| Title | Pages | Publication | Code | Date | Publisher | System (Setting) |
|---|
 T. E. Lawrence | Ally (U) |  Legends of the Necronomicon | CAO1303-1 | 1996 | Chaosium | Mythos
| |
 A Tableau of Red | |  A Tableau of Red | | Mar 2020 | Noralle | Call of Cthulhu (Classic)
| |
 The Tablet of Leng | 54-58 |  Protodimension | 8 | Spr 2011 | Kinstaff Media | Call of Cthulhu (Now)
| |
 The Tablets of Destiny | 37-41 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Tablets of Nhing | Support (F) | The Sleeper Below | CT63 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tablets of Ur-Nansha | 59-75 |  Mysteries of Morocco | CHA0306 | 2004 | Chaosium | Call of Cthulhu (Classic)
| |
| The Tablets of Ur-Nansha | 67-83 | Secrets of Morocco | CHA23105 | 2008 | Chaosium | Call of Cthulhu (Classic)
| |
| Tachyphobia | Event (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Tactical Nuclear Bomb | Artifact (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| The Taint of Dracula | 31-38 | Role Player Independent | 2 | Jan 1993 | Symbiosis Publishing | Call of Cthulhu (Classic)
| |
| Tainted Fruit: A Taint of Shub-Niggurath | Oct 2015 |  shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tainted Informant | Character (U) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tainted Rosebush: Tain of Shub-Niggurath | Oct 2015 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Take the Force of the Blow * | 1-18 | Take the Force of the Blow | | 1999 | Self Published | Call of Cthulhu (Classic)
| |
| Take-Home Container | 2019 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Taking an Oath in One-Quarter Time | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Taking No Chances | Event (C) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| A Tale from the Mukhabarat Basement | 2014 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
 Tale of Priest Kwan | 563-566 |  The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| Tale of Priest Kwan | 436-439 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| A Tale of the 13th Floor | Dec 2017 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Talent Abilities | 11-19 | Elder Godlike | MUH050026 | 2016 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Godlike
| |
| Talents in Mass Combat | 54-55 | Elder Godlike | MUH050026 | 2016 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Godlike
| |
| Talents in the Secret War | 5-10 | Elder Godlike | MUH050026 | 2016 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Godlike
| |
| The Tales Dead Men Tell | 2006 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Tales from the Crucible | 1-11 | Tales from the Crucible | MPS01042G | 2013 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
| |
| Tales From the Crypt | |  Chaosium Digest | v07n02 | Aug 1994 | Chaosium | Call of Cthulhu (Classic)
| |
| Tales of Nephren-Ka | 10-17 | The Unspeakable Oath | 18 | Dec 2010 | Pagan Publishing | Call of Cthulhu (Classic)
| |
 Tales of the Blair Witch Project | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic)
| |
| Tales of the Casket Girls | | Tales of the Casket Girls | | Aug 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| Talk of Goatswood | 101-106 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic)
| |
| The Talking Skull | Artifact (F) | Scooby Doo Set 3 | | n/a | Self Published | Mythos
| |
| The Tall Lighthouse | Location (R) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Tamara | |  Fight or Flight Promos | | 2021 | CMON Limited | Cthulhu: Death May Die
| |
| Taming the Storm | Conspiracy (F) | The Wailer Below | CT37 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tanis Root | Artifact (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Tank | Artifact (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| The Tapestry | | Delta Green Anomalies | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Tapping the Shadow Fund | Event (R) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Taran-Ish | Ally (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Target Verification | 2008 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Targhuz | Oct 2015 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tarnished Gold | 2020 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Taser | Artifact (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Task Force | Character (U) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Task Force | Character (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Task Force | Character (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Task Force Captain | Character (U) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Taste of Lifeblood | Event (F) | Shadow of the Monolith | CT52 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| A Taste of Music | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Tatterdemallion | 17-42 | Fatal Experiments | CHA2328 | 1990 | Chaosium | Call of Cthulhu (Classic)
| |
| Tatterdemallion * | | Tatterdemallion | | 1988 | Self Published | Call of Cthulhu (Classic)
| |
| The Tattered Cloak | Support (F) | The Key and the Gate | CT60 | 2013 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tattoo | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Tattoo | 1996 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tattoo Artist | Character (F) | Murmurs of Evil | CT35 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tattoo Parlor | Support (F) | Murmurs of Evil | CT35 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tattooed Thug | Character (F) | The Cacophony | CT39 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| TaZmania | | TaZmania | | 2021 | SchilMil Games | AuZtralia
| |
| Tch-Kuloo | Ally (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Tch-Kuloo's Igloo | Location (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Tcho-Tcho | | Ken Writes About Stuff | v3n1 | Mar 2015 | Pelgrane Press | Trail of Cthulhu
| |
| Tcho-Tcho | | Tcho-Tcho | CW-F5 | 2017 | Petersen Games | Cthulhu Wars
| |
| Tcho-Tcho Emissary | Character (C) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tcho-Tcho Lama, Elder Hierophant | Character (R) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tcho-Tcho People | Monster (U) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Tcho-Tcho Talisman | Support (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tcho-Tcho Talisman | Support (U) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tcho-Tcho Tribe | Character (F) | Ancient Horrors | CT17 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tcho-Tcho Tribes | | Tcho-Tcho Tribes | | 2020 | Petersen Games | Cthulhu Wars
| |
| Tea and Biscuits | 76-79 | Challenge | 71 | 1993 | Games Designers Workshop | Call of Cthulhu (Classic)
| |
| Teachers and Tentacles | 1-2 | Teachers and Tentacles | | 2016 | Second Thought Games | Teachers and Tentacles
| |
| Teaching Guide | 154-164 | Lovecraftesque | | 2016 | Black Armada | Lovecraftesque
| |
| Teamwork | Support (R) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tear Gas | Event (F) | The Thing from the Shore | CT23 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tear in Time | Support (F) | For the Greater Good | CT64 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tears of Tindalos | 73-74 | Book of Dark Wisdom | 2 | Win 2003 | Elder Sign Press | Call of Cthulhu (Classic)
| |
| Technology | 84-101 | Chthonian Stars | WDF25020 | 2011 | WildFire Games | Traveller (Chthonian Stars)
| |
| Technology | 53-55 | First Book of Things | CHA0307 | 2004 | Chaosium | Call of Cthulhu (Classic)
| |
| Technology and Science of the Twenties and Thirties | 30-38 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Technology, Communications and the News | A:82-85 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic)
| |
| Technology, Weapons, and Equipment | 83-91 | Player's Guide | PELGT03 | 2007 | Pelgrane Press | Trail of Cthulhu
| |
| TechnoVampire | Feb-2021 | shoggoth.net | | n/a | Self Published | Dungeons & Dragons
| |
| Techtych: Blood Test: Porphyria: The Vampire Disease? | 31-32 | Cryptych | 2 | Sep 1993 | ILM International | Call of Cthulhu (Classic)
| |
| Tekeli-li! Tekeli-li! | Event (F) | Antarctica | | n/a | Self Published | Mythos
| |
 Telegrams | | Telegrams | | Jan 2018 | Chaosium | Call of Cthulhu (Classic)
| |
| Telepathic Chthonian | Character (F) | The Gleaming Spiral | CT44 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Television | Event (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Tell me, have you seen the Yellow Sign? | 56-74 | The Great Old Ones | CHA2321 | 1989 | Chaosium | Call of Cthulhu (Classic)
| |
| Tell Me, Have You Seen the Yellow Sign? | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Teller of Tales | Character (U) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Telling no Tales | Event (R) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tempest Mountain | Location (C) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Templates for Civilian and Military Organisations | 1998 | Bristol Consortium | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Temple | Adventure (U) | Cthulhu Rising | CAO1302-1 | 1996 | Chaosium | Mythos
| |
| The Temple in the Hills | Location (F) | Scooby Doo Set 2 | | Mar 1999 | Self Published | Mythos
| |
| Temple in the Ice | 241-266 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now)
| |
| Temple in the Ice | 6-29 | Opifex Bimonthly | 24 | Mar 2000 | Self Published | Call of Cthulhu (Now)
| |
| Temple in the Ice | 1-26 | Temple in the Ice | | 2000 | Self Published | Call of Cthulhu (Now)
| |
| The Temple of Bokrug | Location (U) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Temple of Bubastis | Support (U) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Temple of Dagon | Support (R) | Unspeakable Tales | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Temple of Haon-Dor | Support (U) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Temple of Loveliness at Kiran | Location (U) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Temple of Nephren-Ka | Support (R) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Temple of Pain | Location (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Temple of Ramasekva | Support (R) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Temple of R'lyeh | Support (F) | Never Night | CT50 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Temple of the Elder Ones | Location (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Temple of the Great Ones | Location (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| The Temple of the Moon | 86-108 | Cthulhu Classics | CHA3301 | 1989 | Chaosium | Call of Cthulhu (Classic)
| |
| The Temple of the Moon | 18-40 | Terror from the Stars | CHA2313 | 1986 | Chaosium | Call of Cthulhu (Classic)
| |
| The Temple of the Toad | | Mists of the Aeons | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Temple of the Toad | 186-204 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Temple of Yog-Sothoth | Support (C) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Temple to Aesathog | Location (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Temporal Lash | Spell (R) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Temporal Slip | Event (F) | The Key and the Gate | CT60 | 2013 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Temporary Insanity | 8-9 | Opifex Bimonthly | 11 | Jan 1998 | Self Published | Call of Cthulhu (Classic)
| |
| Temporary Insanity in Combat | | Chaosium Digest | v23n02 | Feb 1998 | Chaosium | Call of Cthulhu (Classic)
| |
| Temporary Setback | 118-119 | Damnation View | WDF23300 | 2009 | WildFire Games | Framewerk (CthulhuTech)
| |
| Ten | | Ten | | Oct 2019 | Chaosium | Call of Cthulhu (Now)
| |
| The Ten Commandments of Cthulhu Hunting | 121-123 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic)
| |
| The Ten Commandments of Directing a LARP | 1996 | hyperwerx.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Ten Evil Toys | Dec 2001 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Ten Evil Toys | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic)
| |
| Ten Killer Cards from the Mythos Standard Game Set | | Chaosium Digest | v27n08 | Feb 1999 | Chaosium | Mythos
| |
| The Ten Plagues Deck | | Thastygliax's Vault | | n/a | Self Published | Mythos
| |
| The Tender of the 40' Yacht | Event (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| The Tenders of the Stones | Aug 2015 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Invictus)
| |
| Tenebrous Nightgaunt | Character (F) | Terror in Venice | CT61 | 2013 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tenement | 57-78 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic)
| |
| The Tenement | 54-57 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic)
| |
| Tenor of the Times | Support (C) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
 Tension | 02:00 |  Eternal Lies Suite | PELGT17 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Tentacular Spectacular | Event (P) | Eldritch Edition Promo | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tent-Pole NPCs | 36-42 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| Tent-Pole NPCs | 32-37 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| A Tenured Position | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Teodor Corvin | Character (F) | Words of Power | CT54 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Teratophobia | Event (F) | Scooby Doo Set 1 | | n/a | Self Published | Mythos
| |
| Terra Firma Fabulosus Once More | 49-56 | The Dreaming Stone | CHA2368 | 1997 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| Terra Occulta | 4-10 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now)
| |
| Terrible Beauty | Event (R) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Terrible Head | 12-13 | Minions | CHA2365 | 1997 | Chaosium | Call of Cthulhu (Classic)
| |
| The Terrible Old Bookshop | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Terrible Old Bookshop | 32 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Terrible Old Bookshop | 1990 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Terrible Old Man | Character (F) | Kingsport Dreams | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Terrible Old Man | Character (F) | Kingsport Dreams | CT13e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Terrible Old Man | Ally (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Terrible Old Man Promo | | Terrible Old Man Promo | | 2014 | Passport Game Studios | Kingsport Festival
| |
| A Terrible Thing to Do | Spell (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| The Terrifying House | Nov 2009 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Terrifying Visage | Support (F) | The Spawn of the Sleeper | CT19 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Terror | 01:59 | Eternal Lies Suite | PELGT17 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Terror | 5-28 | Terror | CHA0322 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| Terror at Erne Rock | | Chaosium Digest | v31n11 | Jun 2000 | Chaosium | Call of Cthulhu (Classic)
| |
| Terror at Erne Rock | 39-54 | Halloween Horror | CHA0326 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| Terror at the Top of the World | 27-44 | Age of Cthulhu Vol. V: Long Reach of Evil | 7005 | 2011 | Goodman Games | Call of Cthulhu (Classic)
| |
| Terror From the Deep | 2017 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Terror From the Museum | 21-38 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic)
| |
| The Terror in the Fog | 37-38 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Terror in the Fog | 1996 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Terror in the Gulf | Adventure (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Terror in the Swamp | 135-145 | Devil's Swamp | NCG-DS-HC-1 | 2018 | New Comet Games | Call of Cthulhu (Classic)
| |
| Terror in the Theatre | | Terror in the Theatre | | 2020 | Micro RPG | Terror in the Theatre
| |
| Terror Itself | | Terror Itself | | Dec 2017 | Chaosium | Call of Cthulhu (Classic)
| |
| The Terror of Monks Walk | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Terror of the Old Ones | 26 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Terror of the Tides | Character (F) | The Terror of the Tides | CT22 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Terror on the Arkham Express | 1 | Terror on the Arkham Express | | 2020 | Self Published | None
| |
| Terror on the Thames | C:5-44 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic)
| |
| The Terror out of Dunwich | Story (F) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Terror out of Dunwich | Story (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Terror out of Dunwich | Story (F) | Secrets of Arkham | CT32 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Terrorist Strike | Event (R) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Terrors in the Dark | Support (U) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Terrors in the Dark | Support (F) | Secrets of Arkham | CT32 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Test Facility 3188 | 1-13 | Test Facility 3188 | EX01 | 2007 | Self Published | Call of Cthulhu (Rising)
| |
| Test Resolution | 53-62 | Cthulhu Live | 0004 | 1999 | Fantasy Flight Games | Call of Cthulhu (Classic)
| |
| Test Resolution | 40-48 | Cthulhu Live | CHA6502 | 1997 | Chaosium | Call of Cthulhu (Classic)
| |
| Test Subjects | | Test Subjects | | Oct 2020 | Chaosium | Call of Cthulhu (Classic)
| |
| Testament | 48-49 | Ancient Enemies | WDF23100 | 2010 | WildFire Games | Framewerk (CthulhuTech)
| |
| The Testament of Fascination and Survival | 41 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Teufelhaus - Secret Volcano Base | | Delta Green Anomalies | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Thaasophobia | Event (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Thag Weed | Artifact (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Thanks Be to Shudde-M'ell | Event (R) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Thanks for the Memories | Adventure (F) | Eric Johnson Mythos Collection | | n/a | Self Published | Mythos
| |
| THAT DECEIT SHOULD STEAL SUCH GENTLE SHAPES | 2018 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| That Horrid Book | 10-11 | The Unspeakable Oath | 16/17 | Mar 2001 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| That Howling Frontier Part 1 | 46-53 | Protodimension | 14 | Win 2013 | Kinstaff Media | Call of Cthulhu (Classic)
| |
| That Howling Frontier Part 2 | 6-14 | Protodimension | 17 | Aut 2013 | Kinstaff Media | Call of Cthulhu (Classic)
| |
| That Old Fashioned Charm | Oct 2008 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| That Person | Oct 2019 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| That Terrible Old Forest House | 1 | One Thousand and One Nights and One Night | 26 | Mar 2008 | Self Published | Call of Cthulhu (WWI)
| |
| That Was Then, This is Now | 16-43 | CthulhuTech | WDF23000 | 2007 | WildFire Games | Framewerk (CthulhuTech)
| |
| That Which is Dead Shall Refuse to Lie | 7-19 | Red Eye of Azathoth | REAz | 2011 | Kobold Quarterly | Call of Cthulhu (Dark Ages)
| |
| That Which is Not | Event (R) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| That Which Truths Beneath | Oct 2019 | shoggoth.net | | n/a | Self Published | Paranoia
| |
| That Which Was Broken | 55-92 | The Curse of Nineveh | CB7355 | 2015 | Cubicle 7 | Call of Cthulhu (Classic)
| |
| Thaumaturgical Insight | Event (F) | The Mark of Madness | CT66 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thaumaturgical Prodigies in the New England Canaan | 13-17 | The Arkham Gazette | 1 | Nov 2013 | Sentinel Hill Press | Call of Cthulhu (Classic)
| |
| Thaumaturgical Prodigies in the New England Canaan | Tome (U) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Thaumaturgical Prodigies in the New-English Canaan | Tome (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Thaumaturgical Prodigies, Rev. Phillip’s Exposé | Support (C) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Theatre of Death | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Theatre of Death | 26-27 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Theatre of Death | 1990 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Theatre Style Live Roleplaying Events | | hyperwerx.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Them | Adventure (F) | Eric Johnson Mythos Collection | | n/a | Self Published | Mythos
| |
| Then Everything Went Black… | 37 | White Dwarf | 83 | Nov 1986 | Games Workshop | Call of Cthulhu (Classic)
| |
| Theology Professor | Character (C) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Theosophist | Character (F) | The Sleeper Below | CT63 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Theosophist Meeting | Event (R) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| There and Back Again | 2015 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| There are Unguarded Entrances to any Human Mind | 7-8 | The Black Sun | 2.2 | 1987 | Games Workshop | None
| |
| Theresa Genofrio | Ally (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| The Theron-Marks Society | Adventure (U) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| These Dread Pages | 4-23 | The Armitage Files | PELGT10 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| They Are From Away | | An Inner Darkness | GGP2001 | 2020 | Golden Goblin Press | Call of Cthulhu (Classic)
| |
| They Believe! | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| They Come at Night | Story (F) | Secrets of Arkham | CT32 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| They Did Not Think It Too Many | 102-123 | Strange Aeons II | CHA23117 | 2009 | Chaosium | Call of Cthulhu (Invictus)
| |
| They Sleep By Twilight | 42-59 | Worlds of Cthulhu | 5 | Jan 2007 | Pegasus Press | Call of Cthulhu (Classic)
| |
| They Wait in the Woods | 2017 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| They Who Wait | 30 | The Whisperer | 5 | Aut 2003 | Severn Valley Press | Call of Cthulhu (Classic)
| |
| They Wrote about Dreams | | House of Tindalos | | n/a | Self Published | Mythos
| |
| Thibet | 347-372 | Eternal Lies | PELGT34 | 2013 | Pelgrane Press | Trail of Cthulhu
| |
| Thicker Than Water | 186-188 | Cthulhu Apocalypse | PELGT40 | 2015 | Pelgrane Press | Trail of Cthulhu
| |
| Thief for Hire | Character (F) | Initiations of the Favored | CT42 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Thief of Souls | | Chaosium Digest | v24n06 | Mar 1998 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| Thieves in Your Attic | Event (C) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Thieves Like Us | 2000 | Gaming Outpost | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Thin Jack | 267-278 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Classic)
| |
| Thin Jack | 64-69 | Challenge | 70 | 1993 | Games Designers Workshop | Call of Cthulhu (Now)
| |
| Thin Jack | 38-47 | Opifex Bimonthly | 3 | 1996 | Self Published | Call of Cthulhu (Now)
| |
| Thin Jack | 1-12 | Thin Jack | | 1992 | Self Published | Call of Cthulhu (Now)
| |
| The Thing at the Gate | Story (F) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Thing at the Gate | Story (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Thing at the Gate | Story (F) | Secrets of Arkham | CT32 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Thing Behind You | Character (F) | The Path to Y'ha-nthlei | CT24 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Thing from Jakarta | 1-13 | The Thing from Jakarta | | 2002 | Self Published | Call of Cthulhu (Now)
| |
| The Thing from Jakarta, Part 1 | | Chaosium Digest | v36n09 | Oct 2002 | Chaosium | Call of Cthulhu (Now)
| |
| The Thing from Jakarta, Part 2 | | Chaosium Digest | v36n10 | Oct 2002 | Chaosium | Call of Cthulhu (Now)
| |
| Thing from Nightmare | Character (F) | Screams from Within | CT38 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Thing from the Shore | Character (F) | The Thing from the Shore | CT23 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thing from the Stars | Character (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thing from the Stars | Character (U) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Thing in Parcel 314 | 2007 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Thing in the Cave | Character (F) | Eldritch Edition Premium Starter Set | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Thing in the Darkness | 11-29 | Fantasy Gamer | 3 | Dec 1983 | Steve Jackson Games | Call of Cthulhu (Classic)
| |
| The Thing in the Darkness Keeper Notes | 32 | Fantasy Gamer | 4 | Feb 1984 | Steve Jackson Games | Call of Cthulhu (Classic)
| |
| The Thing in the Fog | Character (C) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Thing in the Mine | 52 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now)
| |
| The Thing in the Park | 316-334 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now)
| |
| The Thing in the Park | 1-19 | The Thing in the Park | | 1996 | Self Published | Call of Cthulhu (Now)
| |
| The Thing in the Pit | Sep 2020 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Thing in the Pool | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Thing in the Sugar Shack | 2020 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Thing in the Well | 34-38 | Curse of Cthulhu | CHA3306 | 1990 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thing in the Well | 54-59 | Day of the Beast | CHA2374 | 1998 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thing in the Well | 14-18 | The Fungi From Yuggoth | CHA2305 | 1984 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thing in the Yellow Mask | Character (F) | The Thousand Young | CT65 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Thing on the Doorstep | Adventure (F) | Eric Johnson Mythos Collection | | n/a | Self Published | Mythos
| |
| The Thing That Came from Kynarth! | Oct 2017 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Things in the Ground | Support (F) | Secrets of Arkham | CT32 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Things in the Water | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Things Just Got Stranger | 24-26 | Valkyrie | 2 | Oct 1994 | Partizan Press | Call of Cthulhu (Classic)
| |
| Things Lurking in the Darkness | 35-98 | Colonial Gothic: Lovecraft | RGG1699 | 2015 | Rogue Games | Colonial Gothic
| |
| Things Man Was Not Meant to Know | |  Ragnarok | 45 | 2005 | SFSFW | Chain Reaction
, Guns and Girls
| |
| Things That Go Bump in the Night | 31-34 | The Unspeakable Oath | 8/9 | Jun 1993 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Things That Were | 118-119 | Mortal Remains | WDF23002 | 2009 | WildFire Games | Framewerk (CthulhuTech)
| |
| Think of the Children | 86-105 | God Game Black | CB71207 | 2013 | Cubicle 7 | Call of Cthulhu (Laundry)
| |
| Think Tank | 53-73 | End of the World | 0005 | 1994 | Triad Entertainments | Call of Cthulhu (Now)
| |
| The Third Era | 151-172 | Once Men | CHA0356 | 2008 | Chaosium | Call of Cthulhu (Once Men)
| |
| The Third Man Factor * | 2016 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Third Order, Part One | | Chaosium Digest | v10n11 | Jun 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| The Third Order, Part Two | | Chaosium Digest | v10n12 | Jun 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| Third Time's the Charm | 208-228 | Goatswood and Less Pleasant Places | CHA2393 | 2001 | Chaosium | Call of Cthulhu (Now)
| |
| The Third-Man Factor | 55-58 | The Unspeakable Oath | 25 | Jul 2018 | Pagan Publishing | Delta Green
| |
| The Thirsting Tide | Feb-2021 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Thirteen | 13-16 | The Unspeakable Oath | 13 | Jan 1996 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Thirteen Men | | Serendipity's Circle | 13 | Win 1997 | Self Published | Call of Cthulhu (Classic)
| |
| The Thirteenth Convict | | The Thirteenth Convict | cr3005m | 2018 | Cthulhu Reborn | Call of Cthulhu (Convicts)
| |
| The Thirteenth Man | | Nightscapes | 13 | May 2000 | Self Published | Call of Cthulhu (Classic)
| |
| The Thirteenth Man, Part 1 | | Chaosium Digest | v30n06 | Feb 2000 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thirteenth Man, Part 2 | | Chaosium Digest | v30n07 | Feb 2000 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thirteenth Olympian | 91-100 | Worlds of Cthulhu | 3 | Jun 2005 | Pegasus Press | Call of Cthulhu (Now)
| |
| The Thirties | 158-189 | Trail of Cthulhu | PELGT01 | 2007 | Pelgrane Press | Trail of Cthulhu
| |
| Thirties London | 41-60 | Bookhounds of London | PELGT16 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Thirties-Something | 30-33 | The Unspeakable Oath | 7 | Jan 1993 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| thirtiessomething: Roleplaying CoC in the 1930s | 46-49 | The Last Province | 2 | Dec 1992 | Last Province Publishing | Call of Cthulhu (Classic)
| |
| Thirty-Five Abominable Adulations of the Bloated One | Spell (R) | Cthulhu Rising | CAO1302-1 | 1996 | Chaosium | Mythos
| |
| This Fecund Planet | 150-153 | APOCTHULHU | cr6100 | 2020 | Cthulhu Reborn | d100 (APOCTHULHU)
| |
| This Fire Shall Kill | 42-62 | The Stars Are Right! | CHA23100 | 2004 | Chaosium | Call of Cthulhu (Now)
| |
| This Fire Shall Kill | 35-53 | The Stars Are Right! | CHA2337 | 1992 | Chaosium | Call of Cthulhu (Classic)
| |
| This is the Future | Mar 2018 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Strange Aeons: 1979)
| |
| This is the Malt… | | Serendipity's Circle | 18 | n/a | Self Published | Call of Cthulhu (Classic)
| |
| This is What You Want… | 282 | CthulhuTech | WDF23000 | 2007 | WildFire Games | Framewerk (CthulhuTech)
| |
| This Old House | Aug 2008 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| This Old Tomb | | hyperwerx.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| This Silent World | 147-149 | APOCTHULHU | cr6100 | 2020 | Cthulhu Reborn | d100 (APOCTHULHU)
| |
| This Village was Made for Us | 6-35 | Atomic-Age Cthulhu | CHA23122 | 2013 | Chaosium | Call of Cthulhu (Atomic)
| |
| Thomas Bannano | Character (F) | Perilous Trials | CT41 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thomas F. Malone | Character (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thomas F. Malone | Ally (C) | Legends of the Necronomicon | CAO1303-1 | 1996 | Chaosium | Mythos
| |
| Thomas F. Malone, Haunted Police Detective | Character (U) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Thomas Fleming | Character (F) | Ebla Restored | CT55 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thomas Hughes | 1998 | delta-green.com | | n/a | Pagan Publishing | Call of Cthulhu (Delta Green)
| |
| Thomas Olney | Character (F) | Kingsport Dreams | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Thomas Olney | Character (F) | Kingsport Dreams | CT13e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thompson's Bridge | C:1-10 | Grimrock Isle | 0002 | Aug 1992 | Triad Entertainments | Call of Cthulhu (Classic)
| |
| Thon and Thal | Location (F) | Ends of the Earth | | n/a | Self Published | Mythos
| |
| A Thorough Investigation | Adventure (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Thorough Search | Event (F) | Curse of the Jade Emperor | CT48 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thor's Anvil | 89-108 | Nocturnum: Hollow Winds | CC02 | 1998 | Fantasy Flight Games | Call of Cthulhu (Now)
| |
| Thorston, The Shunned Town On The Dee | | Thorston, The Shunned Town on the Dee | FXC-06 | 2019 | Stygian Fox | Call of Cthulhu (Gaslight)
| |
| Those Nightmare Wings | | Chaosium Digest | v05n10 | Feb 1994 | Chaosium | Call of Cthulhu (Classic)
, Space 1889
| |
| Those Nightmare Wings | 19 | The Transactions of the Royal Martian Geographical Society | 4 | 1992 | Self Published | Call of Cthulhu (Gaslight)
, Space 1889
| |
| Those Nosy Kids! (Arkham) | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Those Nosy Kids! (innsmouth) | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Those Nosy Kids! (Middle East) | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Those Nosy Kids! (New Aeons) | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Those Nosy Kids! (Providence) | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Those Poor Souls Who Dwell in Light | C:46-66 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic)
| |
| Those Who Hunt the Hunter | 282 | CthulhuTech | WDF23000 | 2007 | WildFire Games | Framewerk (CthulhuTech)
| |
| Those Who Stray | 12-27 | Dark Passions | WDF23200 | 2008 | WildFire Games | Framewerk (CthulhuTech)
| |
| Those Within | | Those Within | | 2018 | Chaosium | Call of Cthulhu (Gaslight)
| |
| Those Without Faces | Character (F) | The Spawn of the Sleeper | CT19 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thoth's Dagger | 105-120 | Cthulhu Casebook | CHA3305 | 1990 | Chaosium | Call of Cthulhu (Classic)
| |
| Thoth's Dagger | 51-67 | Curse of the Chthonians | CHA2306 | 1984 | Chaosium | Call of Cthulhu (Classic)
| |
| Thoth's Dagger | 91-117 | Curse of the Chthonians | CHA23121 | 2011 | Chaosium | Call of Cthulhu (Classic)
| |
| Thoth's Dagger | 23-34 | Different Worlds | 27 | Mar 1983 | Chaosium | Call of Cthulhu (Classic)
| |
| The Thousand | Character (F) | The Mark of Madness | CT66 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| A Thousand Miles | 144-157 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic)
| |
| A Thousand Shapes of Horror | | A Thousand Shapes of Horror | AHC40 | 2019 | Fantasy Flight Games | Arkham Horror: The Card Game
| |
| The Thousand-Faced Moon, Hecate the Blessed | Character (U) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Thracian Gold | 135-185 | Shadows of War | CHA0349 | 2008 | Chaosium | Call of Cthulhu (WWII)
| |
| Thrall of Cthulhu | Support (C) | Unspeakable Tales | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Threads of Fate | | Threads of Fate | AHC20 | 2018 | Fantasy Flight Games | Arkham Horror: The Card Game
| |
| Threats | 227-232 | The Laundry | CB71200 | 2010 | Cubicle 7 | Call of Cthulhu (Laundry)
| |
| Three Babies and a Shoggoth | 58-68 | Protodimension | 13 | Aut 2012 | Kinstaff Media | Call of Cthulhu (d20)
| |
| The Three Bells | Support (F) | The Unspeakable Pages | CT57 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Three Days of Peace, Music, and Tentacle Love | 145-163 | Strange Aeons II | CHA23117 | 2009 | Chaosium | Call of Cthulhu (Strange Aeons: 1969)
| |
| Three Great Old Ones | Dec 2001 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Now)
| |
| Three Kings | 3-23 | Zero Point, Part 1 - Three Kings | MPS01011C | 2012 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
| |
| Three Kings | 25-45 | Zero Point, Part 1 - Three Kings | MPS01011P | 2012 | Modiphius Entertainment | PDQ
| |
| The Three Listeners | Character (F) | Never Night | CT50 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Three Maidens of Bingen | 84-101 | Horror Stories From the Red Room | CHA0413 | 2013 | Chaosium | Call of Cthulhu (Invictus)
| |
| Three Point Landing | 2007 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Three-Region Deck | | Thastygliax's Vault | | n/a | Self Published | Mythos
| |
| Thrice Blessed Mohammedan Steel | 2001 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Thrill Killer | Character (C) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Throne of the Black Pharaoh | Story (F) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Throne of the Black Pharaoh | Story (F) | Eldritch Edition Premium Starter Set | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Throth's Stalwart | Spell (R) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Through Good Times and Bad: Politics and Law | 13-30 | Kingdom of the Blind | CHA0359 | 2008 | Chaosium | Call of Cthulhu (Classic)
| |
| Through the Darkness of Futures Past | 2007 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Through the Gate of Deeper Slumber | 8-16 | H.P. Lovecraft's Dreamlands | CHA2394 | 2004 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| Through the Gates | Story (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Through the Waters, Darkly | 138-140 | Lovecraftesque | | 2016 | Black Armada | Lovecraftesque
| |
| Thrown Voices | | Thrown Voices | | Jul 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| Thrushmoor | 62-67 | The Thrushmoor Terror | PZO90110 | 2016 | Paizo Publishing | Pathfinder
| |
| The Thrushmoor Terror | 4-55 | The Thrushmoor Terror | PZO90110 | 2016 | Paizo Publishing | Pathfinder
| |
| Thule Zealot | Character (F) | The Thousand Young | CT65 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thunder Five | 35 | Protodimension | 20 | Sum 2014 | Kinstaff Media | Call of Cthulhu (Now)
, Dark Conspiracy
| |
| Thunder in the Blood | 27-52 | End of the World | 0005 | 1994 | Triad Entertainments | Call of Cthulhu (Classic)
| |
| Thunder in The East | Event (F) | Kingsport Dreams | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Thunder in The East | Event (F) | Kingsport Dreams | CT13e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Thurston's Tavern | Location (C) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Tiara Of Opulent Fantasy | Artifact (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Tibet | 04:02 | Eternal Lies Suite | PELGT17 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Tibetan Gods and Monsters | 54-64 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic)
| |
| Tibetan History and Culture | 6-25 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic)
| |
| The Tibetan Interior | 135-151 | Spawn of Azathoth | CHA23101 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| Tibetan Miscellany | 57-69 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic)
| |
| Tibetan Religion | 26-53 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic)
| |
| Tickets Please | | Tickets Please | | Jan 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| Tidal Pool | Support (F) | The Sleeper Below | CT63 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tides of Doom | 2007 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Tides of Madness | | Tides of Madness | | 2016 | Portal Games | Tides of Madness
| |
| Ties That Bind | 76-95 | Doors to Darkness | CHA23148 | 2015 | Chaosium | Call of Cthulhu (Classic)
| |
| Tiger Transit | 140-169 | Delta Green Countdown | PAG1008 | 1999 | Pagan Publishing | Call of Cthulhu (Delta Green)
| |
| Tihuanaco | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic)
| |
| The Tikbalang, Horse demon of the Philippines | Oct 2019 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| A Tiki Scare is No Fair | Adventure (F) | Scooby Doo Adventures | | n/a | Self Published | Mythos
| |
| Til Death Do Us Part | | Til Death Do Us Part | MAD04 | 2011 | Fantasy Flight Games | Mansions of Madness
| |
| Tilik-Ouk-Kook | Ally (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Till a' The Seas | 8-13 | APOCTHULHU | cr6100 | 2020 | Cthulhu Reborn | None
| |
| The Tillinghast Lamp | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Time After Time | 182-205 | Strange Aeons II | CHA23117 | 2009 | Chaosium | Call of Cthulhu (Strange Aeons: 2637)
| |
| Time and the Serpent | 78-90 | Dwellers in Shadow | 0004 | Jul 1996 | Triad Entertainments | Call of Cthulhu (Classic)
| |
| Time Bomb | Event (U) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Time Flux | Event (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| A Time For Decisions | 145-163 | Walker in the Wastes | PAG1002 | 1994 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Time for Discretion | Support (R) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Time is Nigh | Event (R) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Time Machine | Artifact (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Time Machine | Artifact (F) | Scooby Doo Set 2 | | Mar 1999 | Self Published | Mythos
| |
| Time Machine Deck | | Thastygliax's Vault | | n/a | Self Published | Mythos
| |
| A Time of Darkness | 51-72 | Cthulhu Live: Shades of Gray | 0008 | 2000 | Fantasy Flight Games | Call of Cthulhu (Classic)
| |
| Time of Prophecy | Event (U) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Time of the Serpent | | Time of the Serpent | | Sep 2020 | Chaosium | Call of Cthulhu (Classic)
| |
| Time Rescue | | A Cold Fire Within | CHA23162 | 2019 | Chaosium | Call of Cthulhu (Classic)
| |
| A Time to Celebrate, A Time to Die | 54 | Dark Passions | WDF23200 | 2008 | WildFire Games | Framewerk (CthulhuTech)
| |
| A Time to Reap | Event (C) | Unspeakable Tales | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| A Time to Sow | Event (R) | Unspeakable Tales | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Time Travel | A:40-49 |  Cthulhu by Gaslight | CHA2314-X | 1986 | Chaosium | Call of Cthulhu (Classic)
| |
| Time Travel | 53-64 | Cthulhu by Gaslight | CHA3303 | 1988 | Chaosium | Call of Cthulhu (Classic)
| |
| Time Voyager | Adventure (F) | Eric Johnson Mythos Collection | | n/a | Self Published | Mythos
| |
| Time Wolf (Document #8321) | 1999 | delta-green.com | | n/a | Pagan Publishing | Call of Cthulhu (Delta Green)
| |
| Time-Frozen | Oct 2020 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Timeless Sands of India | 2-32 | Age of Cthulhu Vol. VII: The Timeless Sands of India | 7007 | 2012 | Goodman Games | Call of Cthulhu (Classic)
| |
| Time-Life Building | Location (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Timeline | 125-128 | Colonial Gothic: Lovecraft | RGG1699 | 2015 | Rogue Games | Colonial Gothic
| |
| Timeline | 5-15 | Cthulhu Rising | CHA0311 | 2005 | Chaosium | Call of Cthulhu (Rising)
| |
| Timeline | 62-63 | The Mysteries of Mesoamerica | PAG1012 | 2009 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Timeline for 1925/26 | 692-702 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| Timeline for 1925/26 | 556-563 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| A Timeline for Britain and Europe 2918-1939 | 26-27 | Green and Pleasant Land | CHA2320 | 1987 | Chaosium | Call of Cthulhu (Classic)
| |
| Timeline for the 1920s | C:2-4 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic)
| |
| Timeline for the 1920s | B:2-4 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic)
| |
| Timeline for the 1920s | 96-98 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic)
| |
| Timeline of British East Africa | 215-218 | Secrets of Kenya | CHA23109 | 2007 | Chaosium | Call of Cthulhu (Classic)
| |
| Timeline of Sudan | 13-20 | Mysteries of Sudan | CHA0362 | 2009 | Chaosium | Call of Cthulhu (Gaslight)
| |
| A Timeline of the Golden Dawn | 25-27 | The Golden Dawn | PAG1004 | 1996 | Pagan Publishing | Call of Cthulhu (Gaslight)
| |
| Timelines | 321-327 | Secrets of Japan | CHA2392 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| Timely Intervention | Event (F) | Into Tartarus | CT51 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Time-Tangled | Oct 2020 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tindalos Alpha | Character (F) | The Unspeakable Pages | CT57 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tinleg Munk and Error 'Fingers' Bonadi | | Chaosium Digest | v32n07 | Oct 2000 | Chaosium | Call of Cthulhu (Now)
| |
| Tinned Food | Artifact (F) | Antarctica | | n/a | Self Published | Mythos
| |
| Tinsdown West | 87-90 | The Black Seal | 3 | Nov 2003 | Brichester University Press | Call of Cthulhu (Now)
| |
| Tips for Players | 61-62 | The Apocalypse Machine | PELGT24 | 2011 | Pelgrane Press | Trail of Cthulhu
| |
| Tips for Players | 62-63 | Cthulhu Apocalypse | PELGT40 | 2015 | Pelgrane Press | Trail of Cthulhu
| |
| Tips, Skills, and Professions for Horror Games | 19 | Space Gamer | 76 | Sep 1985 | Steve Jackson Games | Call of Cthulhu (Classic)
| |
| The Titan Incident | | The Titan Incident | | Dec 2018 | Chaosium | Call of Cthulhu (Strange Aeons: 2189)
| |
| Titanic | Event (R) | Expeditions of Miskatonic University | CAO1301-1 | 1996 | Chaosium | Mythos
| |
| Tithe Collector | Character (F) | The Horror Beneath the Surface | CT20 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| T-Men | Character (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| T-Men | Character (C) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| To All the Shapes at Sea | 49 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| To Awaken What Never Sleeps | 9-20 | Tales of the Sleepless City | MRP0011 | 2013 | Miskatonic River Press | Call of Cthulhu (Classic)
| |
| To Believe | 56-64 | Adventures Unlimited | 3 | Aut 1995 | Bootstrap Press | Call of Cthulhu (Now)
, Kult
| |
| To Do What We Must | 86-87 | Shadis | 22 | Dec 1995 | Alderac Entertainment Group | None
| |
| To Drakmar | 158-171 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic)
| |
| To Eternity | | To Eternity | | 2021 | Adreama Games | Machina Arcana
| |
| To Hell or Connaught | 77-101 | Strange Aeons II | CHA23117 | 2009 | Chaosium | Call of Cthulhu (Strange Aeons: 1649)
| |
| To Kill A Lie: 2nd Gig | 7-21 | To Kill a Lie: 2nd Gig | | 2009 | Self Published | Framewerk (CthulhuTech)
| |
| To See Another Day | (R) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| To See Another Day | Support (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| To Serve Man: Recipies in Anthropophagy for Call of Cthulhu | 15-? | Polyhedron | 133 | Dec 1998 | TSR | Call of Cthulhu (Classic)
| |
| To Sleep, Perchance to Dream | B:5-6 | H.P. Lovecraft's Dreamlands | CHA2315-X | 1986 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| To Sleep, Perchance to Dream | 157-158 | H.P. Lovecraft's Dreamlands | CHA2394 | 2004 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| To Sleep, Perchance to Dream | 44-45 | H.P. Lovecraft's Dreamlands | CHA3302 | 1988 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| To the Dark Tower | 197-234 | Beyond the Mountains of Madness | CHA2380 | 1999 | Chaosium | Call of Cthulhu (Classic)
| |
| To the Dust Returned | 29-40 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic)
| |
| To The Future | | Chaosium Digest | v27n06 | Jan 1999 | Chaosium | Call of Cthulhu (Classic)
| |
| To the Future | 1999 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| To the Last Breath | Event (R) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| To the Tune of "Greensleeves" | 2018 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| To Wake, Perchance to Dream | 102-105 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| To Walk on the Earth in Carcosa | 79-100 | Tatters of the King | CHA23104 | 2006 | Chaosium | Call of Cthulhu (Classic)
| |
| The Toast of London | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Toast of London | 30 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Toast of London | 1990 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Today's Tabloid Headlines | Adventure (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Today's Tabloid Talk Shows | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Toil in the Fields | 23-40 | Tales of the Caribbean | GGP1603 | 2016 | Golden Goblin Press | Call of Cthulhu (Classic)
| |
| Toiletries, Luxuries and Vices | 81-83 | The Gaslight Equipment Catalogue | CHA0319 | 2005 | Chaosium | Call of Cthulhu (Gaslight)
| |
| The Toll of Madness | 10-12 | Protodimension | 18 | Win 2014 | Kinstaff Media | Call of Cthulhu (Classic)
| |
| Tom O'Bedlam | Character (F) | The Mark of Madness | CT66 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tomb | 124-169 | Cthulhu Dark Ages | CHA2398 | 2004 | Chaosium | Call of Cthulhu (Dark Ages)
| |
| Tomb of Ash | 554-567 | 40 Adventures for Call of Cthulhu | | 2002 | Self Published | Call of Cthulhu (Now)
| |
| Tomb of Ash | 21-31 | Raising Up | CHA0089 | 2004 | Chaosium | Call of Cthulhu (Now)
| |
| Tomb of Ash | 1-14 | Tomb of Ash | | 2002 | Self Published | Call of Cthulhu (Now)
| |
| Tomb of Nyarlathotep | 1-11 | Tomb of Nyarlathotep | | 2015 | Self Published | Dungeons and Dragons
| |
| The Tomb of Set | 1998 | Ubar | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tomb of the Prophet Daniel | Location (R) | Legends of the Necronomicon | CAO1303-1 | 1996 | Chaosium | Mythos
| |
| The Tomb of the Winds | 74-79 | What Grows Within | PZO90113 | 2016 | Paizo Publishing | Pathfinder
| |
| Tomb of Turases III | 56-57 | Shadis | 17 | Jan 1995 | Alderac Entertainment Group | None
| |
| Tomb Raider | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Tomb-Herd | Character (R) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tomb-Hounds of Egypt | | Ken Writes About Stuff | v2n12 | Feb 2015 | Pelgrane Press | Trail of Cthulhu
| |
| The Tombola Cipher | 53-57 | The Black Seal | 1 | Nov 2001 | Brichester University Press | Call of Cthulhu (Now)
| |
| Tombs of Europe and the Nile | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Tomequest | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Tomes and Magic | 73-78 | The Armitage Files | PELGT10 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Tomes and Spells | | Tomes and Spells | | 2018 | Sixpence Games | Cultists of Cthulhu
| |
| Tomes of Blasphemous Knowledge | 1-5 | Tomes of Blasphemous Knowledge | | 2013 | Cakebread and Walton | Clockwork and Chivalry
, Renaissance (Dark Streets)
| |
| Tomes of Cthulhu | | Tomes of Cthulhu | AGT0064 | 2016 | Azukail Games | Call of Cthulhu (Classic)
| |
| Tomes of Eldritch Lore | 224-238 | Keeper Rulebook | CHA23135 | 2015 | Chaosium | Call of Cthulhu (Classic)
| |
| Tomes of Terror, and Apocalyptic Revelations | 110-119 | APOCTHULHU | cr6100 | 2020 | Cthulhu Reborn | d100 (APOCTHULHU)
| |
| Tomes of the Mythos | 30-34 | The Cthulhu Mythos of H P Lovecraft | | 2006 | Self Published | Unisystem
| |
| Tommy Gun | Support (F) | For the Greater Good | CT64 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tommy Malloy | Character (F) | Denizens of the Underworld | CT62 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tommygun | Support (C) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tommygun | Artifact (C) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Tonga | 6-31 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic)
| |
| The Tongs of America | 16-19 | Different Worlds | 43 | Jul 1986 | Chaosium | Call of Cthulhu (Classic)
| |
| Tongued by Fire | 122-143 | Mythos Expeditions | PELGT37 | 2014 | Pelgrane Press | Trail of Cthulhu
| |
| Too Close to Home | | Too Close to Home | | Aug 2019 | Chaosium | Call of Cthulhu (Now)
| |
| Too Far Gone | 4-5 | Dark Passions | WDF23200 | 2008 | WildFire Games | Framewerk (CthulhuTech)
| |
| Too Many Masks | 24-25 | The Unspeakable Oath | 12 | Jun 1995 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Too Many Murderers * | 80 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| Toodee-6 | Ally (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Tools | 84-92 | The Gaslight Equipment Catalogue | CHA0319 | 2005 | Chaosium | Call of Cthulhu (Gaslight)
| |
| The Tools of the Bloody Tongue | 122-123 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| The Tools of the Bloody Tongue | 111-112 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| The Tools of the Trade | 69-114 | The 1920s Investigator's Companion | CHA2370 | 1997 | Chaosium | Call of Cthulhu (Classic)
| |
| The Tools of the Trade | 115-130 | Investigator's Guide to the Secret War | MPS01031CS | 2013 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Savage Worlds (Achtung!)
| |
| Tools of the Trade | 91-103 | The Laundry | CB71200 | 2010 | Cubicle 7 | Call of Cthulhu (Laundry)
| |
| Tools of the Trade | 44-71 | Unveiled Threats | WDF23600 | 2011 | WildFire Games | Framewerk (CthulhuTech)
| |
| Top of the World | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Torch the Joint | Support (F) | Spawn of Madness | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Torch the Joint | Support (F) | Spawn of Madness | CT12e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Torch the Joint! | Event (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tormiss CRD, Model Z-17 | 123-127 | Fear's Sharp Little Needles | 3005 | 2018 | Stygian Fox | Call of Cthulhu (Now)
| |
| Torrent of Rebellion | | Torrent of Rebellion | | 2020 | Grimlord Games | The Everrain
| |
| Torrential Rains | Event (F) | Seattle | | n/a | Self Published | Mythos
| |
| Total Eclipse | Event (F) | The Terror of the Tides | CT22 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tothurh | 153-175 | Cthulhu Dark Ages | CHA23143 | 2015 | Chaosium | Call of Cthulhu (Dark Ages)
| |
| Touch Me Not | Apr 2018 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Touched by the Faries | 65-69 | The Arkham Gazette | 3 | Oct 2015 | Sentinel Hill Press | Call of Cthulhu (Classic)
| |
| Touched by the Sleeper | Event (U) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Touched by the Sleeper | Event (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Touched with Madness | Event (F) | The Spawn of the Sleeper | CT19 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tough Choices | 4-9 | Ancient Enemies | WDF23100 | 2010 | WildFire Games | Framewerk (CthulhuTech)
| |
| Tough Gains | 1-5 | Tough Gains | | 2008 | Self Published | Yellow Dawn
| |
| A Tour of the World of Queensguard | 14-24 | Queensguard | CHA0382 | 2009 | Chaosium | Call of Cthulhu (Steampunk)
| |
| Touring Cycle | Support (U) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tourist Trap | | Serendipity's Circle | 15 | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Tower | 2007 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Tower | | The Tower | | 2006 | Self Published | Call of Cthulhu (Dark Ages)
| |
| The Tower in Darkness | 74-79 | Dreams of the Yellow King | PZO90111 | 2016 | Paizo Publishing | Pathfinder
| |
| Tower of Koth | Location (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| The Tower of Koth | Support (F) | Journey to Unknown Kadath | CT31 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tower of Madness | | Tower of Madness | | 2018 | Smirk and Dagger Games | Tower of Madness
| |
| Towers of Am'harb | | Towers of Am'harb | | 2019 | Moaideas Game Design | Towers of Am'harb
| |
| Towers of Eibon | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| A Town History | 4-10 | Kingsport: The City in the Mists | CHA2333 | 1991 | Chaosium | Call of Cthulhu (Classic)
| |
| A Town of Discontent | 1998 | Ubar | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Town of Kirkbridges | | The Town of Kirkbridges | | Apr 2020 | Chaosium | Call of Cthulhu (Now)
| |
| The Town of Tontine | 13-24 | Serendipity's Circle | 2 | Mar 1995 | Self Published | Bloodshadows
, Call of Cthulhu (Classic)
, Dark Conspiracy
, The Whispering Vault
| |
| Townsfolk Riot | Event (U) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Toy Soldiers | Oct 2018 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Now)
| |
| Toys | Support (U) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Tractate | 60-69 | Children of the Storm | CHA0394 | 2010 | Chaosium | Call of Cthulhu (Classic)
| |
| Trade Character Sheets Promo Card | | Trade Character Sheets Promo Card | | Apr 2008 | Steve Jackson Games | Munchkin
| |
| Tradecraft | 4-18 | Agent's Handbook | CB71203 | 2011 | Cubicle 7 | Call of Cthulhu (Laundry)
| |
| Traffic Stop | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Tragic Celebrity | Character (F) | Conspiracies of Chaos | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tragic Celebrity | Character (F) | Conspiracies of Chaos | CT14e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Trail of Cthulhu Theme (Pulp) | 01:00 | Four Shadows | PELGT05 | 2008 | Pelgrane Press | Trail of Cthulhu
| |
| Trail of Cthulhu Theme (Purist) | 01:02 | Four Shadows | PELGT05 | 2008 | Pelgrane Press | Trail of Cthulhu
| |
| A Trail of Frost and Blood | 124-177 | Assault on the Mountains of Madness | MUH050029 | 2013 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Savage Worlds (Achtung!)
| |
| Trail of the Golden Spike | 3-27 | Trail of the Golden Spike | Hero 14 | 1984 | Hero Games | Call of Cthulhu (Classic)
, Daredevils
, Justice Inc
, Mercenaries, Spies and Private Eyes
| |
| Trail of the Loathsome Slime | 2-15 | Trail of the Loathsome Slime | MM1 | 1985 | Games Workshop | Call of Cthulhu (Classic)
| |
| Trail of the Loathsome Slime | 10-11 | White Dwarf | 43 | Jul 1983 | Games Workshop | Call of Cthulhu (Now)
| |
| Trail of the Monolith | | Trail of the Monolith | | Dec 2017 | Chaosium | Call of Cthulhu (Classic)
| |
| Trail of the Mummy | Jun 2016 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Trail of Tsathoggua | 4-29 | The Compact Trail of Tsathoggua | CHA2362 | 1997 | Chaosium | Call of Cthulhu (Classic)
| |
| The Trail of Tsathoggua | 4-21 | The Trail of Tsathoggua | CHA2308 | 1984 | Chaosium | Call of Cthulhu (Classic)
| |
| Trail of Yig | 99-109 | Tales of the Miskatonic Valley | CHA2334 | 1991 | Chaosium | Call of Cthulhu (Classic)
| |
| The Trail of Ysgar | | Chaosium Digest | v29n11 | Dec 1999 | Chaosium | Call of Cthulhu (Dreamlands)
| |
| Train | Event (C) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Train | Event (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Train | Event (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Train 198 to Churchill, Manitoba | 2010 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Train Doesn't Stop Here Anymore | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Train Station | Support (R) | Unspeakable Tales | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Training Courses | 66-76 | Agent's Handbook | CB71203 | 2011 | Cubicle 7 | Call of Cthulhu (Laundry)
| |
| Training Day | 2018 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Training's Over | 34-37 | Chthonian Stars | WDF25020 | 2011 | WildFire Games | Traveller (Chthonian Stars)
| |
| Tramp Steamer | Event (C) | Cthulhu Rising | CAO1302-1 | 1996 | Chaosium | Mythos
| |
| Trampling Dark Young | Character (F) | Initiations of the Favored | CT42 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tramps and Beggars | | Dagon | 6 | Mar 1985 | Self Published | Call of Cthulhu (Classic)
| |
| Transatlantic Terror | 2-9 | Age of Cthulhu: Transatlantic Terror | 7000 | 2014 | Goodman Games | Call of Cthulhu (Classic)
| |
| Transdimensional Cannibal Cyberdemons on Virtual Weed | | People of Innsmouth | 13 | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Transference | 20-24 | Interface | 6 | 1992 | Prometheus Publishing | Call of Cthulhu (Cyberpunk)
| |
| Transference | | Serendipity's Circle | 14 | Spr 1998 | Self Published | Call of Cthulhu (Classic)
| |
| The Transformation | Adventure (F) | Eric Johnson Mythos Collection | | n/a | Self Published | Mythos
| |
| Transgression | 159-165 | Secrets of New York | CHA23103 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| The Transition of Ludvig Prinn | 1-2 | The Transition of Ludvig Prinn | | 2015 | Self Published | Trail of Cthulhu
| |
| The Transmigration of the Emerald Lama | | The Transmigration of the Emerald Lama | | May 2020 | Chaosium | Call of Cthulhu (Now)
| |
| Transport | 214-215 | Call of Cthulhu | CHA2336 | 1992 | Chaosium | Call of Cthulhu (Classic)
| |
| Transport | 58-59 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic)
| |
| Transport | 26-30 | Mysteries of Ireland | CHA0408 | 2012 | Chaosium | Call of Cthulhu (Classic)
| |
| Transport & Travel | 28-44 | 1920s Investigator's Companion Vol. I | CHA2343 | 1993 | Chaosium | Call of Cthulhu (Classic)
| |
| Transportation | 93-105 | The Gaslight Equipment Catalogue | CHA0319 | 2005 | Chaosium | Call of Cthulhu (Gaslight)
| |
| Trapped in the Labyrinth | Event (U) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Trapped in the Labyrinth | Event (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Trapped in the Labyrinth | Event (F) | Arkham Edition Premium Starter Set | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Travel | C:18-19 | Call of Cthulhu | CHA2009-X | 1981 | Chaosium | Call of Cthulhu (Classic)
| |
| Travel | B:18-19 | Call of Cthulhu | CHA2301-X | 1983 | Chaosium | Call of Cthulhu (Classic)
| |
| Travel | 109-110 | Call of Cthulhu | CHA2317-H | 1986 | Chaosium | Call of Cthulhu (Classic)
| |
| Travel | 49-52 | Mysteries of Sudan | CHA0362 | 2009 | Chaosium | Call of Cthulhu (Gaslight)
| |
| Travel by Library | | Chaosium Digest | v21n04 | Aug 1997 | Chaosium | Mythos
| |
| Travel By Sea | 47-57 | The Sense of the Sleight of Hand Man | APU8001 | 2013 | Arc Dream Publishing | Call of Cthulhu (Dreamlands)
| |
| Travel Papers | 26-31 | Shadis | 18 | Mar 1995 | Alderac Entertainment Group | None
| |
| The Travelers' Tale | Apr 2018 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Now)
| |
| Traveling: Land, Sea and Air | 284-287 | Call of Cthulhu | CHA23106 | 2005 | Chaosium | Call of Cthulhu (Classic)
| |
| Traveling: Land, Sea and Air | 250-253 | Call of Cthulhu | CHA2386 | 1999 | Chaosium | Call of Cthulhu (Classic)
| |
| Traveller of Aeons | Yithian (Y) | Yithian Deck | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Travelling 1 | 00:33 | Eternal Lies Suite | PELGT17 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Travelling 2 | 00:33 | Eternal Lies Suite | PELGT17 | 2010 | Pelgrane Press | Trail of Cthulhu
| |
| Travelling Armed | A:33-35 | Horror on the Orient Express | CHA23130 | 2014 | Chaosium | Call of Cthulhu (Classic)
| |
| Travelling in Tibet | 48-57 | Mysteries of Tibet | CHA0351 | 2008 | Chaosium | Call of Cthulhu (Classic)
| |
| Travelling to Tibet | 84-92 | Secrets of Tibet | CHA23129 | 2013 | Chaosium | Call of Cthulhu (Classic)
| |
| The Travesty | | Courting Madness | 3 | 1992 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Travesty | 2-9 | Of Keys and Gates | PAG2101 | 1995 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Travesty | 20-31 | Out of the Vault | PAG1009 | 2002 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| The Travesty | 41-50 | The Unspeakable Oath | 3 | Aug 1991 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Treasure for the Watcher | | Treasure for the Watcher | | Sep 2021 | Chaosium | Call of Cthulhu (Wild West)
| |
| Treasure Hunt | 2016 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Treasure Hunt * | 101 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| The Treasure Hunt, Part 1 | | Chaosium Digest | v37n12 | Sep 2003 | Chaosium | Call of Cthulhu (Classic)
| |
| The Treasure Hunt, Part 2 | | Chaosium Digest | v38n01 | Sep 2003 | Chaosium | Call of Cthulhu (Classic)
| |
| Treasure Hunter | Character (C) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Treasure Island | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| Treasury Agent | Character (C) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tree of Sayede Mandura | Location (C) | Legends of the Necronomicon | CAO1303-1 | 1996 | Chaosium | Mythos
| |
| The Tree with White Fruit | 27-40 | The Pastores | CHA0313 | 2005 | Chaosium | Call of Cthulhu (Dark Ages)
| |
| The Trellborg Monstrosities | 3-35 | The Trellborg Monstrosities | MPS01021C | 2013 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
| |
| The Trembling Giant | 131-168 | Out of the Woods | PELGT43 | 2017 | Pelgrane Press | Trail of Cthulhu
| |
| Treme | Support (F) | The Thousand Young | CT65 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Trench Sisters | Ally (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| Trent Dixon | Character (F) | The Spawn of the Sleeper | CT19 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Trial By Fire | 49-50 | Protodimension | 1 | Sum 2009 | Kinstaff Media | Call of Cthulhu (Delta Green)
| |
| Trial Judge | Character (F) | The Gleaming Spiral | CT44 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Trials of Boozer | | Trials of Boozer | | Oct 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| A Triangle Chronology | 84-87 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now)
| |
| Tribal Dance | 52-? | Demonground | 10 | Aut 2000 | Self Published | Call of Cthulhu (Classic)
| |
| Tribal Dance | 1-17 | Tribal Dance | | n/a | Self Published | Call of Cthulhu (Now)
| |
| Tribal Elder | Character (U) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tribes of Sudan | 20-28 | Mysteries of Sudan | CHA0362 | 2009 | Chaosium | Call of Cthulhu (Gaslight)
| |
| Trick or Treat | 112-118 | Blood Brothers | CHA2329 | 1990 | Chaosium | Call of Cthulhu (Classic)
| |
| The Trickster's Feast | 94-109 | Spirits & Dreams of the Viking Age | CHA0390 | 2010 | Chaosium | Call of Cthulhu (Dark Ages)
| |
| Tricolorur Terror | | Tricolour Terror | cr3005b | 2016 | Cthulhu Reborn | Call of Cthulhu (Convicts)
| |
| Tri-Eye | Dec 2002 | Pyramid Volume 2 | | n/a | Steve Jackson Games | Call of Cthulhu (Delta Green)
| |
| Trigger-Happy Mercenary/Sardonic Serpentman | Investigator (C) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Triggerman | Character (F) | Call of Cthulhu The Card Game | CT18 | 2008 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Triggerman | Character (U) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Trilogy of Terror | 50-52 | White Dwarf | 97 | Jan 1988 | Games Workshop | Call of Cthulhu (Classic)
| |
| Trip to the Speakeasy | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| The Triptych of van Nacht | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Triskadekaphobia | Event (R) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| The Trismegistus Club | 1-14 | The Trismegistus Club | | 2010 | Miskatonic River Press | Call of Cthulhu (Gaslight)
| |
| The Triumvirate | 83-99 | The Big Book of Cults | CHA0316 | 2005 | Chaosium | Call of Cthulhu (Now)
| |
| Triune Mask | Support (C) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Troll Takes a Leap | Adventure (F) | House of Tindalos | | n/a | Self Published | Mythos
| |
| The Trollenberg Terror | 43-46 | Protodimension | 19 | Spr 2014 | Kinstaff Media | Call of Cthulhu (Now)
| |
| Trophy Room | Support (F) | Murmurs of Evil | CT35 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tropical Death | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Tropical Death | 18 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Tropical Death | 1990 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Trouble in Budapest | 26-28 | The Unspeakable Oath | 10 | Jan 1994 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Trouble in Pinewood | | Trouble in Pinewood | | Jul 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| Trouble in Threes - Spring | | Trouble in Threes - Spring | | May 2019 | Chaosium | Call of Cthulhu (Now)
| |
| Trouble in Threes - Summer | | Trouble in Threes - Summer | | Jul 2019 | Chaosium | Call of Cthulhu (Now)
| |
| Trouble on Knifecut Mesa | 37-62 | Shadows Over Stillwater | CHA23156 | 2019 | Chaosium | Call of Cthulhu (Wild West)
| |
| Trouble on the Tracks | 2007 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| True Crimes! | 64 | The London Guidebook | CHA2347 | 1996 | Chaosium | Call of Cthulhu (Classic)
| |
| True Deeptective | 2019 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The True History of Friedrich Wilhem Von Juntz | 106-111 | Worlds of Cthulhu | 4 | Jan 2006 | Pegasus Press | Call of Cthulhu (Classic)
| |
| True Magic | 2000 | wtimmins.tripod.com | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| True Magick | 567-570 | The Masks of Nyarlathotep Companion (Limited) | 60-MONC-08 | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| True Magick | 440-442 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| True Magick, Theophilus Wren's Taxonomy | Support (R) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tru'nembra | Character (F) | The Mark of Madness | CT66 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Trust No One - Especially Yourself (CTHULHU) | | Chaosium Digest | v29n03 | Dec 1999 | Chaosium | Call of Cthulhu (Classic)
| |
| Truth Extraction | Spell (F) | Rosemary's Baby | | n/a | Self Published | Mythos
| |
| The Truth Has Consequences | 2019 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| Truth or Consequences | Oct 2017 | Reckoning of the Dead | | n/a | Self Published | Call of Cthulhu (Now)
| |
| The Truth Shall Set You Free | 81-126 | Unseen Masters | CHA2384 | 2001 | Chaosium | Call of Cthulhu (Classic)
| |
| Trutz Blanke Hans | | Trutz Blanke Hans | | Aug 2021 | Chaosium | Call of Cthulhu (Classic)
| |
| Tsar Tsathoggua | | House of Tindalos | | n/a | Self Published | Mythos
| |
| Tsathoggua | Monster (R) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Tsathoggua, The Sleeper | Character (R) | Forgotten Cities | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| T-Site 2 | 2019 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| t'tka Halot | Support (F) | Written and Bound | CT53 | 2012 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tuchulcha | 90-92 | Ye Booke of Tentacles | 2 | 1999 | The Chaos Society | Call of Cthulhu (Classic)
| |
| Tukor | Ally (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Tulzscha | Monster (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Tulzscha, The Green Flame | Character (F) | Kingsport Dreams | | 2006 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tulzscha, The Green Flame | Character (F) | Kingsport Dreams | CT13e | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Tumult of the Bazaar - Indian Characters | 35-42 | Mysteries of the Raj | CHA0391 | 2010 | Chaosium | Call of Cthulhu (Gaslight)
| |
| Tundra, Taiga, and Steppe | 16-26 | Guide to the Eastern Front | MUH01053CS | 2014 | Modiphius Entertainment | Call of Cthulhu (Achtung!)
, Savage Worlds (Achtung!)
| |
| Tunnel Lurker | Character (F) | Never Night | CT50 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Tunnel of Ghouls | Location (F) | Ends of the Earth | | n/a | Self Published | Mythos
| |
| The Turbulent Mason | | The Turbulent Mason | cr3005n | 2018 | Cthulhu Reborn | Call of Cthulhu (Convicts)
| |
| Turf War | Event (F) | Denizens of the Underworld | CT62 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| The Turin Guidebook | 2000 | The Mana Bros | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Turkish Delight | | Tales of Terror (I) | | 1990 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Turkish Delight | 23-24 | Tales of Terror (III) | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Turkish Delight | 1990 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| A Turn for the Worse | Event (P) | Arkham Edition Promo | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| A Turn of Fate | | Tales of Terror (II) | PAG2102 | 1996 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Turn to Stone | 43-76 | The Seventhfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic)
| |
| Turn to Stone | 1-28 | Turn to Stone | | 2007 | Self Published | Call of Cthulhu (Classic)
| |
| Turnabout | 80-84 | Taint of Madness | CHA2354 | 1995 | Chaosium | Call of Cthulhu (Classic)
| |
| Turncoat * | 2020 | The Fairfield Project | | n/a | Self Published | Call of Cthulhu (Delta Green)
| |
| The Turning of the Wheel | 83-94 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now)
| |
| Turning the Silver Key | Event (R) | Forbidden Relics | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| The Turquoise Sea | 4-10 | The Bermuda Triangle | CHA2372 | 1998 | Chaosium | Call of Cthulhu (Now)
| |
| Turquoise Skyhawk | Ally (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| The Turquoise Temple of Nath-Horthath | Location (U) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Turua | 59-72 | Utatti Asfet | CHA2360 | 1996 | Chaosium | Call of Cthulhu (Classic)
| |
| TV Casualties | 36-59 | Atomic-Age Cthulhu | CHA23122 | 2013 | Chaosium | Call of Cthulhu (Atomic)
| |
| The Twelfth Book of Moses | 20-21 | The Unspeakable Oath | 19 | Mar 2011 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Twelve Investigators | Dec 2001 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Twenties: Year by Year | A:20-24 | Cthulhu Britannica: London Box Set | CB7354 | 2014 | Cubicle 7 | Call of Cthulhu (Classic)
| |
| The Twenty Sides of Terror | 128-130 | Worlds of Cthulhu | 1 | Aug 2004 | Pegasus Press | Call of Cthulhu (d20)
| |
| Twila Katherine Price | Character (F) | Journey to Unknown Kadath | CT31 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twila Katherine Price | Character (F) | Twilight Horror | CT26 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twilight | | Chaosium Digest | v24n03 | Mar 1998 | Chaosium | Call of Cthulhu (Classic)
| |
| Twilight | | More Tales of Terror | PAG2105 | 2000 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Twilight Cannibal | Character (F) | Twilight Horror | CT26 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twilight Flood | | Twilight Flood | | 2020 | Grimlord Games | The Everrain
| |
| Twilight Gate | Event (F) | Twilight Horror | CT26 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twilight of the Fifth Sun | 71-84 | The New Orleans Guidebook | CHA2369 | 1997 | Chaosium | Call of Cthulhu (Classic)
| |
| Twilight of the Fifth Sun | 71-83 | Secrets of New Orleans | CHA23114 | 2009 | Chaosium | Call of Cthulhu (Classic)
| |
| Twilight Ritual | Event (F) | Twilight Horror | CT26 | 2009 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twilight Time | 133-136 | The Seventhfold Path | CHA0403 | 2011 | Chaosium | Call of Cthulhu (Classic)
| |
| The Twin Blasphemies | Event (C) | Eldritch Edition | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Twin of You | Character (C) | Masks of Nyarlathotep | | 2005 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Twisted Acropolis | Support (F) | The Sleeper Below | CT63 | 2014 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twisted Choreographer | Character (F) | Perilous Trials | CT41 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twisted Consecration | Event (F) | The Thousand Young | CT65 | 2015 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Twisted Genius | 111-124 | Punktown | | 2018 | Miskatonic River Press | Call of Cthulhu (Cyberpunk)
| |
| Twister | Event (C) | Dreamlands | CAO1307-1 | 1997 | Chaosium | Mythos
| |
| Twists, Slugs and Roscoes | Mar 1998 | hyperwerx.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Two Christmas Goats | Dec 2001 | shoggoth.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Two Christmas Goats | | What Lies Beneath | 1 | Aug 2002 | Self Published | Call of Cthulhu (Classic)
| |
| Two Cities And A Tale | Adventure (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| The Two Dimensional Horror | | Dagon | 12 | Apr 1986 | Self Published | Call of Cthulhu (Classic)
| |
| Two Minutes on High | 48-63 | The Unspeakable Oath | 11 | Jan 1995 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Two Mythos Tomes for Cthulhu Now | | Chaosium Digest | v07n05 | Aug 1994 | Chaosium | Call of Cthulhu (Now)
| |
| Two New Character Templates for Africa | 274-276 | The Masks of Nyarlathotep Companion (Unlimited) | 60-MONC-03 (?) | 2016 | Sixtystone Press | Call of Cthulhu (Classic)
| |
| Two New Skills | 13 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic)
| |
| Two New Types of Insanity | 19 | Cthulhu Companion | CHA2304 | 1983 | Chaosium | Call of Cthulhu (Classic)
| |
| Two of Our Bodies Are Missing | 5-9 | Dagon | 11 | Jan 1986 | Self Published | Call of Cthulhu (Classic)
| |
| Two Sages for Call of Cthulhu | | Chaosium Digest | v03n02 | Jul 1993 | Chaosium | Call of Cthulhu (Classic)
| |
| The Two Scepters | Artifact (F) | Unlimited | CAO1306-1 | 1997 | Chaosium | Mythos
| |
| Two Turntables and a Microphone | 3-16 | Strange Songs | CHA0315 | 2005 | Chaosium | Call of Cthulhu (Now)
| |
| Two-fisted Archeologist | Character (C) | Arkham Edition | | 2004 | Fantasy Flight Games | Call of Cthulhu CCG
| |
| Tycho Base | Location (U) | New Aeon | CAO1311-1 | 1997 | Chaosium | Mythos
| |
| Tycho Erasmus Brahe | | Penny Arcade Characters | | 2009 | Fantasy Flight Games | Arkham Horror
| |
| Tyler Scindere | Character (F) | Whispers in the Dark | CT34 | 2010 | Fantasy Flight Games | Call of Cthulhu LCG
| |
| Type Case | Mar 2011 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| The Typewriter | 2004 | talesofterror.net | | n/a | Self Published | Call of Cthulhu (Classic)
| |
| Typhoid | Event (U) | Limited | CAO1300-1 | 1996 | Chaosium | Mythos
| |
| Typhoon | Event (C) | Expeditions of Miskatonic University | CAO1301-1 | 1996 | Chaosium | Mythos
| |
| A Typical Dunwich Farm | 16-17 | The Unspeakable Oath | 4 | Dec 1991 | Pagan Publishing | Call of Cthulhu (Classic)
| |
| Tyrhhia | Location (F) | Ends of the Earth | | n/a | Self Published | Mythos
| |
| The Tyrr Nemaii | 95-101 | Nocturnum: Deep Secrets | CC03 | 1999 | Fantasy Flight Games | Call of Cthulhu (Now)
| |
| Tzu San Niang | Character (F) | Curse of the Jade Emperor | CT48 | 2011 | Fantasy Flight Games | Call of Cthulhu LCG
| |