| Encore, Inc. | 1994 | — | 2 |
| EndlessFluff Games | — | 1 | — |
| Enhance | October 2014 | — | 2 |
| Entex Industries | 1970 | — | 2 |
| Epyx | 1978 | 7 | 7 |
| EV Interactive | — | 2 | 1 |
| Evryware | 1980 | 3 | — |
| Exakt Entertainment | 1999 | 3 | — |
| Excite | 1994 | — | — |
| Executive Office of the President of the United States | 1939 | — | 5 |
| Exidy | 1974 | 1 | — |
| Explosm | 2009 | 1 | — |
| Fabraz | August 2010 | 3 | 1 |
| Fabtek | 1987 | — | 4 |
| Factor 5 | March 15, 2017 | 8 | — |
| FarSight Studios | 1988 | 4 | 4 |
| FASA Corporation | 1980 | — | — |
| FASA Studio | 1995 | 3 | — |
| Fig | 2015 | — | 1 |
| Finite Reflection Studios | May 2017 | 3 | 3 |
| Finji | 2006 | — | 1 |
| Firaxis Games | 1996 | 15 | — |
| Firefly Games | 2015 | — | 1 |
| First Star Software | 1982 | 3 | 3 |
| First Step Cinematics | — | 1 | — |
| Flipline Studios | February 28, 2005 | 27 | — |
| Forgotten Empires | 2013 | 5 | — |
| Foundation 9 Entertainment | March 29, 2005 | 1 | — |
| Free Range Games | — | 2 | 1 |
| Freedom Games | 2020 | — | 30 |
| Freeverse | 1994 | 2 | 3 |
| Freshplanet | 2009 | 1 | — |
| Frog City Software | 1995 | 3 | — |
| Frost Giant Studios | October 20, 2020 | 1 | 1 |
| Frozen Codebase | 2006 | 1 | — |
| Fujisankei Communications International | 1986 | — | 5 |
| Full Moon Features | 1989 | — | 1 |
| Fullbright | 2012 | 1 | — |
| Funktronic Labs | July 18, 2013 | 3 | 3 |
| Funomena | 2013 | 1 | 1 |
| Future Proof Games | — | — | 1 |
| FYRE Games | September 23, 2020 | 2 | 2 |
| G-Collections | 2001 | — | 5 |
| Gabriel Entertainment | 1999 | 4 | — |
| Gaijinworks | 2006 | — | 1 |
| Game Nation | 2011 | 1 | — |
| Gameblyr | 2013 | — | 1 |
| Gamecock Media Group | February 12, 2007 | — | 2 |
| GameHouse | 1991 | 12 | 20 |
| Gamelab | 2000 | 1 | — |
| GameMill Publishing | 2001 | — | 11 |
| GameTek | 1987 | 7 | 16 |
| GarageGames | 2000 | 6 | 20 |
| Gathering of Developers | 1998 | — | 19 |
| Gearbox Publishing | 2016 | — | 3 |
| Gearbox Software | 1999 | 24 | 5 |
| General Mills | 1856 | — | 1 |
| Giant Army | 2011 | 2 | 2 |
| Giant Squid | 2013 | 1 | — |
| Glitch | 2010 | — | 2 |
| Global Star Software | 1995 | — | 7 |
| Global VR | 1998 | — | 1 |
| Glu Mobile | 2005 | 4 | 4 |
| GoodbyeWorld Games | — | 1 | — |
| Goodhustle Studios | — | 2 | — |
| Google | September 4, 1998 | — | 1 |
| Gorilla Systems | 1995 | 1 | — |
| Got Game Entertainment | — | — | 5 |
| Gotham Games | 2002 | — | 2 |
| Gottlieb | 1997 | 1 | — |
| GrabTheGames | 2012 | 4 | 36 |
| Griptonite Games | 1994 | 14 | — |
| Grolier | 1895 | — | 1 |
| Grumpyface Studios | — | 4 | — |
| Gun Interactive | — | — | 2 |
| Half Mermaid Productions | 2017 | 1 | 1 |
| Halo Studios | 2009 | 7 | — |
| Handheld Games | — | 2 | — |
| Hands-On Mobile | 2001 | 1 | 3 |
| Harebrained Schemes | 2011 | 6 | — |
| Harmonix Music Systems | 1995 | 27 | 4 |
| Hasbro | 1923 | — | 2 |
| Hasbro Interactive | 1995 | 4 | 18 |
| Heart Machine | 2013 | 1 | — |
| Heart Shaped Games | — | 1 | 1 |
| Heartomics | — | 4 | 4 |
| Heavy Iron Studios | 2005 | 5 | — |
| Helixe | July 2000 | 1 | — |
| Her Interactive | 1995 | 36 | 14 |
| HESware | 1980 | — | 1 |
| Heuristic Park | 1995 | 1 | — |
| Hi Tech Expressions | 1988 | — | 3 |
| Hi-Rez Studios | 2005 | 3 | 4 |
| Hidden Path Entertainment | 2006 | 10 | 7 |
| High Impact Games | 2003 | 4 | — |
| High Moon Studios | 2001 | 7 | — |
| High Voltage Software | 1993 | 19 | 1 |
| Himalaya Studios | — | 1 | 1 |
| HipSoft | — | 4 | — |
| Holistic Design | 1992 | 3 | — |