J1: Entombed with the Pharaohs
Paizo Publishing: d20 3.5 (2007 )

J2: Guardians of Dragonfall
Paizo Publishing: d20 3.5 (2007 )

J3: Crucible of Chaos
Paizo Publishing: d20 3.5 (2008 )

J4: The Pact Stone Pyramid
Paizo Publishing: d20 3.5 (2008 )

J5: Beyond the Vault of Souls
Paizo Publishing: d20 3.5 (2009 )

Jade and Steel
Avalanche Press: d20 3 (2001 )

Jade Colossus: Ruins of the Prior Worlds
Monte Cook Games: Numenera 1 (2017 Hardcover)

Jade Dragons & Hungry Ghosts
Green Ronin Publishing: d20 3 (2001 )

The Jade Hare
TSR: D&D / Basic 3 (1992 )

The Jade Magi Sewer Crawl
MonkeyGod Enterprises: d20 3 (2002 )

Jade Regent Player's Guide
Paizo Publishing: Pathfinder 1 (2011 )

Jade Regent Post Map Folio
Paizo Publishing: Generic 1 (2012 Looseleaf)

The Jade Serpent of Yig
Green Ronin Publishing: d20 3 (2001 PDF)

Jadeclaw: Anthropomorphic Fantasy Role-Playing
Sanguine Productions: Jadeclaw 1 (2002 )
Sanguine Productions: Jadeclaw 1 (2006 Hardcover)

JAGS Chi Martial Arts
Self-published: JAGS 1 (2001 PDF)

JAGS Cyborgs
Self-published: JAGS 1 (2001 PDF)

JAGS Have-Nots
Better Mousetrap Games: JAGS 1.5 (2005 PDF)

JAGS Psionic Abilities
Self-published: JAGS 1 (2001 PDF)

JAGS
Self-published: JAGS 2 (2006 )
Lulu: JAGS 2 (2006 Hardcover)

JAGS Wonderland
Better Mousetrap Games: JAGS 2 (2005 PDF)

JAGS-2
Self-published: JAGS-2 1 (2004 )

Jailbreak!
Adamant Entertainment: Icons 1 (2010 PDF)

Jaiman: Land of Twilight
I.C.E.: Rolemaster 2.5 (1989 )
I.C.E.: HERO 3 (1989 )

A Jakállan Intrigue
Tékumel Games: Swords & Glory 1 (1984 )
Tita's House of Games: Swords & Glory 1 (1997 )

Jakandor, Island of War
TSR: AD&D 2 (1997 )

Jakandor, Isle of Destiny
TSR: AD&D 2 (1998 )

Jakandor, Land of Legend
TSR: AD&D 2 (1998 )

James Bond 007 Assault! Board Game
Victory Games: James Bond 007 1 (1986 Box)

James Bond 007
Victory Games: James Bond 007 1 (1983 )
Victory Games: James Bond 007 1 (1983 )

James Bond 007 Gamesmaster Pack
Victory Games: James Bond 007 1 (1983 Box)

James M. Ward's Metamorphosis Alpha Universe
Fast Forward Entertainment: Metamorphosis Alpha 3 (2002 )

The James-Younger Gang
Dog House Rules: Sidewinder: Recoiled 1 (2006 PDF)

Jane Austen's "Emma"
Malcolm Harbrow: Generic 1 (2017 PDF)

January's Frost
Self-published: Generic / One-Off System 1 (2005 PDF)

Japan - Empire of Shadows
Miskatonic Repository: Call of Cthulhu 7 (2023 Hardcover)

Jason's First Quest
TSR: Fiction (1984 )

The Jaws of Death
Bards and Sages Publishing: d20 3.5 (2010 PDF)

Jaws of the Barracado
Galileo Games: Fate 3 (2011 PDF)

Jaws of the Six Serpents
Silver Branch Games: PDQ 1 (2009 )

The Jedi Academy Sourcebook
West End Games: Star Wars d6 2.5 (1998 Hardcover)

Jedi Academy Training Manual
Wizards of the Coast: Star Wars d20 3 (2009 Hardcover)

Jedi's Honor
West End Games: Star Wars d6 1 (1990 )

Jedit
Wizards of the Coast: Fiction (2001 )

Jeremiah the Roleplaying Game
Mongoose Publishing: d20 3.5 (2005 )

The Jericho Reach
Fantasy Flight Games: Deathwatch 1 (2012 Hardcover)

Jerimond's Orb
AEG: d20 3 (2000 )

Jerry’s Midnight Tales
Pinnacle: Savage Worlds 1 (2006 PDF)

The Jersey Side
Bully Pulpit Games: Fiasco 1 (2011 PDF)

Jerusalem by Night
White Wolf Publishing: Storyteller System: Dark Ages 1 (1999 )

Jester
Alluria Publishing: Dungeons & Dragons 4 (2010 PDF)

Jet Set
Catalyst Game Labs: Shadowrun 4 (2012 )

Jewel of the Empire
Cubicle 7 Entertainment: Heresy Engine 1 (2010 )

The Jewel of Turmish
Wizards of the Coast: Fiction (2002 )

The Jewel of Yavin
Fantasy Flight Games: Edge of the Empire 1 (2014 Hardcover)

Jeweled Thrones of the Earth
Modiphius Entertainment: Conan 2d20 1 (2017 )

Jewels of the Carnifex
Goodman Games: Dungeon Crawl Classics 1 (2012 )

JG1: Thieves of Fortress Badabaskor
Goodman Games: d20 3.5 (2007 )

JG2: Citadel of Fire
Goodman Games: d20 3.5 (2007 )

JG3: Dark Tower
Goodman Games: d20 3.5 (2007 )

The Jihad to Destroy Barney
Self-Published: GURPS 4 (2006 )

JINGO
Hex Games: QAGS 2 (2011 PDF)

JLA Sourcebook
West End Games: d6 Legend 1 (2000 )

JMD01: Beneath the Ghoul Lair
Johnny Rook Games: OSRIC 2 (2011 )

JN1: The Chaotic Caves
Self-published: Basic Fantasy 2 (2011 )
Self-published: Basic Fantasy 2 (2011 )
Self-published: Basic Fantasy 2 (2013 )
Self-published: Basic Fantasy 2 (2009 PDF)

JN2: Monkey Isle
Self-published: Basic Fantasy 2 (2010 PDF)
Self-published: Basic Fantasy 2 (2013 )
Self-published: Basic Fantasy 2 (2014 )
Self-published: Basic Fantasy 2 (2014 )

JN3: Saga of the Giants
Self-published: Basic Fantasy 2 (2014 PDF)

Joan of Arc
Black Book Editions: Dungeons & Dragons 5 (2019 Hardcover)
Mythic Games: Dungeons & Dragons 5 (2019 Hardcover)

John Carter of Mars Core Rulebook
Modiphius Entertainment: John Carter 2d20 1 (2018 Hardcover)

John Carter of Mars Quickstart
Modiphius Entertainment: John Carter 2d20 1 (2018 PDF)

John Carter, Warlord of Mars
Heritage Models: Generic / One-Off System 1 (1978 )

Jonril: Gateway to the Sunken Lands
Midkemia Press: Generic (1982 )

Jorgi's Bestiary
Riotminds: Trudvang Chronicles 1 (2017 Hardcover)

Joshuan's Almanac & Book of Facts
TSR: AD&D 2 (1995 )

The Journal of Campbell Thompson
Cubicle 7 Entertainment: Fiction (2015 Hardcover)

The Journal of Franklin Von Mookenstein
Cracked Mirror Publishing: Mutants & Masterminds 2 (2006 PDF)

The Journal of Neve Selcibuc
Cubicle 7 Entertainment, UK: Fiction (2015 Hardcover)

The Journal of Reginald Campbell Thompson
Cubicle 7 Entertainment, UK: Fiction (2015 Hardcover)

The Journal of the Travellers' Aid Society #1: Annic Nova
GDW: Traveller 1 (1979 Digest)

Best of The Journal of the Travellers' Aid Society #1: Selected Articles from Journals 1 to 4
GDW: Traveller 1 (1980 Digest)

The Journal of the Travellers' Aid Society #2: Victoria
GDW: Traveller 1 (1979 Digest)

The Best of The Journal of the Travellers' Aid Society #2: Selected Articles from Journals 5 to 8
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #3: Asteroid Mining
GDW: Traveller 1 (1979 Digest)

The Best of The Journal of the Travellers' Aid Society #3: Selected Articles from Jounals 9-12
GDW: Traveller 1 (1982 Digest)

The Journal of the Travellers' Aid Society #4
GDW: Traveller 1 (1980 Digest)

The Best of The Journal of the Travellers' Aid Society #4
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #5: Imperium
GDW: Traveller 1 (1980 Digest)

The Journal of the Travellers' Aid Society #6
GDW: Traveller 1 (1980 Digest)

The Journal of the Travellers' Aid Society #7
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #8: Broadsword
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #9: War!
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #10: A Referee's Guide to Planet-Building
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #11: Striker Miniatures Issue
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #12
GDW: Traveller 1 (1981 Digest)

The Journal of the Travellers' Aid Society #13: Hivers
GDW: Traveller 1 (1982 Digest)

The Journal of the Travellers' Aid Society #14: Laws & Lawbreakers
GDW: Traveller 1 (1982 Digest)

The Journal of the Travellers' Aid Society #15: Azun
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #16: SuSAG
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #17: Atmospheres
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #18: Traveling without Jumping
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #19: 'Skyport Authority'
GDW: Traveller 1 (1983 Digest)

The Journal of the Travellers' Aid Society #20: Special Aslan Issue
GDW: Traveller 1 (1984 Digest)

The Journal of the Travellers' Aid Society #21: Vargr
GDW: Traveller 1 (1984 Digest)

The Journal of the Travellers' Aid Society #22
GDW: Traveller 1 (1985 Digest)

The Journal of the Travellers' Aid Society #23
GDW: Traveller 1 (1985 Digest)

The Journal of the Travellers' Aid Society #24: Religion in the Two Thousand Worlds
GDW: Traveller 1 (1985 Digest)

The Journal of the Travellers' Aid Society #25
Imperium Games: Traveller 4 (1996 )

The Journal of the Travellers' Aid Society #26
Imperium Games: Traveller 4 (1997 )

The Journey
Palladium Books: Megaversal 1 (1982 )

Journey into Riddle Canyon
Expeditious Retreat Press: Pathfinder 1 (2009 )

Journey Through the Center of the Underdark
Dungeon Masters Guild: Dungeons & Dragons 5 (2016 PDF)

Journey Through the Center of the Underdark 2: The Darklake Strikes Back
Dungeon Masters Guild: Dungeons & Dragons 5 (2016 PDF)

Journey Through the Silver Caves
Wizards of the Coast: Dungeons & Dragons 4 (2009 )

Journey to Black Fire Pass
Fantasy Flight Games: Warhammer Fantasy Roleplay 3 (2010 PDF)

Journey to Lang
RedBrick: Earthdawn Classic 1 (2006 PDF)

Journey to the Center of the Circle
Wilmark Dynasty: Generic 1 (1981 )

Journey to the End of Light
New Dimension Games: Starquest 1 (2006 )

Journey to the Magic Isle
I.C.E.: Rolemaster 2.5 (1989 )
I.C.E.: HERO 3 (1989 )

Journey to the Red Temple
Reality Blurs: Savage Worlds 2 (2009 PDF)

Journeying West
TAO Games: Under the Bed 1 (2007 )

Journeys & Maps
Cubicle 7 Entertainment: One Ring 1 (2016 )

Journeys to the West
Kobold Press: Pathfinder 1 (2012 )

Journeys: Journal of Multidimensional Roleplaying #1
GDW: Generic (1992 )

Journeys: Journal of Multidimensional Roleplaying #2
GDW: Generic (1992 )

Journeys: Journal of Multidimensional Roleplaying #3
GDW: Generic (1992 )

Journeys: Journal of Multidimensional Roleplaying #4
GDW: Generic (1993 )

Journeys: Journal of Multidimensional Roleplaying #5
GDW: Generic (1993 )

Journeys: Journal of Multidimensional Roleplaying #6
GDW: Generic (1993 )

Journeys: Pirates of the Western Ocean
Kobold Press: Pathfinder 1 (2012 PDF)

Jovian Chronicles
Ianus Publications: Mekton / Interlock 1 (1993 )

Jovian Chronicles
Dream Pod 9: Silhouette 2 (1997 )

Jovian Chronicles Companion
Dream Pod 9: Silhouette 2 (1997 )

Jovian Chronicles Mechanical Catalog
Dream Pod 9: Silhouette 2 (1997 )

Jovian Chronicles
Dream Pod 9: Silhouette 3 (2003 Hardcover)
Dream Pod 9: d20 Modern 1 (2003 Hardcover)

Jovian Chronicles: Gamemastering Made Easy
Dream Pod 9: Silhouette 2 (1998 )

Jovian Fleet Blueprint File
Dream Pod 9: Generic 1 (1998 Looseleaf)

Jovian Nightmares
Chaosium: Call of Cthulhu 6 (2009 )

Jrustela
Mongoose Publishing: RuneQuest / Mongoose 1 (2007 Hardcover)
Mongoose Publishing: RuneQuest / Mongoose 1 (2007 )

JSA Sourcebook
West End Games: d6 Legend 1 (2001 )

Judas Crossing
Kenzer & Company: Aces & Eights 1 (2009 )

The Judas Grail
Metropolis: Kult 1 (1996 )

Judge Dredd
Mongoose Publishing: Traveller / Mongoose 1 (2009 Hardcover)

Judge Dredd Companion
Games Workshop: Judge Dredd 1 (1987 )

The Judge Dredd Roleplaying Game
Mongoose Publishing: Judge Dredd d20 1 (2002 Hardcover)

Judge Dredd: The Role Playing Game
Games Workshop: Judge Dredd 1 (1985 Box)
Games Workshop: Judge Dredd 1 (1989 Hardcover)

Judge's Shield
Judges Guild: D&D / Original 1 (1977 Looseleaf)

Judgement Day
Games Workshop: Judge Dredd 1 (1986 )

Judges & Players Modron Maps
Judges Guild: Generic 1 (1977 Looseleaf)

Judges Cartography: Campaign Map 18 -- Southern Reaches
Adventure Games Publishing: Generic 1 (2008 PDF)

Judges City Map
Judges Guild: Generic 1 (1976 Looseleaf)

Judges City State Campaign Map One
Judges Guild: Generic 1 (1977 Looseleaf)

Judges Guild Deluxe Collector's Edition, volume 1
Goodman Games: Generic 1 (2016 Hardcover)

The Judges Guild Journal #4: Installment M
Judges Guild: Generic 1 (1977 )

The Judges Guild Journal #12: Holiday Issue 12 (U)
Judges Guild: D&D / Original 1 (1978 )

The Judges Guild Journal #13
Judges Guild: D&D / Original 1 (1979 )

The Judges Guild Journal #14
Judges Guild: D&D / Original 1 (1979 )

The Judges Guild Journal #15
Judges Guild: D&D / Original 1 (1979 )

The Judges Guild Journal #19
Judges Guild: Generic 1 (1980 )

Judges Guild's Bob and Bill, A Cautionary Tale
Game Design: Generic 1 (2009 Hardcover)
Game Design: Generic 1 (2009 )

Tegel Manor and Wilderness Map
Judges Guild: Generic 1 (1977 Looseleaf)
Judges Guild: Generic 1 (1977 Looseleaf)

Judges' Handbook
Mongoose Publishing: Traveller / Mongoose 1 (2010 )

Judges' Handbook II
Mongoose Publishing: Traveller / Mongoose 1 (2013 PDF)

Juggernaut
Bully Pulpit Games: Generic / One-Off System 1 (2015 Box)

Jump Angels and Jump Demons
Jon Brazer Enterprises: Traveller 1 (2009 PDF)

Jumpers: Survivial Roleplaying in the Infinite Multiverse
Pawn & Hex Games: Generic (2011 PDF)

Jung Guns
Self-published: Jung Guns 1 (2009 PDF)

Jungle Adventure
Memento Mori Theatricks: Parsely 1 (2010 Looseleaf)

Jungle Alchemy
Bards and Sages Publishing: d20 3.5 (2010 PDF)

The Jungle of Horrors
Beaver Books: Lone Wolf 1 (1987 )
Project Aon: Lone Wolf (2000 PDF)

Jungle Of Lost Souls
Judges Guild: Tunnels & Trolls 5 (1983 )

Jungle Temple Vinyl Game Mat
Gale Force Nine: Dungeons & Dragons 4 (2010 Looseleaf)

Jungles of the K'naanothoa
Self-published: AD&D 1 (2016 )

Junk Noir
Jade Ravens: Generic / One-Off System 1 (2023 )

The Junkman Cometh
Pinnacle: Deadlands 1 (1998 )

Jupiter Planet Sourcebook
Dream Pod 9: Silhouette 2 (2000 )

Just a Delivery
Goodman Games: Etherscope 1 (2005 )

Just a Few Baubles
Action Check: Alternity (2001 PDF)

Just Compensation
ROC: Fiction (1996 )

Justice Inc.
Hero Games: HERO 3 (1984 Box)

Justice League Sourcebook
Mayfair Games: DC Heroes 2 (1990 )

The Justice Machine
Palladium Books: Heroes Unlimited 1 (1985 )

The Justice Trade
Pelgrane Press: Ashen Stars 1 (2013 )

Justice, Not Law
Hero Games: HERO 4 (1993 )
I.C.E.: HERO 4 (1993 )

Justifiers RPG
Ulisses Spiele, Germany: Justifiers 1 (2010 Hardcover)
StarChilde Publications: Justifiers 1 (1988 )