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TitlePagesPublicationCodeDatePublisherSystem (Setting)
Card I Am It And It Is IEvent (U)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Scenario I Am Not Dead Yet!2001Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Boardgame I Am ProvidenceBoardgame I Am Providence 2014 Self PublishedI Am Providence
Boardgame I Am the Fourth WallBoardgame I Am the Fourth Wall 2019 Slinky Gibbon GamesI Am the Fourth Wall
Rules I am Under the Command of OthersWebsite House of Tindalosn/aSelf PublishedMythos
Card I Got the Part!Event (F)Cards Rosemary's Babyn/aSelf PublishedMythos
Scenario I Hate My Job *2013Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Rules I Look Like What?eZine Chaosium Digestv23n06Mar 1998 ChaosiumMythos
Scenario I See a Bird. No Wait … a Byakhee2001Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Scenario I Want a New Drug57Magazine Interface6 1992 Prometheus PublishingCall of Cthulhu (Cyberpunk)
Scenario I Want to Break Free2020Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Scenario I Want to PlayPDF I Want to PlayFXC-07 2019 Stygian FoxCall of Cthulhu (Now)
Scenario I Want You to Kill the Ice Cream Man233-240PDF 40 Adventures for Call of Cthulhu 2002 Self PublishedCall of Cthulhu (Now)
Scenario I Want You to Kill the Ice Cream ManeZine Chaosium Digestv26n04Jul 1998 ChaosiumCall of Cthulhu (Now)
Scenario I Want You to Kill the Ice Cream Man1-8PDF I Want You to Kill the Ice Cream Man 2000 Self PublishedCall of Cthulhu (Now)
Scenario I Want You to Kill the Ice Cream Man7-15eZine Opifex Bimonthly17Jan 1999 Self PublishedCall of Cthulhu (Now)
Rules I Was a PC Detective, or Can You Find Cthulhu in Three Easy Lessons (If That's Your Idea of a Good Time)1, 22-23Fanzine Game's Afoot9 1992 Zirlinson PublicationsCall of Cthulhu (Classic)
Scenario I was a Teenage Cthulhu Chaser!72-95Magazine The Unspeakable Oath8/9Jun 1993 Pagan PublishingCall of Cthulhu (Atomic)
Card Ia! Ia!Event (F)Cards The Thousand YoungCT65 2015 Fantasy Flight GamesCall of Cthulhu LCG
Card Ia! Ia! Shudde M'ell!Event (F)Cards Aspirations of AscensionCT43 2011 Fantasy Flight GamesCall of Cthulhu LCG
Boardgame Iaa! Cthulhu! Fhtagn!Boardgame Iaa! Cthulhu! Fhtagn! 2016 Sphinx SpeileverlagIaa! Cthulhu! Fhtagn!
Card Ian HardawayCharacter (F)Cards The Sleeper BelowCT63 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card IatrophobiaEvent (R)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card Ibbix the HarbormasterAlly (R)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Card Ibrahim AminAlly (C)Cards Legends of the NecronomiconCAO1303-1 1996 ChaosiumMythos
Scenario The Icarus Project88-119Magazine Worlds of Cthulhu2Feb 2005 Pegasus PressCall of Cthulhu (Strange Aeons: Far Future)
Scenario Ice Cream ManPDF Ice Cream ManMay 2019 ChaosiumCall of Cthulhu (Now)
Scenario The Ice of Paulet 7Aug 2018Website Reckoning of the Deadn/aSelf PublishedCall of Cthulhu (Strange Aeons: Far Future)
Card Ice ShaftSupport (F)Cards Never NightCT50 2011 Fantasy Flight GamesCall of Cthulhu LCG
Card Ice StormEvent (F)Cards For the Greater GoodCT64 2015 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Iceland126-151Softback The Two-Headed SerpentCHA23125 2017 ChaosiumCall of Cthulhu (Classic)
Card Icon of the Nameless Pharaoh, Lost from HistorySupport (R)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Rules The IconoduleOct 2020Website shoggoth.netn/aSelf PublishedCall of Cthulhu (Classic)
Scenario The Icosahedron - A History76-77Softback Lurking Fears0001Jan 1990 Triad EntertainmentsCall of Cthulhu (Classic)
Unknown The IDEAL ConcealeZine The Dark Times1Aut 2017 Self PublishedCall of Cthulhu (Now) , Dark Conspiracy
Rules Ideas for CybercthulhueZine Chaosium Digestv02n11Jun 1993 ChaosiumCall of Cthulhu (Cyberpunk)
Rules Idiosynxratic Magic Expanded28-32Softback Rough MagicksPELGT09 2009 Pelgrane PressTrail of Cthulhu
Card Idol from R'lyehSupport (C)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Idol of BokrugArtifact (C)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Card Idol of the AbominationSupport (F)Cards The Path to Y'ha-nthleiCT24 2009 Fantasy Flight GamesCall of Cthulhu LCG
Scenario The Idol of ThothPDF The Idol of ThothDec 2017 Stygian FoxCall of Cthulhu (Classic)
Card If I Ran the ZoogAdventure (U)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Background If I Ran the Zoog DeckWebsite Robo's Mythos CCG Web Pagen/aSelf PublishedMythos
Scenario If Only In My Dreams2017Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Boardgame Igor Ichor Promo CardBoardgame Igor Ichor Promo CardMar 2009 Steve Jackson GamesMunchkin
Boardgame Ikiaq *Boardgame Arkham Nights 2018 Cards 2018 Fantasy Flight GamesArkham Horror: The Card Game
Card Il Mondo OccultoLocation (R)Cards Expeditions of Miskatonic UniversityCAO1301-1 1996 ChaosiumMythos
Card IlarnekLocation (C)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Scenario Ilek-Vad196-227Softback The Sense of the Sleight of Hand ManAPU8001 2013 Arc Dream PublishingCall of Cthulhu (Dreamlands)
Card Ill OmenEvent (R)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Novelty Ill Omens Art PackPDF Ill Omens Art PackDec 2017 ChaosiumCall of Cthulhu (Classic)
Scenario The Ill-Made Knight *PDF The Once and Future King 1999 Self PublishedCall of Cthulhu (Classic)
Scenario The Illuminated Order41-46Magazine Abyss Quarterly51 1993 Ragnarok GamesCall of Cthulhu (Classic)
Rules Illuminating Manuscripts: The G’harne Fragments19-22Fanzine Polaris1Sum 1987 Self PublishedCall of Cthulhu (Classic)
Scenario The Ilsley Variant37-48Softback Dead Leaves FallCHA0406 2011 ChaosiumCall of Cthulhu (Classic)
Card I'm Surrounded by WitchesAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario Images of DoomSoftback Tales of Terror (II)PAG2102 1996 Pagan PublishingCall of Cthulhu (Classic)
Card ImmurementEvent (F)Cards Denizens of the UnderworldCT62 2014 Fantasy Flight GamesCall of Cthulhu LCG
Rules ImperfectsOct 2005Website shoggoth.netn/aSelf PublishedCall of Cthulhu (Classic)
Card Implant FearEvent (U)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Implant FearEvent (F)Cards Secrets of ArkhamCT32 2010 Fantasy Flight GamesCall of Cthulhu LCG
Background Important Members27-34Softback The Golden DawnPAG1004 1996 Pagan PublishingCall of Cthulhu (Gaslight)
Scenario An Impossible MurderSoftback More Tales of Terror PAG2105 2000 Pagan PublishingCall of Cthulhu (Classic)
Card Imprisoned With the PharaohsAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario Impulsive54Softback Dark PassionsWDF23200 2008 WildFire GamesFramewerk (CthulhuTech)
Scenario In a City of Bells and TowersFanzine Dagon22,23Sep 1988 Self PublishedCall of Cthulhu (Classic)
Scenario In a City of Bells and TowersC:117-130Boxed Horror on the Orient ExpressCHA23130 2014 ChaosiumCall of Cthulhu (Classic)
Scenario In a City of Bells and TowersC:121-129Boxed Horror on the Orient ExpressCHA2331-X 1991 ChaosiumCall of Cthulhu (Classic)
Scenario In a Different Light *1-34PDF In a Different Light 2011 Cthulhu RebornCall of Cthulhu (Classic)
Scenario In A Different Light, Part 1eZine Chaosium Digestv29n12Jan 2000 ChaosiumCall of Cthulhu (Classic)
Scenario In A Different Light, Part 2eZine Chaosium Digestv30n01Jan 2000 ChaosiumCall of Cthulhu (Classic)
Scenario In A Different Light, Part 3eZine Chaosium Digestv30n02Jan 2000 ChaosiumCall of Cthulhu (Classic)
Scenario In A Different Light, Part 4eZine Chaosium Digestv30n03Jan 2000 ChaosiumCall of Cthulhu (Classic)
Scenario In A Different Light, Part 5eZine Chaosium Digestv30n04Jan 2000 ChaosiumCall of Cthulhu (Classic)
Card In an Unmarked GraveEvent (F)Cards Sleep of the DeadCT30 2009 Fantasy Flight GamesCall of Cthulhu LCG
Background In and Out of the Academic World64-67Softback Miskatonic UniversityCHA2352 1995 ChaosiumCall of Cthulhu (Classic)
Rules In Captivity34-38Softback Guide to the Pacific FrontMPS01051CS 2014 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Card In Darkness, PowerAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Background In From the ColdPDF In From the Cold 2017 Golden Goblin PressCall of Cthulhu (Classic)
Scenario In Media Res146-161Softback Out of the VaultPAG1009 2002 Pagan PublishingCall of Cthulhu (Classic)
Scenario In Media Res56-63Magazine The Unspeakable Oath10Jan 1994 Pagan PublishingCall of Cthulhu (Now)
Rules In Media Res Live Action Roleplaying Report25Magazine The Unspeakable Oath11Jan 1995 Pagan PublishingCall of Cthulhu (Now)
Scenario In Nomine DiabolisSoftback More Tales of Terror PAG2105 2000 Pagan PublishingCall of Cthulhu (Classic)
Card In RagsSupport (C)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Scenario In Requiem174-175Softback Cthulhu ApocalypsePELGT40 2015 Pelgrane PressTrail of Cthulhu
Scenario In Requiem63-64Softback Slaves of the MotherPELGT31 2014 Pelgrane PressTrail of Cthulhu
Background In Rerum Supernatura189-192Softback Call of CthulhuCHA2336 1992 ChaosiumCall of Cthulhu (Classic)
Background In Rerum Supernatura108-113Softback Call of CthulhuCHA2386 1999 ChaosiumCall of Cthulhu (Classic)
Scenario In Search of Sanity4-55Softback In Search of SanityPZO90109 2016 Paizo PublishingPathfinder
Background In The Beginning16-25Softback Beyond the Mountains of MadnessCHA2380 1999 ChaosiumCall of Cthulhu (Classic)
Scenario In The CardsOct 2009Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Boardgame In the Clutches of ChaosBoardgame In the Clutches of ChaosAHC34 2019 Fantasy Flight GamesArkham Horror: The Card Game
Scenario In the Clutches of Mami Wata59-72Softback Secrets of the CongoCHA0387 2010 ChaosiumCall of Cthulhu (Classic)
Card In the Court of the DragonConspiracy (F)Cards Touched by the AbyssCT58 2012 Fantasy Flight GamesCall of Cthulhu LCG
Scenario In the Forests, the ShadowseZine Chaosium Digestv24n03Mar 1998 ChaosiumCall of Cthulhu (Classic)
Scenario In the Forests, The ShadowsSoftback More Tales of Terror PAG2105 2000 Pagan PublishingCall of Cthulhu (Classic)
Rules In the Grip of Madness27-34Magazine Worlds of Cthulhu2Feb 2005 Pegasus PressCall of Cthulhu (Classic)
Card In the GutterEvent (U)Cards Forgotten Cities 2005 Fantasy Flight GamesCall of Cthulhu CCG
Background In the Matter of Mr Barnabas MarshWebsite House of Tindalosn/aSelf PublishedMythos
Track In The Mountain01:00Recording Eternal Lies SuitePELGT17 2010 Pelgrane PressTrail of Cthulhu
Card In The Nick of TimeEvent (U)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Background In the Service of One's Country34-47Softback Investigator's Guide to the Secret WarMPS01031CS 2013 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Scenario In the Shadow of the Valley *2019Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Scenario In the Shadows of Death24-39Softback In the ShadowsCHA2357 1995 ChaosiumCall of Cthulhu (Classic)
Card In the VaultAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario In the Wake of Gods2018Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Card In the Wake of the SleeperEvent (F)Cards The Order of the Silver TwilightCT33 2010 Fantasy Flight GamesCall of Cthulhu LCG
Scenario In the Watches of the Night2005Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Scenario In the Waters of Wyman8-23Magazine White Wolf4Oct 1986 White Wolf GamesCall of Cthulhu (Classic)
Scenario In the Woods, No One Can Hear You Screaming54-55Softback Dark PassionsWDF23200 2008 WildFire GamesFramewerk (CthulhuTech)
Boardgame In Too DeepBoardgame In Too DeepAHC53 2020 Fantasy Flight GamesArkham Horror: The Card Game
Scenario In Whom We Trust1996Website Four Letters At Randomn/aSelf PublishedCall of Cthulhu (Classic)
Scenario In Whom We Trust *1-33PDF In Whom We Trust 2016 Self PublishedCall of Cthulhu (Classic)
Scenario Inca Unconquered1998Website Ubarn/aSelf PublishedCall of Cthulhu (Classic)
Scenario An Incident at the Border86-103Hardback Mythos ExpeditionsPELGT37 2014 Pelgrane PressTrail of Cthulhu
Scenario Incident in Iraq171-180Softback Walker in the WastesPAG1002 1994 Pagan PublishingCall of Cthulhu (Classic)
Card Incomprehensible MachineSupport (R)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Inconspicuous ZoogCharacter (F)Cards Sleep of the DeadCT30 2009 Fantasy Flight GamesCall of Cthulhu LCG
Scenario An Inconvenience to Travellers1997Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Rules Incredible Incunabula: Fifty Works of Arcane and Forgotten Lore for Call of Cthulhu44-47Magazine Space Gamer86Jul 1989 Steve Jackson GamesCall of Cthulhu (Classic)
Card Incriminating EvidenceEvent (F)Cards Scooby Doo Set 3n/aSelf PublishedMythos
Scenario The Incriminating Letter1-10PDF The Incriminating Letter 2003 Self PublishedCall of Cthulhu (Now)
Card IndebtedSupport (F)Cards Denizens of the UnderworldCT62 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card Independence SquareSupport (C)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Independent OperatorCharacter (U)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Indian Picture RockLocation (F)Cards Scooby Doo Set 2Mar 1999 Self PublishedMythos
Rules Indiana Jones for CoCeZine Chaosium Digestv23n02Feb 1998 ChaosiumCall of Cthulhu (Classic)
Background Indigo: After the End of the WorldPDF Indigo: After the End of the WorldFeb 2018 ChaosiumCall of Cthulhu (Now)
Card Induce TerrorEvent (F)Cards The Mark of MadnessCT66 2015 Fantasy Flight GamesCall of Cthulhu LCG
Card InducementSupport (U)Cards Forgotten Cities 2005 Fantasy Flight GamesCall of Cthulhu CCG
Fiction Industrial Espionage94-95Softback Unveiled ThreatsWDF23600 2011 WildFire GamesFramewerk (CthulhuTech)
Scenario The Inevitable2016Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Card Infected by MadnessEvent (C)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Infected by MadnessEvent (F)Cards Secrets of ArkhamCT32 2010 Fantasy Flight GamesCall of Cthulhu LCG
Card Infernal ObsessionSupport (F)Cards The Antediluvian DreamsCT21 2009 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Inferno1-32Softback Whispers in the Dark0003Oct 1993 Triad EntertainmentsCall of Cthulhu (Now)
Scenario InfestWebsite Infestn/aSelf PublishedCall of Cthulhu (Now)
Scenario Infestation1997Website Ubarn/aSelf PublishedCall of Cthulhu (Classic)
Card Infested CemeterySupport (U)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Boardgame Infinite Gulfs of DarknessBoardgame Infinite Gulfs of Darkness 2021 LudonovaArkham Noir
Card InfirmarySupport (F)Cards Words of PowerCT54 2012 Fantasy Flight GamesCall of Cthulhu LCG
Card InfluenzaEvent (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card InformantCharacter (C)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Background Inhabitants of the Realms216-262Softback Secrets of JapanCHA2392 2005 ChaosiumCall of Cthulhu (Classic)
Scenario The Inheritance33-43Softback Horror Stories From the Red RoomCHA0413 2013 ChaosiumCall of Cthulhu (Classic)
Scenario InheritancePDF Inheritance 2019 ChaosiumCall of Cthulhu (Classic)
Scenario The Inheritor5-28Softback The Thing at the ThresholdCHA2339 1992 ChaosiumCall of Cthulhu (Classic)
Scenario Initialization2018Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Card Initiate of DagonCharacter (F)Cards The Sleeper BelowCT63 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card Initiate of Huang HunCharacter (F)Cards Curse of the Jade EmperorCT48 2011 Fantasy Flight GamesCall of Cthulhu LCG
Card InitiationEvent (F)Cards The Order of the Silver TwilightCT33 2010 Fantasy Flight GamesCall of Cthulhu LCG
Card Initiation of GlaakiEvent (F)Cards Aspirations of AscensionCT43 2011 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Ink and BloodFeb 2017Website shoggoth.netn/aSelf PublishedCall of Cthulhu (Classic)
Rules Ink ManOct 2019Website shoggoth.netn/aSelf PublishedCall of Cthulhu (Classic)
Background Inland Waterways37Softback Green and Pleasant LandCHA2320 1987 ChaosiumCall of Cthulhu (Classic)
Card Inmasking the VillianEvent (F)Cards Scooby Doo Set 1n/aSelf PublishedMythos
Scenario An Inner CallPDF An Inner CallSep 2020 ChaosiumCall of Cthulhu (Classic)
Background The Inner Order Curiculum43-49Softback The Golden DawnPAG1004 1996 Pagan PublishingCall of Cthulhu (Gaslight)
Card Inner SanctumSupport (U)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Scenario The Innocent55-84Softback Caligo Accendendum TournamentCHA0309 2004 ChaosiumCall of Cthulhu (Dark Ages)
Rules The InnocentsOct 2005Website shoggoth.netn/aSelf PublishedCall of Cthulhu (Classic)
Unknown Innsmouth 2000101-105Magazine Ye Booke of Tentacles3 2000 The Chaos SocietyCall of Cthulhu (Now)
Scenario The Innsmouth Connection31-43Softback Before the FallCHA2377 1998 ChaosiumCall of Cthulhu (Classic)
Boardgame The Innsmouth ConspiracyBoardgame The Innsmouth ConspiracyAHC52 2020 Fantasy Flight GamesArkham Horror: The Card Game
Card Innsmouth CourierLocation (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card The Innsmouth Cover-upAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Background Innsmouth Curios46-52Magazine The Arkham Gazette2Nov 2013 Sentinel Hill PressCall of Cthulhu (Classic)
Background The Innsmouth DeckeZine Chaosium Digestv21n06Sep 1997 ChaosiumMythos
Background The Innsmouth DeckWebsite Robo's Mythos CCG Web Pagen/aSelf PublishedMythos
Background Innsmouth DeckWebsite Thastygliax's Vaultn/aSelf PublishedMythos
Boardgame Innsmouth EscapeBoardgame Innsmouth EscapeTLC3401 2008 Twilight CreationsInnsmouth Escape
Card Innsmouth ExpressAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Background Innsmouth Gold53-61Magazine The Arkham Gazette2Nov 2013 Sentinel Hill PressCall of Cthulhu (Classic)
Boardgame Innsmouth Horror ExpansionBoardgame Innsmouth Horror ExpansionVA57 2009 Fantasy Flight GamesArkham Horror
Scenario Innsmouth Independence Day133-178Softback The Eldritch New England Holiday CollectionGGP2005 2020 Golden Goblin PressCall of Cthulhu (Classic)
Scenario The Innsmouth Lighthouse1PDF The Innsmouth Lighthouse 2009 Self PublishedRisus
Card The Innsmouth LookSupport (C)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Innsmouth LookAdventure (F)PDF Eric Johnson Mythos Collectionn/aSelf PublishedMythos
Card The Innsmouth LookEvent (R)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card Innsmouth ShoggothCharacter (R)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card The Innsmouth ThreatStory (F)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card The Innsmouth ThreatStory (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card The Innsmouth ThreatStory (F)Cards Secrets of ArkhamCT32 2010 Fantasy Flight GamesCall of Cthulhu LCG
Card Innsmouth TroublemakerCharacter (F)Cards Call of Cthulhu The Card GameCT18 2008 Fantasy Flight GamesCall of Cthulhu LCG
Card Innsmouth TroublemakerCharacter (C)Cards Forbidden Relics 2004 Fantasy Flight GamesCall of Cthulhu CCG
Background Innsmouth Weapons DeckeZine Chaosium Digestv20n11Aug 1997 ChaosiumMythos
Background Innsmouth Weapons DeckWebsite Robo's Mythos CCG Web Pagen/aSelf PublishedMythos
Background Innsmouth's Burying Grounds9-15Magazine The Arkham Gazette2Nov 2013 Sentinel Hill PressCall of Cthulhu (Classic)
Scenario Inquanok105-142Softback The Sense of the Sleight of Hand ManAPU8001 2013 Arc Dream PublishingCall of Cthulhu (Dreamlands)
Card Inquisitive Chinese Intellectual/Morose Veteran Of The Great WarInvestigator (F)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card Insane in the Membrane!Adventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card Insane InsightSpell (F)Cards Sesqua Valleyn/aSelf PublishedMythos
Scenario InsanitariumPDF Insanitarium 2019 ChaosiumCall of Cthulhu (Classic)
Rules Insanity and Faith in Averoigne85-88Magazine Worlds of Cthulhu4Jan 2006 Pegasus PressCall of Cthulhu (Dark Ages)
Background Insanity, Society and the Law43-50Softback Taint of MadnessCHA2354 1995 ChaosiumCall of Cthulhu (Classic)
Card Insect From ShaggaiMonster (F)Cards UnlimitedCAO1306-1 1997 ChaosiumMythos
Card Insect From ShaggaiMonster (F)Cards UnlimitedCAO1306-1 1997 ChaosiumMythos
Card Insect SwarmCharacter (F)Cards The Thing from the ShoreCT23 2009 Fantasy Flight GamesCall of Cthulhu LCG
Card Inside InformationEvent (C)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Inside InformationEvent (F)Cards Call of Cthulhu The Card GameCT18 2008 Fantasy Flight GamesCall of Cthulhu LCG
Card Inside ManCharacter (F)Cards The Unspeakable PagesCT57 2012 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Inside Out49Magazine The Whisperer5Aut 2003 Severn Valley PressCall of Cthulhu (Now)
Background Inside the Reich15-21Softback Keeper's Guide to the Secret WarMPS01032CS 2013 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Card Inside-Out HoursEvent (U)Cards Forgotten Cities 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Insidious Ululation of the Invisible SupplicantsSpell (U)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Card Inspector John LeGrasseCharacter (F)Cards The Sleeper BelowCT63 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card Inspector John Legrasse, Cop in the KnowCharacter (U)Cards Unspeakable Tales 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Inspector Li FlintCharacter (F)Cards Curse of the Jade EmperorCT48 2011 Fantasy Flight GamesCall of Cthulhu LCG
Rules Instability in the MythoseZine Chaosium Digestv27n05Jan 1999 ChaosiumMythos
Card Instability in the MythosEvent (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card Instability in the MythosEvent (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Scenario Insta-Plots133-134Softback Cthulhu CasebookCHA3305 1990 ChaosiumCall of Cthulhu (Classic)
Background The Institute for Paranormal Studies: A Cult Profile31-40Magazine Interface6 1992 Prometheus PublishingCall of Cthulhu (Cyberpunk)
Background Institutions, Organizations and Power Groups in Japan166-178Softback Secrets of JapanCHA2392 2005 ChaosiumCall of Cthulhu (Classic)
Card Instruments of Glass and MetalSupport (U)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Insubstantial InsectCharacter (U)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Scenario Integratron2010Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Card Intelligence AgentCharacter (F)Cards For the Greater GoodCT64 2015 Fantasy Flight GamesCall of Cthulhu LCG
Background Intelligence Report #57431997Website delta-green.comn/aPagan PublishingCall of Cthulhu (Delta Green)
Rules Inter Solar System Species IndexeZine Chaosium Digestv07n07Sep 1994 ChaosiumCall of Cthulhu (Classic)
Background Interdimensional Sorcerer's ApprenticeeZine Chaosium Digestv21n11Sep 1997 ChaosiumMythos
Card Inter-dimensional TransporterSupport (F)Cards The Twilight BeckonsCT40 2011 Fantasy Flight GamesCall of Cthulhu LCG
Card The Interesting ShopAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card The Interesting ShopAdventure (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Rules Interface 19.4051-55Softback Interface 19.40MUH050027AC 2015 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Interface Zero , Savage Worlds (Achtung!)
Background Interim Period 1930-193151Softback Coming Full CirclePAG1003 1995 Pagan PublishingCall of Cthulhu (Classic)
Background Interim Period 1933-193483Softback Coming Full CirclePAG1003 1995 Pagan PublishingCall of Cthulhu (Classic)
Background Interim Period 1936-1939107Softback Coming Full CirclePAG1003 1995 Pagan PublishingCall of Cthulhu (Classic)
Card The InternetTome (C)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Card INTERPOL Italian HeadquartersLocation (C)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Card Interrogation CenterSupport (F)Cards The Spawn of the SleeperCT19 2009 Fantasy Flight GamesCall of Cthulhu LCG
Card InterrogatorCharacter (F)Cards For the Greater GoodCT64 2015 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Intersections166-226Softback World War Cthulhu: Cold WarCB71970 2016 Cubicle 7Call of Cthulhu (Cold War)
Card Interstellar MigrationEvent (F)Cards The Key and the GateCT60 2013 Fantasy Flight GamesCall of Cthulhu LCG
Card Interstellar VisitorCharacter (R)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card InterventionEvent (F)Cards The Spoken CovenantCT36 2010 Fantasy Flight GamesCall of Cthulhu LCG
Background Interviews with Larry DiTillio and Lynn Willis11-14Hardback The Masks of Nyarlathotep Companion (Limited)60-MONC-08 2016 Sixtystone PressNone
Background Interviews with Larry DiTillio and Lynn Willis11-14Softback The Masks of Nyarlathotep Companion (Unlimited)60-MONC-03 (?) 2016 Sixtystone PressNone
Scenario Intimate Encounters122-135Softback The Things We Leave BehindTTWLB 2016 Stygian FoxCall of Cthulhu (Now)
Card IntimidateEvent (C)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IntimidateEvent (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IntimidateEvent (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IntimidateEvent (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IntimidateEvent (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IntimidateEvent (F)Cards Secrets of ArkhamCT32 2010 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Into a Dark HeartPDF Into a Dark HeartAug 2021 ChaosiumCall of Cthulhu (Classic)
Scenario Into the DarknessSoftback Tales of Terror (I) 1990 Pagan PublishingCall of Cthulhu (Classic)
Scenario Into the Darkness31-32PDF Tales of Terror (III)n/aSelf PublishedCall of Cthulhu (Classic)
Scenario Into the Darkness1990Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Card Into the DeepEvent (R)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Scenario Into the Depths178-195Softback Assault on the Mountains of MadnessMUH050029 2013 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Scenario Into the East73-82Softback Nocturnum: Deep SecretsCC03 1999 Fantasy Flight GamesCall of Cthulhu (Now)
Rules Into the Fray159-170Softback Keeper's Guide to the Secret WarMPS01032CS 2013 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Scenario Into the Mouth of Truth49-67Softback Shadows of AtlantisMUH01022CS 2015 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Scenario Into the Realm of the Wind-Walker59-72Softback Walker in the WastesPAG1002 1994 Pagan PublishingCall of Cthulhu (Classic)
Scenario Into the Throat of the Beast7-27Softback The Arkham EvilT-1 1983 Theatre of the Mind EnterprisesCall of Cthulhu (Classic)
Scenario Into the Wilds, Into the DepthsHardback A Cold Fire WithinCHA23162 2019 ChaosiumCall of Cthulhu (Classic)
Card Into the WoodsConspiracy (F)Cards Lost RitesCT56 2012 Fantasy Flight GamesCall of Cthulhu LCG
Card An Intriguing OfferSupport (R)Cards Eldritch Edition 2005 Fantasy Flight GamesCall of Cthulhu CCG
Rules Introducing Call of Cthulhu AdventureseZine Chaosium Digestv24n03Mar 1998 ChaosiumCall of Cthulhu (Classic)
Rules Introduction24-34Softback Call of CthulhuCHA23106 2005 ChaosiumCall of Cthulhu (Classic)
Background Introduction23-35Softback Call of CthulhuCHA2386 1999 ChaosiumCall of Cthulhu (Classic)
Rules Introduction4PDF Call of Cthulhu 7th Edition Quick StartCHA23131 2013 ChaosiumCall of Cthulhu (Classic)
Fiction Introduction4-9Softback De ProfundisCB71401 2010 Cubicle 7De Profundis
Background IntroductionWebsite Delta Green Anomaliesn/aSelf PublishedCall of Cthulhu (Delta Green)
Rules Introduction11-20Softback Eldritch SkiesBPI7500 2012 Battlefield PressUnisystem (Eldritch Skies)
Background Introduction5-9Softback Horror's HeartCHA2359 1996 ChaosiumCall of Cthulhu (Classic)
Rules Introduction10-17Hardback Investigator's HandbookCHA23136 2015 ChaosiumCall of Cthulhu (Classic)
Rules Introduction12-19Hardback Keeper RulebookCHA23135 2015 ChaosiumCall of Cthulhu (Classic)
Background Introduction7-46Softback Masks of NyarlathotepCHA23153 2018 ChaosiumCall of Cthulhu (Classic)
Background Introduction4-6Hardback The Masks of Nyarlathotep Companion (Limited)60-MONC-08 2016 Sixtystone PressNone
Background Introduction4-6Softback The Masks of Nyarlathotep Companion (Unlimited)60-MONC-03 (?) 2016 Sixtystone PressNone
Background Introduction5-16Softback Reign of TerrorCHA23149 2017 ChaosiumCall of Cthulhu (Strange Aeons)
Rules Introduction25-33Softback Secrets of JapanCHA2392 2005 ChaosiumCall of Cthulhu (Classic)
Rules Introduction9-30Softback Skirmish: Commander's SetMUH050454 2016 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Background Introduction4-19Softback Terror from the SkiesCHA23128 2012 ChaosiumCall of Cthulhu (Classic)
Background Introduction4-23Softback World War Cthulhu: Cold WarCB71970 2016 Cubicle 7Call of Cthulhu (Cold War)
Background Introduction4-8Softback World War Cthulhu: Cold War - Our American CousinsCB71973 2017 Cubicle 7Call of Cthulhu (Cold War)
Background Introduction4-7Softback World War Cthulhu: LondonCB71941 2016 Cubicle 7Call of Cthulhu (WWII)
Background Introduction8-19Softback World War Cthulhu: The Darkest HourCB71939 2013 Cubicle 7Call of Cthulhu (WWII)
Background Introduction1-5Softback Zero Point, Part 3 - Code of HonourMUH051257 2017 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Background Introduction and Orientation8-18Softback Tatters of the KingCHA23104 2006 ChaosiumCall of Cthulhu (Classic)
Scenario Introduction to 10th Century France21-34Softback The AbbeyCHA0088 2004 ChaosiumCall of Cthulhu (Dark Ages)
Background An Introduction to 1920s Scotland5-28Softback Shadows Over ScotlandCB7353 2011 Cubicle 7Call of Cthulhu (Classic)
Rules Introduction to the Game9-13Softback Lovecraftesque 2016 Black ArmadaLovecraftesque
Rules Introduction: Gazing into the Dark Mirror2-3Softback Dark MirrorCHA0338 2007 ChaosiumCall of Cthulhu (Classic)
Background Introduction: The Storm3-12Softback Children of the StormCHA0394 2010 ChaosiumCall of Cthulhu (Classic)
Scenario The Intruder Beyond TimeFeb 2018Website Reckoning of the Deadn/aSelf PublishedCall of Cthulhu (Now)
Card Intruder from BeyondCharacter (F)Cards The Twilight BeckonsCT40 2011 Fantasy Flight GamesCall of Cthulhu LCG
Scenario The Intruder WithinWebsite The Intruder Withinn/aSelf PublishedCall of Cthulhu (Classic)
Scenario Invasive Procedures4-35Softback Invasive ProceduresPELG09 2011 Pelgrane PressFear Itself , Trail of Cthulhu
Card Inventor of Strange Devices IAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card Inventor of Strange Devices IIAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card Inventor of Strange Devices IIIAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Background Investigating Postergeists33-40Softback Parapsycologist's HandbookCHA0085 2003 ChaosiumCall of Cthulhu (Classic) , Call of Cthulhu (Gaslight) , Call of Cthulhu (Now)
Background Investigating the Fate92-93Softback Delta Green Eyes OnlyPAG1013 2007 Pagan PublishingCall of Cthulhu (Delta Green)
Scenario The Investigation *89Softback Taint of MadnessCHA2354 1995 ChaosiumCall of Cthulhu (Classic)
Rules Investigative Abilities29-33PDF The Apocalypse MachinePELGT24 2011 Pelgrane PressTrail of Cthulhu
Rules Investigative Abilities30-34Softback Cthulhu ApocalypsePELGT40 2015 Pelgrane PressTrail of Cthulhu
Rules Investigative Abilities4-37Softback Keeper's Resource Book and ScreenPELGT04 2008 Pelgrane PressTrail of Cthulhu
Rules Investigative Feats128-129Magazine Worlds of Cthulhu2Feb 2005 Pegasus PressCall of Cthulhu (d20)
Background Investigative Horror in the Dark Ages98-105Softback Cthulhu Dark AgesCHA23143 2015 ChaosiumCall of Cthulhu (Dark Ages)
Card Investigative ReporterCharacter (U)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Rules The Investigator9-50Softback Player's GuidePELGT03 2007 Pelgrane PressTrail of Cthulhu
Rules The Investigator9-50Hardback Trail of CthulhuPELGT01 2007 Pelgrane PressTrail of Cthulhu
Rules Investigator Archetypes for ZgrozyPDF Investigator Archetypes for ZgrozyOct 2019 ChaosiumCall of Cthulhu (Classic)
Rules Investigator Creation6-26Softback Cthulhu Dark AgesCHA23143 2015 ChaosiumCall of Cthulhu (Dark Ages)
Card Investigator Domain 1Domain (F)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain 1Domain (F)Cards Eldritch Edition Premium Starter Set 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain 2Domain (F)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain 2Domain (F)Cards Eldritch Edition Premium Starter Set 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain 3Domain (F)Cards Arkham Edition 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain 3Domain (F)Cards Eldritch Edition Premium Starter Set 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain I1Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain I2Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain I3Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain M1Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain M2Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card Investigator Domain M3Domain (F)Cards Arkham Edition Premium Starter Set 2004 Fantasy Flight GamesCall of Cthulhu CCG
Boardgame Investigator Expansion PackBoardgame Investigator Expansion Pack 2020 Purple Meeple GamesCultistorm
Rules Investigator Occupations25-42Softback The 7th Edition Guide to Cthulhu InvictusGGP1801 2018 Golden Goblin PressCall of Cthulhu (Invictus)
Background Investigator Organizations122-145Hardback Investigator's HandbookCHA23136 2015 ChaosiumCall of Cthulhu (Classic)
Novelty Investigator Passports1-6PDF Investigator Passports 2019 base113 GamesCall of Cthulhu (Classic) , Trail of Cthulhu
Boardgame Investigator Promo Cards Boardgame Investigator Promo Cards 2017 Fantasy Flight GamesElder Sign
Rules Investigator Skills43-48Softback The 7th Edition Guide to Cthulhu InvictusGGP1801 2018 Golden Goblin PressCall of Cthulhu (Invictus)
Rules Investigator Templates76-81, 45Magazine The Black Seal2Mar 2003 Brichester University PressCall of Cthulhu (Now)
Rules InvestigatorseZine Chaosium Digestv01n04Feb 1993 ChaosiumCall of Cthulhu (Classic)
Background The Investigators74-76Softback Cthulhu ApocalypsePELGT40 2015 Pelgrane PressTrail of Cthulhu
Rules Investigators70-89Softback CthulhupunkSJG01695 1995 Steve Jackson GamesGURPS (CthulhuPunk)
Background The Investigators6-8Softback The Dead White WorldPELGT19 2011 Pelgrane PressTrail of Cthulhu
Boardgame InvestigatorsBoardgame Investigators 2019 Petersen GamesCthulhu Wars
Rules Investigators and Skill ProgressioneZine Chaosium Digestv17n09Dec 1996 ChaosiumCall of Cthulhu (Classic)
Rules Investigators as Tome AuthorseZine Chaosium Digestv23n02Feb 1998 ChaosiumCall of Cthulhu (Classic)
Background The Investigator's Gazeteer58-72Softback Kingdom of the BlindCHA0359 2008 ChaosiumCall of Cthulhu (Classic)
Background Investigator's Guide to 1920s New Orleans9-26Softback Tales of the Crescent CityGGP1401 2014 Golden Goblin PressCall of Cthulhu (Classic)
Rules Investigators in the Holy Land5-10Softback Dark CrusadesCHA0414 2013 ChaosiumCall of Cthulhu (Dark Ages)
Rules Investigator's Resources24-62Softback World War Cthulhu: Cold WarCB71970 2016 Cubicle 7Call of Cthulhu (Cold War)
Rules Investigator's Resources20-52Softback World War Cthulhu: The Darkest HourCB71939 2013 Cubicle 7Call of Cthulhu (WWII)
Scenario Invisible Sun20-67Softback Lost in the Lights60-NUK01 2013 Sixtystone PressCall of Cthulhu (Classic) , Call of Cthulhu (Now)
Scenario The Invitation2004Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Scenario An Invitation in YellowPDF An Invitation in YellowFeb 2018 ChaosiumCall of Cthulhu (Classic)
Scenario Invitation to Play9-19Fanzine Serendipity's Circle6Win 1995 Self PublishedCall of Cthulhu (Now) , Immortal: The Invisible War , Nephilim , The Whispering Vault
Scenario Invitation to the Dance19-38Softback The Primal StateCHA0344 2007 ChaosiumCall of Cthulhu (Classic)
Scenario Invitation to the Dance16-23Magazine The Whisperer5Aut 2003 Severn Valley PressCall of Cthulhu (Now)
Card Invocation of the AbyssEvent (F)Cards The Mark of MadnessCT66 2015 Fantasy Flight GamesCall of Cthulhu LCG
Scenario The Involuntary Witness *80Softback Taint of MadnessCHA2354 1995 ChaosiumCall of Cthulhu (Classic)
Background Io20-22Softback Jovian NightmaresCHA0367 2009 ChaosiumCall of Cthulhu (Rising)
Card IodCharacter (F)Cards For the Greater GoodCT64 2015 Fantasy Flight GamesCall of Cthulhu LCG
Card IpiutakSupport (F)Cards Seekers of KnowledgeCT59 2012 Fantasy Flight GamesCall of Cthulhu LCG
Scenario Ira IncensaPDF Ira IncensaMar 2021 ChaosiumCall of Cthulhu (Classic)
Card Iranon the ExplorerAlly (C)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Card IremLocation (F)Cards Antarctican/aSelf PublishedMythos
Card IremSupport (F)Cards The Sleeper BelowCT63 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card Irem, City of the PillarsSupport (R)Cards Forgotten Cities 2005 Fantasy Flight GamesCall of Cthulhu CCG
Card Irish ChannelSupport (F)Cards The Thousand YoungCT65 2015 Fantasy Flight GamesCall of Cthulhu LCG
Rules Irish Creatures of Legend44-50Softback Mysteries of IrelandCHA0408 2012 ChaosiumCall of Cthulhu (Classic)
Rules Iron95-123Softback The Keeper's Companion Vol 2CHA2395 2002 ChaosiumCall of Cthulhu (Classic)
Scenario The Iron Crib2001Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Card The Iron CrossSupport (F)Cards Terror in VeniceCT61 2013 Fantasy Flight GamesCall of Cthulhu LCG
Scenario The Iron Ghost17-29Softback Fearful PassagesCHA2335 1992 ChaosiumCall of Cthulhu (Classic)
Scenario The Iron-Banded Box124-144Softback Strange Aeons IICHA23117 2009 ChaosiumCall of Cthulhu (Strange Aeons: Sengoku period Japan)
Card IronmindSpell (R)Cards DreamlandsCAO1307-1 1997 ChaosiumMythos
Scenario Irrational ExpressPDF Irrational Express 2003 Self PublishedCall of Cthulhu (Now)
Card Irrational MeansSupport (U)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Rules Irregular Warfare59-80Softback World War Cthulhu: The SOE HandbookCB71942 2015 Cubicle 7Call of Cthulhu (WWII)
Card Irresistable AllureEvent (P)Cards Arkham Edition Promo 2004 Fantasy Flight GamesCall of Cthulhu CCG
Card IRS AuditorEvent (U)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Scenario Is Nothing SacredMagazine GM18Feb 1990 Croftward LimitedCall of Cthulhu (Classic)
Rules Is This Heaven?66, 68Magazine Shadis19.5Jun 1995 Alderac Entertainment GroupCall of Cthulhu (Classic)
Card Isaac MilesCharacter (F)Cards Denizens of the UnderworldCT62 2014 Fantasy Flight GamesCall of Cthulhu LCG
Card The IslandAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario The IslandPDF The IslandSKP01110 2011 Skirmisher PublishingCall of Cthulhu (Classic)
Scenario The IslandSoftback Tales of Terror (I) 1990 Pagan PublishingCall of Cthulhu (Classic)
Scenario The Island20-21PDF Tales of Terror (III)n/aSelf PublishedCall of Cthulhu (Classic)
Scenario The Island1990Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Scenario Island 256PDF Island 256May 2019 ChaosiumCall of Cthulhu (WWII)
Track Island Approach00:32Recording Eternal Lies SuitePELGT17 2010 Pelgrane PressTrail of Cthulhu
Card Island HermitCharacter (F)Cards Ancient HorrorsCT17 2008 Fantasy Flight GamesCall of Cthulhu LCG
Card An Island Near the EquatorAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario The Island of Splendour246-277Softback Shadows of AtlantisMUH01022CS 2015 Modiphius EntertainmentCall of Cthulhu (Achtung!) , Savage Worlds (Achtung!)
Scenario Island of the Damned5-26Softback Caligo Accendendum TournamentCHA0309 2004 ChaosiumCall of Cthulhu (Dark Ages)
Scenario The Island of the DeadeZine Chaosium Digestv05n11Feb 1994 ChaosiumCall of Cthulhu (Classic)
Background The Island Paradises11-43Softback The Bermuda TriangleCHA2372 1998 ChaosiumCall of Cthulhu (Now)
Background The Islands107-135Softback Shadows Over ScotlandCB7353 2011 Cubicle 7Call of Cthulhu (Classic)
Card The Isle of DreadAdventure (F)PDF Eric Johnson Mythos Collectionn/aSelf PublishedMythos
Scenario Isle of Lost Souls185-245Softback Shadows of WarCHA0349 2008 ChaosiumCall of Cthulhu (WWII)
Scenario Isle of MadnessPDF Isle of MadnessDec 2017 ChaosiumCall of Cthulhu (Classic)
Scenario Isle of the DamnedPDF The Grindhouse Volume 1Sep 2021 ChaosiumCall of Cthulhu (Strange Aeons: 1974)
Background The Isles of Shoals and Other Innsmouth Inspiration26-30Magazine The Arkham Gazette2Nov 2013 Sentinel Hill PressCall of Cthulhu (Classic)
Scenario Isolated TownJul 2009Website talesofterror.netn/aSelf PublishedCall of Cthulhu (Classic)
Card It Came From BeyondAdventure (F)PDF Eric Johnson Mythos Collectionn/aSelf PublishedMythos
Card It Came From BeyondAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card It Came from RKO PicturesAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario It Does a Body Good2018Website The Fairfield Projectn/aSelf PublishedCall of Cthulhu (Delta Green)
Card It Never Happened!Adventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario It Opens DoorsNov 2019Website Reckoning of the Deadn/aSelf PublishedCall of Cthulhu (Now)
Card IthaquaMonster (C)Cards LimitedCAO1300-1 1996 ChaosiumMythos
Card Ithaqua, The Killing ColdCharacter (R)Cards Forgotten Cities 2005 Fantasy Flight GamesCall of Cthulhu CCG
Scenario Itinerant HotelPDF Itinerant HotelMay 2021 ChaosiumCall of Cthulhu (Classic)
Card Itinerant ScholarCharacter (F)Cards Call of Cthulhu The Card GameCT18 2008 Fantasy Flight GamesCall of Cthulhu LCG
Card Itinerant ScholarCharacter (U)Cards Masks of Nyarlathotep 2005 Fantasy Flight GamesCall of Cthulhu CCG
Rules It's Bedlam in Here!36-38Magazine The Unspeakable Oath5May 1992 Pagan PublishingCall of Cthulhu (Gaslight)
Card Its Full Of Stars!Event (R)Cards New AeonCAO1311-1 1997 ChaosiumMythos
Rules IT's in the Cards30Magazine The Whisperer1Sum 1999 Severn Valley PressMythos
Rules IT's in the Cards32Magazine The Whisperer4Spr 2001 Severn Valley PressMythos
Card It's Just My ImaginationAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario It's Plantlife Jim, but not as we know it, Part 1eZine Chaosium Digestv38n02Nov 2003 ChaosiumCall of Cthulhu (Classic)
Scenario It's Plantlife Jim, but not as we know it, Part 2eZine Chaosium Digestv38n03Nov 2003 ChaosiumCall of Cthulhu (Classic)
Card It's Real, I Know It IsAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Card It's the End of the World as We Know ItAdventure (F)Website House of Tindalosn/aSelf PublishedMythos
Scenario It's the End of the World As We Know It68-71Softback Miskatonic UniversityCHA2352 1995 ChaosiumCall of Cthulhu (Classic)