| 2K | video game publisher, video game developer | Novato | 2005 |
| 2K Play | video game publisher | Novato | September 10, 2007 |
| 2K Sports | video game publisher | Novato | January 25, 2005 |
| 3D Realms | video game developer | Garland | 1994 |
| Activision | video game publisher, video game developer, subsidiary company | Santa Monica | October 1, 1979 |
| Aksys Games | business | Torrance | July 14, 2006 |
| Annapurna Interactive | video game publisher, company | Los Angeles | December 1, 2016 |
| ArenaNet | video game developer, business, enterprise | Bellevue | 2000 |
| Aspyr | video game publisher, video game developer | Austin | 1996 |
| Atari Corporation | video game publisher, technology company, business | Sunnyvale | July 2, 1984 |
| Atari Games | video game publisher, video game developer | Milpitas | July 1984 |
| Atari, Inc. | video game publisher, video game developer | Sunnyvale | June 9, 1972 |
| Atari, Inc. | video game publisher, video game developer | New York City | February 1993 |
| Atari, Inc. | video game publisher | New York City | February 1993 |
| Backbone Entertainment | video game developer | Emeryville | 2003 |
| Big Huge Games | video game developer | Timonium | February 2000 |
| BlueSky Software | video game developer | California | 1988 |
| Blur Studio | animation studio, business, enterprise | Venice | 1995 |
| Cavedog Entertainment | video game developer | Bothell | 1996 |
| Cinematronics | video game developer | El Cajon | 1975 |
| Cinemaware | video game publisher, video game developer | Burlingame | 1986 |
| Coleco | brand, business | West Hartford | 1932 |
| Crave Entertainment | video game developer | Newport Beach | 1997 |
| Cryptic Studios | video game developer | Los Gatos | June 2000 |
| Crystal Dynamics | video game developer | Redwood City | 1992 |
| Cyan Worlds | privately held company, video game developer, business | Wilmington, Mead | 1987 |
| Deck Nine | video game developer | Louisville | 1997 |
| EA Orlando | video game developer | Orlando | 1994 |
| EA Sports | business | Burnaby | 1991 |
| Epyx | video game publisher, video game developer, business, enterprise | San Francisco | 1978 |
| Giant Sparrow | video game developer, business, enterprise | Santa Monica | March 22, 2009 |
| Griptonite Games | video game developer | Kirkland | 1994 |
| Hangar 13 | video game developer | Novato | December 4, 2014 |
| Harmonix Music Systems | video game developer | Cambridge | 1995 |
| High Impact Games | video game developer | Burbank | 2003 |
| High Moon Studios | video game developer | San Diego | 2001 |
| Human Head Studios | video game developer | Madison | October 1997 |
| Humble Bundle, Inc. | video game publisher, digital book and audiobook distribution platform, digital distribution platform | San Francisco | March 1, 2010 |
| Imagic | video game publisher, video game developer | Los Gatos | 1981 |
| Incognito Entertainment | video game developer | Salt Lake City | May 1999 |
| InXile entertainment | video game developer | Newport Beach | 2002 |
| Iron Galaxy Studios | video game publisher, video game developer | Chicago | 2008 |
| Irrational Games | video game developer | Boston | 1997 |
| Jakks Pacific | business, public company | Malibu | 1995 |
| Loki Entertainment | video game developer | Tustin | November 9, 1998 |
| Looking Glass Studios | video game developer | Cambridge | 1990 |
| Lucasfilm Games | video game publisher, video game developer | San Francisco, Letterman Digital Arts Center | May 1982 |
| Maxis | video game developer | Emeryville | 1987 |