| JohnnyDale | Developer | |
| JohnnyOstad | Developer | |
| JohnnyOuh | Developer | |
| JohnnyR | Developer | |
| Johnsensei | Developer | |
| Johnsey | Developer | |
| Johnson Voorsanger Productions | Developer | |
| Johnson-Voorsanger Productions | Developer | |
| JohnsterSpaceGames | Developer | |
| Johny Daison | Developer | |
| JohnyF66 | Developer | |
| JohnyGubbins | Developer | |
| Johomi | Developer | |
| JoiSigurdss | Developer | |
| Joindots | DeveloperPublisher | |
| Joined Up Writing Software | Developer | |
| JointPointStudios | Developer | |
| Jojee | Developer | |
| Jojoffrey | Developer | |
| Jojosoft | Developer | |
| Jojovo | Developer | |
| Jojums | Developer | |
| Joker101 | Developer | |
| Jokerkingz | Developer | |
| JokubasG | Developer | |
| JoleEh | Developer | |
| Jolly Crouton Media Ltd. | Developer | |
| Jolly Roger Productions | Developer | |
| JollyGoodFellow | Developer | |
| Jollypunch Games | DeveloperPublisher | |
| JoltJab | Developer | |
| Joms | Developer | |
| Jon Cartwright | Developer | |
| Jon Cortelyou | Developer | |
| Jon Cote | Developer | |
| Jon Coughlin | Developer | |
| Jon Harrison | Developer | |
| Jon Harwood Games | Developer | |
| Jon Jon Games Studios, Inc.® | Developer | |
| Jon Law | Developer | |
| Jon Oldblood | Developer | |
| Jon Paul Eldridge | Developer | |
| Jon Reid | Developer | |
| Jon Remedios | Developer | |
| Jon Ritman | Developer | |
| Jon Steele | Developer | |
| Jon Stone | Developer | |
| Jon Sweedler | Developer | |
| Jon Tiburzi | Developer | |
| Jon Topielski | Developer | |