| John Pickford | Developer | |
| John Pineapple | Developer | |
| John Poje | Developer | |
| John Pragnell | Developer | |
| John Prince | Developer | |
| John Puleio | Developer | |
| John R. Harness | Developer | |
| John R. Saunders | Developer | |
| John Rajczyba | Developer | |
| John Rausch | Developer | |
| John Retroreloader @ Return learn games | Developer | |
| John Robinson | Developer | |
| John Romero | Developer | |
| John Sebok | Developer | |
| John Sessoms | Developer | |
| John Shramko | Developer | |
| John Silva | Developer | |
| John Spencer | Developer | |
| John Stanley | Developer | |
| John Suave | Developer | |
| John Tatlock | Developer | |
| John Vanderhoef | Developer | |
| John W. Ratcliff | Developer | |
| John Watson | Developer | |
| John White | Developer | |
| John Wildsmith | Developer | |
| John de Salis | Developer | |
| John's Emazing Films | Developer | |
| John-Evans Wagenaar | Developer | |
| John-Games | Developer | |
| John.Dunning | Developer | |
| John32B | Developer | |
| JohnAD | Developer | |
| JohnArr | Developer | |
| JohnDoeNews | Developer | |
| JohnEffKernedy | Developer | |
| JohnGabrielUK | Developer | |
| JohnLee Cooper | Developer | |
| JohnPowow | Developer | |
| JohnRosato | Developer | |
| John_ng | Developer | |
| Johnatan De Lazzari | Developer | |
| Johnjaylayn | Developer | |
| Johnny | Developer | |
| Johnny Dalvi | Developer | |
| Johnny Ginard | Developer | |
| Johnny Ostad | DeveloperPublisher | |
| Johnny Puskar | Developer | |
| Johnny Zhonghao Liang | Developer | |
| JohnnyBiff | Developer | |
| 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 | |