| Title | Code | Date | Publisher | System (Setting) |
|---|
 1-2-3 Cthulhu | | 2005 | Self Published | 1-2-3 Cthulhu |
| 12 Hours | | 2002 | Self Published | Call of Cthulhu (Strange Aeons) [2055] |
| 1st Job | | 2008 | Self Published | Yellow Dawn |
| 20 Encounters in the Ruins of the Elder Beings | | 2016 | Self Published | Call of Cthulhu (Classic) |
| 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| The A-Tech | | 2011 | Self Published | CthulhuTech |
| The Abbadon Key | SM04 | 2007 | Self Published | Call of Cthulhu (Rising) |
| The Abominable Snowman | | | Self Published | Mythos |
| Absinthe Waves | | 2016 | Self Published | Lovecraftesque |
| Across the Fence | | | Self Published | Call of Cthulhu (Delta Green) |
| Adventure Repoint | | | Self Published | Mythos |
| The Advisor | | 2011 | Self Published | CthulhuTech |
| Aeon Angelus Necronomicon: Evolution | | Mar 2008 | Self Published | CthulhuTech |
| Aftershock | | 2013 | Self Published | Call of Cthulhu (Delta Green) |
| The Ages of Man | | 2008 | Self Published | Call of Cthulhu (Now) |
 Alarums and Excursions | 429 | Jul 2011 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 486 | Apr 2016 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 488 | Jun 2016 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 491 | Sep 2016 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 493 | Nov 2016 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 506 | Dec 2017 | Self Published | Trail of Cthulhu |
| Alarums and Excursions | 507 | Jan 2018 | Self Published | Trail of Cthulhu |
| All Hallows' Eve | | 2012 | Self Published | Call of Cthulhu (Now) |
| The Almanac of the Mad and Macabre | | 2023 | Self Published | None |
| Alone Against the Mythos | | | Self Published | Mythos |
| Alone Against the Tide | | Jun 2018 | Self Published | Call of Cthulhu (Classic) |
| Alphonse's Axioms for Agents | | 2013 | Self Published | Call of Cthulhu (Delta Green) |
 Amulet | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| Androids | | 2006 | Self Published | Call of Cthulhu (Rising) |
| Anime-Punk Cthulhu | | May 2018 | Self Published | Call of Cthulhu (Cyberpunk) |
 Annai Enterprises | | | Self Published | Call of Cthulhu (Classic) |
| Annwn | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
 Antarctica | | | Self Published | Mythos |
| Apathy: The Calling | | 2008 | Self Published | Apathy |
| Apollo 20 | | 2017 | Self Published | Delta Green |
| Arbalest | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Arcane Scholar | | 2011 | Self Published | CthulhuTech |
| Arkham Electric Bill | | Jan 2018 | Self Published | Call of Cthulhu (Classic) |
 Arkham Express | | 2010 | Self Published | Arkham Express |
| Arkham Investigator | | 2013 | Self Published | Arkham Investigator |
| Army of Five Eyes | | 2016 | Self Published | Barbarians of Lemuria |
 The Art of Madness | | 1987 | Self Published | Call of Cthulhu (Classic) |
| As Good as a Feast * | | | Self Published | Cthulhu Dark |
| The Ascension of Hastorang | | 2001 | Self Published | Call of Cthulhu (Strange Aeons) [1962] |
| Assault on Innsmouth | | 2009 | Self Published | Chain Reaction |
| At the Mountain Village | | Jul 2018 | Self Published | Call of Cthulhu (Classic) |
| At the Mountains of Madness | | 2017 | Self Published | Labyrinth Lord (Mutant Future) |
| Attack on R'lyeh | | 2023 | Self Published | Attack on R'lyeh |
| Autumn Whispers and Winter Callings | | 2017 | Self Published | Call of Cthulhu (Classic) |
| The Avant Gardiste | | 2011 | Self Published | CthulhuTech |
| Azathoth | | 2023 | Self Published | Azathoth |
| Azzurrina is Missing | | May 2023 | Self Published | Call of Cthulhu (Delta Green) |
| The Bad Place | | 2003 | Self Published | Call of Cthulhu (Now) |
| Balrog Banter | 4 | 1986 | Self Published | Call of Cthulhu (Classic) |
| Baruch's Burden | | 2009 | Self Published | Yellow Dawn |
| Beast | | 2014 | Self Published | Cthulhu Dark |
| Beast of Bladenboro | | 2016 | Self Published | Lovecraftesque |
| Beltaine and the Beast | | 2016 | Self Published | Call of Cthulhu (Classic) |
| The Bet | | 2001 | Self Published | Call of Cthulhu (Classic) |
| Bile Weed | | 2009 | Self Published | Yellow Dawn |
| Bitter Wind | | 2002 | Self Published | Call of Cthulhu (End Time) |
| Black Gold | | 2020 | Self Published | Call of Cthulhu (Delta Green) |
| Black Light | | 2019 | Self Published | Index Card RPG |
| The Black Mine of Teihiihan | | May 2019 | Self Published | GURPS, Call of Cthulhu (Darker Trails) |
| Black Mole | 3 | 1990 | Self Published | Call of Cthulhu (Classic) |
| Black Mole | 5 | 1991 | Self Published | Call of Cthulhu (Classic) |
| Black Stars Rise | | 2013 | Self Published | Apocalypse World |
| Black Static Transmission | | 2004 | Self Published | Call of Cthulhu (Now) |
| The Black Stone | | 1999 | Self Published | Call of Cthulhu (Classic) |
| The Blasphemous Tome | 8 | Dec 2021 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now), Call of Cthulhu (Darker Trails) |
| The Blasphemous Tome | 1 | Mar 2016 | Self Published | Call of Cthulhu (Classic) |
| The Blasphemous Tome | 2 | Feb 2017 | Self Published | Call of Cthulhu (Now) |
| The Blasphemous Tome | 3 | Dec 2017 | Self Published | None, Call of Cthulhu (Classic) |
| The Blasphemous Tome | 4 | Dec 2018 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| The Blasphemous Tome | 4.5 | Jun 2019 | Self Published | None, Call of Cthulhu (Now) |
| The Blasphemous Tome | 5 | Dec 2019 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| The Blasphemous Tome | 5.5 | Aug 2020 | Self Published | None, Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| The Blasphemous Tome | 6 | Dec 2020 | Self Published | Call of Cthulhu (WWII) |
| The Blasphemous Tome | 7 | Jun 2021 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| The Blasphemous Tome | 9 | Jun 2022 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now) |
| The Blasphemous Tome | 10 | Nov 2022 | Self Published | Call of Cthulhu (Now) |
| The Blasphemous Tome | 11 | Nov 2023 | Self Published | Call of Cthulhu (Classic) |
| The Blasphemous Tome | 12 | Jul 2024 | Self Published | Call of Cthulhu (Classic) |
| Blood Will Out | | 2016 | Self Published | Lovecraftesque |
| The Blue Stone | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Blurred Vision | 1 | 1985 | Self Published | Call of Cthulhu (Classic), None |
| The Bog | | 1999 | Self Published | Call of Cthulhu (Classic) |
| The Bone Dealers | | 2001 | Self Published | Call of Cthulhu (Now) |
| Books and Bullets | | 2019 | Self Published | Books and Bullets |
| The Bookstore | | 2001 | Self Published | Call of Cthulhu (Now) |
| Boris | 1 | 1985 | Self Published | Call of Cthulhu (Classic) |
| The Boss | | 2011 | Self Published | CthulhuTech |
| Bottom of the World | | Dec 2023 | Self Published | Achtung! Cthulhu |
| Breakout Day | | 2007 | Self Published | Breakout Day |
| Breath Of Life | | 2016 | Self Published | Lovecraftesque |
| Bringing New Life | | 2016 | Self Published | Lovecraftesque |
| Bristol Consortium | | | Self Published | Call of Cthulhu (Delta Green), Call of Cthulhu (Now) |
| The Brunholt Head | | 2002 | Self Published | Call of Cthulhu (Now) |
| Bubbles and Troubles | | 2011 | Self Published | Cthulhu Dark |
| The Bubonic Plagiarist | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Bubonic Plagiarist | 2 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Bubonic Plagiarist | 3 | 1987 | Self Published | Call of Cthulhu (Classic) |
| Builders of R'lyeh | | 2012 | Self Published | Builders of R'lyeh |
| A C-Tech Primer | | 2011 | Self Published | CthulhuTech |
| Call of Cthulhu Survival Tips | | 2002 | Self Published | Call of Cthulhu (Classic) |
| The Call of the Necronomicon | | 2013 | Self Published | Fiasco Classic |
| Campus Crusade for Cthulhu | | | Self Published | Call of Cthulhu (Now) |
| Canyon of the Snow Cairns | | May 2020 | Self Published | Call of Cthulhu (Strange Aeons) [Ice Age], Savage Worlds, GURPS |
| Carcosa | | 2008 | Self Published | Dungeons and Dragons |
| A Carcosa Fringe Festival | | 2019 | Self Published | The Cthulhu Hack |
| The Cards of Cthulhu (print and play) * | | 2012 | Self Published | The Cards of Cthulhu |
| The Case * | | 2021 | Self Published | The Case |
| Castaway Island | | 2005 | Self Published | Call of Cthulhu (Now) |
| Catch of the Day | | 2016 | Self Published | Lovecraftesque |
| Cerebretron | 3 | Mar 1987 | Self Published | Call of Cthulhu (Dreamlands) |
| The Chaos Iteration | FS02 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Charlie Don't Surf | | 1997 | Self Published | Call of Cthulhu (Strange Aeons) [1969] |
| The Children of Atlach-Nacha | | 2015 | Self Published | Delta Green |
| Chthonian | | 2001 | Self Published | Chthonian |
| The Clan | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Clean Up, Aisle Four! | | 2004 | Self Published | Call of Cthulhu (Now) |
| Coherent Light | | | Self Published | Call of Cthulhu (Classic), Ghostbusters |
| Coin Horror | | 2015 | Self Published | Coin Horror |
| Cold Steel | | 2016 | Self Published | Lovecraftesque |
| Collecting Dust | | 2010 | Self Published | Call of Cthulhu (Classic) |
| The Colony | | 2004 | Self Published | Call of Cthulhu (Delta Green) |
| The Colour Beyond Time | | 2016 | Self Published | None |
| Come Forth and be Cured | | 2001 | Self Published | Call of Cthulhu (Classic) |
| Con's Prial | | 2017 | Self Published | Con's Prial |
| Conspicuous Cultists | | 2023 | Self Published | Conspicuous Cultists |
| Controlcopy | | 2016 | Self Published | Delta Green |
| The Corruption of G'Hyr | | 1997 | Self Published | Call of Cthulhu (Classic) |
| Count Magnus' Descendant | | Mar 2023 | Self Published | Cthulhu Dark |
| craigpay.com | | | Self Published | 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 |
| Cthulhu and How I Found Livingstone | | 2012 | Self Published | None |
| Cthulhu Boardgame | | | Self Published | Cthulhu Boardgame |
| Cthulhu Dark * | | 2010 | Self Published | Cthulhu Dark |
 Cthulhu Dark * | | 2017 | Self Published | Cthulhu Dark |
| Cthulhu Dark * | | 2016 | Self Published | Cthulhu Dark |
| Cthulhu Dark 0 | | 2016 | Self Published | Cthulhu Dark |
| Cthulhu Dice: The RPG | | 2010 | Self Published | Cthulhu Dice |
| Cthulhu Grey | | 2012 | Self Published | Cthulhu Grey |
| Cthulhu Grim | | 2016 | Self Published | Cthulhu Grim |
| Cthulhu Hardboiled Campaign | | | Self Published | Call of Cthulhu (Classic) |
| Cthulhu How? | | 2013 | Self Published | None |
| The Cthulhu Mythos of H P Lovecraft | | 2006 | Self Published | Eldritch Skies |
| Cthulhu Obscura | | 2021 | Self Published | Cthulhu Obscura |
| Cthulhu Risus | | 2007 | Self Published | Cthulhu Risus |
| Cthulhu Saves the World | | 2017 | Self Published | JumpChain! |
| Cthulhu Vice | | 2009 | Self Published | Savage Worlds |
| Cthulhu Within | | 2020 | Self Published | Call of Cthulhu (Classic) |
| Cthulhu Zap | | 2011 | Self Published | Cthulhu Zap |
| Cthulhu's Domain | | | Self Published | Mythos |
| Cthulhu: Tora! Tora! Tora! | | 2008 | Self Published | Cthulhu: Tora! Tora! Tora! |
| Cthuloid Bestiary: Lovecraftian Monsters of OSR Games | | 2014 | Self Published | Advanced Dungeons and Dragons |
| Cult of Cathulhu | | 2023 | Self Published | Cult of Cathulhu |
| Cult of the Golden Scarab | | 2007 | Self Published | Arkham Horror |
| Cultists in the Keep * | | 2017 | Self Published | None |
| Cults of Dagon | | 2017 | Self Published | Cults of Dagon |
| The Curious Case of Spaceship Kontula | | 2022 | Self Published | None |
| CYOA Pointing Guide | | | Self Published | Mythos |
| D20 Call of Cthulhu Lite | | 2003 | Self Published | Call of Cthulhu (d20) |
| Dagon | 1 | Nov 1983 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 10 | Nov 1985 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic), None |
| Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic), None |
| Dagon | 13 | Jun 1986 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 14 | Sep 1986 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 15 | Nov 1986 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 16 | Jan 1987 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 17 | Apr 1987 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 18,19 | Jul 1987 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 2 | Feb 1984 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 20 | Nov 1987 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 21 | Mar 1988 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 22,23 | Sep 1988 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 24 | Jan 1989 | Self Published | Call of Cthulhu (Gaslight) |
| Dagon | 25 | Jun 1989 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 27 | Jun 1990 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 3 | Aug 1984 | Self Published | Call of Cthulhu (Gaslight), Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Dagon | 4 | Oct 1984 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 5 | Jan 1985 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 6 | Mar 1985 | Self Published | Call of Cthulhu (Strange Aeons) [1940], Call of Cthulhu (Classic), Call of Cthulhu (Dreamlands) |
| Dagon | 7 | May 1985 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 8 | Jul 1985 | Self Published | Call of Cthulhu (Classic) |
| Dagon | 9 | Sep 1985 | Self Published | Call of Cthulhu (Classic) |
| Dagon's Bones | | 2018 | Self Published | Dagon's Bones |
| The Damp Man | | 1999 | Self Published | Call of Cthulhu (Now) |
| Danse Macabre | 2 | 1985 | Self Published | PBM Call of the Cultists |
| Dark Depths | | 2011 | Self Published | Cthulhu Dark |
| The Dark Gulf of N'kai | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Delta Green) |
| Dark Island | | 1999 | Self Published | Call of Cthulhu (Now) |
| The Dark Planet: Round 1 | | 2004 | Self Published | Call of Cthulhu (Classic) |
| The Dark Planet: Round 2 | | 2004 | Self Published | Call of Cthulhu (Classic) |
| Dark Secrets | | 2016 | Self Published | Rise of Cthulhu |
| Dark Tales | | 2011 | Self Published | Cthulhu Dark |
| The Dark Times | 1 | Aut 2017 | Self Published | Call of Cthulhu (Now), Dark Conspiracy, Trail of Cthulhu, Call of Cthulhu (Delta Green) |
| The Dark Times | 2 | Jan 2018 | Self Published | Call of Cthulhu (Classic), None, Trail of Cthulhu |
| The Dark Times | 3 | May 2018 | Self Published | None |
| The Dark Times | 4 | Feb 2019 | Self Published | Trail of Cthulhu |
| Dark Trail | | 2013 | Self Published | GUMSHOE |
| Darkship | | 2021 | Self Published | Cthulhu Dark, Mothership |
| The Daughter of Set | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Dead Ashes Burn Again | | 2016 | Self Published | Lovecraftesque |
| Dead Dogs and Black Roots | | 2004 | Self Published | Call of Cthulhu (Classic) |
| Dead Elf | 4 | 1985 | Self Published | Call of Cthulhu (Classic) |
| A Death in the Family | | 1992 | Self Published | Call of Cthulhu (Now) |
| The Death of Sherlock Holmes | | 2006 | Self Published | Call of Cthulhu (Gaslight) |
| The Death of Simon Michaels | | 1997 | Self Published | Call of Cthulhu (Delta Green) |
| Deep Commitments | | | Self Published | [None Listed] |
| Deep Water | | 2010 | Self Published | Call of Cthulhu (Delta Green) |
| Deep, Once | | 2019 | Self Published | The Cthulhu Hack |
| Delta Dark | | 2013 | Self Published | Cthulhu Dark |
| Delta Green Anomalies | | | Self Published | Call of Cthulhu (Delta Green) |
| Delta Green Plausible Deniability | | | Self Published | Call of Cthulhu (Delta Green) |
| Delta Green/ITS Crossover 1.0 | | 2001 | Self Published | Call of Cthulhu (Delta Green), Into the Shadows |
| Demon of Catheway | | 1996 | Self Published | Call of Cthulhu (Now) |
| Demonground | 10 | Aut 2000 | Self Published | Call of Cthulhu (Classic) |
| Demonground | 11 | Mar 2001 | Self Published | Call of Cthulhu (Now) |
| Demonground | 12 | Jun 2001 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Demonground | 15 | Sep 2002 | Self Published | Call of Cthulhu (Now) |
| Demonground | 9 | Sum 2000 | Self Published | Call of Cthulhu (Now) |
| Descending Darkness | 1 | 1986 | Self Published | Call of Cthulhu (Classic) |
| Descending Darkness | 2 | 1986 | Self Published | Call of Cthulhu (Classic) |
| Desperate Depths | | | Self Published | Call of Cthulhu (WWII) |
| The Devil's Advocate | v2n1 | | Self Published | Call of Cthulhu (Classic) |
| Die Rubezahl | 1 | 1986 | Self Published | Call of Cthulhu (Classic) |
| Die Rubezahl | 3 | 1986 | Self Published | Call of Cthulhu (Classic) |
| The Dig | SM01 | 2007 | Self Published | Call of Cthulhu (Rising) |
| The Dinner Guests | | 2015 | Self Published | Trail of Cthulhu |
| Dinner With Susan | | 2010 | Self Published | Call of Cthulhu (Now) |
| Disaster at Monongah Mining Company | | 2015 | Self Published | Trail of Cthulhu |
| The Dispossessed | | 2001 | Self Published | Call of Cthulhu (Classic) |
| Divine | | 2013 | Self Published | Call of Cthulhu (Delta Green) |
| Doomed Dwarves' Journal | | 1985 | Self Published | Call of Cthulhu (Classic) |
| The Door To Saturn | | 2012 | Self Published | Arkham Horror |
| Down To New England Town | | 1997 | Self Published | Call of Cthulhu (Now) |
| Dragonmeet 2014 Official Programme * | | 2014 | Self Published | Call of Cthulhu (Laundry), Achtung! Cthulhu |
| Dragons and Six-shooters | | 2019 | Self Published | Yes Sir |
| Dream Phone of Cthulhu * | | 2020 | Self Published | Dream Phone of Cthulhu |
| Dream Quest | | 2020 | Self Published | Dream Quest |
| Dreamlands Adventures | | 2012 | Self Published | Dreamlands Adventures |
| Dreams in the Deep | | 2015 | Self Published | Trail of Cthulhu |
| Dreams of Orange | | 2017 | Self Published | Call of Cthulhu (Delta Green) |
| drelb.free.fr | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| The Drooler in the Dark | | 1998 | Self Published | Call of Cthulhu (Classic) |
| Dungeons and Dagon Player's Pamphlet | | 2014 | Self Published | Dungeons and Dagon |
| Eldritch Express | | 2016 | Self Published | Eldritch Express |
| Eldritch Feelings | | 2019 | Self Published | Eldritch Feelings |
| An Eldritch Thing Happened on the Way to the Forum | | 2008 | Self Published | Call of Cthulhu (Now) |
| EldritchWorld | | 2014 | Self Published | EldritchWall |
| Elizabethulhu | | 2001 | Self Published | d20 |
| Emergency Familiarisation Pack | | 2015 | Self Published | Yellow Dawn |
| Ends of the Earth | | | Self Published | Mythos |
| Epic * | | 2002 | Self Published | Call of Cthulhu (Now) |
| Eric Johnson Mythos Collection | | | Self Published | Mythos |
| Exemplary Settings | | 2005 | Self Published | Epitome |
| The Exhibit | | 1999 | Self Published | Call of Cthulhu (Now) |
| Eyes Over Ft. Gatz | | 2011 | Self Published | Call of Cthulhu (Classic) |
| Faint Hymns to the Cold Fruitless Moon | | 2013 | Self Published | Call of Cthulhu (Classic) |
| The Fairfield Project | | | Self Published | Call of Cthulhu (Delta Green) |
| Fairyland | | 2012 | Self Published | Cthulhu Dark |
| The Fall of Guthlac Abbey | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| The Familiar | 4 | Jun 1995 | Self Published | Call of Cthulhu (Classic) |
| The Familiar | 5 | Aug 1995 | Self Published | Call of Cthulhu (Gaslight) |
| FAQ: Mythos | | | Self Published | Mythos |
| Father Dagon Mystery Deck | | 2022 | Self Published | The Heart of Cthulhu |
| A Father's Pride * | | 2003 | Self Published | Call of Cthulhu (Now) |
| Fear of the Dark | | 2021 | Self Published | Fear of the Dark |
| The Fearsome Deities | | 2023 | Self Published | The Fearsome Deities |
| The Feast of Black Annis | | 2005 | Self Published | Buffy the Vampire Slayer, Angel Role-playing Game |
| Feast of Odoacer | | Aug 2019 | Self Published | GURPS (Horror), Call of Cthulhu (Invictus) |
| The Festering Locusts of Fenmore | | Jun 2021 | Self Published | Call of Cthulhu (Darker Trails), GURPS (Horror) |
| Fictional Reality | 12 | Jun 2003 | Self Published | Call of Cthulhu (Classic) |
| Fictional Reality | 18 | Dec 2004 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Dark Ages) |
| Fictional Reality | 8 | Jun 2002 | Self Published | Call of Cthulhu (Classic) |
| Fictional Reality | 9 | Sep 2002 | Self Published | Call of Cthulhu (Classic) |
| The Fiery Cross | 3 | 1985 | Self Published | Call of Cthulhu (Classic) |
| The Fifth Engel | | 2011 | Self Published | CthulhuTech |
| The Final Voyage of Draengr Thar | | Jun 2022 | Self Published | Call of Cthulhu (Strange Aeons) [Viking], GURPS, Dungeons and Dragons |
| Finger Biter | | 1998 | Self Published | Call of Cthulhu (Classic) |
| First Contact | | 2002 | Self Published | Call of Cthulhu (End Time) |
| The First Session | | 2011 | Self Published | CthulhuTech |
| First Strike | 4 | 1987 | Self Published | Call of Cthulhu (Classic) |
| A Flaw in the Lens | | Aug 2022 | Self Published | Call of Cthulhu (Strange Aeons) [1970s], GURPS (Horror) |
| Fools for Love | | 2005 | Self Published | Call of Cthulhu (Dark Ages) |
| A Fossil | | Jan 2020 | Self Published | Call of Cthulhu (Classic) |
| Four Letters At Random | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Fragmented Sanity | FS01 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Free Your Mind | | 2008 | Self Published | Call of Cthulhu (Strange Aeons) [1960s] |
| A Front | | 2011 | Self Published | CthulhuTech |
| Frozen Assets | | 2004 | Self Published | Call of Cthulhu (Rising) |
| Fungus | | 1997 | Self Published | Call of Cthulhu (Now) |
| Gamesman | 6 | 1991 | Self Published | Call of Cthulhu (Strange Aeons) [Future] |
| Gaming Outpost | | | Self Published | Call of Cthulhu (Classic) |
| The Ganymede Job | JN02 | 2009 | Self Published | Call of Cthulhu (Rising) |
| The Gatherer of Nightmares | | 2015 | Self Published | Trail of Cthulhu |
| The Gazebo | 3 | Nov 2012 | Self Published | Call of Cthulhu (Classic) |
| George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) |
| Ghost Ship | | 2016 | Self Published | Lovecraftesque |
| A Gift Not Meant for Them | | 2020 | Self Published | Chthonian Highways |
| Gilman House | | 2003 | Self Published | Call of Cthulhu (Now) |
| GM Guide to NPC Revenge | | 2009 | Self Published | Yellow Dawn |
| Goddess | | 1992 | Self Published | Call of Cthulhu (Now) |
| Golden Tango | | Sep 2023 | Self Published | Achtung! Cthulhu |
| Gotham City '39: The Mirror Eternal | | Feb 2025 | Self Published | Call of Cthulhu (Classic) |
| Gotham Legion | | 2010 | Self Published | Call of Cthulhu (Gaslight) |
| Grand Providence Hotel | | 2012 | Self Published | Monsters and Other Childish Things |
| The Great Dreamer | | 2022 | Self Published | Keep the Heroes Out! |
| The Great Game | | 2004 | Self Published | Call of Cthulhu (Strange Aeons) [Mid 19th Century] |
| The Great Weird War | | 2015 | Self Published | Call of Cthulhu (WWI) |
| A Green, Unplesant Land | | 2016 | Self Published | Call of Cthulhu (Classic) |
| Greenbox | 0 | Dec 2017 | Self Published | Delta Green |
| Ground Zero | EX02 | 2008 | Self Published | Call of Cthulhu (Rising) |
| gwthomas.org | | | Self Published | Call of Cthulhu (Classic) |
| The Hanging Gardens of Babylon | | 2025 | Self Published | Cthulhu Dark |
| Harvest Time | 2 | | Self Published | Call of Cthulhu (Classic) |
| Hastur Hobbies | | | Self Published | Mythos |
| The Haunted | | 2010 | Self Published | Call of Cthulhu (Classic) |
| The Haunted House Conversion Notes | | 2008 | Self Published | Trail of Cthulhu |
| Haunted Places in the USA | | 2004 | Self Published | None |
| The Healer | | 2011 | Self Published | CthulhuTech |
| The Heart Line | | 2016 | Self Published | Lovecraftesque |
| The Heart of Cthulhu | | 2021 | Self Published | The Heart of Cthulhu |
| Heavy Metal | | Oct 1979 | Self Published | None |
| Hellraiser * | | 2002 | Self Published | Call of Cthulhu (Now) |
| Here Be Dragons | | 2003 | Self Published | Call of Cthulhu (Dark Ages) |
| The Home of Jonas Steverud | | | Self Published | Call of Cthulhu (Classic) |
| The Horror in the Void | | 2019 | Self Published | None |
| The Horror of Halloran House | | 2009 | Self Published | Call of Cthulhu (Classic) |
| The Horror of the Glen Conversion Notes | | 2008 | Self Published | Trail of Cthulhu |
| The Horror on Haldon Hill | | 1998 | Self Published | Call of Cthulhu (Classic) |
| The Horror on Two Forks Trail | | 2005 | Self Published | Call of Cthulhu (Darker Trails) |
| Hotel Lovecraft | | 2020 | Self Published | Hotel Lovecraft |
| House of Tindalos | | | Self Published | Mythos |
| House on an Island | | 1996 | Self Published | Call of Cthulhu (Classic) |
| The House on Sentinel Hill * | | 2022 | Self Published | The House on Sentinel Hill |
| House Rules and Case Studies | | 2009 | Self Published | Yellow Dawn |
| The Hum | | 1998 | Self Published | Call of Cthulhu (Now) |
| The Hungry Maggot | 2 | Mar 1995 | Self Published | Call of Cthulhu (Classic) |
| The Huston Veil | | 2016 | Self Published | Lovecraftesque |
| The Hutchinson Cypher | | | Self Published | Mythos |
| hyperwerx.net | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| I Am Providence | | 2014 | Self Published | I Am Providence |
| I Want You to Kill the Ice Cream Man | | 2000 | Self Published | Call of Cthulhu (Now) |
| An Ideal Society | | 2006 | Self Published | Call of Cthulhu (Now) |
| Imazine | 16 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Immortal Minority | 2 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Impaler | | 1984 | Self Published | Call of Cthulhu (Classic) |
| The Incriminating Letter | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Inheritance | FS03 | 2007 | Self Published | Call of Cthulhu (Rising) |
| The Innsmouth Curse | | 2024 | Self Published | The Innsmouth Curse |
| The Innsmouth Lighthouse | | 2009 | Self Published | Risus |
| Innsmouth Mystery | | 2023 | Self Published | Innsmouth Mystery |
| The Innsmouth Papers | | 2020 | Self Published | The Innsmouth Papers |
| Intellect Devourer | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| Intellect Devourer | 7 | Jun 1988 | Self Published | Call of Cthulhu (Now) |
| The Intermountain Matrix Newsletter | 5 | Mar 1991 | Self Published | Call of Cthulhu (Classic) |
| Interregnum | 30 | May 1999 | Self Published | Call of Cthulhu (Classic) |
| The Interstellar Colonial Marine Corps | | 2008 | Self Published | Call of Cthulhu (Rising) |
| Irrational Express * | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Is There a Doctor in the House? | | 2014 | Self Published | Call of Cthulhu (Strange Aeons) [Whoniverse] |
| It Came from the Wild Blue Yonder | | 2010 | Self Published | It Came from the Wild Blue Yonder |
| James Shelton Mine | | 2016 | Self Published | Lovecraftesque |
| The Journal of the Britannic Technology Society | | | Self Published | Call of Cthulhu (Classic) |
| The Journey | | 2002 | Self Published | Call of Cthulhu (Classic) |
| The Joy of Faith | | 2020 | Self Published | Lovecraftesque |
| Keeper of the Woods | | 2007 | Self Published | Call of Cthulhu (Now) |
| The Keepers of the Woods | | 2015 | Self Published | Trail of Cthulhu |
| The Keepers of the Woods * | | 2016 | Self Published | Trail of Cthulhu |
| Kick the Can Resource Pack | | 2020 | Self Published | APOCTHULHU |
| Killin' Kthuloo * | | 2008 | Self Published | Killin' Kthuloo |
| The King in Yellow | | 2017 | Self Published | Arkham Noir |
| The Knife | | 1998 | Self Published | Call of Cthulhu (Now) |
| Lambs of a Nameless God | | 2009 | Self Published | CthulhuTech |
| Land of the Rising Dead | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Lands of the Dark Wicche | | Feb 2021 | Self Published | Call of Cthulhu (Dark Ages), GURPS, Dungeons and Dragons |
| Last Bus Leaving Arkham | | 2025 | Self Published | Cthulhu Awakens |
| The Last Equation * | | 2011 | Self Published | Call of Cthulhu (Delta Green) |
| The Last Hours of the International Space Station | | 2016 | Self Published | Lovecraftesque |
| Last Things Last | | 2015 | Self Published | Delta Green |
| Law of Effect | | 2000 | Self Published | Delta Green |
| The Lion Sleeps Tonight | | 2000 | Self Published | Call of Cthulhu (WWII) |
| A Little Thing | | 2005 | Self Published | Call of Cthulhu (Classic) |
| Live Evil | | 2004 | Self Published | Call of Cthulhu (Now) |
| The Locksmith | | 2015 | Self Published | Trail of Cthulhu |
| The Log of the Narwhal | | 2007 | Self Published | Call of Cthulhu (Classic) |
| London on the Shores of Lake Hali | | 2015 | Self Published | Trail of Cthulhu |
| Lord Karma Has Gone Insane | | 2005 | Self Published | Call of Cthulhu (Dreamlands) |
| The Lords of Dagontown | | 2022 | Self Published | Monster of the Week |
| The Lost Cell | | 2013 | Self Published | Call of Cthulhu (Delta Green) |
| The Lost Jewels of Eire | | Mar 2020 | Self Published | GURPS, D6 Adventures, Broken Compass, Call of Cthulhu (Classic) |
| Lovecraft CYOA | | 2015 | Self Published | JumpChain! |
| Lovecraft Rules * | | 2013 | Self Published | Lovecraft Rules |
| Lovecraftian Shorts | | 2012 | Self Published | Lovecraftian Shorts |
| Lozdra | | 1998 | Self Published | Call of Cthulhu (Classic) |
| The Lunatics Have Taken Over the Asylum | | 2007 | Self Published | Call of Cthulhu (Gaslight) |
| The Lurking Horror | | | Self Published | Mythos |
| Madness and Desire | | 2017 | Self Published | Madness and Desire |
| Madness: The Solo Version | | 2011 | Self Published | Madness: The Solo Version |
| The Major | | 2011 | Self Published | CthulhuTech |
| Making Movies | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Mana Bros | | | Self Published | Call of Cthulhu (Classic) |
| Manic Depressive | 1 | 1985 | Self Published | Call of Cthulhu (Classic) |
| Masks of Nyarlathotep Conversion Notes | | 2008 | Self Published | Trail of Cthulhu |
| The Maze of Madness | | 2004 | Self Published | Call of Cthulhu (Classic) |
| Mean 13 | | 2021 | Self Published | Chthonian Highways |
| Mi-Go | | 2018 | Self Published | Sundered Epoch: Generations |
| The Mi-Go Outpost Inside of the Red Mesa | | 2017 | Self Published | None |
| A Midsummer Night's Haunting | | 2013 | Self Published | Cthulhu Dark |
| Mind Over Matter | | 2016 | Self Published | Call of Cthulhu (Classic) |
| Minions of Cthulhu | | 2011 | Self Published | Minions of Cthulhu |
| The Miskatonic | | 2018 | Self Published | JumpChain! |
| Miskatonic Madness | | 2005 | Self Published | Miskatonic Madness |
| Miskatonic Tales | | 2022 | Self Published | Miskatonic Tales |
| Mists of the Aeons | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Delta Green) |
| A Moment of Your Time | | 2016 | Self Published | Lovecraftesque |
| Monsters of the Mythos | | 2012 | Self Published | Yellow Dawn |
| Monstrous Perversions | 1 | 1985 | Self Published | Call of Cthulhu (Classic) |
| Monstrous Perversions | 2 | | Self Published | Call of Cthulhu (Classic) |
| A Most Awful Plant | | 1999 | Self Published | Call of Cthulhu (Now) |
| The Mound in the Yard | | Oct 2020 | Self Published | Call of Cthulhu (Now), GURPS (Horror) |
| Murder Incorporated * | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Music From a Darkened Room | | 2005 | Self Published | Call of Cthulhu (Delta Green) |
| My Aunt's House | | 1996 | Self Published | Call of Cthulhu (Classic) |
| My Overcrowded Pineal Gland | | 2000 | Self Published | Call of Cthulhu (Classic) |
| Mystery on Mona | | 2008 | Self Published | Call of Cthulhu (Invictus) |
| Mythos Monsters | | 2018 | Self Published | None |
| Mythos Monsters 2 | | 2021 | Self Published | None |
| Nanomach and Synthology | | 2012 | Self Published | Yellow Dawn |
| NecronomiCards | | 2016 | Self Published | NecronomiCards |
| NecronomiCards: Volume 2 | | 2018 | Self Published | NecronomiCards |
| Necronomicon: The Card Game | | 2008 | Self Published | Necronomicon: The Card Game |
| Necronomizine | | 2020 | Self Published | Fate of Cthulhu |
| NecroSticknomicon | | 2006 | Self Published | StickGuy |
| Neighborhood | | | Self Published | Call of Cthulhu (Now) |
| Never Say Never | | 2010 | Self Published | Call of Cthulhu (Classic) |
| A New Jerusalem | | 2011 | Self Published | Call of Cthulhu (Dark Ages) |
| Night Floors | | 2008 | Self Published | Call of Cthulhu (Delta Green) |
| Nightgaunt | | 2018 | Self Published | Dungeons and Dragons |
| Nightscapes | 12 | Dec 1999 | Self Published | Call of Cthulhu (Classic) |
| Nightscapes | 13 | May 2000 | Self Published | Call of Cthulhu (Classic) |
| Nightscapes | 14 | Aug 2001 | Self Published | Call of Cthulhu (Classic) |
| Nightscapes | 7 | Apr 1998 | Self Published | Call of Cthulhu (Now) |
| Nightscapes | 8 | Jul 1998 | Self Published | Call of Cthulhu (Classic) |
| Nightwatch | 1 | Nov 1992 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Niteside Dreams | | 2002 | Self Published | Call of Cthulhu (Classic) |
| No Safety From the Sand | | 2016 | Self Published | Lovecraftesque |
| Nuprin Ftaghn | | 2005 | Self Published | Angel Role-playing Game, Buffy the Vampire Slayer |
| Nyarlathotep Web Designs | | | Self Published | Call of Cthulhu (Classic) |
| O Brave New World | | 2014 | Self Published | Lamentations of the Flame Princess |
| Obelisk: The Howling | | 2011 | Self Published | Risus |
| Of Sound Mind and Body | | 2001 | Self Published | Call of Cthulhu (Gaslight) |
| Old Blood | | 1996 | Self Published | Call of Cthulhu (Now) |
| The Once and Future King | | 1999 | Self Published | Call of Cthulhu (Classic) |
| Once in a Lifetime | 1 | 1986 | Self Published | Call of Cthulhu (Classic) |
| One of Us | | 2008 | Self Published | Call of Cthulhu (Classic) |
| One Page Dungeon Compendium 2009 | | 2009 | Self Published | None |
| One Thousand and One Nights and One Night | 26 | Mar 2008 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (WWI) |
| One Thousand and One Nights and One Night | 32 | Jun 2008 | Self Published | Call of Cthulhu (WWI) |
| Operation DUSTBOWL | | 2017 | Self Published | Delta Green |
| Opifex Bimonthly | 1 | 1996 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Opifex Bimonthly | 2 | 1996 | Self Published | Call of Cthulhu (Classic) |
| Opifex Bimonthly | 11 | Jan 1998 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Opifex Bimonthly | 12 | Mar 1998 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Opifex Bimonthly | 13 | May 1998 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 14 | Jul 1998 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 15 | Sep 1998 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 16 | Nov 1998 | Self Published | Call of Cthulhu (Delta Green), Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Opifex Bimonthly | 17 | Jan 1999 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 18 | Mar 1999 | Self Published | Call of Cthulhu (Classic) |
| Opifex Bimonthly | 19 | May 1999 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Opifex Bimonthly | 20 | Jul 1999 | Self Published | Call of Cthulhu (Classic) |
| Opifex Bimonthly | 21 | Sep 1999 | Self Published | Call of Cthulhu (Classic) |
| Opifex Bimonthly | 22 | Nov 1999 | Self Published | Call of Cthulhu (Gaslight), Call of Cthulhu (Now) |
| Opifex Bimonthly | 23 | Jan 2000 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 24 | Mar 2000 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 3 | 1996 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 4 | 1996 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 5 | 1996 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 6 | Mar 1997 | Self Published | Call of Cthulhu (Now) |
| Opifex Bimonthly | 7 | May 1997 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Opifex Bimonthly | 8 | Jul 1997 | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Classic) |
| Opifex Bimonthly | 9 | Sep 1997 | Self Published | Call of Cthulhu (Classic) |
| Otherworldly Patron: The Great Cthulhu | | 2020 | Self Published | Advanced Dungeons and Dragons (Ravenloft) |
| Out of the Depths | | 1992 | Self Published | Call of Cthulhu (Now) |
| The Outpost of the Outer Ones | YS1 | 2015 | Self Published | Advanced Dungeons and Dragons |
| Pagan Call | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Papyrus | 14 | Apr 1994 | Self Published | Call of Cthulhu (Classic), GURPS |
| Peak Intensity | | Jun 2023 | Self Published | Achtung! Cthulhu |
| Pegasus | | | Self Published | Call of Cthulhu (Classic) |
| The Pennywell Hangmen | | 2008 | Self Published | Call of Cthulhu (Classic) |
| People of Innsmouth | 13 | | Self Published | Call of Cthulhu (Classic) |
| People of Innsmouth | 15 | | Self Published | Call of Cthulhu (Classic) |
| The People of Innsmouth | 21 | | Self Published | Call of Cthulhu (Classic) |
| PerChance | 3 | | Self Published | Call of Cthulhu (Cyberpunk) |
| PerChance | 6 | Sep 1991 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) |
| PerChance | 7 | Dec 1991 | Self Published | Call of Cthulhu (Gaslight), Call of Cthulhu (Classic) |
| PerChance | 5 | May 1991 | Self Published | Call of Cthulhu (Gaslight) |
| The Phantom Jungle | | Feb 2022 | Self Published | Call of Cthulhu (Classic), GURPS |
| The Phoenix Command Conspiracy | | | Self Published | Call of Cthulhu (Delta Green), Phoenix Command |
| Pines and Sunshine | | 1999 | Self Published | Call of Cthulhu (Now) |
| Pink Elephant | 1 | 1987 | Self Published | Call of Cthulhu (Now) |
| The Pirates of Leng | | | Self Published | The Pirates of Leng |
| plateau-of-leng.demon.co.uk | | | Self Published | Call of Cthulhu (Delta Green), Call of Cthulhu (Classic) |
| Player of Hell | | 2001 | Self Published | Call of Cthulhu (Now) |
| Polaris | 1 | Sum 1987 | Self Published | Call of Cthulhu (Classic) |
| Porridge | | 2016 | Self Published | Lovecraftesque |
| Portals | 1 | 1993 | Self Published | Call of Cthulhu (Classic) |
| The Possession | | 2013 | Self Published | Call of Cthulhu (Classic) |
| The Post Modernists | | 2008 | Self Published | Call of Cthulhu (Rising) |
| Protoplasm | 3 | | Self Published | Call of Cthulhu (Classic) |
| PULP Fiction | | | Self Published | Call of Cthulhu (Now) |
| Raid on Alpha Base | | Jun 2023 | Self Published | Achtung! Cthulhu |
| Raid on Black Goat Wood * | | 2010 | Self Published | None |
| Rare Antiquities | | 2016 | Self Published | Lovecraftesque |
| The Real Leeds | | 2017 | Self Published | Arkham Noir |
| Realm of Cthulhu | | | Self Published | Talisman |
| Reckoning of the Dead | | | Self Published | Call of Cthulhu (Atomic), Call of Cthulhu (Gaslight), Call of Cthulhu (Classic), Call of Cthulhu (WWII), Call of Cthulhu (Now) |
| Recovered Relics | | 2009 | Self Published | Yellow Dawn |
| Red Desire | Cold Murder | | 2008 | Self Published | Yellow Dawn |
| Redacted Rituals | | 2018 | Self Published | Delta Green |
| Resident Evil * | | 2002 | Self Published | Call of Cthulhu (Now) |
| Rest Stops | | 1996 | Self Published | Call of Cthulhu (Now) |
| The Return of Doctor Moreau | | 2006 | Self Published | Call of Cthulhu (Classic) |
| Return to the Monolith | | 1998 | Self Published | Call of Cthulhu (Now) |
| Rhyme With Dark Reason | | 2004 | Self Published | Call of Cthulhu (Classic) |
| Ride a White Horse | | 2016 | Self Published | Lovecraftesque |
| Ripper Fhtagn | | 2020 | Self Published | The Jack Hack |
| Rise of Cthulhu | | 2015 | Self Published | Rise of Cthulhu |
| Rise of the Elders | | 2017 | Self Published | Rise of the Elders |
| Robo's Mythos CCG Web Page | | | Self Published | Mythos |
| The Rocky Vale Horror | | 2003 | Self Published | Call of Cthulhu (Now) |
| Rogues Gallery | | 2009 | Self Published | Yellow Dawn |
| Roleplay, What, Who, Why and Where? | | | Self Published | Call of Cthulhu (Classic), GURPS (Horror) |
| The Ronin | | 2011 | Self Published | CthulhuTech |
| Rosemary's Baby | | | Self Published | Mythos |
| RPG Archive | | | Self Published | Call of Cthulhu (Now), Call of Cthulhu (Dreamlands), Call of Cthulhu (Darker Trails), Call of Cthulhu (Classic), Call of Cthulhu (Strange Aeons) [1978] |
| RPG Review | 1 | Sep 2008 | Self Published | Call of Cthulhu (Delta Green) |
| RPG Review | 13,14 | Dec 2011 | Self Published | Call of Cthulhu (Classic) |
| RPG Review | 17 | Sep 2012 | Self Published | Call of Cthulhu (Classic) |
| RPG Review | 18 | Dec 2012 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| RPG Review | 28.29 | Sep 2015 | Self Published | None |
| RPG Review | 43 | Jun 2019 | Self Published | Call of Cthulhu (Classic), Nephilim |
| RPG Review | 7 | Mar 2009 | Self Published | Vampyre the Masquerade, Call of Cthulhu (Delta Green), Chill, Call of Cthulhu (Classic), Advanced Dungeons and Dragons (Ravenloft), Trail of Cthulhu, Kult, GURPS, Little Fears |
| rpg.net | | | Self Published | Call of Cthulhu (Cyberpunk) |
| Runestone * | 5 | 1985 | Self Published | Call of Cthulhu (Classic) |
| Runestone * | 6 | 1985 | Self Published | Call of Cthulhu (Classic) |
| S-P-O-N-G-E: Fight the Evil | | 2001 | Self Published | S-P-O-N-G-E: Fight the Evil |
| Samhain | 2 | Spr 1987 | Self Published | None |
| Sanity and Sorcery | | 2018 | Self Published | Lasers and Feelings (Sanity and Sorcery) |
| Sauron Strikes Back | 1 | 1987 | Self Published | Call of Cthulhu (Classic) |
| Save Our Souls | | 1989 | Self Published | Call of Cthulhu (Now) |
| The Scarecrow | | 1991 | Self Published | Call of Cthulhu (Now) |
| Scooby Doo Adventures | | | Self Published | Mythos |
| Scooby Doo Bonus Cards | | | Self Published | Mythos |
| Scooby Doo Set 1 | | | Self Published | Mythos |
| Scooby Doo Set 2 | | Mar 1999 | Self Published | Mythos |
| Scooby Doo Set 3 | | | Self Published | Mythos |
| The Screaming Horror of Creech Hill | | 2006 | Self Published | Call of Cthulhu (Classic) |
| Sea Food | | 1996 | Self Published | Call of Cthulhu (Now) |
| Seattle | | | Self Published | Mythos |
| Secret Cthulhu | | 2019 | Self Published | Secret Cthulhu |
| The Secret Glory | | 2021 | Self Published | Call of Cthulhu (Classic) |
| The Secret of Cykranosh | | 2016 | Self Published | Dungeons and Dragons |
| Seizure | | 2005 | Self Published | Call of Cthulhu (Strange Aeons) [1962] |
| The Sense of the Sleight of Hand Man * | | 2010 | Self Published | Call of Cthulhu (Dreamlands) |
| Serena's Dojo | | 1999 | Self Published | Mythos |
| Serendipity's Circle | 1 | Jan 1995 | Self Published | Call of Cthulhu (Classic), None, Dark Conspiracy, Call of Cthulhu (Now) |
| Serendipity's Circle | 2 | Mar 1995 | Self Published | Call of Cthulhu (Classic), Bloodshadows, Dark Conspiracy, The Whispering Vault |
| Serendipity's Circle | 3 | May 1995 | Self Published | Call of Cthulhu (Classic), Chill, Bloodshadows, None |
| Serendipity's Circle | 4 | Jul 1995 | Self Published | Call of Cthulhu (Classic), Pandemonium, Chill, Shattered Dreams, Bloodshadows, The Whispering Vault, Mage: The Ascension |
| Serendipity's Circle | 5 | Sep 1995 | Self Published | Chill, The Whispering Vault, Dark Conspiracy, None, Don't Look Back, Call of Cthulhu (Now), Over the Edge |
| Serendipity's Circle | 6 | Win 1995 | Self Published | Nephilim, The Whispering Vault, Call of Cthulhu (Now), Bureau 13, Immortal: The Invisible War, Call of Cthulhu (Classic) |
| Serendipity's Circle | 7 | Mar 1996 | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 8 | Sum 1996 | Self Published | Lost Souls, Shattered Dreams, None, Nephilim, The Whispering Vault, Call of Cthulhu (Now), Bloodshadows, Call of Cthulhu (Classic), Chill, Don't Look Back |
| Serendipity's Circle | S1 | 1995 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now), Dark Conspiracy, None |
| Serendipity's Circle | S2 | 1996 | Self Published | None, Shattered Dreams, Call of Cthulhu (Now), The Whispering Vault, Bloodshadows, Call of Cthulhu (Classic), Don't Look Back |
| Serendipity's Circle | 13 | Win 1997 | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 14 | Spr 1998 | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 9 | | Self Published | [None Listed] |
| Serendipity's Circle | 10 | | Self Published | [None Listed] |
| Serendipity's Circle | 11 | | Self Published | Call of Cthulhu (Now) |
| Serendipity's Circle | 12 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 15 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 16 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 17 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 18 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 19 | | Self Published | Call of Cthulhu (Classic) |
| Serendipity's Circle | 20 | | Self Published | Call of Cthulhu (Classic) |
| Sesqua Valley | | | Self Published | Mythos |
| The Shadow in the Tree * | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Shadow Kingdoms | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Shadow of Miskatonic | | 2020 | Self Published | Shadow of Miskatonic |
| The Shadow Over Dunsmore Point | | 2019 | Self Published | Dungeons and Dragons |
| Shadows of the Old Subway | | Dec 2023 | Self Published | GURPS (Horror), Call of Cthulhu (Classic) |
| Shadows of the Quartinex | | 2009 | Self Published | Yellow Dawn |
| Shadows of the Quartinex * | | 2013 | Self Published | Yellow Dawn |
| Shadyvill | | 2006 | Self Published | Call of Cthulhu (Now) |
| The Shaft | | 2007 | Self Published | The World of Darkness |
| shoggoth.net | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Strange Aeons) [Future], Star Wars, Call of Cthulhu (Gaslight), GURPS, Call of Cthulhu (Now), Advanced Dungeons and Dragons (Ravenloft), Call of Cthulhu (Invictus), Paranoia |
| The Silence of Eastpoint | | 2020 | Self Published | Dungeons and Dragons |
| Sinful Season | | 2014 | Self Published | Call of Cthulhu (Delta Green) |
| Sing Sing | | 2006 | Self Published | Call of Cthulhu (Classic) |
| Sink Hole | | 1999 | Self Published | Call of Cthulhu (Now) |
| Sins of the Flesh | FS04 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Sogailraugh | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| Song of the Star Walkers | | 2012 | Self Published | Call of Cthulhu (Delta Green) |
| The Sorcerer's Scroll | 25 | 1987 | Self Published | Call of Cthulhu (Classic) |
| Soth | | 2015 | Self Published | Soth |
| Sound and Fury | 4 | | Self Published | Call of Cthulhu (Classic) |
| South East London Wargames Group | | | Self Published | Mythos |
| The Spear of Y'Golonac | | 2009 | Self Published | Call of Cthulhu (Now) |
| Spectral Tides | | Nov 2023 | Self Published | Call of Cthulhu (Now), GURPS (Horror), Dark Places and Demogorgons |
| Spiralis | | 2018 | Self Published | Spiralis |
| Spirit of a Thief | | 1996 | Self Published | Call of Cthulhu (Now) |
| Spirits Over Arkham | | 1987 | Self Published | Call of Cthulhu (Classic) |
| The Squad Leader | | 2011 | Self Published | CthulhuTech |
| Squamous | | 2017 | Self Published | Squamous |
| St Cecilia's Blasphemous Bordello | | Dec 2021 | Self Published | Call of Cthulhu (Darker Trails), GURPS |
| St Raphael's | | 2002 | Self Published | Call of Cthulhu (Classic) |
| Starquestor | 1 | | Self Published | Call of Cthulhu (Classic) |
| The Stars Are Also Fire | SM03 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Stealing Cthulhu | | 2011 | Self Published | Cthulhu Dark |
| Sticks and Twigs Like Men | | 2005 | Self Published | Call of Cthulhu (Classic) |
| A Sticky Situation | | 2019 | Self Published | Call of Cthulhu (Classic) |
| Stielkrieg | | | Self Published | Call of Cthulhu (Classic) |
| Strain and the Fraying Mind | | 2019 | Self Published | Chthonian Highways |
| The Strange and Sunken Fate of Karl Heinrich | | Jul 2019 | Self Published | Call of Cthulhu (Classic), GURPS (Horror) |
| Street Chases and Mobs | | 2012 | Self Published | Yellow Dawn |
| Strike! Lovecraftian Adventure | | 2015 | Self Published | Strike! |
| Sukakpak | | 2011 | Self Published | Cthulhu Dark |
| Surface Tension | SM02 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Swamp Bones | | 1996 | Self Published | Call of Cthulhu (Now) |
| The Swedish Connection | | 2024 | Self Published | Delta Green |
| The Tager | | 2011 | Self Published | CthulhuTech |
| Take the Force of the Blow | | 1999 | Self Published | Call of Cthulhu (Classic) |
| Tales of Terror (III) | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| talesofterror.net | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Talien's Tower | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| Tatterdemallion | | 1988 | Self Published | Call of Cthulhu (Classic) |
| Teen Detective | | Nov 2017 | Self Published | Teen Detective |
| Tempestuous Orifice | 3 | | Self Published | Call of Cthulhu (Classic) |
| Tempestuous Orifice * | 4 | 1984 | Self Published | Call of Cthulhu (Classic) |
| Temple in the Ice | | 2000 | Self Published | Call of Cthulhu (Now) |
| Temporary Insanity | | 2004 | Self Published | Call of Cthulhu (Now) |
| Tenants of Hell | SM05 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Territory Blues | | | Self Published | Lovecraftesque |
| Terror Australis | | | Self Published | Call of Cthulhu (Classic) |
| Terror on the Arkham Express * | | 2020 | Self Published | None |
| Test Facility 3188 | EX01 | 2007 | Self Published | Call of Cthulhu (Rising) |
| Thastygliax's Vault | | | Self Published | Mythos |
| Thin Jack | | 1992 | Self Published | Call of Cthulhu (Now) |
| The Thing from Jakarta | | 2002 | Self Published | Call of Cthulhu (Now) |
| The Thing in the Park | | 1996 | Self Published | Call of Cthulhu (Now) |
| The Thing They Brought Back | | 2012 | Self Published | Call of Cthulhu (Classic) |
| Those the Comet Brings | | Aug 2021 | Self Published | Call of Cthulhu (Atomic), GURPS (Horror) |
| Thrusher Manor | | Dec 2019 | Self Published | Call of Cthulhu (Classic), GURPS (Horror) |
| Timeout | 15 | | Self Published | None |
| Timeout | 16 | | Self Published | Call of Cthulhu (Classic) |
| Timeout | 17 | | Self Published | Call of Cthulhu (Classic) |
| Timeout | 20 | | Self Published | Call of Cthulhu (Classic) |
| Timeout | 21 | | Self Published | Call of Cthulhu (Classic) |
| Timeout | 5 | | Self Published | None |
| Tindalos RPG | | 2008 | Self Published | Tindalos |
| Titas of Arkham | | 2019 | Self Published | Titas of Arkham |
| To Kill a Lie: 2nd Gig | | 2009 | Self Published | CthulhuTech |
| Tomb of Ash | | 2002 | Self Published | Call of Cthulhu (Now) |
| Tomb of Nyarlathotep | | 2015 | Self Published | Dungeons and Dragons |
| Tomes of Arkham | | 2024 | Self Published | Tomes of Arkham |
| Tough Gains | | 2008 | Self Published | Yellow Dawn |
| The Tower | | 2006 | Self Published | Call of Cthulhu (Dark Ages) |
| The Transactions of the Royal Martian Geographical Society | 1 | 1991 | Self Published | Space 1889, Call of Cthulhu (Gaslight) |
| The Transactions of the Royal Martian Geographical Society | 2 | 1991 | Self Published | Call of Cthulhu (Gaslight), Space 1889 |
| The Transactions of the Royal Martian Geographical Society | 3 | 1992 | Self Published | Call of Cthulhu (Gaslight) |
| The Transactions of the Royal Martian Geographical Society | 4 | 1992 | Self Published | Call of Cthulhu (Gaslight), Space 1889 |
| The Transformation of Henrietta Z. | | 2017 | Self Published | Delta Green |
| The Transition of Ludvig Prinn | | 2015 | Self Published | Trail of Cthulhu |
| Tribal Dance | | | Self Published | Call of Cthulhu (Now) |
| Trizine | 2 | 1986 | Self Published | Call of Cthulhu (Classic) |
| Trizine | 3 | | Self Published | Call of Cthulhu (Classic) |
| Trophies | | 2000 | Self Published | Call of Cthulhu (Classic) |
| Turn to Stone | | 2007 | Self Published | Call of Cthulhu (Classic) |
| Ubar | | | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Gaslight) |
| The Uncanny Curse of Sekhmet | | Jun 2020 | Self Published | GURPS, Risus, Broken Compass, Call of Cthulhu (Classic) |
| Under a Grey Sun | | 2016 | Self Published | Lovecraftesque |
| Under the Deep | | 2013 | Self Published | Call of Cthulhu (Classic) |
| Unknown | | | Self Published | Call of Cthulhu (Classic) |
| The Unmasking | | 2013 | Self Published | Call of Cthulhu (Delta Green) |
| The Unnamed | 3 | | Self Published | Call of Cthulhu (Classic) |
| Unofficial Mythos Adventure Archive | | | Self Published | Mythos |
| Verboten! Operation: FAUST | | 2002 | Self Published | Call of Cthulhu (WWII) |
| Vermont Horror Expansion | | 2011 | Self Published | Arkham Horror |
| A Victim of the Art | | 2008 | Self Published | Call of Cthulhu (Delta Green) |
| Vienna | 7 | Feb 1995 | Self Published | Call of Cthulhu (Classic) |
| Vision | 3 | Oct 1992 | Self Published | Call of Cthulhu (Classic) |
| Vollmond | 2 | 1989 | Self Published | Call of Cthulhu (Classic) |
| Vollmond | 3 | 1990 | Self Published | Call of Cthulhu (Classic) |
| War Buddy | | 1998 | Self Published | Call of Cthulhu (Classic) |
| The Waters Over Heaven * | | 2003 | Self Published | Call of Cthulhu (Classic) |
| Weaponised Relic - Arnimor DUAL final plus | | 2012 | Self Published | CthulhuTech |
| A Web Page from a Friend | | | Self Published | Mythos |
| Weird and Cosmic Horror Ref | | 2021 | Self Published | None |
| A Welcome in the Hills | | 2008 | Self Published | Call of Cthulhu (Now) |
| Welcome to Lovecraft Country | | 2012 | Self Published | Fiasco Classic |
| The Well | | 1999 | Self Published | Call of Cthulhu (Now) |
| What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic), Call of Cthulhu (Now) |
| What Shall I Do to Shun the Snares of Death | | 2011 | Self Published | Call of Cthulhu (Invictus), Call of Cthulhu (Delta Green) |
| Wild Dog Gorge | | 2008 | Self Published | Yellow Dawn |
| The Wilder Parts of the Forest | | 2016 | Self Published | Lovecraftesque |
| Will's Island | | 1998 | Self Published | Call of Cthulhu (Now) |
| Window of the Mind | | 2001 | Self Published | Call of Cthulhu (Now) |
| Witches of N'Kai | | 2009 | Self Published | Witches of N'Kai |
| Woodson Pond | | 1999 | Self Published | Call of Cthulhu (Now) |
| World of Cthulhu | | 2005 | Self Published | The World of Darkness |
| Writers in the Darkness | | 2020 | Self Published | Writers in the Darkness |
| The Wrong | | 1996 | Self Published | Call of Cthulhu (Now) |
| wtimmins.tripod.com | | | Self Published | Big Eyes Small Mouth, Call of Cthulhu (Classic), Unknown Armies, Call of Cthulhu (End Time), Call of Cthulhu (Delta Green) |
| www.eerie.fr/~alquier | | | Self Published | Call of Cthulhu (Classic) |
| www.kisa.ca/vtm | | | Self Published | Vampyre the Masquerade, Call of Cthulhu (Classic) |
| www.onr.com/user/bturner | | | Self Published | Call of Cthulhu (Classic) |
| www.skinner.demon.co.uk/aidan/common/ | | | Self Published | Call of Cthulhu (Classic) |
| Wyrd Sails | | 2022 | Self Published | Everywhen |
| A Yellow and Unpleasant Land Resource Pack | | 2020 | Self Published | APOCTHULHU |
| The Yellow Curtain | | 2023 | Self Published | The Yellow Curtain |
| Yellow Dawn: The Age of Hastur | B00262MLA2 | 2006 | Self Published | Yellow Dawn |
| Yellow Dawn: The Age of Hastur | | 2013 | Self Published | Yellow Dawn |
| Yog-Sothery Trick Taking Game | | 2024 | Self Published | Yog-Sothery |
| Zortiander Inc. Catalogue | | | Self Published | CthulhuTech |
