| B/X Essentials | 2004 | — | United States |
| Babylon 5 Roleplaying Game | 2003 | Mongoose Publishing | United States |
| Bacchanal | 2005 | Half Meme Press | United States |
| BALIKBAYAN: Returning Home | 2019 | — | Philippines |
| Band of Blades | — | Evil Hat Productions | — |
| Barbarians of Lemuria | 2004 | Cubicle 7 | United Kingdom |
| Barons of Braunstein | 2014 | — | — |
| BASH! | 2005 | — | — |
| Basic Fantasy RPG | 2007 | self-published work | — |
| Basic Role-Playing | 1980 | Chaosium | United States |
| Basic Role-Playing (4th ed.) | 2004 | — | United States |
| Batman Role-Playing Game | 1989 | DC Comics | United States |
| BattleDragons | 2002 | — | — |
| Battlelords of the 23rd Century | 1990 | — | — |
| Battlestar Galactica Role Playing Game | 2007 | Margaret Weis Productions | United States |
| Beast Hunters | 2007 | — | — |
| Behind Enemy Lines | 1982 | — | — |
| Belonging Outside Belonging | 2014 | — | — |
| Berlin XVIII | 1988 | — | France |
| Best Friends | 2005 | Box Ninja | United States |
| Beyond the Supernatural | 1988 | Palladium Books | United States |
| Beyond the Supernatural (2nd edition) | 2005 | Palladium Books | United States |
| Beyond the Wall | 2013 | — | — |
| Bifrost | 1977 | — | — |
| Big Bang Comics | 2006 | — | — |
| Big Eyes, Small Mouth | 1997 | Guardians of Order | Canada |
| Bimbo | 2014 | Éditions Sans-Détour | France |
| Birthright | 1995 | TSR | United States |
| Bitume | 1986 | — | France |
| Black Crusade | 2011 | — | — |
| Black Stars Rise | 2013 | — | — |
| Blackmoor | — | — | United States |
| Blackmoor (supplement II) | 1975 | TSR | United States |
| Blackwatch | 1989 | Different Worlds Publications | United States |
| Blade of Arcana | 1999 | — | Japan |
| Blade Runner: The Roleplaying Game | 2022 | — | — |
| Blades in the Dark | 2017 | Evil Hat Productions, One Seven Design | United States |
| Bliaron | 2011 | Northern Realms | Finland |
| Bliss Stage | 2007 | TAO Games | United States |
| Blood & Honor | 2010 | John Wick Presents | United States |
| Blood Dawn | 1996 | — | — |
| Blood of Heroes | 1998 | DC Comics | United States |
| Bloodlust | 1991 | — | France |
| Bloodlust Edition Metal | 2012 | Éditions John Doe / Chibi | France |
| Blowback | 2010 | — | — |
| Blue Planet | 1997 | — | United States |
| Blue Rose | 2013 | Green Ronin Publishing | United States |
| Bluebeard's Bride: a Horror Tabletop RPG | 2017 | Magpie Games | United States |
| Blueholme | 2013 | — | — |
| Boot Hill | 1975 | TSR | United States |
| Brain Soda | 2005 | — | France |
| Brancalonia | 2021 | Acheron Books | Italy |
| Braunstein | — | — | — |
| Brave New World | 1999 | Pinnacle Entertainment Group | United States |
| BREAK!! RPG | 2023 | — | — |
| Breaking the Ice | 2005 | Black and Green Games | United States |
| Brindlewood Bay | 2022 | The Gauntlet | — |
| Brown Stone Texas | — | — | — |
| Bubblegum Crisis | 1996 | R. Talsorian Games | United States |
| Bubblegumshoe | 2016 | Evil Hat Productions | United States |
| Buccaneer | 1979 | — | — |
| Buck Rogers XXVC | 1990 | TSR | United States |
| Buffy the Vampire Slayer Roleplaying Game | 2002 | Eden Studios, Inc. | United States |
| Buffyverse role-playing games | 2002 | Eden Studios, Inc. | United States |
| Bullwinkle and Rocky Role-Playing Party Game | 1988 | — | — |
| Bunnies & Burrows | 1976 | Fantasy Games Unlimited | United States |
| Bureau 13 | 1990 | Tri Tac Games | United States |
| Bureau of Indian Affairs | 2009 | — | — |
| Burning Empires | 2006 | The Burning Wheel | United States |
| Burning Wheel system | 2002 | The Burning Wheel | United States |
| Bushido | 1979 | Fantasy Games Unlimited | United States |
| By the Gods | 1986 | — | — |
| Bylina & Bogatyr | 2005 | self-published work | — |