018 | Chaosium | Call of Cthulhu (Classic) |
| Call of Cthulhu Survival Tips | | 2002 | Self Published | Call of Cthulhu (Classic) |
| Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG |
| Call of Cthulhu: The Coloring Book | CHA5116 | 2017 | Chaosium | Call of Cthulhu (Classic) |
| The Call of CthulWho | | 2024 | Skirmisher Publishing | Travel-Sized RPG |
| Call of d6-lite | | 2011 | KORPG Games | d6-lite |
| Call of Duty | | 2008 | Arclight | Call of Cthulhu (Classic) |
| Call of Madness | | 2021 | Czacha Games | Call of Madness |
| Call of Poolthulhu | | Jul 2018 | Passe Gaming | Call of Cthulhu (Classic) |
| The Call of the Necronomicon | | 2013 | Self Published | Fiasco Classic |
| The Call of the Storm | | Oct 2024 | Chaosium | Call of Cthulhu (Regency) |
| Call of the Wild | MAD09 | 2013 | Fantasy Flight Games | Mansions of Madness |
| Call to War | | 2017 | Wayward Rogues Publishing | Pathfinder |
| Called Forth By Thunder | | 2018 | Ludonova | Arkham Noir |
| Caller in Darkness | MIS5068 | 2015 | Misfit Studios | Mutants and Masterminds |
| The Calling | | 2019 | Cutlass Boardgames | The Calling |
| The Calling of the Blood | | Apr 2024 | Chaosium | Call of Cthulhu (Now) |
| Camp Hollow Lake | | Jul 2023 | Chaosium | Call of Cthulhu (Now) |
| Camp Kill | | Dec 2022 | Chaosium | Call of Cthulhu (Now) |
| Camp Otter Lake | | Feb 2023 | Chaosium | Call of Cthulhu (Now) |
| Camp Sunny | | 2017 | Chaosium | Call of Cthulhu (Now) |
| Camping in the Shurgas | | Jan 2023 | Chaosium | Call of Cthulhu (Now) |
| The Camping Trip | | Sep 2018 | Chaosium | Call of Cthulhu (Classic) |
| Campo de Mitos | | 2020 | Mindscape Publishing | Call of Cthulhu (Classic) |
| Campus Crusade for Cthulhu | | | Self Published | Call of Cthulhu (Now) |
| Can't Stop the Loneliness | | Jun 2020 | Chaosium | Call of Cthulhu (Strange Aeons) [17th Century] |
| Canis Mysterium | CHA23124 | 2013 | Chaosium | Call of Cthulhu (Classic) |
| Cans | | Nov 2023 | Chaosium | Call of Cthulhu (Now) |
| Canyon of the Snow Cairns | | May 2020 | Self Published | GURPS, Call of Cthulhu (Strange Aeons) [Ice Age], Savage Worlds |
| Carcosa | | 2008 | Self Published | Dungeons and Dragons |
| Carcosa | LFP0010 | 2011 | Lamentations of the Flame Princess | Lamentations of the Flame Princess |
| Carcosa | | 2017 | One Free Elephant | Carcosa |
| Carcosa | DNH5 | 2018 | Fat Goblin Games | Dungeons and Dragons |
| Carcosa | DNH5 | 2018 | Fat Goblin Games | OSR |
| Carcosa | | 2019 | Officina Meningi | The Necronomicon Gamebook |
| A Carcosa Fringe Festival | | 2019 | Self Published | The Cthulhu Hack |
| Carcosa Rising | | 2020 | Ganesha Games | Four Against Darkness |
| Cards from the Smoke * | CB7357 | 2017 | Cubicle 7 | Call of Cthulhu (Classic) |
| The Cards of Cthulhu | | 2014 | Dan Verssen Games | The Cards of Cthulhu |
| The Cards of Cthulhu (print and play) * | | 2012 | Self Published | The Cards of Cthulhu |
| The Cards of Cthulhu: Bonus Pack | DV1029A | 2014 | Dan Verssen Games | The Cards of Cthulhu |
| The Cards of Cthulhu: Coin Pack | DV1029C | 2016 | Dan Verssen Games | The Cards of Cthulhu |
| Care Forgot | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) |
| Carnevale of Horror * | uACH10 | 2016 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Carnival of Madness | | Oct 2021 | Critical Hit Publishing | Call of Cthulhu (Strange Aeons) [1970] |
| Carnival/Cthulhu | | 2020 | Everything Epic Games | Grind House |
| Carousel of Fears | | Mar 2021 | Chaosium | Call of Cthulhu (Now) |
| Cartomacy: Lovecraft Country | SFX2023 | 2019 | Stygian Fox | None |
| Cartomancy: Multiverse Franz Josef Land | SFX2025 | 2023 | Stygian Fox | None |
| The Case * | | 2021 | Self Published | The Case |
| Case By Case | | Dec 2022 | Chaosium | Call of Cthulhu (Now) |
| The Case of Bernard Brown | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| The Case of the Missing Professor | | 2014 | Cakebread and Walton | Dark Streets |
| The Case of the Shadow Traveller | FXC-12 | 2020 | Stygian Fox | Call of Cthulhu (Gaslight) |
| Castaway Island | | 2005 | Self Published | Call of Cthulhu (Now) |
| The Casting Call of Cthulhu | CHA0345 | 2007 | Chaosium | Call of Cthulhu (Now) |
| Castle Bravo | PELGT12 | 2010 | Pelgrane Press | Trail of Cthulhu |
| The Castle of Greed | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) |
| Cat's Cradle | | Jun 2022 | Chaosium | Call of Cthulhu (Classic) |
| Catch of the Day | | 2016 | Self Published | Lovecraftesque |
| The Catcott Collection | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) |
| Cathulhu | 60-KAT01 | 2014 | Sixtystone Press | Call of Cthulhu (Classic) |
| The Cats of Ulthar Card Game | | 2019 | Gilgamesh Games | The Cats of Ulthar Card Game |
| The Cats of UlthaRPG | | 2020 | Tales By Bob | The Cats of UlthaRPG |
| Caveat Emptor | | Jan 2024 | Golden Goblin Press | Call of Cthulhu (Invictus) |
| Celephais | | Mar 2023 | Chaosium | Call of Cthulhu (Dreamlands) |
| The Cell of Cthulhu Promo Card | | Jan 2015 | Steve Jackson Games | Munchkin |
| The Cemetery | | 2014 | Reality Blurs | tremulus |
 Cephalophobia | 1 | Mar 2014 | Miskatonic University Podcast | Call of Cthulhu (Now), Call of Cthulhu (Invictus), Call of Cthulhu (Classic) |
 Cerebretron | 3 | Mar 1987 | Self Published | Call of Cthulhu (Dreamlands) |
| Cerulean Tendril | | 2017 | Greater Than Games | Fate of the Elder Gods |
 Challenge | 43 | Apr 1990 | Games Designers Workshop | Space 1889, Call of Cthulhu (Gaslight) |
| Challenge | 46 | Oct 1990 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 48 | Feb 1991 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 49 | Apr 1991 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 54 | Nov 1991 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 56 | Jan 1992 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 57 | Feb 1992 | Games Designers Workshop | Call of Cthulhu (Gaslight) |
| Challenge | 58 | Mar 1992 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 60 | May 1992 | Games Designers Workshop | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Challenge | 61 | Jun 1992 | Games Designers Workshop | Call of Cthulhu (Now) |
| Challenge | 62 | Jul 1992 | Games Designers Workshop | Call of Cthulhu (Now) |
| Challenge | 63 | Aug 1992 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 64 | Sep 1992 | Games Designers Workshop | Call of Cthulhu (Gaslight) |
| Challenge | 65 | Oct 1992 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 66 | Nov 1992 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 67 | Dec 1992 | Games Designers Workshop | Call of Cthulhu (Gaslight) |
| Challenge | 70 | 1993 | Games Designers Workshop | Call of Cthulhu (Now) |
| Challenge | 71 | 1993 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 72 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 73 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 74 | 1994 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 76 | 1995 | Games Designers Workshop | Call of Cthulhu (Classic) |
| Challenge | 77 | 1995 | Games Designers Workshop | Call of Cthulhu (Classic) |
| The Change | | Nov 2021 | Chaosium | Call of Cthulhu (Now) |
| The Chanting | | Apr 2021 | Chaosium | Call of Cthulhu (Now) |
| Chants for the Old Ones | | 2024 | Cthulhu Project | Chants for the Old Ones |
| The Chaos Beyond the Gate | | 2019 | Matakishi's Tea House | The Cthulhu Hack |
| Chaos in Chiapas | | Oct 2024 | Chaosium | Call of Cthulhu (Now) |
| The Chaos Iteration | FS02 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Chaos of Cthulhu | | 2015 | Imp House | Chaos of Cthulhu |
| Chaosium Digest | v01n03 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v01n04 | Feb 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v01n06 | Feb 1993 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Chaosium Digest | v01n09 | Mar 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v01n10 | Mar 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v02n01 | Apr 1993 | Chaosium | None |
| Chaosium Digest | v02n03 | Apr 1993 | Chaosium | Call of Cthulhu (Darker Trails) |
| Chaosium Digest | v02n04 | Apr 1993 | Chaosium | Call of Cthulhu (Strange Aeons) |
| Chaosium Digest | v02n05 | May 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v02n06 | May 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v02n07 | Jun 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v02n10 | Jun 1993 | Chaosium | Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v02n11 | Jun 1993 | Chaosium | Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v02n12 | Jul 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v03n01 | Jul 1993 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v03n02 | Jul 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v03n04 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v03n06 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v03n09 | Aug 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v03n11 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n02 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n03 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n04 | Sep 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n05 | Oct 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n08 | Oct 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n10 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n11 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v04n12 | Nov 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n01 | Dec 1993 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n04 | Jan 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n06 | Jan 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n08 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n09 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n10 | Feb 1994 | Chaosium | Call of Cthulhu (Classic), Space 1889 |
| Chaosium Digest | v05n11 | Feb 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v05n12 | Mar 1994 | Chaosium | Call of Cthulhu (Delta Green) |
| Chaosium Digest | v06n01 | Mar 1994 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v06n03 | Apr 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v06n04 | Apr 1994 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Chaosium Digest | v06n07 | May 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v06n09 | May 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v06n11 | Jun 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v07n02 | Aug 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v07n05 | Aug 1994 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Chaosium Digest | v07n07 | Sep 1994 | Chaosium | None, Call of Cthulhu (Classic) |
| Chaosium Digest | v07n08 | Sep 1994 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v07n10 | Oct 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v07n11 | Oct 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v08n06 | Nov 1994 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v08n07 | Nov 1994 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v08n08 | Nov 1994 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v08n09 | Nov 1994 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v08n10 | Nov 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v09n04 | Dec 1994 | Chaosium | None, Call of Cthulhu (Classic) |
| Chaosium Digest | v09n05 | Dec 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v09n06 | Dec 1994 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v09n08 | Feb 1995 | Chaosium | Arkham Horror |
| Chaosium Digest | v09n09 | Feb 1995 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v09n10 | Feb 1995 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v09n11 | Feb 1995 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v09n12 | Mar 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v10n01 | Apr 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v10n02 | Apr 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v10n03 | Apr 1995 | Chaosium | Nephilim, Call of Cthulhu (Now) |
| Chaosium Digest | v10n11 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v10n12 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v11n02 | Jun 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v11n03 | Jul 1995 | Chaosium | Nephilim, Call of Cthulhu (Now) |
| Chaosium Digest | v11n05 | Aug 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v11n07 | Aug 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v11n09 | Sep 1995 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v12n07 | Dec 1995 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v12n08 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v12n09 | Jan 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v12n10 | Jan 1996 | Chaosium | None, Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Chaosium Digest | v12n11 | Jan 1996 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Chaosium Digest | v12n12 | Feb 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v13n01 | Feb 1996 | Chaosium | Mythos |
| Chaosium Digest | v13n06 | Mar 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v13n08 | Mar 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v14n06 | Apr 1996 | Chaosium | Mythos |
| Chaosium Digest | v14n11 | Jun 1996 | Chaosium | Mythos |
| Chaosium Digest | v15n01 | Jun 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v15n05 | Jul 1996 | Chaosium | Mythos |
| Chaosium Digest | v16n01 | Aug 1996 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v16n03 | Sep 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v16n05 | Sep 1996 | Chaosium | Mythos |
| Chaosium Digest | v16n06 | Oct 1996 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v16n07 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v16n08 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v16n09 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v16n10 | Oct 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v16n12 | Oct 1996 | Chaosium | Mythos |
| Chaosium Digest | v17n01 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n02 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n03 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n04 | Nov 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n06 | Dec 1996 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v17n07 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n08 | Dec 1996 | Chaosium | Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v17n09 | Dec 1996 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v17n10 | Dec 1996 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v17n12 | Jan 1997 | Chaosium | Call of Cthulhu (Now), Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v18n01 | Jan 1997 | Chaosium | Mythos |
| Chaosium Digest | v18n02 | Jan 1997 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v18n03 | Feb 1997 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v18n04 | Feb 1997 | Chaosium | Mythos |
| Chaosium Digest | v18n05 | Feb 1997 | Chaosium | Mythos |
| Chaosium Digest | v18n06 | Feb 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v18n07 | Feb 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v18n08 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v18n09 | Mar 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v18n10 | Mar 1997 | Chaosium | Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v18n11 | Mar 1997 | Chaosium | Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v18n12 | Apr 1997 | Chaosium | Call of Cthulhu (Delta Green), Call of Cthulhu (Classic) |
| Chaosium Digest | v19n01 | Apr 1997 | Chaosium | Call of Cthulhu (Cyberpunk), Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Chaosium Digest | v19n02 | May 1997 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v19n03 | May 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n04 | May 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n05 | May 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n06 | May 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n07 | May 1997 | Chaosium | Call of Cthulhu (Cyberpunk), Mythos |
| Chaosium Digest | v19n08 | May 1997 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v19n09 | May 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n10 | Jun 1997 | Chaosium | Mythos |
| Chaosium Digest | v19n11 | Jun 1997 | Chaosium | Call of Cthulhu (Dreamlands), Mythos |
| Chaosium Digest | v19n12 | Jun 1997 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v20n01 | Jun 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v20n04 | Jul 1997 | Chaosium | Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v20n05 | Jul 1997 | Chaosium | Mythos |
| Chaosium Digest | v20n06 | Jul 1997 | Chaosium | Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v20n07 | Jul 1997 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v20n11 | Aug 1997 | Chaosium | Mythos |
| Chaosium Digest | v20n12 | Aug 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v21n01 | Aug 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n02 | Aug 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n03 | Aug 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n04 | Aug 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n05 | Sep 1997 | Chaosium | Call of Cthulhu (Dreamlands), Mythos |
| Chaosium Digest | v21n06 | Sep 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n07 | Sep 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n11 | Sep 1997 | Chaosium | Mythos |
| Chaosium Digest | v21n12 | Sep 1997 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v22n01 | Sep 1997 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Cyberpunk) |
| Chaosium Digest | v22n04 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v22n05 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v22n06 | Oct 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v22n07 | Nov 1997 | Chaosium | Mythos |
| Chaosium Digest | v22n08 | Nov 1997 | Chaosium | Mythos |
| Chaosium Digest | v22n09 | Nov 1997 | Chaosium | Mythos |
| Chaosium Digest | v22n10 | Dec 1997 | Chaosium | Mythos |
| Chaosium Digest | v22n11 | Dec 1997 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v22n12 | Jan 1998 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v23n02 | Feb 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v23n06 | Mar 1998 | Chaosium | Mythos, Call of Cthulhu (Classic) |
| Chaosium Digest | v23n07 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v24n05 | Mar 1998 | Chaosium | Mythos |
| Chaosium Digest | v24n06 | Mar 1998 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v24n07 | Mar 1998 | Chaosium | Mythos |
| Chaosium Digest | v24n08 | Mar 1998 | Chaosium | Mythos |
| Chaosium Digest | v24n09 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v24n10 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v24n11 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v24n12 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v25n01 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v25n02 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v25n03 | Apr 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v25n04 | Apr 1998 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v25n05 | Apr 1998 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v25n06 | Apr 1998 | Chaosium | Call of Cthulhu (Delta Green) |
| Chaosium Digest | v25n10 | May 1998 | Chaosium | Mythos |
| Chaosium Digest | v25n11 | May 1998 | Chaosium | Mythos |
| Chaosium Digest | v25n12 | May 1998 | Chaosium | Mythos |
| Chaosium Digest | v26n01 | May 1998 | Chaosium | Mythos |
| Chaosium Digest | v26n02 | May 1998 | Chaosium | Mythos |
| Chaosium Digest | v26n03 | Jun 1998 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Classic) |
| Chaosium Digest | v26n04 | Jul 1998 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v26n05 | Jul 1998 | Chaosium | Mythos |
| Chaosium Digest | v26n06 | Aug 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v26n07 | Aug 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v26n09 | Oct 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v26n10 | Nov 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v26n11 | Nov 1998 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v26n12 | Dec 1998 | Chaosium | Call of Cthulhu (WWII), Call of Cthulhu (Darker Trails) |
| Chaosium Digest | v27n01 | Dec 1998 | Chaosium | Mythos |
| Chaosium Digest | v27n02 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v27n03 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v27n04 | Dec 1998 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v27n05 | Jan 1999 | Chaosium | Mythos |
| Chaosium Digest | v27n06 | Jan 1999 | Chaosium | Call of Cthulhu (Classic), Call of Cthulhu (Darker Trails) |
| Chaosium Digest | v27n08 | Feb 1999 | Chaosium | Call of Cthulhu (Classic), Mythos |
| Chaosium Digest | v27n09 | Mar 1999 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v27n10 | Mar 1999 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v27n11 | Mar 1999 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v28n03 | May 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v28n05 | Jun 1999 | Chaosium | Mythos, Call of Cthulhu (Now) |
| Chaosium Digest | v28n06 | Jul 1999 | Chaosium | Call of Cthulhu (Strange Aeons) [Alternate Earth], Call of Cthulhu (Classic) |
| Chaosium Digest | v28n07 | Aug 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v28n08 | Aug 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v28n10 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v28n11 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v28n12 | Oct 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n03 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n04 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n05 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n06 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n07 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n08 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n09 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n10 | Dec 1999 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v29n11 | Dec 1999 | Chaosium | Call of Cthulhu (Dreamlands) |
| Chaosium Digest | v29n12 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n01 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n02 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n03 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n04 | Jan 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n06 | Feb 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n07 | Feb 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n08 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n11 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v30n12 | Mar 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v31n06-07 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v31n09 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v31n11 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v31n12 | Jun 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v32n01 | Jul 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v32n04 | Jul 2000 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v32n07 | Oct 2000 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v32n10 | Nov 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v32n11 | Dec 2000 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v32n12 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n01 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n02 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n04 | Jan 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n05 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n06 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n07 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n08 | Apr 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n09 | May 2001 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v33n10 | May 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v33n11 | May 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n01 | Jun 2001 | Chaosium | Call of Cthulhu (Darker Trails) |
| Chaosium Digest | v34n02 | Jun 2001 | Chaosium | Call of Cthulhu (Darker Trails) |
| Chaosium Digest | v34n03 | Jun 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n05 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n06 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n07 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n08 | Aug 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n10 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n11 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v34n12 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v35n01 | Oct 2001 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v35n07 | Jan 2002 | Chaosium | Call of Cthulhu (Atomic) |
| Chaosium Digest | v35n10 | Mar 2002 | Chaosium | Godlike, Call of Cthulhu (Classic) |
| Chaosium Digest | v35n11 | Mar 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v35n12 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n01 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n02 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n03 | Apr 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n04 | May 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n05 | May 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n06 | Jun 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n07 | Jul 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n09 | Oct 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n10 | Oct 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v36n11 | Nov 2002 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v37n04 | Jan 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v37n08 | Apr 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v37n10 | Jun 2003 | Chaosium | Call of Cthulhu (Strange Aeons) [1757] |
| Chaosium Digest | v37n12 | Sep 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v38n01 | Sep 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v38n02 | Nov 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v38n03 | Nov 2003 | Chaosium | Call of Cthulhu (Classic) |
| Chaosium Digest | v38n05 | Jul 2004 | Chaosium | Call of Cthulhu (Strange Aeons) [Future] |
| Chaosium Digest | v38n06 | Aug 2004 | Chaosium | Call of Cthulhu (Now) |
| Chaosium Digest | v38n07 | Nov 2004 | Chaosium | Call of Cthulhu (Classic) |
| Character Pack | | 2018 | Sixpence Games | Cultists of Cthulhu |
| Characters Unbound I: Player's Guide | WDF33640 | 2014 | WildFire Games | The Void |
| Charlie Don't Surf | | 1997 | Self Published | Call of Cthulhu (Strange Aeons) [1969] |
| Chef and Sea Captain Promo * | | 2020 | Wyvern Gaming | Cthulhu: A Deck Building Game |
| Chez Cthulhu | SJG1397 | 2010 | Steve Jackson Games | Chez Cthulhu |
| The Chiaroscuro Descent | | Jul 2024 | Chaosium | Call of Cthulhu (Now) |
| Chicken Merry Hawk Deh Near * | | 2016 | Golden Goblin Press | Call of Cthulhu (Classic) |
| The Children of Atlach-Nacha | | 2015 | Self Published | Delta Green |
| Children of Chaac | | Jun 2021 | Type40 | Call of Cthulhu (Classic) |
| The Children of Fear | CHA23173 | 2020 | Chaosium | Call of Cthulhu (Classic) |
| Children of the Black Monolith | | 2023 | Gildor Games | Elemental |
| Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic) |
| Children of the Tides | | Feb 2022 | Chaosium | Call of Cthulhu (Now) |
| Children of the Web | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) |
| A Chill in Abashiri | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) |
| Chimes in the Dark | | Dec 2022 | Chaosium | Call of Cthulhu (Darker Trails) |
| The Chocolate Factory | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| The Choir of Nightmares | | 2019 | Devil Pig Games | Shadows Over Normandie |
| Christmas at the Sanatorium | | Dec 2021 | Chaosium | Call of Cthulhu (Classic) |
| Christmas in Kingsport | CHA0334 | 2006 | Chaosium | Call of Cthulhu (Gaslight), Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Chthonian | | 2001 | Self Published | Chthonian |
| Chthonian Highways | | 2019 | Ironspine Press | Chthonian Highways |
| Chthonian Stars | WDF25020 | 2011 | WildFire Games | Traveller (Chthonian Stars) |
| Church of Chiropteran Wisdom | | Dec 2018 | Chaosium | Call of Cthulhu (Classic) |
| The Church of St Dunstan of the Keys | | Apr 2020 | Chaosium | Call of Cthulhu (Now) |
| A Cigarette, A Blindfold, and You | PELGY13D | 2022 | Pelgrane Press | The Yellow King |
| Cinematic Environs: Arctic Lands | | Sep 2018 | Critical Hit Publishing | Call of Cthulhu (Classic) |
| Cinematic Environs: Desert Wastes | | Feb 2019 | Critical Hit Publishing | Call of Cthulhu (Classic) |
| Cinematic Environs: Mountains | | Mar 2019 | Critical Hit Publishing | Call of Cthulhu (Classic) |
| Cinematic Environs: Survival | | Jul 2020 | Critical Hit Publishing | Call of Cthulhu (Classic) |
| The Circle Undone * | AHC29 | 2019 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Circus of Mhodryak | | 2023 | Key Enigma | Circus of Mhodryak |
| Cities in Ruins | EH08 | 2017 | Fantasy Flight Games | Eldritch Horror |
| The City of Archives * | AHC23 | 2018 | Fantasy Flight Games | Arkham Horror: The Card Game |
| City of Arkham Forms | | Jan 2018 | Chaosium | Call of Cthulhu (Classic) |
| The City of Talos | DNH3 | 2017 | Fat Goblin Games | Dungeons and Dragons |
| The City of Talos | DNH3 | 2017 | Fat Goblin Games | OSR |
| The Clan | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Classic Playbooks | | 2013 | Reality Blurs | tremulus |
| Claws of Cthulhu | | Mar 2023 | Cliff Hanger | Claws of Cthulhu |
| Clean Up, Aisle Four! | | 2004 | Self Published | Call of Cthulhu (Now) |
| Click Clack | | Oct 2022 | Chaosium | Call of Cthulhu (Classic) |
| Clockwork and Cthulhu | CW001004 | 2012 | Cakebread and Walton | Clockwork and Chivalry |
| Close Call | SP1002 | 2011 | Stardust Publications | Dark Aeons |
| Clutching at Ignorance * | | 2003 | RPGA Network | Call of Cthulhu (Now) |
| CMON Comics: Vol 1 Promos | | 2021 | CMON Limited | Cthulhu: Death May Die |
| CMON Comics: Vol 2 Promos | | 2023 | CMON Limited | Cthulhu: Death May Die |
| Cobwebs of Death | | Apr 2023 | Twin Engine Publishing | Cthulhu Eternal |
| Codex | 4 | Dec 2016 | The Gauntlet | Lovecraftesque |
| Codex | 5 | Jan 2017 | The Gauntlet | Lovecraftesque |
| Codex | 34 | Sep 2019 | The Gauntlet | Cthulhu Dark |
| Codex | 41 | May 2020 | The Gauntlet | Finding Carcosa, Cthulhu Dark |
| Codex Alchemica | | May 2024 | Chaosium | Call of Cthulhu (Classic) |
| Codex Anthology * | 1 | May 2019 | The Gauntlet | Lovecraftesque |
 Coherent Light | | | Self Published | Ghostbusters, Call of Cthulhu (Classic) |
| Cohors Cthulhu Quickstart Guide | MUH0860101 | Jul 2023 | Modiphius Entertainment | Cohors Cthulhu |
| Cohors Cthulhu: Gamemaster's Toolkit | | May 2024 | Modiphius Entertainment | Cohors Cthulhu |
| Cohors Cthulhu: Tactics Prologue | MUH1500101 | May 2024 | Modiphius Entertainment | Cohors Cthulhu |
| Coin Horror | | 2015 | Self Published | Coin Horror |
| A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic) |
| Cold Harvest | CHA23143 | 2014 | Chaosium | Call of Cthulhu (Classic) |
| Cold Hunger | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| Cold Steel | | 2016 | Self Published | Lovecraftesque |
| Cold Warning | GGP1703 | 2017 | Golden Goblin Press | Call of Cthulhu (Classic) |
| A Cold Wind Blows | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) |
| Collecting Dust | | 2010 | Self Published | Call of Cthulhu (Classic) |
| Collection | | Jan 2022 | Chaosium | Call of Cthulhu (Classic) |
| Colonial Gothic: Lovecraft | RGG1699 | 2015 | Rogue Games | Colonial Gothic |
| Colonial Terrors | CHA0405 | 2011 | Chaosium | Call of Cthulhu (Strange Aeons) [1760s] |
| The Colony | | 2004 | Self Published | Call of Cthulhu (Delta Green) |
| The ColoRPG Out of Space | | 2020 | Tales By Bob | The ColoRPG Out of Space |
| The Colour Beyond Time | | 2016 | Self Published | None |
| A Colour in a Dark Age | | Oct 2019 | Chaosium | Call of Cthulhu (Dark Ages) |
| The Colour of Cattle | | Jun 2023 | Chaosium | Call of Cthulhu (Darker Trails) |
| The Colour of Money | | May 2020 | Chaosium | Call of Cthulhu (Now) |
| The Colour Out of Space | ES001 | 2024 | Dungeon Matters | Dungeons and Dragons |
| Colour Out of Space Gate Pack | CW-U07 | 2016 | Petersen Games | Cthulhu Wars |
| Come Forth and be Cured | | 2001 | Self Published | Call of Cthulhu (Classic) |
| Coming Full Circle | PAG1003 | 1995 | Pagan Publishing | Call of Cthulhu (Classic) |
| The Compact Arkham Unveiled | CHA2356 | 1995 | Chaosium | Call of Cthulhu (Classic) |
| The Compact Trail of Tsathoggua | CHA2362 | 1997 | Chaosium | Call of Cthulhu (Classic) |
| Companies and Carpools | | 2011 | Gremlin Legions | Companies and Carpools |
| The Complete Dreamlands | CHA2363 | 1997 | Chaosium | Call of Cthulhu (Dreamlands) |
| The Complete Masks of Nyarlathotep * | CHA2361 | 1996 | Chaosium | Call of Cthulhu (Classic) |
| The Complex | APU8135 | 2019 | Arc Dream Publishing | Delta Green |
| Complex 347-5 | | Mar 2024 | Chaosium | Call of Cthulhu (Now) |
| Con's Prial | | 2017 | Self Published | Con's Prial |
| Condensed Rules for Trail of Cthulhu | | 2014 | Pelgrane Press | Trail of Cthulhu |
| Conflict Resolution Deck | | 2011 | Stardust Publications | Dark Aeons |
| Confronting Hastur | DNH4 | 2018 | Fat Goblin Games | Dungeons and Dragons |
| Confronting Hastur | DNH4 | 2018 | Fat Goblin Games | OSR |
| Conspicuous Cultists | | 2023 | Self Published | Conspicuous Cultists |
| Conspiracies of Chaos | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG |
| Conspiracies of Chaos | CT14e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG |
| The Conspiracy | APU8148 | 2022 | Arc Dream Publishing | Delta Green |
| Constant Companion | | May 2023 | Chaosium | Call of Cthulhu (Strange Aeons) [1970s], Call of Cthulhu (Now) |
| Contact | | Sep 2022 | Chaosium | Call of Cthulhu (Now) |
| Control Group | APU8137 | 2019 | Arc Dream Publishing | Delta Green |
| Controlcopy | | 2016 | Self Published | Delta Green |
| Convalescence | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| Convergence | APU8150 | 2023 | Arc Dream Publishing | Delta Green |
| Convict Document Pack 1 | cr3005p | 2019 | Cthulhu Reborn | Call of Cthulhu (Convicts) |
| Convicts and Cthulhu | | 2016 | Just Crunch Games | The Cthulhu Hack |
| Convicts and Cthulhu | cr3005 | 2016 | Cthulhu Reborn | Call of Cthulhu (Convicts) |
| Cooks of Cthulhu | | 2016 | Horrible Guild | Cooks of Cthulhu |
| COREthulhu | | 2021 | Legends of Tabletop | CORE |
| Corrupting Chant | | 2016 | Epic Level NPC | Pathfinder |
| The Corruption of G'Hyr | | 1997 | Self Published | Call of Cthulhu (Classic) |
| Corsairs of Cthulhu | | 2022 | New Comet Games | Call of Cthulhu (Corsairs) |
| Corsairs of Cthulhu Map Folio | | 2022 | New Comet Games | Call of Cthulhu (Corsairs) |
| Cosa Nostra Conflagration | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| Cosmic Terrors Pack | CW-U05 | 2017 | Petersen Games | Cthulhu Wars |
| Costume Party | | Oct 2019 | Chaosium | Call of Cthulhu (Classic) |
| Cotton Eyed Joe | | Oct 2023 | Chaosium | Call of Cthulhu (Atomic) |
| Count Magnus' Descendant | | Mar 2023 | Self Published | Cthulhu Dark |
| Counterfeit Identities * | SFX3006 | 2018 | Stygian Fox | Call of Cthulhu (Now) |
| Countless Terrors Playmat | FFS77 | 2017 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Courting Madness * | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Crack'd and Crook'd Manse Extra Handouts | | Aug 2024 | Chaosium | Call of Cthulhu (Classic) |
| craigpay.com | | | Self Published | Call of Cthulhu (Classic) |
| Crawl-thulhu | 1 | Mar 2018 | Discerning Dhole Productions | Dungeon Crawl Classics |
| Crawl-thulhu | 2 | May 2019 | Discerning Dhole Productions | Dungeon Crawl Classics |
| Crawling Chaos | | 2022 | Gildor Games | Elemental |
| Crawling Chaos * | | 2022 | Gildor Games | Elemental |
| Crazed Caverns | SJG1465 | 2010 | Steve Jackson Games | Munchkin |
| The Creature Companion | CHA2375 | 1998 | Chaosium | Call of Cthulhu (Classic) |
| Creature Feature Quarterly | 1 | Aug 2018 | Self Published | Dungeons and Dragons |
| Creature Feature Quarterly | 2 | Aug 2018 | Self Published | Dungeons and Dragons |
| Creature Feature Quarterly | 3 | Nov 2018 | Self Published | Dungeons and Dragons |
| Creatures and Cultists | PAG2000 | 1992 | Pagan Publishing | None |
| Creatures and Cultists * | | 2004 | EOS Press | Creatures and Cultists |
| Creatures for Modern Horror - Book 1 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) |
| Creatures for Modern Horror - Book 2 | | Sep 2023 | RPG Gamer | Call of Cthulhu (Now) |
| Crepid Fornication | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| Criminal Enterprise | cr3005c | 2016 | Cthulhu Reborn | Call of Cthulhu (Convicts) |
| Crimson Letters Handout Pack | | Jul 2021 | Chaosium | Call of Cthulhu (Classic) |
| Crimson Letters NPCs Art Pack | | Apr 2022 | Chaosium | Call of Cthulhu (Classic) |
| Crossing Guard | | Dec 2022 | Chaosium | Call of Cthulhu (Now) |
| Crowthulhu | | 2022 | Critical Kit | Be Like a Crow |
| The Cruel Empire of Tsan Chan | CHA0397 | 2010 | Chaosium | Call of Cthulhu (Strange Aeons) [5000AD] |
| Crushed! | | Apr 2021 | Chaosium | Call of Cthulhu (Classic) |
| Crypt of Cthulhu | 89 | 1995 | Necronomicon Press | Call of Cthulhu (Classic) |
| Crypts of Concealment | SJG5519 | 2011 | Steve Jackson Games | Munchkin |
| Cryptych | 2 | Sep 1993 | ILM International | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Cryptych | 5 | 1994 | ILM International | Call of Cthulhu (Classic) |
| Cryptych | 7 | Jul 1994 | ILM International | Call of Cthulhu (Classic) |
| Cryptych | 8 | Oct 1994 | ILM International | Call of Cthulhu (Classic) |
| The Crystal Void * | MUH50189 | 2015 | Modiphius Entertainment | None |
| Cthul-B-Que | | 2008 | Invisible City Productions | Cthul-B-Que |
| A Cthulhian Miscellany | CHA0342 | 2007 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu | MIS5032 | | Misfit Studios | Mutants and Masterminds |
| Cthulhu | | 2015 | Devil Pig Games | Shadows Over Normandie |
| Cthulhu | MIS7114 | 2024 | Misfit Studios | Savage Worlds |
| Cthulhu 500 | AG1260 | 2004 | Atlas Games | Cthulhu 500 |
| The Cthulhu Alphabet | GMG4387 | 2019 | Goodman Games | None |
| Cthulhu and Co | MIS6005 | 2015 | Misfit Studios | ICONS |
| Cthulhu and Friends | | 2017 | Blue Beard Games | Dracula's Feast |
| Cthulhu and How I Found Livingstone | | 2012 | Self Published | None |
| Cthulhu and the River of Doubt | | 2007 | Book Ranger | Call of Cthulhu (Classic) |
| Cthulhu Apocalypse | PELGT40 | 2015 | Pelgrane Press | Trail of Cthulhu |
| Cthulhu Ate My Baby | PA2405 | 2024 | Schwalb Entertainment | PunkApocalyptic |
| Cthulhu Awakens | GRR6401 | 2023 | Green Ronin Publishing | Cthulhu Awakens |
| Cthulhu Awakens Game Master's Kit | GRR6403 | 2023 | Green Ronin Publishing | Cthulhu Awakens |
| Cthulhu Bandz | SJG9015A | 2011 | Steve Jackson Games | Cthulhu Dice |
| Cthulhu Boardgame | | | Self Published | [None Listed] |
| Cthulhu Boss Stats | | 2016 | 00Games | Dungeons and Dragons |
| Cthulhu Britannica | CB7350 | 2009 | Cubicle 7 | Call of Cthulhu (End Time), Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Cthulhu Britannica London: Postcards * | CB7356 | 2017 | Cubicle 7 | Call of Cthulhu (Classic) |
| Cthulhu Britannica: Folklore | CB7351 | 2012 | Cubicle 7 | Call of Cthulhu (Classic) |
| Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic) |
| Cthulhu by Gaslight * | CHA2314-X | 1986 | Chaosium | Call of Cthulhu (Gaslight) |
| Cthulhu by Gaslight * | CHA3303 | 1988 | Chaosium | Call of Cthulhu (Gaslight) |
| Cthulhu by Gaslight * | CHA23123 | 2012 | Chaosium | Call of Cthulhu (Gaslight) |
| The Cthulhu Campaigns: Ancient Rome | B01HI8M7XE | 2016 | Osprey Publishing | None |
| Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu City | PELGT44 | 2017 | Pelgrane Press | Trail of Cthulhu |
| Cthulhu Classics * | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Classics Poster | CHA9309 | | Chaosium | None |
| Cthulhu Codicil | TAG20303 | 2020 | Triple Ace Games | Leagues of Adventure |
| Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Confidential | PELGOC01 | 2016 | Pelgrane Press | Cthulhu Confidential |
| Cthulhu Confidential Sampler | PELGOC01SAMP | 2017 | Pelgrane Press | Cthulhu Confidential |
| Cthulhu Conflict | DV1-015A | 2013 | Dan Verssen Games | Hornet Leader |
| Cthulhu Covers | CHA5106 | 1988 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Crusades | | 2017 | Cthulhu Project | Cthulhu Crusades |
| Cthulhu Cubes | BGCTHULHUCUB | 2023 | Last Level | Cthulhu Cubes |
| Cthulhu Dark * | | 2010 | Self Published | Cthulhu Dark |
| Cthulhu Dark * | | 2016 | Self Published | Cthulhu Dark |
| Cthulhu Dark * | | 2017 | Self Published | Cthulhu Dark |
| Cthulhu Dark 0 | | 2016 | Self Published | Cthulhu Dark |
| Cthulhu Dark Ages | CHA2398 | 2004 | Chaosium | Call of Cthulhu (Dark Ages) |
| Cthulhu Dark Ages * | CHA23143 | 2015 | Chaosium | Call of Cthulhu (Dark Ages) |
| Cthulhu Dark Ages * | CHA23165 | 2020 | Chaosium | Call of Cthulhu (Dark Ages) |
| Cthulhu Dark Ages Guide to England | | 2012 | Unbound Publishing | Call of Cthulhu (Dark Ages) |
| Cthulhu Deckbuilder | | 2016 | Duel Grounds | Cthulhu Deckbuilder |
| Cthulhu Deep Green | | 2020 | Moth-Lands | Cthulhu Deep Green |
| Cthulhu Detective | | 2022 | Jet Games Studio | Cthulhu Detective |
| Cthulhu Dice | SJG131315A | 2010 | Steve Jackson Games | Cthulhu Dice |
| Cthulhu Dice Bag | SJG9431 | | Steve Jackson Games | Cthulhu Dice |
| Cthulhu Dice: The RPG | | 2010 | Self Published | Cthulhu Dice |
| Cthulhu Domain Statue | CT46 | | Fantasy Flight Games | Call of Cthulhu LCG |
| Cthulhu Eternal - Classic Era | cr5011 | Jun 2024 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Age of Revolutions | cr5005 | 2022 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Cold War Era | cr5004 | 2022 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Future | cr5010 | Oct 2023 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Jazz Age | cr5002 | 2022 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Medieval | cr5008 | May 2023 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Modern Age | cr5003 | 2022 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: Victorian Era | cr5001 | 2022 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: World War I | cr5009 | Sep 2023 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Eternal: World War II | cr5006 | 2023 | Cthulhu Reborn | Cthulhu Eternal |
| Cthulhu Expansion | | 2017 | Titan Forge Games | Lobotomy |
| Cthulhu Fluxx | LOO-052 | 2012 | Loony Labs | Fluxx |
| Cthulhu for President | CHA5113 | 1996 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu For President | CHA0091 | 2004 | Chaosium | BEER |
| Cthulhu for President Campaign Kit | CHA5109 | 1992 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Fu | | 2011 | Blue Kabuto | Cthulhu Fu |
| Cthulhu Gloom | AG1330 | 2011 | Atlas Games | Gloom |
| The Cthulhu GM's Nefarious Tentacle | BSE-1006 | 2015 | Black Shark Enterprises | None |
| Cthulhu God Promo | | 2021 | Awaken Realms | Flick of Faith |
| Cthulhu Grey | | 2012 | Self Published | Cthulhu Grey |
| Cthulhu Grim | | 2016 | Self Published | Cthulhu Grim |
| The Cthulhu Hack | JCG007 | 2016 | Just Crunch Games | The Cthulhu Hack |
| Cthulhu Hack * | JCG200 | 2023 | Just Crunch Games | The Cthulhu Hack |
| The Cthulhu Hack Boxed Set * | | 2016 | Just Crunch Games | The Cthulhu Hack |
| Cthulhu Hardboiled Campaign | | | Self Published | Call of Cthulhu (Classic) |
| Cthulhu How? | | 2013 | Self Published | None |
| Cthulhu in 2012 Campaign Bus | | 2012 | Atlas Games | Cthulhu 500 |
| Cthulhu in Space | | 2014 | Starbright Illustrations | Fate of Cthulhu |
| Cthulhu in the House | | 2016 | Cool Mini Or Not | Cthulhu in the House |
| Cthulhu Insanity Dice | | 2016 | Dark Cult Games | None |
| Cthulhu Introduction Pack * | CHA2382 | 1999 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus | CHA0301 | 2004 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus * | CHA23115 | 2009 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus Companion | CHA23119 | 2011 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus Keeper's Screen | GGP | 2018 | Golden Goblin Press | Call of Cthulhu (Invictus) |
| Cthulhu Invictus: Bestiae | BESTIAE_PDF | 2010 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus: Britannia and Beyond | GGP2301 | 2023 | Golden Goblin Press | Call of Cthulhu (Invictus) |
| Cthulhu Invictus: Fabulae | FABULAE_PDF | 2010 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus: Patrocinium | PATROCINIUM_PDF | 2010 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Invictus: Populus | POPULUS_PDF | 2010 | Chaosium | Call of Cthulhu (Invictus) |
| Cthulhu Island | | 2020 | Cortadoo Games | Cthulhu Island |
| Cthulhu Kids: Cosmic Catastrophe * | | 2019 | Unknown | Cthulhu Kids: Cosmic Catastrophe |
| Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Live * | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic) |
| Cthulhu Live * | SKP0602 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) |
 Cthulhu Live Companion * | SKP0604 | 2006 | Skirmisher Publishing | Call of Cthulhu (Classic) |
| Cthulhu Live: Delta Green | 0007 | 2001 | Fantasy Flight Games | Call of Cthulhu (Delta Green) |
| Cthulhu Live: Lost Souls | 0005 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) |
| Cthulhu Live: Player's Companion | 0006 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) |
| Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic) |
| Cthulhu Loves Sushis | | 2014 | Sit Down! | Sushi Dice |
| Cthulhu Madness: Midnight in the Graveyard | | 2014 | Hamster Press | Cthulhu Madness: Midnight in the Graveyard |
| Cthulhu Map Pack 2 | | 2021 | RPG Marshal | None |
| Cthulhu Maps - A Bookstore of the Occult | 063 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Botanical Garden | 090 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Boxing Club | 084 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Bridge to the Village | 072 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Camp in Antarctica | 003 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Cemetery in the Fog | 011 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A City Police Station | 015 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Cosmic Art Gallery | 054 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Cosmic Temple | 074 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Cottage in the Orchard | 096 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Country Airfield | 002 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Country Inn | 086 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Country Village | 014 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Cultist Headquarter | 022 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Dark Forest | 027 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Diner on the Road | 095 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Harlem Speakeasy | 092 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A House in London | 061 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A House on the Cliff | 043 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Lobster Factory | 021 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Lost Chapel | 009 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Lost Home | 079 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Medina in the Desert | 019 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Museum of Natural History | 018 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Mysterious House | 097 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Mysterious Lighthouse | 006 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Night in a Club | 044 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Park in the City | 023 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Riad in the Desert | 016 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Secret Bunker | 036 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Secret Lab | 046 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Shrine Under the Sea | 013 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Smuggler's Cave | 085 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Submarine in the Depths | 057 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Tibetan Monastery | 073 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Train Station | 049 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Warehouse on the Docks | 067 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Waterfall in the Jungle | 035 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Wilderness Camp | 099 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - A Zeppelin Travelling the World | 004 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Alone on the Lake | 065 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Apartment I | 076 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Apartment II | 078 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Evening at the Theater | 008 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Excavation Site | 047 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Hostel on the Beach | 020 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Industrial Harbor | 017 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Observatory in the Mountains | 048 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Abandoned Manor | 001 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Country Domain | 062 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Country Farm | 012 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Covered Bridge | 083 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Dam and a Sewer System | 042 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Mine | 041 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Old Train | 005 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - An Opium Den | 075 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Arkham Asylum | 010 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Autopsy Department | 098 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Beyond the Mountains of Madness | | Jan 2024 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - Bridge over Troubled Water | 081 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Bus Trouble | 070 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Crash: A New Beginning | 037 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - DC-3 in Distress | 033 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Dead Light and Other Dark Turns | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - Explorers on the Moon | 089 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Halloween Freakshow | | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Happy New Year 2022 * | | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Horror in the Trenches | 087 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - In The Orient Express I | 093 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - In The Orient Express II | 094 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Innsmouth Harbor | 025 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - King in Yellow in Carcosa | 050 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch1 - New York Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch2 - London Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch3 - Cairo Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch4 - Kenya Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch5 - Australia Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - ch6 - Shanghai Pack | | Mar 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - Meeting Tables | | Dec 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Masks of Nyarlathotep - Prologue - Peru Pack | | Apr 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Panic in the Building | 040 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Pursuit in a Lost Village | 051 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Pursuit in New York | 045 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Pursuit on the Canal | 064 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Scenario Map Pack - Gateways to Terror | | Mar 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Scenario Map Pack - Reign of Terror | | Feb 2022 | Lovemaps | Call of Cthulhu (Strange Aeons) |
| Cthulhu Maps - Servants of the Lake | | Jun 2022 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - Starter Pack - City I | | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tatters of the King - Book 1 | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tatters of the King - Book 2 and 3 | | Jan 2023 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tatters of the King - prologue | | Nov 2022 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Maps - The "4" Base in Antarctica | 059 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Abbey of Fear | 091 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Blue Mermaid Ocean Liner | 030 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Buddha Cave | 058 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Chelsea Hotel | 052 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Dinner of Horrors | 056 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Dolmens Clearing | 007 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Field of Stones | 053 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Gardner Farm | 071 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Great Carcosa | 066 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Launch | 088 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Library of Celaeno | 077 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Lost Ziggurat | 026 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Miskatonic Auditorium | 055 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Miskatonic Library | 029 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Parade of Ghouls | 024 | 2021 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Peacock Cargo Ship | 031 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Residence of Mr Finkle | 028 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Temple of Dagon | 060 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch1 - Bolivia | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch2 - New York | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch3 - Borneo | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch4 - Oklahoma | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch5 - Iceland | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch6 - Belgian Congo | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch7 - Calcutta | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch8 - Snake Island | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Two-Headed Serpent - Ch9 - Mu | | Jun 2024 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Voodoo House | 034 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The White Chapel | 082 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - The Windmill of Hell | 032 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Throne of Nyarlathotep | 100 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tomb of Nephren-Ka: Burial Chamber | 039 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tomb of Nephren-Ka: Temple | 038 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Tremors at the Farms | 080 | 2023 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Verdict in Court | 069 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps - Welcome to the World's Fair | 068 | 2022 | Lovemaps | Call of Cthulhu (Classic) |
| Cthulhu Maps Pack | | 2021 | RPG Marshal | None |
| Cthulhu Mash | EPB-CM1 | 2003 | Evil Polish Brothers | Cthulhu Mash |
| Cthulhu Mask Promo Card | | 2009 | Steve Jackson Games | Chez Cthulhu |
| Cthulhu Masters Tournament 2005 | CHA0323 | 2005 | Chaosium | Call of Cthulhu (Strange Aeons) [1960s], Call of Cthulhu (WWII), Call of Cthulhu (Classic) |
| Cthulhu Modern: Beyond the Door | | Jun 2022 | Chaosium | Call of Cthulhu (Now) |
| Cthulhu Mythos | GRR6107 | 2024 | Green Ronin Publishing | Fantasy AGE |
| Cthulhu Mythos Call 1 | | 2015 | Devil Pig Games | Shadows Over Normandie |
| Cthulhu Mythos Call 2 | | 2016 | Devil Pig Games | Shadows Over Normandie |
| Cthulhu Mythos Call 3 | | 2018 | Devil Pig Games | Shadows Over Normandie |
| Cthulhu Mythos Call 4 | | 2019 | Devil Pig Games | Shadows Over Normandie |
| The Cthulhu Mythos of H P Lovecraft | | 2006 | Self Published | Eldritch Skies |
| Cthulhu Nights | | 2019 | Micro RPG | Cthulhu Nights |
| Cthulhu Nights Deluxe Edition | | 2021 | Micro RPG | Cthulhu Nights |
| Cthulhu Now | CHA2322 | 1987 | Chaosium | Call of Cthulhu (Now) |
| Cthulhu Now * | CHA3307 | 1992 | Chaosium | Call of Cthulhu (Now) |
| Cthulhu Obscura | | 2021 | Self Published | Cthulhu Obscura |
| Cthulhu Playmat | | 2019 | Powerplant Games | Arkham Horror: The Card Game |
| Cthulhu Pulp | | 2010 | Planet Pulp Productions | Pulp Adventure |
| Cthulhu Quest | | 2011 | Warp Spawn Games | Cthulhu Quest |
| Cthulhu Realms | TTT3007 | 2015 | Tasty Minstrel Games | Cthulhu Realms |
| The Cthulhu Relics | | 2018 | Holy Grail Games | Museum |
| Cthulhu Rises | | 2018 | Excalibre Games | Mythic Wars |
| Cthulhu Rises!! | CR0001 | 2023 | Dark One Games | Cthulhu Rises!! |
| Cthulhu Rising | CAO1302-1 | 1996 | Chaosium | Mythos |
| Cthulhu Rising | CHA0311 | 2005 | Chaosium | Call of Cthulhu (Rising) |
| Cthulhu Rising | | 2008 | Twilight Creations | Cthulhu Rising |
| Cthulhu Risus | | 2007 | Self Published | Cthulhu Risus |
| Cthulhu Roadshow | | Feb 2021 | Chaosium | Call of Cthulhu (Now) |
| Cthulhu Saves the World | | 2017 | Self Published | JumpChain! |
| Cthulhu Skirmish | | 2005 | Warp Spawn Games | Cthulhu Skirmish |
| Cthulhu Tales | | 2016 | Cubicle 7 | Cthulhu Tales |
| Cthulhu Through the Ages | CHA23146 | 2014 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu Unleashed | | Mar 2024 | Vindicta RPGs | Cthulhu Unleashed |
| Cthulhu Vice | | 2009 | Self Published | Savage Worlds |
| Cthulhu Wars | PETCTHU01 | 2015 | Petersen Games | Cthulhu Wars |
| Cthulhu Wars 1st Edition Upgrade Kit | CW-E11 | | Petersen Games | Cthulhu Wars |
| Cthulhu Wars Duel | | 2020 | Petersen Games | Cthulhu Wars (Duel) |
| The Cthulhu Wars: The United States' Battles Against the Mythos | DARK 11 | 2016 | Osprey Publishing | None |
| Cthulhu Within | | 2020 | Self Published | Call of Cthulhu (Classic) |
| Cthulhu Zap | | 2011 | Self Published | Cthulhu Zap |
| Cthulhu!!!: Hastur La Vista, Baby! | TLC2500 | 2014 | Twilight Creations | Cthulhu!!!: Hastur La Vista, Baby! |
| Cthulhu's Dark Cults * | CHA6044 | 2010 | Chaosium | Call of Cthulhu (Classic) |
| Cthulhu's Domain | | | Self Published | Mythos |
| Cthulhu's Vault | | 2015 | Jolly Roger Games | Cthulhu's Vault |
| Cthulhu: A Deck Building Game | | 2016 | Wyvern Gaming | Cthulhu: A Deck Building Game |
| Cthulhu: A Deck Building Game Playmat | | 2019 | Wyvern Gaming | Cthulhu: A Deck Building Game |
| Cthulhu: Age of Madness | | 2022 | Strange Aeon Games | Cthulhu: Age of Madness |
| Cthulhu: Dark Providence | | 2023 | CMON Limited | A Study in Emerald |
| Cthulhu: Death May Die | DMD001 | 2019 | CMON Limited | Cthulhu: Death May Die |
| Cthulhu: Death May Die Extra Dice | | 2019 | CMON Limited | Cthulhu: Death May Die |
| Cthulhu: Rise of the Cults | | 2017 | Redimp Games | Cthulhu: Rise of the Cults |
| Cthulhu: The Great Old One | | 2014 | Dann Kriss Games | Cthulhu: The Great Old One |
| Cthulhu: The Great Old One - Deluxe Edition | | 2019 | Dann Kriss Games | Cthulhu: The Great Old One |
| Cthulhu: The Harbinger | | 2020 | Petersen Games | Cthulhu Wars |
| Cthulhu: The Horror in Dunwich | WYG005 | 2019 | Wyvern Gaming | Cthulhu: The Horror in Dunwich |
| Cthulhu: The Horror in Dunwich Playmat | | 2019 | Wyvern Gaming | Cthulhu: The Horror in Dunwich |
| Cthulhu: Tora! Tora! Tora! | | 2008 | Self Published | Cthulhu: Tora! Tora! Tora! |
| Cthulhu: Xothic Wars | | 2017 | GobboTown Games | Cthulhu: Xothic Wars |
| Cthulhulike | | 2002 | Arc Dream Publishing | Godlike |
| Cthulhupunk | SJG01695 | 1995 | Steve Jackson Games | GURPS (CthulhuPunk) |
| CthulhuTech | WDF23000 | 2007 | WildFire Games | CthulhuTech |
| CthulhuTech GM Reference Screen | WDF23610 | 2010 | WildFire Games | CthulhuTech |
| CthulhuTech Quick Start Rules | | 2009 | WildFire Games | CthulhuTech |
| Cthulinaria | | 2009 | Invisible City Productions | Cthulinaria |
| Cthully * | | 2021 | Ludus Magnus Studio | Black Rose Wars |
| Cthuloid Bestiary: Lovecraftian Monsters of OSR Games | | 2014 | Self Published | Advanced Dungeons and Dragons |
| Cthuot-Id | MIS5053 | 2015 | Misfit Studios | Mutants and Masterminds |
| Cult Cards Promo | | 2017 | Greater Than Games | Fate of the Elder Gods |
| Cult Membership Card Promo Card | | Nov 2013 | Steve Jackson Games | Munchkin |
| Cult of Cathulhu | | 2023 | Self Published | Cult of Cathulhu |
| Cult of Chaos | | 2024 | Gamelyn Games | Tiny Epic Cthulhu |
| The Cult of Gl'thol'tic | | May 2023 | Chaosium | Call of Cthulhu (Classic) |
| Cult of the Colour out of Space | | 2015 | Wayward Rogues Publishing | Pathfinder |
| Cult of the Deep | | 2022 | B A Games | Cult of the Deep |
| Cult of the Golden Scarab | | 2007 | Self Published | Arkham Horror |
| Cult of the Wendigo | | 2018 | Wayward Rogues Publishing | Pathfinder |
| CULT! An Elder Beings Apocalypse Role Playing Game | | 2016 | Zombie Dog Games | CULT! |
| Cultic Set 1 | | 2019 | Petersen Games | Evil High Priest |
| Cultic Set 2 | | 2019 | Petersen Games | Evil High Priest |
| Cultic Set 3 | | 2019 | Petersen Games | Evil High Priest |
| The Cultist | AGG0027 | 2015 | Awful Good Games | Dungeon World |
| Cultist (Goomi) Promo Card | | Mar 2009 | Steve Jackson Games | Munchkin |
| Cultist (Kovalic) Promo Card | | Mar 2009 | Steve Jackson Games | Munchkin |
| Cultist/Occultist * | | 2020 | Broken Things | Cultist/Occultist |
| Cultistorm | | 2019 | Purple Meeple Games | Cultistorm |
| Cultistorm: Face 2 Face | | 2019 | Purple Meeple Games | Cultistorm |
| Cultists and Cthulhu | PLF500 | 2016 | Prolific Games | Cultists and Cthulhu |
| Cultists and Cthulhu | PLF510 | 2024 | Prolific Games | Cultist and Cthulhu [2] (Cultist and Cthulhu) |
| Cultists in the Keep * | | 2017 | Self Published | None |
| Cultists of Cthulhu | | 2016 | Sixpence Games | Cultists of Cthulhu |
| Cultists Under the Bed | CB71206 | 2013 | Cubicle 7 | Call of Cthulhu (Laundry) |
| Cults Across America | | 1998 | Atlas Games | Cults Across America |
| Cults of Arkham | | 2014 | Initiativet | Cults of Arkham |
| Cults of Cthulhu | CHA23177 | 2021 | Chaosium | Call of Cthulhu (Classic) |
| Cults of Dagon | | 2017 | Self Published | Cults of Dagon |
| Cults of Freeport | GRR1905e | 2007 | Green Ronin Publishing | None |
| Curio | | Dec 2022 | Chaosium | Call of Cthulhu (Classic) |
| Curious Calibres | | 2011 | Drakat Games | Call of Cthulhu (Classic) |
| The Curious Case of Spaceship Kontula | | 2022 | Self Published | None |
| Curious Character Deck | CHA23139-KD2 | 2016 | Chaosium | Call of Cthulhu (Classic) |
| Curious Characters Deck * | CHA23184-KD2 | Sep 2024 | Chaosium | Call of Cthulhu (Classic) |
| Curious Things Art Pack | | Dec 2017 | Chaosium | Call of Cthulhu (Classic) |
| The Curse * | | 1990 | ADP Systems | Call of Cthulhu (Classic) |
| The Curse of Black Teeth Keetes | | Aug 2021 | Chaosium | Call of Cthulhu (Classic) |
| Curse of Cthulhu * | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic) |
| The Curse of Dudleytown | | Aug 2020 | Chaosium | Call of Cthulhu (Strange Aeons) [1811] |
| The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic) |
| The Curse of Punk | | Apr 2024 | Chaosium | Call of Cthulhu (Now) |
| Curse of the Chthonians * | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic) |
| Curse of the Chthonians * | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic) |
| Curse of the Dark Pharaoh | VA33 | 2006 | Fantasy Flight Games | Arkham Horror |
| The Curse of the Dark Pharaoh * | VA78 | 2011 | Fantasy Flight Games | Arkham Horror |
| Curse of the Jade Emperor | CT48 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG |
| Curse of the Rougarou * | uACH09 | 2016 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Curse of the Yellow Sign | | 2015 | John Wick Presents | Call of Cthulhu (Classic) |
| Curse of the Yellow Sign Act 1: Digging for a Dead God | 1 | 2009 | Wicked Dead Brewing | Call of Cthulhu (Classic) |
| Curse of the Yellow Sign Act 2: Calling the King | 2 | 2009 | Wicked Dead Brewing | Call of Cthulhu (Classic) |
| Curse of the Yellow Sign Act 3: Archimedes 7 | 3 | 2010 | Wicked Dead Brewing | Call of Cthulhu (Classic) |
| The Curse of Whately Manor * | | 1992 | Society of Interactive Drama | None |
| Cursed | | Jul 2022 | Chaosium | Call of Cthulhu (Now) |
| Cursed to Life | | May 2024 | Chaosium | Call of Cthulhu (Darker Trails) |
| Curserd Captains of Cthulhu Quick Start | P12 | 2021 | Black Cats Gaming | d6 |
| Custom Dice | CW-E03 | 2013 | Petersen Games | Cthulhu Wars |
| Cyber-Cthulhu | | 2014 | Starbright Illustrations | Fate of Cthulhu |
| CYOA Pointing Guide | | | Self Published | Mythos |