Articles

Title	Pages	Publication	Code	Date	Publisher	System (Setting)
I Am It And It Is I	Event (U)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
I Am Not Dead Yet!	2001	talesofterror.net			Self Published	Call of Cthulhu (Classic)
I Am Providence		I Am Providence		2014	Self Published	I Am Providence
I Am the Fourth Wall		I Am the Fourth Wall		2019	Slinky Gibbon Games	I Am the Fourth Wall
I am the Last	164-176	N		Nov 2022	Stygian Fox	None
I am Under the Command of Others		House of Tindalos			Self Published	Mythos
I Can't Stand It	34-50	Rewind		Nov 2025	Chaosium	Call of Cthulhu (Now)	United States; 1984
I Did What the Virgin Asked	153-	Arkham Now	CHA23116	2009	Chaosium	Call of Cthulhu (Now)	Arkham
I Got the Part!	Event (F)	Rosemary's Baby			Self Published	Mythos
I Hate My Job *	2013	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Seattle; 2013; November
I Look Like What?		Chaosium Digest	v23n06	Mar 1998	Chaosium	Mythos
I Pray God Will Curse the Writer	1-18	I Pray God Will Curse the Writer		2016	Teapot Dome Games	I Pray God Will Curse the Writer
I See a Bird. No Wait ? a Byakhee	2001	talesofterror.net			Self Published	Call of Cthulhu (Classic)
I Wanna Go Home Dad	2023	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
I Want a New Drug	57	Interface	6	1992	Prometheus Publishing	Call of Cthulhu (Cyberpunk)	2020; Shoggoth; Deep One
I Want to Break Free	2020	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Alaska
I Want to Play		I Want to Play	FXC-07	2019	Stygian Fox	Call of Cthulhu (Now)	England
I Want You to Kill the Ice Cream Man	233-240	40 Adventures for Call of Cthulhu		2002	Self Published	Call of Cthulhu (Now)	Summer; 1990s
I Want You to Kill the Ice Cream Man	1-8	I Want You to Kill the Ice Cream Man		2000	Self Published	Call of Cthulhu (Now)	Summer; 1990s
I Want You to Kill the Ice Cream Man	7-15	Opifex Bimonthly	17	Jan 1999	Self Published	Call of Cthulhu (Now)	Summer; 1990s
I Want You to Kill the Ice Cream Man		Chaosium Digest	v26n04	Jul 1998	Chaosium	Call of Cthulhu (Now)	Summer; 1990s
I Was a PC Detective, or Can You Find Cthulhu in Three Easy Lessons (If That's Your Idea of a Good T	1, 22-23	Game's Afoot	9	1992	Zirlinson Publications	Call of Cthulhu (Classic)
I was a Teenage Cthulhu Chaser!	72-95	The Unspeakable Oath	8/9	Jun 1993	Pagan Publishing	Call of Cthulhu (Atomic)
I'm Surrounded by Witches	Adventure (F)	House of Tindalos			Self Published	Mythos
I'm Surrounded By Witches	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
I, Nyarlathotep		I, Nyarlathotep		Apr 2025	Chaosium	Call of Cthulhu (Classic)	Arkham; 1920s
Ia! Ia!	Event (F)	The Thousand Young	CT65	2015	Fantasy Flight Games	Call of Cthulhu LCG
Ia! Ia! Shudde M'ell!	Event (F)	Aspirations of Ascension	CT43	2011	Fantasy Flight Games	Call of Cthulhu LCG
Iaa! Cthulhu! Fhtagn!		Iaa! Cthulhu! Fhtagn!		2016	Sphinx Speileverlag	Iaa! Cthulhu! Fhtagn!
Ian Hardaway	Character (F)	The Sleeper Below	CT63	2014	Fantasy Flight Games	Call of Cthulhu LCG
Iatrophobia	Event (R)	Limited	CAO1300-1	1996	Chaosium	Mythos
Ibbix the Harbormaster	Ally (R)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
Ibrahim Amin	Ally (C)	Legends of the Necronomicon	CAO1303-1	1996	Chaosium	Mythos
The Icarus Project	88-119	Worlds of Cthulhu	2	Feb 2005	Pegasus Press	Call of Cthulhu (Strange Aeons) [Far Future]	Deep Space
Ice Caves of Mt Fuji		Ice Caves of Mt Fuji		Apr 2025	New Comet Games	Call of Cthulhu (Now)	Japan
Ice Cream Man		Ice Cream Man		May 2019	Chaosium	Call of Cthulhu (Now)	1990s; Summer
The Ice Maiden		The Edinburgh Diversions		Nov 2022	Chaosium	Call of Cthulhu (Classic)
The Ice of Paulet 7	Aug 2018	Reckoning of the Dead			Self Published	Call of Cthulhu (Strange Aeons) [Far Future]	Alien Planet
Ice Shaft	Support (F)	Never Night	CT50	2011	Fantasy Flight Games	Call of Cthulhu LCG
Ice Storm	Event (F)	For the Greater Good	CT64	2015	Fantasy Flight Games	Call of Cthulhu LCG
Icebound Horror		Icebound Horror		Aug 2025	Chaosium	Call of Cthulhu (Gaslight)	Arctic; 1899
Iceland	126-151	The Two-Headed Serpent	CHA23125	2017	Chaosium	Call of Cthulhu (Classic)	Iceland; 1930s; Voormis; Serpentman
The Icething Cometh	24-36	Signs and Portents	55	Apr 2008	Mongoose Publishing	CthulhuTech	Midwest
Icky Ichor of the Beast	Oct 2021	shoggoth.net			Self Published	Call of Cthulhu (Classic)
ICM Pay Scales	63	The Interstellar Colonial Marine Corps		2008	Self Published	Call of Cthulhu (Rising)
Icon of the Nameless Pharaoh, Lost from History	Support (R)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
The Iconodule	Oct 2020	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Icons of the Mythos		Icons of the Mythos		2024	Ad Infinitum Adventures	ICONS
The Icosahedron - A History	76-77	Lurking Fears	0001	Jan 1990	Triad Entertainments	Call of Cthulhu (Classic)
The IDEAL Conceal	23	The Dark Times	1	Aut 2017	Self Published	Call of Cthulhu (Now), Dark Conspiracy
Ideal Education	2021	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Minnesota
An Ideal Society		An Ideal Society		2006	Self Published	Call of Cthulhu (Now)
Ideas for Cybercthulhu		Chaosium Digest	v02n11	Jun 1993	Chaosium	Call of Cthulhu (Cyberpunk)
Ideathesia *	2023	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Florida
Identity Crisis	106-157	Alien Intelligence		1998	Armitage House	Call of Cthulhu (Delta Green)
Identity Crisis	2021	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
Idiosynxratic Magic Expanded	28-32	Rough Magicks	PELGT09	2009	Pelgrane Press	Trail of Cthulhu
The Idol	190-204	Tales out of Innsmouth	CHA6024	2006	Chaosium	Call of Cthulhu (Classic)
Idol from R'lyeh	Support (C)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
Idol of Bokrug	Artifact (C)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
Idol of the Abomination	Support (F)	The Path to Y'ha-nthlei	CT24	2009	Fantasy Flight Games	Call of Cthulhu LCG
The Idol of Thoth		The Idol of Thoth		Dec 2017	Stygian Fox	Call of Cthulhu (Classic)	Boston; 1925; February
The Idol of Todzth-Aeod	42-52	Athenaeum Illuminatus		Oct 2023	Chaosium	Call of Cthulhu (Classic)
Idols	57-58	Cthulhu Ireland		Dec 2024	Chaosium	Call of Cthulhu (Classic)
If I Ran the Zoog	Adventure (U)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
If I Ran the Zoog		A Web Page from a Friend			Self Published	Mythos
If I Ran the Zoog Deck		Robo's Mythos CCG Web Page			Self Published	Mythos
If I Ran the Zoog, Armed and Clueless Version		A Web Page from a Friend			Self Published	Mythos
If Only In My Dreams	2017	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Illinois
Igor Ichor Promo Card		Igor Ichor Promo Card		Mar 2009	Steve Jackson Games	Munchkin
Ikiaq *		Arkham Nights 2018 Cards		2018	Fantasy Flight Games	Arkham Horror: The Card Game
Il Mondo Occulto	Location (R)	Expeditions of Miskatonic University	CAO1301-1	1996	Chaosium	Mythos
Ilarnek	Location (C)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
Ilek-Vad	196-227	The Sense of the Sleight of Hand Man	APU8001	2013	Arc Dream Publishing	Call of Cthulhu (Dreamlands)	Dreamlands
Ill Flown By Moonlight	4-22	Ill Flown By Moonlight	MUH0010349	May 2025	Modiphius Entertainment	Achtung! Cthulhu	France; Summer; 1944
Ill Omen	Event (R)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
Ill Omens Art Pack		Ill Omens Art Pack		Dec 2017	Chaosium	Call of Cthulhu (Classic)
An Ill Wind	7-13	An Ill Wind		Mar 2025	Chaosium	Call of Cthulhu (Classic)	Providence; 1931; March; Arwassa
An Ill Wind on the Thames		An Ill Wind on the Thames		Jun 2025	Chaosium	Call of Cthulhu (Gaslight)	London
The Ill-Made Knight *		The Once and Future King		1999	Self Published	Call of Cthulhu (Classic)
Illuminated	Dec 2022	shoggoth.net			Self Published	Call of Cthulhu (Classic)
The Illuminated Ones of the Black Bile	39-64	Bayt al Azif	6	Feb 2026	Bayt al Azif Inc	Call of Cthulhu (Strange Aeons) [1808]	Spain; 1808
The Illuminated Order	41-46	Abyss Quarterly	51	1993	Ragnarok Games	Call of Cthulhu (Classic)	London; 1890
Illuminating Manuscripts: The G?harne Fragments	19-22	Polaris	1	Sum 1987	Self Published	Call of Cthulhu (Classic)
The Illumination of Aldebaran		The Illumination of Aldebaran		2023	Gallant Knight Games	Tiny Cthulhu	Kingsport
The Ilsley Variant	37-48	Dead Leaves Fall	CHA0406	2011	Chaosium	Call of Cthulhu (Classic)	Arkham; Halloween; 1920s
Ilycladian Worm	Oct 2021	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Images of Doom		Tales of Terror (II)	PAG2102	1996	Pagan Publishing	Call of Cthulhu (Classic)
Immortal Remains		The Strange Dark One	MRP0019	2012	Miskatonic River Press	None
Immune	152-166	Eldritch Chrome	CHA6052	2013	Chaosium	Call of Cthulhu (Cyberpunk)
The Immunized	Oct 2023	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Immurement	Event (F)	Denizens of the Underworld	CT62	2014	Fantasy Flight Games	Call of Cthulhu LCG
Imperfects	Oct 2005	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Imperial Japan		Big A** Book of Hooks		Jun 2025	Chaosium	Call of Cthulhu (Strange Aeons) [1868-1945]
Implant Fear	Event (U)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
Implant Fear	Event (F)	Secrets of Arkham	CT32	2010	Fantasy Flight Games	Call of Cthulhu LCG
Important Members	27-34	The Golden Dawn	PAG1004	1996	Pagan Publishing	Call of Cthulhu (Gaslight)
The Impossible Barber		The Blasphemous Tome	5.5	Aug 2020	Self Published	Call of Cthulhu (Classic)
The Impossible Chamber	1-25	The Impossible Chamber		Jul 2024	Chaosium	Call of Cthulhu (Regency)
Impossible Lamb Shanks	2023	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
An Impossible Murder		More Tales of Terror	PAG2105	2000	Pagan Publishing	Call of Cthulhu (Classic)
Imprisoned With the Pharaohs	Adventure (F)	House of Tindalos			Self Published	Mythos
Imprisoned With The Pharaohs	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
Imprisoned with the Pharaohs	Adventure (F)	Chaosium Digest	v22n12	Jan 1998	Chaosium	Mythos
Impulsive	54	Dark Passions	WDF23200	2008	WildFire Games	CthulhuTech
In a City of Bells and Towers	C:121-129	Horror on the Orient Express	CHA2331-X	1991	Chaosium	Call of Cthulhu (Classic)	Croatia; 1923
In a City of Bells and Towers	C:117-130	Horror on the Orient Express	CHA23130	2014	Chaosium	Call of Cthulhu (Classic)	Croatia; 1923
In a City of Bells and Towers		Dagon	22,23	Sep 1988	Self Published	Call of Cthulhu (Classic)	Croatia; 1923
In a City of Bells and Towers	B:97-108	Horror on the Orient Express	CHA23130-SET	2020	Chaosium	Call of Cthulhu (Classic)	Croatia; 1923
In a Different Light *	1-34	In a Different Light	cr3001	2011	Cthulhu Reborn	Call of Cthulhu (Classic)	Arkham; Spring; 1928
In A Different Light, Part 1		Chaosium Digest	v29n12	Jan 2000	Chaosium	Call of Cthulhu (Classic)	Arkham; Spring; 1928
In A Different Light, Part 2		Chaosium Digest	v30n01	Jan 2000	Chaosium	Call of Cthulhu (Classic)	Arkham; Spring; 1928
In A Different Light, Part 3		Chaosium Digest	v30n02	Jan 2000	Chaosium	Call of Cthulhu (Classic)	Arkham; 1928; Spring
In A Different Light, Part 4		Chaosium Digest	v30n03	Jan 2000	Chaosium	Call of Cthulhu (Classic)	Arkham; Spring; 1928
In A Different Light, Part 5		Chaosium Digest	v30n04	Jan 2000	Chaosium	Call of Cthulhu (Classic)	Arkham; Spring; 1928
In a Timely Manor		In a Timely Manor		Jan 2026	Chaosium	Call of Cthulhu (Classic)	England; 1920s
In an Unmarked Grave	Event (F)	Sleep of the Dead	CT30	2009	Fantasy Flight Games	Call of Cthulhu LCG
In and Out of the Academic World	64-67	Miskatonic University	CHA2352	1995	Chaosium	Call of Cthulhu (Classic)
In Captivity	34-38	Guide to the Pacific Front	MPS01051CS	2014	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)
In Dark and Lonely Waters	5-35	In Dark and Lonely Waters		Jul 2024	Chaosium	Call of Cthulhu (Now)	England; October; 1986
In Darkness We Wait		In Darkness We Wait		Apr 2024	Chaosium	Call of Cthulhu (Now)	California; Mi-Go
In Darkness, Power	Adventure (F)	House of Tindalos			Self Published	Mythos
In Fabulous Color!		In Fabulous Color!		Dec 2024	Chaosium	Call of Cthulhu (Classic)	Los Angeles; 1930s
In From the Cold		In From the Cold		2017	Golden Goblin Press	Call of Cthulhu (Classic)
In Media Res	146-161	Out of the Vault	PAG1009	2002	Pagan Publishing	Call of Cthulhu (Classic)	Missouri; 1993; Summer
In Media Res	56-63	The Unspeakable Oath	10	Jan 1994	Pagan Publishing	Call of Cthulhu (Now)	Missouri; 1993; Summer
In Media Res Live Action Roleplaying Report	25	The Unspeakable Oath	11	Jan 1995	Pagan Publishing	Call of Cthulhu (Now)
In Memoriam		In Memoriam		Aug 2025	Chaosium	Call of Cthulhu (Classic)	Kingsport
In Nomine Diabolis		More Tales of Terror	PAG2105	2000	Pagan Publishing	Call of Cthulhu (Classic)
In Old Commoriom		Deepest, Darkest Eden	MRP0025	2013	Miskatonic River Press	None
In Rags	Support (C)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
In Requiem	63-64	Slaves of the Mother	PELGT31	2014	Pelgrane Press	Trail of Cthulhu	Minnesota; 1939
In Requiem	174-175	Cthulhu Apocalypse	PELGT40	2015	Pelgrane Press	Trail of Cthulhu	Minnesota; 1939
In Rerum Supernatura	108-113	Call of Cthulhu	CHA2386	1999	Chaosium	Call of Cthulhu (Classic)
In Rerum Supernatura	189-192	Call of Cthulhu	CHA2336	1992	Chaosium	Call of Cthulhu (Classic)
In Search of Sanity	4-55	In Search of Sanity	PZO90109	2016	Paizo Publishing	Pathfinder
In Service to a Distant Throne	5-26	Y		Nov 2022	Stygian Fox	None
In Shadows	2023	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Arizona
In Strange Seas	4-23	In Strange Seas		May 2023	Chaosium	Call of Cthulhu (Regency)
In Strange Seas	1-23	In Strange Seas: The Regency Cthulhu Naval Compendium		Oct 2023	Chaosium	Call of Cthulhu (Regency)
In the Back Seat		The Way It Went Down		2018	Arc Dream Publishing	Delta Green
In The Beginning	16-25	Beyond the Mountains of Madness	CHA2380	1999	Chaosium	Call of Cthulhu (Classic)
In The Cards	Oct 2009	talesofterror.net			Self Published	Call of Cthulhu (Classic)
In the Clutches of Chaos		In the Clutches of Chaos	AHC34	2019	Fantasy Flight Games	Arkham Horror: The Card Game
In the Clutches of Mami Wata	59-72	Secrets of the Congo	CHA0387	2010	Chaosium	Call of Cthulhu (Classic)	Democratic Republic of the Congo; 1920s
In the Court of the Dragon	Conspiracy (F)	Touched by the Abyss	CT58	2012	Fantasy Flight Games	Call of Cthulhu LCG
In the Depths of Silverstring	2-4	In the Depths of Silverstring		2020	Mundus Infinitos	In the Depths of Silverstring
In the End There is a Drain		Tails of Terror	GGP		Golden Goblin Press	None
In the Flesh	163-178	Dark Tales from the Secret War	MUH50200	2015	Modiphius Entertainment	None
In the Forests, the Shadows		Chaosium Digest	v24n03	Mar 1998	Chaosium	Call of Cthulhu (Classic)
In the Forests, The Shadows		More Tales of Terror	PAG2105	2000	Pagan Publishing	Call of Cthulhu (Classic)
In the Grip of Madness	27-34	Worlds of Cthulhu	2	Feb 2005	Pegasus Press	Call of Cthulhu (Classic)
In the Gutter	Event (U)	Forgotten Cities		2005	Fantasy Flight Games	Call of Cthulhu CCG
In the House of Glass	53-72	Bayt al Azif	3	Nov 2020	Bayt al Azif Inc	Call of Cthulhu (Now)
In the Matter of Mr Barnabas Marsh		House of Tindalos			Self Published	Mythos
In The Mountain	01:00	Eternal Lies Suite	PELGT17	2010	Pelgrane Press	Trail of Cthulhu
In The Nick of Time	Event (U)	Limited	CAO1300-1	1996	Chaosium	Mythos
In The Orient Express I		Cthulhu Maps - In The Orient Express I	093	2023	Lovemaps	Call of Cthulhu (Classic)
In The Orient Express II		Cthulhu Maps - In The Orient Express II	094	2023	Lovemaps	Call of Cthulhu (Classic)
In the Same Boat		The Sassoon Files	SOS-HORROR4	Jun 2025	Sons of the Singularity	Call of Cthulhu (Classic)	Singapore; 1920s
In the Service of One's Country	34-47	Investigator's Guide to the Secret War	MPS01031CS	2013	Modiphius Entertainment	Call of Cthulhu (Achtung!), Savage Worlds (Achtung!)
In the Service of One's Country	34-47	Fate Investigator's Guide to the Secret War	MPS01031F	2014	Modiphius Entertainment	Fate
In the Shadow of His Eye	2022	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Alaska
In the Shadow of the Horns		In the Shadow of the Horns		Dec 2021	Chaosium	Call of Cthulhu (Classic)	London; 1925
In the Shadow of the Valley *	2019	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Texas
In the Shadows of Death	24-39	In the Shadows	CHA2357	1995	Chaosium	Call of Cthulhu (Classic)	Louisiana; 1927
In the Shadows of the 603rd	71-86	Dark Tales from the Secret War	MUH50200	2015	Modiphius Entertainment	None
In the Shuffle		The Way it Went Down Volume 2	APU8013	Apr 2023	Arc Dream Publishing	Delta Green
In the Steps of the Elder	26-33	Forest of Fear	MUH052305	2022	Modiphius Entertainment	Achtung! Cthulhu
In the Vale of Pnath	199-204	The Book of Eibon	CHA6026	2006	Chaosium	Call of Cthulhu (Classic)
In the Vault	Adventure (F)	House of Tindalos			Self Published	Mythos
In The Vault	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
In the Violet Hour		In the Violet Hour			Golden Goblin Press	Call of Cthulhu (Invictus)	London
In the Wake of Gods	2018	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
In the Wake of the Sleeper	Event (F)	The Order of the Silver Twilight	CT33	2010	Fantasy Flight Games	Call of Cthulhu LCG
In the Watches of the Night	2005	talesofterror.net			Self Published	Call of Cthulhu (Classic)
In the Waters of Wyman	8-23	White Wolf	4	Oct 1986	White Wolf Games	Call of Cthulhu (Classic)	New England; 1920s
In the Woods, No One Can Hear You Screaming	54-55	Dark Passions	WDF23200	2008	WildFire Games	CthulhuTech
In Too Deep		In Too Deep	AHC53	2020	Fantasy Flight Games	Arkham Horror: The Card Game
In Waters Black The Lost Ones Sleep	23-48	Frontier Cthulhu	CHA6041	2007	Chaosium	Call of Cthulhu (Darker Trails)
In Whom We Trust *	2016	Four Letters At Random			Self Published	Call of Cthulhu (Classic)	Brazil
In Whom We Trust		Four Letters At Random			Self Published	Cthulhu Dark	Brazil
In Xanthic Terms		In Xanthic Terms		Oct 2023	Chaosium	Call of Cthulhu (Now)	London
Inca Unconquered	1998	Ubar			Self Published	Call of Cthulhu (Classic)	Peru; 1920s
Incident at Dagon Wells	149-164	Frontier Cthulhu	CHA6041	2007	Chaosium	Call of Cthulhu (Darker Trails)
An Incident at the Border	86-103	Mythos Expeditions	PELGT37	2014	Pelgrane Press	Trail of Cthulhu	Paraguay; August; 1930s; Dark Young of Shub-Niggurath
Incident in Iraq	171-180	Walker in the Wastes	PAG1002	1994	Pagan Publishing	Call of Cthulhu (Classic)	Iraq; 1931
Inclusivity	11-12	Keeper Tips	CHA5120	2021	Chaosium	Call of Cthulhu (Classic)
Incommers	2-18	Incommers		2016	Xipe Totec Press	Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now)
Incommers	110-125	Mythos in Medias Res		2016	Xipe Totec Press	Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now)
Incomprehensible Machine	Support (R)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
Inconspicuous Zoog	Character (F)	Sleep of the Dead	CT30	2009	Fantasy Flight Games	Call of Cthulhu LCG
An Inconvenience to Travellers	1997	talesofterror.net			Self Published	Call of Cthulhu (Classic)	London
The Incredible Dr Quinn		The Incredible Dr Quinn		Jan 2022	Chaosium	Call of Cthulhu (Now)
Incredible Incunabula: Fifty Works of Arcane and Forgotten Lore for Call of Cthulhu	44-47	Space Gamer	86	Jul 1989	Steve Jackson Games	Call of Cthulhu (Classic)
Incriminating Evidence	Event (F)	Scooby Doo Set 3			Self Published	Mythos
The Incriminating Letter	1-10	The Incriminating Letter		2003	Self Published	Call of Cthulhu (Now)
The Incriminating Letter		RPG Archive			Self Published	Call of Cthulhu (Now)
The Incubus of Atlantis	380-386	The Book of Eibon	CHA6026	2006	Chaosium	Call of Cthulhu (Classic)
Indebted	Support (F)	Denizens of the Underworld	CT62	2014	Fantasy Flight Games	Call of Cthulhu LCG
Independence Square	Support (C)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Independent Operator	Character (U)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Indescribable Underworlds		Indescribable Underworlds		2025	Everything Epic Games	Secrets of the Lost Tomb
India	99-120	Shadows of Atlantis	MUH051747	2022	Modiphius Entertainment	Achtung! Cthulhu	India; 1939
India		Tournament of Shadows - India		Dec 2025	Chaosium	Call of Cthulhu (Gaslight)	India; 1893
Indian Picture Rock	Location (F)	Scooby Doo Set 2		Mar 1999	Self Published	Mythos
Indiana Jones for CoC		Chaosium Digest	v23n02	Feb 1998	Chaosium	Call of Cthulhu (Classic)
Indianapolis, IN	7	Hometown Horrors Volume Two		Oct 2022	Chaosium	Call of Cthulhu (Now)
Indifference	224-245	Eldritch Chrome	CHA6052	2013	Chaosium	Call of Cthulhu (Cyberpunk)
INDIGO: Advancement Points	3-8	INDIGO: Advancement Points		May 2024	Chaosium	Call of Cthulhu (Now)
Indigo: After the End of the World		Indigo: After the End of the World		Feb 2018	Chaosium	Call of Cthulhu (Now)
Induce Terror	Event (F)	The Mark of Madness	CT66	2015	Fantasy Flight Games	Call of Cthulhu LCG
Inducement	Support (U)	Forgotten Cities		2005	Fantasy Flight Games	Call of Cthulhu CCG
Induction	16-36	The Laundry Operative's Handbook	CB70801	Jun 2025	Cubicle 7	The Laundry
Industrial Espionage	94-95	Unveiled Threats	WDF23600	2011	WildFire Games	CthulhuTech
An Industrial Harbor		Cthulhu Maps - An Industrial Harbor	017	2021	Lovemaps	Call of Cthulhu (Classic)
The Inevitable	2016	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
The Infaernum of Cthulhu		The Infaernum of Cthulhu		2024	Mind's Vision	Infaernum
Infected by Madness	Event (C)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
Infected by Madness	Event (F)	Secrets of Arkham	CT32	2010	Fantasy Flight Games	Call of Cthulhu LCG
Infectious Disease	99-100	Five Points	MYL30301	2016	Mystic Throne Entertainment	Dark Streets	New York; 1840s
Infernal Obsession	Support (F)	The Antediluvian Dreams	CT21	2009	Fantasy Flight Games	Call of Cthulhu LCG
The Infernal Star	172-?	The KarkAsh-Ton Cycle	CHA6046	2008	Chaosium	Call of Cthulhu (Classic)
Inferno	1-32	Whispers in the Dark	0003	Oct 1993	Triad Entertainments	Call of Cthulhu (Now)
Infest	1-4	Game Trade Magazine	26	Apr 2002	Alliance Game Distributors	Call of Cthulhu (Now)
Infestation	1997	Ubar			Self Published	Call of Cthulhu (Classic)	Los Angeles
Infestation		Infestation		Mar 2022	Chaosium	Call of Cthulhu (Classic)	Arkham
Infested Cemetery	Support (U)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Infested Pumpkin	Oct 2021	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Infinite Gulfs of Darkness		Infinite Gulfs of Darkness		2021	Ludonova	Arkham Noir
The Infinite Hotel	76-77	Herald: Lovecraft and Tesla	RDG020	2017	Ravendesk Games	Savage Worlds
Infirmary	Support (F)	Words of Power	CT54	2012	Fantasy Flight Games	Call of Cthulhu LCG
Influenza	Event (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
Informant	Character (C)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
An Inhabitant of Carcosa	7-10	The Hastur Cycle	CHA6020	1993	Chaosium	Call of Cthulhu (Classic)
An Inhabitant of Carcosa	8-13	The Hastur Cycle	CHA6001	1993	Chaosium	Call of Cthulhu (Classic)
Inhabitants of the Realms	216-262	Secrets of Japan	CHA2392	2005	Chaosium	Call of Cthulhu (Now)
The Inheritance	33-43	Horror Stories From the Red Room	CHA0413	2013	Chaosium	Call of Cthulhu (Classic)	Connecticut; June; 1922
Inheritance		Inheritance		2019	Chaosium	Call of Cthulhu (Classic)	Innsmouth; 1925
Inheritance	1-29	Inheritance	FS03	2007	Self Published	Call of Cthulhu (Classic)	New York State; 2271; October
Inheritance	35-	Letters From the Leagues Volume 2	TAG20306	2020	Triple Ace Games	Leagues of Adventure
Inheriting Darkness	9-10	Quill: Shadow and Ink		2017	Trollish Delver Games	Quill	Paris; 1903
Inheriting Darkness	14-15	Quill: Shadow and Ink		2021	Trollish Delver Games	Quill	Paris; 1903
The Inheritor	5-28	The Thing at the Threshold	CHA2339	1992	Chaosium	Call of Cthulhu (Classic)	Massachusetts; 1927
Inhuman Trafficking	2-31	Inhuman Trafficking		Sep 2023	Xipe Totec Press	Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now), Cthulhu Obscura
Initial Briefing	11-16	The Fall of Delta Green		2018	Pelgrane Press	The Fall of Delta Green
Initialization	2018	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
Initiate of Dagon	Character (F)	The Sleeper Below	CT63	2014	Fantasy Flight Games	Call of Cthulhu LCG
Initiate of Huang Hun	Character (F)	Curse of the Jade Emperor	CT48	2011	Fantasy Flight Games	Call of Cthulhu LCG
Initiation	Event (F)	The Order of the Silver Twilight	CT33	2010	Fantasy Flight Games	Call of Cthulhu LCG
Initiation of Glaaki	Event (F)	Aspirations of Ascension	CT43	2011	Fantasy Flight Games	Call of Cthulhu LCG
Injury Cards		Injury Cards	PELGY01IC	2019	Pelgrane Press	The Yellow King
Ink and Blood	Feb 2017	shoggoth.net			Self Published	Call of Cthulhu (Classic)	Arkham; March; 1934
Ink Man	Oct 2019	shoggoth.net			Self Published	Call of Cthulhu (Classic)
The Inked		Creatures for Modern Horror - Book 1		Sep 2023	RPG Gamer	Call of Cthulhu (Now)
Inland Waterways	37	Green and Pleasant Land	CHA2320	1987	Chaosium	Call of Cthulhu (Classic)
Inlibration	130-139	Eldritch Chrome	CHA6052	2013	Chaosium	Call of Cthulhu (Cyberpunk)
Inmasking the Villian	Event (F)	Scooby Doo Set 1			Self Published	Mythos
An Inner Call		An Inner Call		Sep 2020	Chaosium	Call of Cthulhu (Classic)	1920s
An Inner Call	113-130	From Beyond		Nov 2023	Chaosium	Call of Cthulhu (Classic)	1920s
The Inner Circle	Adventure (C)	Serena's Dojo		1999	Self Published	Mythos
The Inner Light		The Inner Light		Jan 2024	Chaosium	Call of Cthulhu (Classic)	1920s; Cthugha
The Inner Order Curiculum	43-49	The Golden Dawn	PAG1004	1996	Pagan Publishing	Call of Cthulhu (Gaslight)
Inner Sanctum	Support (U)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
The Innocent	55-84	Caligo Accedendum Tournament	CHA0309	2004	Chaosium	Call of Cthulhu (Dark Ages)	France; Deep One
The Innocents	Oct 2005	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Innsmouth 2000	101-105	Ye Booke of Tentacles	3	2000	The Chaos Society	Call of Cthulhu (Now)
Innsmouth 32		Innsmouth 32		2020	GameWick Games	Innsmouth 32
The Innsmouth Connection	31-43	Before the Fall	CHA2377	1998	Chaosium	Call of Cthulhu (Classic)	Innsmouth; 1920s; Shoggoth
The Innsmouth Conspiracy		The Innsmouth Conspiracy	AHC52	2020	Fantasy Flight Games	Arkham Horror: The Card Game
Innsmouth Courier	Location (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
The Innsmouth Cover-up	Adventure (F)	House of Tindalos			Self Published	Mythos
The Innsmouth Cover-Up	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
Innsmouth Curios	46-52	The Arkham Gazette	2	Nov 2013	Sentinel Hill Press	Call of Cthulhu (Classic)
The Innsmouth Curse		The Innsmouth Curse		2024	Self Published	The Innsmouth Curse
The Innsmouth Deck		Chaosium Digest	v21n06	Sep 1997	Chaosium	Mythos
Innsmouth Deck		Thastygliax's Vault			Self Published	Mythos
The Innsmouth Deck		Robo's Mythos CCG Web Page			Self Published	Mythos
The Innsmouth Deck		A Web Page from a Friend			Self Published	Mythos
Innsmouth Escape		Innsmouth Escape	TLC3401	2008	Twilight Creations	Innsmouth Escape
Innsmouth Express	Adventure (F)	House of Tindalos			Self Published	Mythos
The Innsmouth Girl	4-25	N		Nov 2022	Stygian Fox	None
Innsmouth Girls	2022	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	New York; 1928; Spring
Innsmouth Gold	53-61	The Arkham Gazette	2	Nov 2013	Sentinel Hill Press	Call of Cthulhu (Classic)
Innsmouth Gold	142-164	The Innsmouth Cycle	CHA6017	2006	Chaosium	Call of Cthulhu (Classic)
Innsmouth Handouts		Innsmouth Handout Pack		2021	base113 Games	Call of Cthulhu (Classic)
Innsmouth Harbor		Cthulhu Maps - Innsmouth Harbor	025	2022	Lovemaps	Call of Cthulhu (Classic)
The Innsmouth Head	125-141	The Innsmouth Cycle	CHA6017	2006	Chaosium	Call of Cthulhu (Classic)
Innsmouth Horror Expansion		Innsmouth Horror Expansion	VA57	2009	Fantasy Flight Games	Arkham Horror
Innsmouth Idyll		Dead But Dreaming 2	MRP0013	2011	Miskatonic River Press	None
Innsmouth Independence Day	133-178	The Eldritch New England Holiday Collection	GGP2005	2020	Golden Goblin Press	Call of Cthulhu (Classic)	Innsmouth; July
Innsmouth Independence Day		The Lovecraft Country Holiday Collection	GGP	2020	Golden Goblin Press	Call of Cthulhu (Classic)	Innsmouth; July
The Innsmouth Lighthouse	1	The Innsmouth Lighthouse		2009	Self Published	Risus	Innsmouth
The Innsmouth Look	Event (R)	Limited	CAO1300-1	1996	Chaosium	Mythos
The Innsmouth Look	Support (C)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Innsmouth Look	Adventure (F)	Eric Johnson Mythos Collection			Self Published	Mythos
Innsmouth Maps		Innsmouth Poster Maps		2015	Lore Wise Games	Call of Cthulhu (Classic)
Innsmouth Mystery		Innsmouth Mystery		2023	Self Published	Innsmouth Mystery
The Innsmouth Papers		The Innsmouth Papers		2020	Self Published	The Innsmouth Papers
Innsmouth Shoggoth	Character (R)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
The Innsmouth Terror	1-28	The Innsmouth Terror		Mar 2026	Chaosium	Call of Cthulhu (Classic)	Innsmouth; 1923
The Innsmouth Threat	Story (F)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
The Innsmouth Threat	Story (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
The Innsmouth Threat	Story (F)	Secrets of Arkham	CT32	2010	Fantasy Flight Games	Call of Cthulhu LCG
Innsmouth Travel Guide		Innsmouth Travel Guide	CGA18002	Sep 2025	CrowD Games	Travel Guide
Innsmouth Troublemaker	Character (C)	Forbidden Relics		2004	Fantasy Flight Games	Call of Cthulhu CCG
Innsmouth Troublemaker	Character (F)	Call of Cthulhu The Card Game	CT18	2008	Fantasy Flight Games	Call of Cthulhu LCG
Innsmouth Weapons Deck		Chaosium Digest	v20n11	Aug 1997	Chaosium	Mythos
Innsmouth Weapons Deck		Robo's Mythos CCG Web Page			Self Published	Mythos
Innsmouth Weapons Deck		A Web Page from a Friend			Self Published	Mythos
Innsmouth's Burying Grounds	9-15	The Arkham Gazette	2	Nov 2013	Sentinel Hill Press	Call of Cthulhu (Classic)
Innsmouth: The Stolen Child		Innsmouth: The Stolen Child		2022	Blue Fox Publishing	Innsmouth: The Stolen Child
Inquanok	105-142	The Sense of the Sleight of Hand Man	APU8001	2013	Arc Dream Publishing	Call of Cthulhu (Dreamlands)	Dreamlands
Inquanok		Inquanok		Aug 2025	Chaosium	Call of Cthulhu (Dreamlands)
Inquisitive Chinese Intellectual/Morose Veteran Of The Great War	Investigator (F)	Limited	CAO1300-1	1996	Chaosium	Mythos
Insane in the Membrane	2021	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Idaho
Insane in the Membrane!	Adventure (F)	House of Tindalos			Self Published	Mythos
Insane In The Membrane!	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
Insane Insight	Spell (F)	Sesqua Valley			Self Published	Mythos
Insanitarium		Insanitarium		2019	Chaosium	Call of Cthulhu (Classic)	Michigan; 1925
Insanity	75-82	Swords of Cthulhu		2022	BRW Games	Adventures Dark and Deep
Insanity and Dread	70-84	Sandy Petersen's Cthulhu Mythos		2019	Petersen Games	Dungeons and Dragons
Insanity and Dreams	88-105	Sandy Petersen's Cthulhu Mythos		2016	Petersen Games	Pathfinder
Insanity and Faith in Averoigne	85-88	Worlds of Cthulhu	4	Jan 2006	Pegasus Press	Call of Cthulhu (Dark Ages)
Insanity and Other Disorders	42-50	Shadows of Cthulhu	MGP6132	2008	Reality Deviant	True 20
Insanity, Society and the Law	43-50	Taint of Madness	CHA2354	1995	Chaosium	Call of Cthulhu (Classic)
Insatiable		Insatiable		Sep 2025	Chaosium	Call of Cthulhu (Strange Aeons) [1973]	1973
Inscrutable	82-95	Madness on the Orient Express	CHA6057	2014	Chaosium	Call of Cthulhu (Classic)
Insect From Shaggai	Monster (F)	Unlimited	CAO1306-1	1997	Chaosium	Mythos
Insect From Shaggai	Monster (F)	Unlimited	CAO1306-1	1997	Chaosium	Mythos
Insect Swarm	Character (F)	The Thing from the Shore	CT23	2009	Fantasy Flight Games	Call of Cthulhu LCG
The Insects from Shaggai		Tradetalk	11	2002	The Chaos Society	Call of Cthulhu (Classic)
Insects from Shaggai		Cthulhu's Domain			Self Published	Mythos
Insert Coin for Credit	70-90	Rewind		Nov 2025	Chaosium	Call of Cthulhu (Now)	United States; 1984
Inside		The Way It Went Down		2018	Arc Dream Publishing	Delta Green
Inside Information	Event (C)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Inside Information	Event (F)	Call of Cthulhu The Card Game	CT18	2008	Fantasy Flight Games	Call of Cthulhu LCG
Inside Man	Character (F)	The Unspeakable Pages	CT57	2012	Fantasy Flight Games	Call of Cthulhu LCG
Inside Out	49	The Whisperer	5	Aut 2003	Severn Valley Press	Call of Cthulhu (Now)
Inside the Reich	15-21	Keeper's Guide to the Secret War	MPS01032CS	2013	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)
Inside-Out Hours	Event (U)	Forgotten Cities		2005	Fantasy Flight Games	Call of Cthulhu CCG
Insidious Ululation of the Invisible Supplicants	Spell (U)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
Insight	17-18	Eldritch Instinct		2025	Self Published	Eldritch Instinct
Insignificant	4-7	Vessels of the Void: Spaceships	WDF33620	2015	WildFire Games	The Void
Inspector John LeGrasse	Character (F)	The Sleeper Below	CT63	2014	Fantasy Flight Games	Call of Cthulhu LCG
Inspector John Legrasse, Cop in the Know	Character (U)	Unspeakable Tales		2004	Fantasy Flight Games	Call of Cthulhu CCG
Inspector Li Flint	Character (F)	Curse of the Jade Emperor	CT48	2011	Fantasy Flight Games	Call of Cthulhu LCG
Insta-Plots	133-134	Cthulhu Casebook	CHA3305	1990	Chaosium	Call of Cthulhu (Classic)
Instability in the Mythos	Event (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
Instability in the Mythos	Event (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
Instability in the Mythos		Chaosium Digest	v27n05	Jan 1999	Chaosium	Mythos
Instability in the Mythos (2 versions)		Cthulhu's Domain			Self Published	Mythos
The Institute for Paranormal Studies: A Cult Profile	31-40	Interface	6	1992	Prometheus Publishing	Call of Cthulhu (Cyberpunk)
Institutions, Organizations and Power Groups in Japan	166-178	Secrets of Japan	CHA2392	2005	Chaosium	Call of Cthulhu (Now)
Instruments of Glass and Metal	Support (U)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
Insubstantial Insect	Character (U)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Insured Misery	39-48	Shattered Reality	YH-C-7	Mar 2025	Chaosium	Call of Cthulhu (Now)
Insured Misery		Insured Misery	YH-C-7F	Apr 2025	Chaosium	Call of Cthulhu (Now)
Integratron	2010	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	California
Intelligence Agent	Character (F)	For the Greater Good	CT64	2015	Fantasy Flight Games	Call of Cthulhu LCG
Intelligence Notes	67-78	Shadowfall	BB-WBC-005	2019	Baggage Books	Cepheus Engine
Intelligence Report #5743	1997	delta-green.com			Pagan Publishing	Call of Cthulhu (Delta Green)
Intelligences (1928)		Tales from Failed Anatomies	ARCTFFASC		Arc Dream Publishing	Call of Cthulhu (Delta Green)
Inter Solar System Species Index		Chaosium Digest	v07n07	Sep 1994	Chaosium	Call of Cthulhu (Classic)
Inter-dimensional Transporter	Support (F)	The Twilight Beckons	CT40	2011	Fantasy Flight Games	Call of Cthulhu LCG
Interdimensional Sorcerer's Apprentice		Chaosium Digest	v21n11	Sep 1997	Chaosium	Mythos
The Interesting Shop	Adventure (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
The Interesting Shop	Adventure (F)	House of Tindalos			Self Published	Mythos
Interface 19.40	51-55	Interface 19.40	MUH050027AC	2015	Modiphius Entertainment	Call of Cthulhu (Achtung!), Interface Zero, Savage Worlds (Achtung!)
Interim Period 1930-1931	51	Coming Full Circle	PAG1003	1995	Pagan Publishing	Call of Cthulhu (Classic)
Interim Period 1933-1934	83	Coming Full Circle	PAG1003	1995	Pagan Publishing	Call of Cthulhu (Classic)
Interim Period 1936-1939	107	Coming Full Circle	PAG1003	1995	Pagan Publishing	Call of Cthulhu (Classic)
International Pack 1 - Europe		International Pack 1 - Europe		Jul 2025	Arc Dream Publishing	Delta Green
The Internet	Tome (C)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
INTERPOL Italian Headquarters	Location (C)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
Interrogation Center	Support (F)	The Spawn of the Sleeper	CT19	2009	Fantasy Flight Games	Call of Cthulhu LCG
Interrogator	Character (F)	For the Greater Good	CT64	2015	Fantasy Flight Games	Call of Cthulhu LCG
Intersections	166-226	World War Cthulhu: Cold War	CB71970	2016	Cubicle 7	Call of Cthulhu (Cold War)	Turkey
Intersections	2-21	Intersections		2016	Xipe Totec Press	Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now)
Intersections	68-92	Mythos in Medias Res		2016	Xipe Totec Press	Trail of Cthulhu, Cthulhu Dark, Delta Green, Call of Cthulhu (Now)
Interstellar Migration	Event (F)	The Key and the Gate	CT60	2013	Fantasy Flight Games	Call of Cthulhu LCG
Interstellar Visitor	Character (R)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Intervention	Event (F)	The Spoken Covenant	CT36	2010	Fantasy Flight Games	Call of Cthulhu LCG
Interviews with Larry DiTillio and Lynn Willis	11-14	The Masks of Nyarlathotep Companion (Limited)	60-MONC-08	2016	Sixtystone Press	None
Interviews with Larry DiTillio and Lynn Willis	11-14	The Masks of Nyarlathotep Companion (Unlimited)	60-MONC-03 (?)	2016	Sixtystone Press	None
Intimate Encounters	122-135	The Things We Leave Behind	TTWLB	2016	Stygian Fox	Call of Cthulhu (Now)
Intimate Encounters	73-78	The Mark of Evil			Stygian Fox	Call of Cthulhu (Now)
Intimidate	Event (C)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Intimidate	Event (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Intimidate	Event (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Intimidate	Event (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Intimidate	Event (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Intimidate	Event (F)	Secrets of Arkham	CT32	2010	Fantasy Flight Games	Call of Cthulhu LCG
Into a Dark Heart		Into a Dark Heart		Aug 2021	Chaosium	Call of Cthulhu (Classic)	Democratic Republic of the Congo
Into the Darkness		Tales of Terror (I)		1990	Pagan Publishing	Call of Cthulhu (Classic)
Into the Darkness	31-32	Tales of Terror (III)			Self Published	Call of Cthulhu (Classic)
Into the Darkness	1990	talesofterror.net			Self Published	Call of Cthulhu (Classic)
Into the Deep	Event (R)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Into the Depths	178-195	Assault on the Mountains of Madness	MUH050029	2013	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)	Antarctica; 1945
Into the East	73-82	Nocturnum: Deep Secrets	CC03	1999	Fantasy Flight Games	Call of Cthulhu (Now)	Russia
Into the East *	234-244	Nocturnum: d20	CC05	2002	Fantasy Flight Games	Call of Cthulhu (Now)	Russia
Into the Fray	159-170	Keeper's Guide to the Secret War	MPS01032CS	2013	Modiphius Entertainment	Call of Cthulhu (Achtung!), Savage Worlds (Achtung!)
Into the Gothic		Into the Gothic		Oct 2023	Chaosium	Call of Cthulhu (Classic)
Into the Maelstrom		Into the Maelstrom	AHC58	2021	Fantasy Flight Games	Arkham Horror: The Card Game
Into the Moonlight		Mark of the Beast	CHA6062	2016	Chaosium	Call of Cthulhu (Classic)
Into the Mouth of Truth	49-67	Shadows of Atlantis	MUH01022CS	2015	Modiphius Entertainment	Call of Cthulhu (Achtung!), Savage Worlds (Achtung!)	Italy; 1939
Into the Normal	D:4-5	The Yellow King	PELGY01D	2020	Pelgrane Press	The Yellow King
Into the Realm of the Wind-Walker	59-72	Walker in the Wastes	PAG1002	1994	Pagan Publishing	Call of Cthulhu (Classic)	Canada; Alaska; 1929; June
Into the Secret War	4	Achtung! Cthulhu Basic Rules	MUH0010342	2023	Modiphius Entertainment	Achtung! Cthulhu
Into the Throat of the Beast	7-27	The Arkham Evil	T-1	1983	Theatre of the Mind Enterprises	Call of Cthulhu (Classic)	Pennsylvania; March; 1919
Into the Unknown		Into the Unknown		Apr 2022	Chaosium	Call of Cthulhu (Strange Aeons) [2052]	Antarctica; August; 2052
Into The Wars	B:4-6	The Yellow King	PELGY01D	2020	Pelgrane Press	The Yellow King
Into the West		The Way It Went Down		2018	Arc Dream Publishing	Delta Green
Into the Wilds, Into the Depths		A Cold Fire Within	CHA23162	2019	Chaosium	Call of Cthulhu (Classic)	1935
Into the Woods	Conspiracy (F)	Lost Rites	CT56	2012	Fantasy Flight Games	Call of Cthulhu LCG
Into the Woods	18-25	Cthulhu Once Upon a Time		Mar 2025	Chaosium	Call of Cthulhu (Strange Aeons) [Fantasy World]	Fantasy World
An Intriguing Offer	Support (R)	Eldritch Edition		2005	Fantasy Flight Games	Call of Cthulhu CCG
Introducing Call of Cthulhu Adventures		Chaosium Digest	v24n03	Mar 1998	Chaosium	Call of Cthulhu (Classic)
Introduction	25-33	Secrets of Japan	CHA2392	2005	Chaosium	Call of Cthulhu (Now)
Introduction	6-14	The Legacy of Arrius Lurco	MRP0009	2011	Miskatonic River Press	Call of Cthulhu (Invictus)
Introduction	4-23	The Curse of Nineveh	CB7355	2015	Cubicle 7	Call of Cthulhu (Classic)
Introduction	11-20	Eldritch Skies	BPI7500	2012	Battlefield Press	Eldritch Skies
Introduction	4-13	Aeon Angelus Necronomicon: Evolution		Mar 2008	Self Published	CthulhuTech
Introduction	8-19	World War Cthulhu: The Darkest Hour	CB71939	2013	Cubicle 7	Call of Cthulhu (WWII)
Introduction	4-7	World War Cthulhu: London	CB71941	2016	Cubicle 7	Call of Cthulhu (WWII)
Introduction	4-23	World War Cthulhu: Cold War	CB71970	2016	Cubicle 7	Call of Cthulhu (Cold War)
Introduction	4-8	World War Cthulhu: Cold War - Our American Cousins	CB71973	2017	Cubicle 7	Call of Cthulhu (Cold War)
Introduction	9-30	Skirmish: Commander's Set	MUH050454	2016	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)
Introduction	1-5	Zero Point, Part 3 - Code of Honour	MUH051257	2017	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)
Introduction	5-9	Horror's Heart	CHA2359	1996	Chaosium	Call of Cthulhu (Classic)
Introduction	4-19	Terror from the Skies	CHA23128	2012	Chaosium	Call of Cthulhu (Classic)
Introduction	5-16	Reign of Terror	CHA23149	2017	Chaosium	Call of Cthulhu (Strange Aeons)
Introduction	23-35	Call of Cthulhu	CHA2386	1999	Chaosium	Call of Cthulhu (Classic)
Introduction	24-34	Call of Cthulhu	CHA23106	2005	Chaosium	Call of Cthulhu (Classic)
Introduction	12-19	Keeper Rulebook	CHA23135	2015	Chaosium	Call of Cthulhu (Classic)
Introduction		Delta Green Anomalies			Self Published	Call of Cthulhu (Delta Green)
Introduction	6-15	The Labyrinth	APU8121	2019	Arc Dream Publishing	Call of Cthulhu (Delta Green)
Introduction	7-46	Masks of Nyarlathotep	CHA23153	2018	Chaosium	Call of Cthulhu (Classic)
Introduction	4-6	The Masks of Nyarlathotep Companion (Limited)	60-MONC-08	2016	Sixtystone Press	None
Introduction	4-6	The Masks of Nyarlathotep Companion (Unlimited)	60-MONC-03 (?)	2016	Sixtystone Press	None
Introduction	10-17	Investigator's Handbook	CHA23136	2015	Chaosium	Call of Cthulhu (Classic)
Introduction	4	Call of Cthulhu 7th Edition Quick Start	CHA23131	2013	Chaosium	Call of Cthulhu (Classic)
Introduction	4-9	De Profundis	CB71401	2010	Cubicle 7	De Profundis
Introduction	4-13	Handler's Guide	APU8113	2018	Arc Dream Publishing	Delta Green
Introduction	4-7	Flotsam and Jetsam: Introduction		2019	Chaosium	Call of Cthulhu (Classic)
Introduction	7-24	Regency Cthulhu	CHA23179	2022	Chaosium	Call of Cthulhu (Regency)
Introduction	3	The Interstellar Colonial Marine Corps		2008	Self Published	Call of Cthulhu (Rising)
Introduction	7-13	Pax Cthuliana		2017	Two Starving Gnolls	Call of Cthulhu (Classic)
Introduction *	4-34	Nocturnum: d20	CC05	2002	Fantasy Flight Games	Call of Cthulhu (Now)
Introduction	6-21	The Dread House	HDG8000	2017	Hammerdog Games	Call of Cthulhu (Strange Aeons) [13th to 15th C], Pathfinder, Dungeons and Dragons
Introduction	16-31	The Oldskull Necronomicon	CO37	Jun 2017	Wonderland Imprints	Dungeons and Dragons
Introduction	7-10	The Serpent and the Sands	MUH0010330	2023	Modiphius Entertainment	Achtung! Cthulhu
Introduction	8-11	Vive La Resistance	MUH0010329	Jul 2023	Modiphius Entertainment	Achtung! Cthulhu
Introduction	3-4	Athenaeum Illuminatus		Oct 2023	Chaosium	Call of Cthulhu (Classic)
Introduction	6-8	Cthulhu Invictus: Britannia and Beyond	GGP2301	2023	Golden Goblin Press	Call of Cthulhu (Invictus)
Introduction	1-4	H P Lovecraft's Book of Yog-Sothery	cr5061	2023	Cthulhu Reborn	Fhtagn, APOCTHULHU, Cthulhu Eternal
Introduction	1-2	R'lyehwatch		2023	Third Chair Games	R'lyehwatch
Introduction	3-9	Templa Illuminatus		Jan 2024	Chaosium	Call of Cthulhu (Classic)
Introduction	6-9	Unexplored	MUH0010350	Feb 2024	Modiphius Entertainment	Achtung! Cthulhu
Introduction	3-4	The Promethean Highway		Feb 2024	Chaosium	Call of Cthulhu (Strange Aeons) [2902]
Introduction	6-9	Unexplored: Swamp and Tundra	MUH0010372	May 2024	Modiphius Entertainment	Delta Green
Introduction	5-10	D-Day: The Darkest Day	MUH0010317	May 2024	Modiphius Entertainment	Achtung! Cthulhu
Introduction	7-16	The Order of the Stone	CHA23160	Sep 2024	Chaosium	Call of Cthulhu (Classic)
Introduction	4-7	Trail of Cthulhu Quickstart Rules	PELGT201QS	Oct 2024	Pelgrane Press	Trail of Cthulhu
Introduction	9-10	Cthulhu Ireland		Dec 2024	Chaosium	Call of Cthulhu (Classic)
Introduction		Zero Point, Part 3 - Code of Honour	MUH051257SW	2018	Modiphius Entertainment	Savage Worlds (Achtung!)
Introduction		Cthulhu Dark Ages	CHA23165	2020	Chaosium	Call of Cthulhu (Dark Ages)
Introduction	4-11	Tomes of Terror		Jun 2018	Chaosium	Call of Cthulhu (Classic)
Introduction	5-7	Pokethulhu		2000	Squishy Brain Games	Pokethulhu
Introduction	6-12	Realms of Cthulhu	REB20001	2010	Reality Blurs	Savage Worlds (Realms of Cthulhu)
Introduction	5-16	H P Lovecraft Preparatory Academy		2019	Third Eye Games	H P Lovecraft Preparatory Academy
Introduction	5-16	H P Lovecraft Preparatory Academy: Savege Worlds Edition		2019	Third Eye Games	Savage Worlds
Introduction	8-21	Impossible Landscapes	APU8145	2021	Arc Dream Publishing	Delta Green
Introduction	16-32	The Oldskull Necronomicon	LOV1	2017	Wonderland Imprints	Advanced Dungeons and Dragons
Introduction	16-19	The Void	WDF33000	2013	WildFire Games	The Void
Introduction	8-9	Vessels of the Void: Spaceships	WDF33620	2015	WildFire Games	The Void
Introduction	5-10	Gamemaster's Guide	MUH051744	2021	Modiphius Entertainment	Achtung! Cthulhu
Introduction	5-8	Player's Guide	MUH051742	2021	Modiphius Entertainment	Achtung! Cthulhu
Introduction	4-7	The Whisperer and Darkness		2018	Fourth Wish Games	The Whisperer and Darkness
Introduction	4-5	Whispers in the Dark Quickstart	WitDQS	2020	Saturday Morning Scenarios	Dungeons and Dragons
Introduction		Flotsam and Jetsam: Introduction and the Star Brothers		2019	Chaosium	Call of Cthulhu (Classic)
Introduction	12-19	Keeper Rulebook	CHA23175	2021	Chaosium	Call of Cthulhu (Classic)
Introduction	5-13	Gamesmaster's Guide	MUH0860110	Sep 2025	Modiphius Entertainment	Cohors Cthulhu
Introduction	5-11	Player's Guide	MUH0860108	Sep 2025	Modiphius Entertainment	Cohors Cthulhu
Introduction	4-11	Rewind		Nov 2025	Chaosium	Call of Cthulhu (Now)
Introduction	5-12	The Eyes That Behold	YH-C-8	Dec 2025	Chaosium	Call of Cthulhu (Gaslight)
Introduction	2-10	Convicts and Cthulhu RPG Core Rules	cr6300	Sep 2025	Cthulhu Reborn	Cthulhu Eternal
Introduction	5-10	The Norway Projekt	MUH0010319	Jan 2026	Modiphius Entertainment	Achtung! Cthulhu
Introduction	7-12	Tales of Manace and Mystery	YH-C-15	Mar 2026	Chaosium	Call of Cthulhu (Classic)
Introduction	5-8	Laws, Taxes and Regulations		Apr 2026	Self Published	Call of Cthulhu (Classic)
Introduction	5-11	Laurium Adventures	MUH0860136	2026	Modiphius Entertainment	Cohors Cthulhu
Introduction	6-14	Elder Mythos		2025	Mana Project Studio	Elder Mythos
Introduction	4-9	High School Cthulhu Quickstart		2024	Gear Games	High School Cthulhu
Introduction	5-13	Campfire Tales	CHA23193	Apr 2026	Chaosium	Call of Cthulhu (Classic)
Introduction and Considerations	2-9	Sun Spots	4	2017	Weird 8	Call of Cthulhu (Classic)
Introduction and Orientation	8-18	Tatters of the King	CHA23104	2006	Chaosium	Call of Cthulhu (Classic)
Introduction and Overview	3-5	Spiralis		2018	Self Published	Spiralis
Introduction to 10th Century France	21-34	The Abbey	CHA0088	2004	Chaosium	Call of Cthulhu (Dark Ages)
An Introduction to 1920s Scotland	5-28	Shadows Over Scotland	CB7353	2011	Cubicle 7	Call of Cthulhu (Classic)
Introduction to Applied Occult Computing	8-17	Introduction to Applied Occult Computing	CB70803	Jun 2025	Cubicle 7	The Laundry	England
Introduction to the Book of Dzyan	12-69	The Book of Dzyan	CHA6027	2000	Chaosium	Call of Cthulhu (Classic)
Introduction to the Game	9-13	Lovecraftesque		2016	Black Armada Games	Lovecraftesque
Introduction to the Setting	4-9	CthulhuTech Quick Start Rules		2009	WildFire Games	CthulhuTech
Introduction: Gazing into the Dark Mirror	2-3	Dark Mirror	CHA0338	2007	Chaosium	Call of Cthulhu (Classic)
Introduction: The Storm	3-12	Children of the Storm	CHA0394	2010	Chaosium	Call of Cthulhu (Classic)
The Intruder Beyond Time	Feb 2018	Reckoning of the Dead			Self Published	Call of Cthulhu (Now)	Oceania
Intruder from Beyond	Character (F)	The Twilight Beckons	CT40	2011	Fantasy Flight Games	Call of Cthulhu LCG
The Intruder Within		RPG Archive			Self Published	Call of Cthulhu (Classic)	Massachusetts; 1920s
The Invasion *		The Invasion		2021	Petersen Games	Cthulhu Wars
Invasive Procedures	4-35	Invasive Procedures	PELG09	2011	Pelgrane Press	Trail of Cthulhu, Fear Itself
Inventor of Strange Devices I	Adventure (F)	House of Tindalos			Self Published	Mythos
Inventor of Strange Devices II	Adventure (F)	House of Tindalos			Self Published	Mythos
Inventor of Strange Devices III	Adventure (F)	House of Tindalos			Self Published	Mythos
Inversion	130-134	Inversion		Feb 2024	Chaosium	Call of Cthulhu (Now)	2023
Investigating Postergeists	33-40	Parapsycologist's Handbook	CHA0085	2003	Chaosium	Call of Cthulhu (Classic), Call of Cthulhu (Gaslight), Call of Cthulhu (Now)
Investigating the Colony	32	Convicts and Cthulhu	cr3005	2016	Cthulhu Reborn	Call of Cthulhu (Convicts)
The Investigation *	89	Taint of Madness	CHA2354	1995	Chaosium	Call of Cthulhu (Classic)	Arkham; 1920s
Investigation	45-56	The Pennywell Hangmen		2008	Self Published	Call of Cthulhu (Classic)
Investigation	21-24	Eldritch Instinct		2025	Self Published	Eldritch Instinct
Investigative Abilities	4-37	Keeper's Resource Book and Screen	PELGT04	2008	Pelgrane Press	Trail of Cthulhu
Investigative Abilities	29-33	The Apocalypse Machine	PELGT24	2011	Pelgrane Press	Trail of Cthulhu
Investigative Abilities	30-34	Cthulhu Apocalypse	PELGT40	2015	Pelgrane Press	Trail of Cthulhu
Investigative Feats	128-129	Worlds of Cthulhu	2	Feb 2005	Pegasus Press	Call of Cthulhu (d20)
Investigative Horror in the Dark Ages	98-105	Cthulhu Dark Ages	CHA23143	2015	Chaosium	Call of Cthulhu (Dark Ages)
Investigative Horror in the Dark Ages		Cthulhu Dark Ages	CHA23165	2020	Chaosium	Call of Cthulhu (Dark Ages)
Investigative Reporter	Character (U)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
The Investigator	9-50	Trail of Cthulhu	PELGT01	2007	Pelgrane Press	Trail of Cthulhu
The Investigator	9-50	Player's Guide	PELGT03	2007	Pelgrane Press	Trail of Cthulhu
The Investigator	9-50	Trail of Cthulhu: Player's Guide	PELGT03D	2007	Pelgrane Press	Trail of Cthulhu
Investigator Archetypes for Zgrozy		Investigators of Horrors!		Oct 2019	Chaosium	Call of Cthulhu (Classic)
Investigator Creation	6-26	Cthulhu Dark Ages	CHA23143	2015	Chaosium	Call of Cthulhu (Dark Ages)
Investigator Creation	23-36	Tiny Cthulhu	GKG-071	2021	Gallant Knight Games	Tiny Cthulhu
Investigator Creation	11-16	Call of Cthulhu	CHA2324	1989	Chaosium	Call of Cthulhu (Classic)
Investigator Domain 1	Domain (F)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain 1	Domain (F)	Eldritch Edition Premium Starter Set		2005	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain 2	Domain (F)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain 2	Domain (F)	Eldritch Edition Premium Starter Set		2005	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain 3	Domain (F)	Arkham Edition		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain 3	Domain (F)	Eldritch Edition Premium Starter Set		2005	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain I1	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain I2	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain I3	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain M1	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain M2	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Domain M3	Domain (F)	Arkham Edition Premium Starter Set		2004	Fantasy Flight Games	Call of Cthulhu CCG
Investigator Expansion Pack		Investigator Expansion Pack		2020	Purple Meeple Games	Cultistorm
Investigator Mug Set		Investigator Mug Set	CHA9303		Chaosium	None
Investigator Occupations	25-42	The 7th Edition Guide to Cthulhu Invictus	GGP1801	2018	Golden Goblin Press	Call of Cthulhu (Invictus)
Investigator Organizations	122-145	Investigator's Handbook	CHA23136	2015	Chaosium	Call of Cthulhu (Classic)
Investigator Passports	1-6	Investigator Passports		2019	base113 Games	Trail of Cthulhu, Call of Cthulhu (Classic)
Investigator Promo Cards		Investigator Promo Cards		2017	Fantasy Flight Games	Elder Sign
Investigator Sheets		Investigator Sheets	CHA5111	1993	Chaosium	Call of Cthulhu (Classic)
Investigator Skills	43-48	The 7th Edition Guide to Cthulhu Invictus	GGP1801	2018	Golden Goblin Press	Call of Cthulhu (Invictus)
Investigator Templates	76-81, 45	The Black Seal	2	Mar 2003	Brichester University Press	Call of Cthulhu (Now)
The Investigator's Gazeteer	58-72	Kingdom of the Blind	CHA0359	2008	Chaosium	Call of Cthulhu (Classic)
Investigator's Guide to 1920s New Orleans	9-26	Tales of the Crescent City	GGP1401	2014	Golden Goblin Press	Call of Cthulhu (Classic)
Investigator's Resources	20-52	World War Cthulhu: The Darkest Hour	CB71939	2013	Cubicle 7	Call of Cthulhu (WWII)
Investigator's Resources	24-62	World War Cthulhu: Cold War	CB71970	2016	Cubicle 7	Call of Cthulhu (Cold War)
Investigators	70-89	Cthulhupunk	SJG01695	1995	Steve Jackson Games	GURPS (CthulhuPunk)
The Investigators	6-8	The Dead White World	PELGT19	2011	Pelgrane Press	Trail of Cthulhu
The Investigators	74-76	Cthulhu Apocalypse	PELGT40	2015	Pelgrane Press	Trail of Cthulhu
Investigators		Chaosium Digest	v01n04	Feb 1993	Chaosium	Call of Cthulhu (Classic)
Investigators		Investigators		2019	Petersen Games	Cthulhu Wars
The Investigators	52-56	Stealing Cthulhu		2011	Self Published	Cthulhu Dark
Investigators and Skill Progression		Chaosium Digest	v17n09	Dec 1996	Chaosium	Call of Cthulhu (Classic)
Investigators as Tome Authors		Chaosium Digest	v23n02	Feb 1998	Chaosium	Call of Cthulhu (Classic)
Investigators in the Holy Land	5-10	Dark Crusades	CHA0414	2013	Chaosium	Call of Cthulhu (Dark Ages)
Investigators Kit		Investigators Kit	CHA5102		Chaosium	Call of Cthulhu (Classic)
Invictus		Big A** Book of Hooks		Jun 2025	Chaosium	Call of Cthulhu (Invictus)
Invisible Fires		Invisible Fires		Dec 2023	Librarians and Leviathans	Cthulhu Eternal	Nebraska; July; 2022
Invisible Sun	20-67	Lost in the Lights	60-NUK01	2013	Sixtystone Press	Call of Cthulhu (Now)	Nevada
Invisible Sun	20-67	Lost in the Lights	60-NUK01-01	2017	Sixtystone Press	Call of Cthulhu (Now)	Nevada
The Invitation	2004	talesofterror.net			Self Published	Call of Cthulhu (Classic)
An Invitation in Yellow		An Invitation in Yellow		Feb 2018	Chaosium	Call of Cthulhu (Classic)	Massachusetts; March; 1920; Byakhee
Invitation Only	2-30	Invitation Only	WitD1	2020	Saturday Morning Scenarios	Whispers in the Dark	New Orleans; 1876; Spring
Invitation to Play	9-19	Serendipity's Circle	6	Win 1995	Self Published	The Whispering Vault, Call of Cthulhu (Now), Immortal: The Invisible War, Nephilim	1996
Invitation to the Dance	19-38	The Primal State	CHA0344	2007	Chaosium	Call of Cthulhu (Classic)	Vermont
Invitation to the Dance	16-23	The Whisperer	5	Aut 2003	Severn Valley Press	Call of Cthulhu (Now)	Vermont
Invocation of Pythagoras	Spell (C)	Serena's Dojo		1999	Self Published	Mythos
Invocation of the Abyss	Event (F)	The Mark of Madness	CT66	2015	Fantasy Flight Games	Call of Cthulhu LCG
Invoice Engine	84-96	Black Bag Jobs Reopened	CB70804	Jun 2025	Cubicle 7	The Laundry
Involuntary		The Way it Went Down Volume 2	APU8013	Apr 2023	Arc Dream Publishing	Delta Green
The Involuntary Witness *	80	Taint of Madness	CHA2354	1995	Chaosium	Call of Cthulhu (Classic)	London; 1890s
Io	20-22	Jovian Nightmares	CHA0367	2009	Chaosium	Call of Cthulhu (Rising)
Iod	Character (F)	For the Greater Good	CT64	2015	Fantasy Flight Games	Call of Cthulhu LCG
Ipiutak	Support (F)	Seekers of Knowledge	CT59	2012	Fantasy Flight Games	Call of Cthulhu LCG
Ira Incensa		Ira Incensa		Mar 2021	Chaosium	Call of Cthulhu (Classic)	1920s
Iranon the Explorer	Ally (C)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
Ire of the Void		Ire of the Void	EAH12	2017	Fantasy Flight Games	Arkham Horror: The Card Game
Irem	Location (F)	Antarctica			Self Published	Mythos
Irem	Support (F)	The Sleeper Below	CT63	2014	Fantasy Flight Games	Call of Cthulhu LCG
Irem, City of the Pillars	Support (R)	Forgotten Cities		2005	Fantasy Flight Games	Call of Cthulhu CCG
Irem, the Lost City of Pillars	297-323	The Blessed and the Blasphemous	SOS-HORROR3	Oct 2023	Sons of the Singularity	Call of Cthulhu (WWII)	Morocco; 1940; October
Irish Channel	Support (F)	The Thousand Young	CT65	2015	Fantasy Flight Games	Call of Cthulhu LCG
Irish Creatures of Legend	44-50	Mysteries of Ireland	CHA0408	2012	Chaosium	Call of Cthulhu (Classic)
Iron	95-123	The Keeper's Companion Vol 2	CHA2395	2002	Chaosium	Call of Cthulhu (Classic)
The Iron Crib	2001	talesofterror.net			Self Published	Call of Cthulhu (Classic)
The Iron Cross	Support (F)	Terror in Venice	CT61	2013	Fantasy Flight Games	Call of Cthulhu LCG
Iron Edda: Claws of Metal and Bone	73-80	Worlds of Catthulhu	COCAT03	2015	CATTHULHU.com	Call of Cthulhu (Cathulhu)
Iron Edda: Claws of Metal and Bone	C:73-80	Call of Catthulhu Deluxe		2014	CATTHULHU.com	Call of Cthulhu (Cathulhu)
The Iron Ghost	17-29	Fearful Passages	CHA2335	1992	Chaosium	Call of Cthulhu (Classic)	1920s
The Iron-Banded Box	124-144	Strange Aeons II	CHA23117	2009	Chaosium	Call of Cthulhu (Strange Aeons) [Sengoku period Japan]	Japan; 16th Century AD; Chthonian; Greater Race
Ironmind	Spell (R)	Dreamlands	CAO1307-1	1997	Chaosium	Mythos
Irradiated Scavenger	Oct 2022	shoggoth.net			Self Published	Call of Cthulhu (Classic)
Irrational Express		Irrational Express		2003	Self Published	Call of Cthulhu (Now)	England
Irrational Means	Support (U)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Irregular Berevement Protocols	2021	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Washington; September
Irregular Warfare	59-80	World War Cthulhu: The SOE Handbook	CB71942	2015	Cubicle 7	Call of Cthulhu (WWII)
Irresistable Allure	Event (P)	Arkham Edition Promo		2004	Fantasy Flight Games	Call of Cthulhu CCG
IRS Auditor	Event (U)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
Is It Friday Yet?	96-98	Don't Let Them Take You Alive		2017	First United Church of Cthulhu	Don't Let Them Take You Alive
Is Nothing Sacred		GM	18	Feb 1990	Croftward Limited	Call of Cthulhu (Classic)
Is There a Doctor in the House?	5-9	Is There a Doctor in the House?		2014	Self Published	Call of Cthulhu (Strange Aeons) [Whoniverse]
Is This Heaven?	66, 68	Shadis	19.5	Jun 1995	Alderac Entertainment Group	Call of Cthulhu (Classic)
IS0-L8	2023	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)
Isaac Miles	Character (F)	Denizens of the Underworld	CT62	2014	Fantasy Flight Games	Call of Cthulhu LCG
The Island		Tales of Terror (I)		1990	Pagan Publishing	Call of Cthulhu (Classic)	Dreamlands
The Island	20-21	Tales of Terror (III)			Self Published	Call of Cthulhu (Classic)	Dreamlands
The Island	1990	talesofterror.net			Self Published	Call of Cthulhu (Classic)	Dreamlands
The Island		The Island	SKP01110	2011	Skirmisher Publishing	Call of Cthulhu (Classic)	New York State; 1947; Deep One
The Island	Adventure (F)	House of Tindalos			Self Published	Mythos
The Island	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
The Island		RPG Archive			Self Published	Call of Cthulhu (Classic)	Dreamlands
The Island	4-22	The Island		Jul 2024	Chaosium	Call of Cthulhu (Classic)	Portugal; 1925
Island 256		Island 256		May 2019	Chaosium	Call of Cthulhu (WWII)	Oceania
Island Approach	00:32	Eternal Lies Suite	PELGT17	2010	Pelgrane Press	Trail of Cthulhu
Island Getaway	4-24	Island Getaway		Dec 2023	Modiphius Entertainment	Achtung! Cthulhu	Solomon Islands; October; 1942; Deep One
Island Hermit	Character (F)	Ancient Horrors	CT17	2008	Fantasy Flight Games	Call of Cthulhu LCG
An Island Near the Equator	Adventure (F)	House of Tindalos			Self Published	Mythos
The Island of Dagon	1-21	The Island of Dagon		2021	One Shot RPG	One Shot RPG	At Sea; 2020s
The Island of Insanity	5-15	The Island of Insanity	YH-C-9	Jun 2025	Chaosium	Call of Cthulhu (Classic)	Argentina; 1937
The Island of Insanity	117-126	Tales of Manace and Mystery	YH-C-15	Mar 2026	Chaosium	Call of Cthulhu (Classic)	1937
The Island of Splendour	246-277	Shadows of Atlantis	MUH01022CS	2015	Modiphius Entertainment	Savage Worlds (Achtung!), Call of Cthulhu (Achtung!)	Greenland; May; 1940
Island of the Damned	5-26	Caligo Accedendum Tournament	CHA0309	2004	Chaosium	Call of Cthulhu (Dark Ages)	Dreamlands; Spring
The Island of the Dead		Chaosium Digest	v05n11	Feb 1994	Chaosium	Call of Cthulhu (Classic)
Island of the Poor Fellows	63-87	The Hollow Remains		Feb 2025	Revel Tales	Call of Cthulhu (Dark Ages)	Italy
The Island Paradises	11-43	The Bermuda Triangle	CHA2372	1998	Chaosium	Call of Cthulhu (Now)
The Islands	107-135	Shadows Over Scotland	CB7353	2011	Cubicle 7	Call of Cthulhu (Classic)
The Isle of Dread	Adventure (F)	Eric Johnson Mythos Collection			Self Published	Mythos
Isle of Lost Souls	185-245	Shadows of War	CHA0349	2008	Chaosium	Call of Cthulhu (WWII)	Greece; 1940s
Isle of Madness		Isle of Madness		Dec 2017	Chaosium	Call of Cthulhu (Classic)	Atlantic Ocean; 1930s
Isle of the Damned		The Grindhouse Volume 1		Sep 2021	Chaosium	Call of Cthulhu (Strange Aeons) [1974]	Maine; Summer; 1974
Isle of the Damned		The Grindhouse: Ultimate Collection		Aug 2022	Chaosium	Call of Cthulhu (Strange Aeons) [1974]	Maine; Summer; 1974
The Isles of Shoals and Other Innsmouth Inspiration	26-30	The Arkham Gazette	2	Nov 2013	Sentinel Hill Press	Call of Cthulhu (Classic)
Isolated Town	Jul 2009	talesofterror.net			Self Published	Call of Cthulhu (Classic)
Isolation		The Way it Went Down Volume 2	APU8013	Apr 2023	Arc Dream Publishing	Delta Green
It Came From Beyond	Adventure (F)	House of Tindalos			Self Published	Mythos
It Came From Beyond	Adventure (F)	Eric Johnson Mythos Collection			Self Published	Mythos
It Came From Beyond	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
It Came from RKO Pictures	Adventure (F)	House of Tindalos			Self Published	Mythos
It Does a Body Good	2018	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	May
It Never Happened!	Adventure (F)	House of Tindalos			Self Published	Mythos
It Never Happened!	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
It Opens Doors	Nov 2019	Reckoning of the Dead			Self Published	Call of Cthulhu (Now)
It Sees Me When I'm Not Looking		A Season in Carcosa	MRP0021	2012	Miskatonic River Press	None
It Started With a Mouse		It Started With a Mouse		Dec 2024	Chaosium	Call of Cthulhu (Classic)	Australia; 1920s; Mi-Go
It Was Not Her		The Way It Went Down		2018	Arc Dream Publishing	Delta Green
It Was the Day of the Deep One	269-?	Tales out of Innsmouth	CHA6024	2006	Chaosium	Call of Cthulhu (Classic)
The 'It' Girl	2-5	The Black Seal	4	Aut 2023	Sixtystone Press	Call of Cthulhu (Classic)
It's Bedlam in Here!	36-38	The Unspeakable Oath	5	May 1992	Pagan Publishing	Call of Cthulhu (Gaslight)
IT's in the Cards	30	The Whisperer	1	Sum 1999	Severn Valley Press	Mythos
IT's in the Cards	32	The Whisperer	4	Spr 2001	Severn Valley Press	Mythos
It's Just My Imagination	Adventure (F)	House of Tindalos			Self Published	Mythos
It's Not What it Seems...	4-12	It's Not What it Seems...		May 2025	Chaosium	Call of Cthulhu (Now)	England; Spring; 1998
It's Plantlife Jim, but not as we know it, Part 1		Chaosium Digest	v38n02	Nov 2003	Chaosium	Call of Cthulhu (Classic)	Arkham; 1920s
It's Plantlife Jim, but not as we know it, Part 2		Chaosium Digest	v38n03	Nov 2003	Chaosium	Call of Cthulhu (Classic)	Arkham; 1920s
It's Raining Men	2022	The Fairfield Project			Self Published	Call of Cthulhu (Delta Green)	Alaska; Summer
It's Real, I Know It Is	Adventure (F)	House of Tindalos			Self Published	Mythos
It's the End of the World As We Know It	68-71	Miskatonic University	CHA2352	1995	Chaosium	Call of Cthulhu (Classic)
It's the End of the World as We Know It	Adventure (F)	House of Tindalos			Self Published	Mythos
It's The End Of The World As We Know It	Adventure (F)	Unofficial Mythos Adventure Archive			Self Published	Mythos
It?s Not What you Know		TinyZine	50	Aug 2024	Gallant Knight Games	Tiny Cthulhu
An Item of Mutual Interest	94-105	Alien Intelligence		1998	Armitage House	Call of Cthulhu (Delta Green)
Items	19-25	The Book of Random Tables 1920s - 1930s		2020	dicegeeks	Call of Cthulhu (Classic), Trail of Cthulhu
Ithaqua	Monster (C)	Limited	CAO1300-1	1996	Chaosium	Mythos
Ithaqua the Wind-Walker		Ithaqua the Wind-Walker		2023	CMON	Cthulhu: Death May Die (Fear of the Unknown)
Ithaqua, The Killing Cold	Character (R)	Forgotten Cities		2005	Fantasy Flight Games	Call of Cthulhu CCG
Ithaquan Druid		Creature Feature Quarterly	2	Aug 2018	Self Published	Whispers in the Dark
Itinerant Hotel		The Itinerant Hotel		May 2021	Chaosium	Call of Cthulhu (Classic)	Arkham; July; 1922
Itinerant Scholar	Character (U)	Masks of Nyarlathotep		2005	Fantasy Flight Games	Call of Cthulhu CCG
Itinerant Scholar	Character (F)	Call of Cthulhu The Card Game	CT18	2008	Fantasy Flight Games	Call of Cthulhu LCG
Its Full Of Stars!	Event (R)	New Aeon	CAO1311-1	1997	Chaosium	Mythos
Ivan and the Hurting Doll		Heroes of Red Hook	GGP		Golden Goblin Press	None
The Ivory Box	12-13	Eldritch Hack		2022	Dungeon University Press	Eldritch Hack