| Automata UK | United Kingdom | 1977 | — | 2 |
| Autumn Games | United States | 2007 | — | 2 |
| AV Games | Russia | — | 1 | — |
| Avalanche Software | United States | 1995 | 8 | — |
| Avalanche Studios Group | Sweden | 2003 | 5 | — |
| Avalon Hill | United States | 1958 | 4 | 9 |
| Avalon Interactive | United Kingdom | 2003 | — | 1 |
| Aventurine SA | Greece | 2003 | 1 | — |
| Aviary Films | United Kingdom | June 13, 2007 | 1 | 1 |
| Awaceb | France | — | 1 | — |
| Awaken Realms | Poland | — | 1 | 3 |
| AWE Games | — | 1997 | 3 | — |
| Awesome Games Studio | Poland | — | 1 | 1 |
| Axel Springer SE | Germany | 1946 | — | 1 |
| Axis Games | United States | 2003 | 1 | 1 |
| Axol Studio, LLC | United States | 2015 | 6 | 6 |
| Axyos Games | Georgia | — | 2 | 4 |
| AZAMATIKA | Russia | — | 4 | 4 |
| Azeroth, Inc. | United States | — | 1 | — |
| B-Alive GmbH | Germany | — | 1 | — |
| Babaroga | United States | 2002 | 2 | — |
| Backbone Emeryville | United States | 2003 | 1 | — |
| Backflip Studios | United States | March 2009 | 1 | — |
| Bad Dream Games | United States | — | 1 | — |
| Bad Vices Games | Italy | — | 2 | 1 |
| BadLand Games | Spain | 2011 | — | 1 |
| Baggy Cat Entertainment | United Kingdom | — | 1 | 1 |
| Bajoum | Sweden | November 11, 1997 | 3 | 1 |
| Balancing Monkey Games | New Zealand | 2017 | 1 | 1 |
| Balio Studio | Belgium | 2009 | 4 | — |
| Baltoro Games | Poland | — | 4 | 4 |
| BAM! Entertainment | United States | October 7, 1999 | — | 5 |
| Bamtang Games | Peru | 2002 | 3 | — |
| Banana Bytes | Brazil | — | 1 | — |
| Bandai | Japan | July 5, 1950 | 35 | 93 |
| Bandai Namco Aces | Japan | June 2022 | 1 | — |
| BANDAI NAMCO Amusement Lab | Japan | October 2018 | 2 | — |
| Bandai Namco Entertainment | Japan | March 31, 2006 | 93 | 313 |
| Bandai Namco Entertainment Romania | Romania | — | 1 | — |
| Bandai Namco Forge Digitals | Japan | 1994 | 5 | — |
| Bandai Namco Holdings | Japan | 2005 | 8 | 27 |
| Bandai Namco Online | Japan | October 2009 | 1 | — |
| Bandai Namco Studios | Japan | April 2, 2012 | 14 | — |
| Bandai Namco Studios Vancouver | — | March 2013 | 1 | — |
| Banpresto | Japan | April 30, 1977 | 27 | 43 |
| Barbacube | Argentina | 2013 | 1 | — |
| Barnhouse Effect | Japan | — | 5 | — |
| Basilisk Games | United States | 2005 | 2 | 2 |
| Batovi Games Studio | Uruguay | 2005 | 2 | 2 |
| BattleGoat Studios | — | 2000 | 6 | 3 |
| Bauhaus Entertainment | Japan | — | 1 | — |
| Bay 12 Games | United States | — | 1 | — |
| BBC Multimedia | United Kingdom | 1995 | — | 7 |
| BBC Worldwide | United Kingdom | 1979 | 1 | 2 |
| Beaglee | Japan | October 25, 2004 | 1 | 2 |
| Beamdog | Canada | 2010 | 5 | 1 |
| Beautiful Game Studios | United Kingdom | 2003 | 4 | — |
| Beautiful Glitch | Spain | — | 1 | — |
| BEC | Japan | December 1990 | 2 | — |
| BEC Co., Ltd. | Japan | December 4, 1990 | 1 | — |
| Bedtime Digital Games | Denmark | — | 2 | 2 |
| Beenox | Canada | 2000 | 9 | — |
| Behaviour Rotterdam | Netherlands | — | 4 | — |
| Behold Studios | Brazil | 2009 | 1 | 1 |
| Bellular Studios | United Kingdom | — | 1 | — |
| Bemani | Japan | 1997 | 11 | — |
| Bend Studio | United States | 1994 | 11 | — |
| Bergsala Lightweight | Japan | 1995 | 1 | — |
| Berzerk Studio | Canada | December 4, 2008 | 1 | — |
| Best Way | Ukraine | 1991 | 6 | — |
| Bethesda Game Studios | United States | 2001 | 6 | — |
| Bethesda Game Studios Dallas | United States | — | 1 | — |
| Bethesda Softworks | United States | 1986 | 10 | 53 |
| BeXide | Japan | February 1999 | 5 | 1 |
| Beyond Games | United States | 1992 | 1 | — |
| Beyond Interactive | Japan | August 8, 1989 | 1 | — |
| Beyond Software | United Kingdom | 1983 | — | 2 |
| Beyondthosehills | Greece | — | 1 | — |
| Big Ant Studios | Australia | 2001 | 10 | 2 |
| Big Ape Productions | United States | 1997 | 1 | — |
| Big Bad Wolf | France | — | 1 | — |
| Big Blue Bubble | Canada | 2004 | 5 | 3 |
| Big Finish Games | United States | 2007 | — | — |
| Big Fish Games | United States | 2002 | 12 | 68 |
| Big Green Pillow | Brazil | 2012 | 4 | — |
| Big Head Games | United Kingdom | May 12, 2008 | — | 1 |
| Big Huge Games | United States | February 2000 | 2 | — |
| Big Red Software | United Kingdom | 1988 | 5 | — |
| Big Viking Games | Canada | 2011 | 1 | — |
| Bigbig Studios | United Kingdom | 2001 | 1 | — |
| Bigpoint GmbH | Germany | 2002 | 5 | 4 |
| Bikkuri Software | Japan | — | 1 | — |
| Bilibili | People's Republic of China | June 26, 2009 | — | 15 |
| Bimboosoft Co., Ltd. | Japan | 1998 | 1 | — |
| Binary Haze Interactive | Japan | June 2020 | — | 3 |
| Binogure Studio | France | 2018 | 2 | 2 |
| Binx Interactive | Croatia | — | 1 | — |
| Bioware | Canada | February 1995 | 30 | — |
| Birthday | Japan | — | 5 | — |
| Bit Fry | United States | November 2013 | 2 | 2 |