| Title | Code | Date | Publisher | System (Setting) |
|---|
 Galilee Springs | | Sep 2019 | Chaosium | Call of Cthulhu (Now) |
| The Game is Rigged | | Jul 2024 | Chaosium | Call of Cthulhu (Now) |
 Game News | 7 | Sep 1985 | Associates International | Call of Cthulhu (Classic) |
| Game Night | | Jan 2023 | Chaosium | Call of Cthulhu (Now) |
| Game Trade Magazine | 26 | Apr 2002 | Alliance Game Distributors | Call of Cthulhu (Now) |
| Game Trade Magazine | 53 | Jul 2004 | Alliance Game Distributors | Call of Cthulhu (Classic) |
| Game Trade Magazine | 100 | Jun 2008 | Alliance Game Distributors | Call of Cthulhu (Classic) |
| Game Trade Magazine | 102 | Aug 2008 | Alliance Game Distributors | Call of Cthulhu (Classic) |
| Game Trade Magazine | 135 | May 2011 | Alliance Game Distributors | Call of Cthulhu (Classic) |
 Game's Afoot | 9 | 1992 | Zirlinson Publications | Call of Cthulhu (Classic) |
 Gamemaster's Screen | CB71201 | 2010 | Cubicle 7 | Call of Cthulhu (Laundry) |
| Gamemaster's Screen | JCG026 | 2018 | Just Crunch Games | The Cthulhu Hack |
| Games Master International | 10 | May 1991 | Newsfield | Call of Cthulhu (Classic) |
| Games Master International | 12 | Jul 1991 | Newsfield | Call of Cthulhu (Classic) |
| Games Master International | 13 | Aug 1991 | Newsfield | Shadowrun |
| Games Master International | 14 | Sep 1991 | Newsfield | Call of Cthulhu (Classic), Shadowrun |
| Games Master International | 15 | Oct 1991 | Newsfield | Call of Cthulhu (Classic) |
| Games Review Monthly | 12 | Sep 1989 | 252 e.V. | Space 1889, Call of Cthulhu (Gaslight) |
| Games Review Monthly | 6 | Mar 1989 | Eden Publication | Call of Cthulhu (Classic) |
| Gamesman | 6 | 1991 | Self Published | Call of Cthulhu (Strange Aeons) [Future] |
| Gamesmaster's Guide | MUH051744 | 2021 | Modiphius Entertainment | Achtung! Cthulhu |
| Gamesmaster's Screen and Toolkit | MUH051746 | 2021 | Modiphius Entertainment | Achtung! Cthulhu |
 Gaming Outpost | | | Self Published | Call of Cthulhu (Classic) |
| The Ganymede Job | JN02 | 2009 | Self Published | Call of Cthulhu (Rising) |
| The Gaslight Equipment Catalogue | CHA0319 | 2005 | Chaosium | Call of Cthulhu (Gaslight) |
| Gaslight Gurglings | | Jan 2023 | Chaosium | Call of Cthulhu (Gaslight) |
 The Gate of R'lyeh | R42 | 2018 | DPH Games | The Gate of R'lyeh |
 Gate Pack | | 2013 | Petersen Games | Cthulhu Wars |
| Gates of Arkham | SL16 | 2015 | Fantasy Flight Games | Elder Sign |
| Gates of Delerium | | 2019 | Renegade Game Studios | Gates of Delerium |
| The Gateway Bestiary | | 1980 | Chaosium | Runequest |
| Gateways | v2n6 | Nov 1987 | Gateways Publications | None |
| Gateways | v2n9 | Jun 1988 | Gateways Publications | Call of Cthulhu (Now), Beyond the Supernatural |
| Gateways to Terror | CHA23140 | 2019 | Chaosium | Call of Cthulhu (Classic) |
| The Gatherer of Nightmares | | 2015 | Self Published | Trail of Cthulhu |
| Gatsby and the Great Race | CHA0324 | 2005 | Chaosium | Call of Cthulhu (Classic) |
 The Gazebo | 3 | Nov 2012 | Self Published | Call of Cthulhu (Classic) |
| Gen Con Online 2020 Card * | | 2020 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Gen Con Promo Set | | 2018 | Smirk and Dagger Games | Tower of Madness |
| Gentleman Convicts | cr3005h | 2017 | Cthulhu Reborn | Call of Cthulhu (Convicts) |
| Geometry of the Void | | 2019 | Adreama Games | Machina Arcana |
| George Ruban at geocities | | | Self Published | Call of Cthulhu (Classic) |
| Georgia On My Mind | | Nov 2020 | Chaosium | Call of Cthulhu (Atomic) |
| Get Along, Little Dogies | | Jun 2022 | Chaosium | Call of Cthulhu (Darker Trails) |
| Ghatanothoa: The Forgotten One | | Mar 2024 | Chaosium | Call of Cthulhu (Now) |
| The Ghost of Bonnington Nunnery | | Dec 2022 | Chaosium | Call of Cthulhu (Dark Ages) |
| Ghost Ship | | 2016 | Self Published | Lovecraftesque |
| Ghost Trade | | Sep 2023 | Chaosium | Call of Cthulhu (Classic) |
| The Ghosts in the House | CHA0396 | 2010 | Chaosium | Call of Cthulhu (Now) |
| Ghosts of Opal Ditch | | 2013 | Gremlin Legions | Cthulhu Dark |
| Ghouls of the Miskatonic * | EAH01 | 2015 | Fantasy Flight Games | Arkham Horror |
| Giant Blind Albino Penguins | | 2020 | Petersen Games | Cthulhu Wars |
| A Gift Not Meant for Them | | 2020 | Self Published | Chthonian Highways |
| Gilman House | | 2003 | Self Published | Call of Cthulhu (Now) |
 The Gleaming Spiral | CT44 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG |
| Glow-in-the-Dark Cthulhu | CW-GL01 | 2017 | Petersen Games | Cthulhu Wars |
| Glow-in-the-Dark Great Old Ones | CW-GL02 | 2016 | Petersen Games | Cthulhu Wars |
| Glozel Est Authentique! | T-5 | 1984 | Theatre of the Mind Enterprises | Call of Cthulhu (Classic) |
| GM | 18 | Feb 1990 | Croftward Limited | Call of Cthulhu (Classic) |
| GM Guide to NPC Revenge | | 2009 | Self Published | Yellow Dawn |
| GM Guide to NPC Revenge | | 2012 | Self Published | Yellow Dawn |
| Go Towards the Light | WDF33404 | 2015 | WildFire Games | The Void |
| Goat Mother * | CHA6060 | 2015 | Chaosium | Call of Cthulhu (Classic) |
| Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now) |
| Goblin on Bourbon Street | GGP1503 | 2015 | Golden Goblin Press | Call of Cthulhu (Classic) |
| The God Beneath the Tree | GRR6400 | 2023 | Green Ronin Publishing | Cthulhu Awakens |
| God Game Black | CB71207 | 2013 | Cubicle 7 | Call of Cthulhu (Laundry) |
| God's Breath | APU8170 | 2024 | Arc Dream Publishing | Delta Green |
| God's Eye | APU8169 | 2024 | Arc Dream Publishing | Delta Green |
| God's Tears | | Aug 2024 | Chaosium | Call of Cthulhu (Now) |
 God's Teeth | APU8123 | 2023 | Arc Dream Publishing | Delta Green |
| Goddess | | 1992 | Self Published | Call of Cthulhu (Now) |
| The Gods Hate Me | CHA0402 | 2011 | Chaosium | Call of Cthulhu (Invictus) |
| Gods in the Void | RGG4HP0110 | 2015 | Rogue Genius Games | Pathfinder |
| Gods, Demi-Gods and Heroes | 2006 | 1976 | TSR | Dungeons and Dragons |
| Gold Fever * | | Sep 2022 | Chaosium | Call of Cthulhu (Classic) |
| The Golden Dawn | PAG1004 | 1996 | Pagan Publishing | Call of Cthulhu (Gaslight) |
| Golden Tango | | Sep 2023 | Self Published | Achtung! Cthulhu |
| Goliriad the Speaker | | Mar 2018 | Tomb Of Nyarlathotep Games | Call of Cthulhu (Classic) |
| The Good Boys | | Sep 2020 | Chaosium | Call of Cthulhu (Classic) |
| The Good Games Guide | 1 | Win 1985 | Games Workshop | Call of Cthulhu (WWII) |
| The Good Life | APU8129 | 2024 | Arc Dream Publishing | Delta Green |
| Good Vibes Only | | Aug 2022 | Chaosium | Call of Cthulhu (Now) |
| Goodman Games Gen Con 2014 Programme Guide | | 2014 | Goodman Games | Call of Cthulhu (Classic) |
| Goodnight Vienna | | Mar 2023 | Chaosium | Call of Cthulhu (WWII) |
| Gotham Legion | | 2010 | Self Published | Call of Cthulhu (Gaslight) |
| GOZU | | Jun 2020 | Chaosium | Call of Cthulhu (Strange Aeons) [17th Century] |
| Grace Under Pressure | PAG2100 | 1993 | Pagan Publishing | Call of Cthulhu (Now) |
| The Grand Grimoire of Cthulhu Mythos Magic | CHA23141 | 2017 | Chaosium | Call of Cthulhu (Classic) |
| Grand Providence Hotel | | 2012 | Self Published | Monsters and Other Childish Things |
| A Grandiose Disaster | ndp480 | 2017 | Interactivities Ink | A Grandiose Disaster |
| Grandma's Cookies | | Apr 2023 | Chaosium | Call of Cthulhu (Classic) |
| Grave Consequences | SL18 | 2016 | Fantasy Flight Games | Elder Sign |
| Grave Robbers | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) |
| Graven Images * | | 1993 | Pagan Publishing | [None Listed] |
| The Great American Dynasty | | Sep 2023 | Chaosium | Call of Cthulhu (Now) |
| Great Cthulhu | RGGSLEM0065 | 2019 | Rogue Genius Games | Pathfinder (Starfinder) |
| 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 Healer | | Jul 2021 | Chaosium | Call of Cthulhu (Now) |
| Great Old One Pack Four | CW-GOO4 | 2017 | Petersen Games | Cthulhu Wars |
| Great Old One Pack One | CW-GOO1 | 2015 | Petersen Games | Cthulhu Wars |
| Great Old One Pack Three | CW-GOO3 | 2015 | Petersen Games | Cthulhu Wars |
| Great Old One Pack Two | CW-GOO2 | 2015 | Petersen Games | Cthulhu Wars |
| The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic) |
| Great Old Ones | | 2006 | Warp Spawn Games | Great Old Ones |
| The Great Old Ones | | 2021 | Matagot | Kemet: Blood and Sand |
| Great Old Ones of Porphyra | PRG009 | 2018 | Purple Duck Games | Porphyra |
| Great Old Ones Poster | CHA9305 | | Chaosium | None |
| The Great Race of Yith | | 2018 | Sixpence Games | Cultists of Cthulhu |
| The Great Trap | | Feb 2021 | Chaosium | Call of Cthulhu (Classic) |
| The Great Weird War | | 2015 | Self Published | Call of Cthulhu (WWI) |
| A Greater Goal | | Oct 2020 | Chaosium | Call of Cthulhu (Classic) |
| Green and Pleasant Land * | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic) |
| The Green Book of Murthock | | 2017 | Drakat Games | Call of Cthulhu (Classic) |
| The Green Door | | Jun 2023 | Chaosium | Call of Cthulhu (Classic) |
| The Green Fairy * | SKP0829 | 2008 | Skirmisher Publishing | Call of Cthulhu (Classic) |
| A Green Jewel They Must Possess | | 2016 | Kort'thalis Publishing | The Outer Presence |
| A Green, Unplesant Land | | 2016 | Self Published | Call of Cthulhu (Classic) |
| Greenbox | 0 | Dec 2017 | Self Published | Delta Green |
| Grieving Skies | | Sep 2021 | Chaosium | Call of Cthulhu (Classic) |
| The Grim Occupation | | Jun 2019 | Chaosium | Call of Cthulhu (WWII) |
| Grimoire of Terror II | MUH0010351 | Oct 2023 | Modiphius Entertainment | Achtung! Cthulhu |
| A Grimoire of Terror! | MUH0010322 | 2022 | Modiphius Entertainment | Achtung! Cthulhu |
| Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic) |
| The Grimscribe's Puppets * | MRP0023 | 2013 | Miskatonic River Press | None |
| The Grindhouse Volume 1 | | Sep 2021 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Strange Aeons) [1974] |
| The Grindhouse Volume 2 | | Oct 2021 | Chaosium | Call of Cthulhu (Strange Aeons) [1977] |
| The Grindhouse Volume 3 | | Nov 2021 | Chaosium | Call of Cthulhu (Strange Aeons) [1980] |
| The Grindhouse Volume 4 | | Jun 2023 | Chaosium | Call of Cthulhu (Strange Aeons) [1974] |
| The Grindhouse: Holiday Special | | Nov 2021 | Chaosium | Call of Cthulhu (Now) |
| The Grindhouse: Ultimate Collection | | Aug 2022 | Chaosium | Call of Cthulhu (Now), Call of Cthulhu (Strange Aeons) [1980] |
| The Grotesque | | Sep 2024 | Chaosium | Call of Cthulhu (Gaslight) |
| Ground Zero | EX02 | 2008 | Self Published | Call of Cthulhu (Rising) |
| The Gruen Transfer | | Jul 2018 | Chaosium | Call of Cthulhu (Now) |
| Guardians of Blasphemous Knowledge | | 2013 | Cakebread and Walton | Clockwork and Chivalry, Dark Streets |
| Guardians of Easter Island | | Dec 2019 | Chaosium | Call of Cthulhu (Now) |
| Guardians of the Abyss * | AHC27 | 2018 | Fantasy Flight Games | Arkham Horror: The Card Game |
| Guess Who's Coming to Dinner? | SP1003 | 2011 | Stardust Publications | Dark Aeons |
| Guide to Afghanistan | TAG20304 | 2020 | Triple Ace Games | Leagues of Adventure |
| Guide to Cumbria | TAG20302 | 2019 | Triple Ace Games | Leagues of Adventure |
| Guide to North Africa | MUH01052CS | 2014 | Modiphius Entertainment | Call of Cthulhu (Achtung!), Savage Worlds (Achtung!) |
| Guide to the Caribbean | | 2018 | Golden Goblin Press | Call of Cthulhu (Classic) |
| Guide to the Cult of Shub Niggurath | | 2015 | Wayward Rogues Publishing | Pathfinder |
| Guide to the Cult of Shub Niggurath * | | 2016 | Wayward Rogues Publishing | Pathfinder |
| Guide to the Eastern Front | MUH01053CS | 2014 | Modiphius Entertainment | Call of Cthulhu (Achtung!), Savage Worlds (Achtung!) |
| Guide to the Pacific Front | MPS01051CS | 2014 | Modiphius Entertainment | Call of Cthulhu (Achtung!), Savage Worlds (Achtung!) |
| gwthomas.org | | | Self Published | Call of Cthulhu (Classic) |