| Company | Based in | Founded | Industry |
|---|---|---|---|
| Jackbox Games | Chicago | 2008 | video game industry |
| Jadestone Group | Stockholm | 1999 | video game industry |
| Jagex | Cambridge | 1999 | — |
| Jakks Pacific | Malibu | 1995 | video game industry |
| Jaleco | Tokyo | July 3, 2006 | video game industry |
| Jaleco USA | — | 1988 | — |
| Jam City | Los Angeles | 2010 | video game industry |
| JanduSoft | Barcelona | 2012 | video game industry |
| Japan Studio | Tokyo | November 16, 1993 | video game industry |
| Jaw Drop Games | Brighton | April 30, 2020 | — |
| Jellyfish | — | — | — |
| Jellyvision | Chicago | 1989 | video game industry |
| Jet Black Games | Vancouver | 2007 | video game industry |
| JM Neto Game Dev | São Paulo | — | video game industry |
| Johnny Two Shoes | London | August 2007 | — |
| Joindots | Krefeld | — | video game industry |
| Journey Bound Games | Vancouver | — | video game industry |
| JoWooD Ebensee | Ebensee am Traunsee | — | — |
| JoWooD Entertainment | Rottenmann | 1995 | video game industry |
| Jpeg of Pain Games | — | — | video game industry |
| JRC Czech | Prague | August 5, 2003 | video game industry |
| Juggler Games | Warsaw | 2015 | — |
| Jupiter | Kyoto | June 11, 1992 | video game industry |
| Just for Games | Saint-Ouen-sur-Seine | January 12, 2011 | video game publishing |
| JV Games | Paradise | 1994 | video game industry |
| JVC | Yokohama | September 13, 1927 | electronics industry |