| M-Ansley | Developer | |
| M-Beca | Developer | |
| M-INDUSTRIES | Developer | |
| M-OZO | Developer | |
| M-Tee | Developer | |
| M. | Developer | |
| M. B. Saunders | Developer | |
| M. Domin | Developer | |
| M. Hata | Developer | |
| M. KIRIN | Developer | |
| M. W. Bayley | DeveloperPublisher | |
| M. Wilcocks | Developer | |
| M.A. GUAX | Developer | |
| M.A. Starling | Developer | |
| M.A. Trace | Developer | |
| M.C. Game | Developer | |
| M.I.N | DeveloperPublisher | |
| M.Knight | Developer | |
| M.N.M Software | DeveloperPublisher | |
| M.R. Games | DeveloperPublisher | |
| M.S.T.O.P. | Developer | |
| M07 Games | DeveloperPublisher | |
| M0uftchup | Developer | |
| M151 Games | Developer | |
| M1lkslyvan | Developer | |
| M1sty | Developer | |
| M2 | DeveloperPublisher | |
| M23BobGames | Developer | |
| M2H | DeveloperPublisher | |
| M2H Game Studio | Developer | |
| M2tias | Developer | |
| M3D | Developer | |
| M4 Entertainment | Developer | |
| M4 Limited | Developer | |
| M4DG4M3R | Developer | |
| M5Altair | Developer | |
| M7md_Ark | Developer | |
| M7™ | Developer | |
| MAC | Developer | |
| MAC404 | Developer | |
| MACAMANDI | Developer | |
| MACDev | Developer | |
| MADEVIL Games | Developer | |
| MADIA Entertainment | Developer | |
| MADiSON Videogame | Developer | |
| MADia Entertainment | Developer | |
| MAHO! Studio | Developer | |
| MAK Computer Graphics | Developer | |
| MAK Computer Graphics (Mark A. Jones) | Developer | |
| MAMARRE_STUDIOS | Developer | |