| B-Alive GmbH | — | — | — |
| Bad Vices Games | San Claudio | — | video game industry |
| Baggy Cat Entertainment | — | — | — |
| Balancing Monkey Games | Dunedin | 2017 | video game industry |
| Balio Studio | Mons | 2009 | video game industry |
| Banana Bytes | — | — | video game industry |
| Bandai Namco Aces | — | June 2022 | — |
| Bandai Namco Entertainment | Tokyo | March 31, 2006 | video game industry |
| Bandai Namco Online | Minato | October 2009 | video game industry |
| Barnhouse Effect | Tokyo | — | video game industry |
| Batovi Games Studio | Montevideo | 2005 | video game industry |
| BattleGoat Studios | Ancaster | 2000 | video game industry |
| Bauhaus Entertainment | — | — | video game industry |
| Beaglee | Tokyo | October 25, 2004 | — |
| Beamdog | — | 2010 | video game industry |
| Beatshapers | — | 2006 | video game industry |
| BEC | Japan | December 1990 | — |
| BEC Co., Ltd. | Nakano | December 4, 1990 | video game industry |
| Bethesda Softworks | Rockville | 1986 | video game industry |
| Beyond Games | United States | 1992 | video game industry |
| Beyond Software | United Kingdom | 1983 | — |
| BHV | Büttgen | — | video game industry |
| Big Ant Studios | Melbourne | 2001 | video game industry |
| Big Finish Games | Salt Lake City | 2007 | video game industry |
| Big Green Pillow | São Paulo | 2012 | video game industry |
| Big Head Games | — | May 12, 2008 | — |
| Big Huge Games | Timonium | February 2000 | video game industry |
| Big Red Software | United Kingdom | 1988 | — |
| Big Robot | Halstead | 2010 | — |
| Big Viking Games | London | 2011 | video game industry |
| Big Way Games | — | March 2015 | video game industry |
| Bigbig Studios | Leamington Spa | 2001 | — |
| Bimboosoft Co., Ltd. | Saitama | 1998 | video game industry |
| Binary Innovations | — | — | — |
| Binary Zone Interactive | — | — | — |
| Binx Interactive | — | — | — |
| Bioware | Edmonton | February 1995 | video game industry |
| Bit Golem | Kraków | 2015 | video game industry |
| Bit Managers | Barcelona | 1988 | video game industry |
| Bits Laboratory | — | 1985 | video game industry |
| Bitwave Games | — | 2013 | video game industry |
| Black Cube Games | Amstelveen | 2012 | video game industry |
| Black Hole Entertainment | Budapest | 2001 | video game industry |
| Black Isle Studios | Orange County | 1996 | video game industry |
| Black Lantern Studios, Inc. | — | 2003 | video game industry |
| Black Legend Software GmbH | — | — | video game industry |
| Black Ops Entertainment | Santa Monica | 1994 | video game industry |
| Black Pearl Software | — | — | video game industry |
| Black Sheep Studio | Paris | — | video game industry |
| Black Tower Studios | Tokyo | March 8, 2012 | video game industry |
| BlackMill Games | Alkmaar | 2013 | video game industry |
| Blaze | Princeton | — | — |
| Blazing Griffin | Edinburgh | 2011 | — |
| Blind Squirrel Entertainment | Costa Mesa | 2010 | video game industry |
| Blindflug Studios | Zurich | — | video game industry |
| Blitz Games Studios | Leamington Spa | 1990 | — |
| Blizzard Entertainment | Irvine | February 8, 1991 | video game industry |
| Blizzard North | San Mateo | 1993 | video game industry |
| Bloober Team | Kraków | 2008 | video game industry |
| Blow and Try Again | — | — | video game industry |
| Blowfish Studios | Sydney | 2008 | video game industry |
| Blue Fang Games | Waltham | 1998 | video game industry |
| Blue Isle Studios | Toronto | 2010 | video game industry |
| Bluemoon Interactive | — | — | — |
| Blueside | Seoul | 2003 | video game industry |
| BlueSky Software | California | 1988 | video game industry |
| BOKE | Putuo District | April 2010 | video game industry |
| Bokeh Game Studio | Nishi-Shinagawa | August 13, 2020 | video game industry |
| Boltrend Games | Shanghai | — | video game industry |
| Bombservice | — | — | video game industry |
| Bonnier Multimedia | Stockholm | February 13, 1933 | — |
| Bonus Stage Publishing | — | — | video game industry |
| Boss Game Studios | Redmond | 1994 | video game industry |
| Boss Team Games | — | — | video game industry |
| Bossa Studios | London | October 2010 | — |
| BossAlien | Brighton | June 3, 2011 | — |
| Bothtec | Tokyo | August 6, 1997 | video game industry |
| Bplus | Vienna | — | video game industry |
| Brain in a Jar | Cheshire | — | — |
| Brainwash Gang | — | — | video game industry |
| Brass Token | Vancouver | 2017 | video game industry |
| Brave Lamb Studio | — | — | video game industry |
| Bravo Game Studios | — | — | video game industry |
| Bright Future | Cologne | 2006 | video game industry |
| Brinemedia | — | 2011 | video game industry |
| BRIO | Malmö | 1884 | game industry |
| British Broadcasting Corporation | London | 1927 | media industry |
| Broadsword Interactive Limited | Aberystwyth | 1995 | — |
| Broderbund | Novato | 1980 | video game industry |
| Brownies | Tokyo | November 15, 2012 | video game industry |
| Brownmonster | — | May 14, 2015 | — |
| Bulkhead Interactive | Derby | — | — |
| Bullfrog Productions | Guildford | 1987 | — |
| Bungie | Bellevue | May 1991 | video game industry |
| Bunnyhug | Broadstairs | March 27, 2019 | — |
| Burning Goat | Porto Alegre | 2020 | video game industry |
| Burut CT | Voronezh | — | — |
| Byking | — | — | — |
| Byterunners | — | — | video game industry |