| Company | Based in | Founded | Industry |
|---|---|---|---|
| .dat | — | 2003 | — |
| 07th Expansion | — | 2000 | video game industry |
| 1 Simple Game | Zapopan | July 2013 | video game industry |
| 1-Up Studio | Tokyo | June 30, 2000 | video game industry |
| 10tons | Tampere | 2003 | video game industry |
| 14 Degrees East | — | March 3, 1999 | video game industry |
| 17-BIT | Seattle | 2009 | video game industry |
| 1C Company | Moscow | 1991 | software industry |
| 1st Playable Productions | Troy | 2005 | video game industry |
| 20:20 | Ipswich | 1999 | — |
| 22Cans | Guildford | February 20, 2012 | — |
| 2K China | Shanghai | 2006 | video game industry |
| 2K Marin | Novato | December 17, 2007 | video game industry |
| 2K Play | Novato | September 10, 2007 | video game industry |
| 2K Sports | Novato | January 25, 2005 | video game industry |
| 2tainment | — | — | — |
| 2XL Games | Phoenix | 2005 | video game industry |
| 3-Fold Games | Bristol | October 2016 | — |
| 3D Realms | Garland | 1994 | video game industry |
| 3d6 Games | San Mateo | 1999 | video game industry |
| 3LV Games | — | October 2000 | video game industry |
| 3R Games | Warsaw | 2010 | video game industry |
| 4A Games | Sliema | 2006 | video game industry |
| 4J Studios | Dundee | 2005 | — |
| 4mm Games | New York City | 2008 | video game industry |
| 4th Generation Studios | — | — | video game industry |
| 505 Games | Milan | 2006 | video game industry |
| 5am Games | Zurich | — | video game industry |
| 5pb. Inc. | Shibuya | April 6, 2005 | video game industry |
| 7th Level | Dallas | April 28, 1993 | video game industry |
| 9Heads Game Studio | — | — | video game industry |