| Mr. Micro (David Whittaker) | Developer | |
| Mr. Micro (Gary Patchen, David Whittaker, Ian Upton) | Developer | |
| Mr. Micro Ltd (John May, John White, David Whittaker) | Developer | |
| Mr. Moo | Developer | |
| Mr. Nutz Studio | Developer | |
| Mr. Shellduck | Developer | |
| Mr. Thee | Developer | |
| Mr. Tired Media | Developer | |
| Mr. Whale's Game Service | Developer | |
| Mr. Whale’s Game Service | Publisher | |
| Mr. Yellow | Developer | |
| Mr.Blue | Developer | |
| Mr.Cubee | Developer | |
| Mr.GGdev | Developer | |
| Mr.Hippo | Developer | |
| Mr.Houdini | Developer | |
| Mr.Patches | Developer | |
| Mr.Skull Game Studio | Developer | |
| Mr.ToadFrog | Developer | |
| Mr.ToastyGamer | Developer | |
| Mr.Watermelon | Developer | |
| Mr.Wig82 | Developer | |
| Mr.Zhang | Developer | |
| Mr.cool projects mods | Developer | |
| MrAlpacaGames | Developer | |
| MrBaba | Developer | |
| MrBiggles1 | Developer | |
| MrBundles | Developer | |
| MrCerealGuy | Developer | |
| MrChickenBoy | Developer | |
| MrCiastku | Developer | |
| MrCojoEntertainment | Developer | |
| MrDee Games | Developer | |
| MrEkShun | Developer | |
| MrFrinky | Developer | |
| MrHelmut | Developer | |
| MrHolmes | Developer | |
| MrHommeCrabe | Developer | |
| MrHoot2000 | Developer | |
| MrJake7X | Developer | |
| MrJotubes | Developer | |
| MrKnd94 | Developer | |
| MrLW | Developer | |
| MrLeePerry | Developer | |
| MrLuchs | Developer | |
| MrMandolino | Developer | |
| MrMcKaboom | Developer | |
| MrMegawatts | Developer | |
| MrMixerr (Mantas) | Developer | |
| MrMixxxeR | Developer | |
| MrMoist | Developer | |
| MrNerix | Developer | |
| MrNoupGames | Developer | |
| MrPingvin | Developer | |
| MrPotato027 | Developer | |
| MrPr1993 | Developer | |
| MrRamm | Developer | |
| MrRockett | Developer | |
| MrScottyPieey | Developer | |
| MrSerji | Developer | |
| MrShibby | Developer | |
| MrSketchyBoi | Developer | |
| MrSnakeGames | Developer | |
| MrSnappingTurtle | Developer | |
| MrStahlfelge | Developer | |
| MrSxythe | Developer | |
| MrTedders | Developer | |
| MrTheFly | Developer | |
| MrTheKunzer | Developer | |
| MrTurtle2005 | Developer | |
| MrUnimaxYT | Developer | |
| MrUnity | Developer | |
| MrWahloh | Developer | |
| MrYeti09 | Developer | |
| Mr_Aporia | Developer | |
| Mr_Epicco123 | Developer | |
| Mr_Goburin | Developer | |
| Mr_Mutant | Developer | |
| Mr_Noonan | Developer | |
| Mr_Qqn | Developer | |
| Mr_Raspberry_JAM | Developer | |
| Mr_SMOKE | Developer | |
| Mr_Twan | Developer | |
| Mrar Games | Developer | |
| Mravec | Developer | |
| MraveniskoDev | Developer | |
| Mrdocktorman | Developer | |
| Mrfilmflamise | Developer | |
| Mrhatsy | Developer | |
| MrleChocobo | Developer | |
| MrmediamanX | Developer | |
| Mrneo240 | Developer | |
| MrodCreative | Developer | |
| Mrp1 | Developer | |
| Ms .45 | Developer | |
| MsLilly | Developer | |
| MuHa Games | DeveloperPublisher | |
| MuNgLo | Developer | |
| MuSloth Studios | Developer | |
| Mucahit Temel | Developer | |
| MuchoBestoStudio | Developer | |
| MuchosWaffles | Developer | |
| Muciojad | Developer | |
| MuckGames | Developer | |
| Mucky Foot | Developer | |
| Mucky Foot Productions | Developer | |
| Mud Duck Productions | DeveloperPublisher | |
| Mud Duck ProductionsNA | Publisher | |
| Muddyfunster | Developer | |
| Mudvark | Developer | |
| Muffin | Developer | |
| Muffyn | Developer | |
| Mugen | DeveloperPublisher | |
| Mugiartes | Developer | |
| Mugs Games | Developer | |
| MuhamedGalal | Developer | |
| Muhammad H. Albayati | Developer | |
| MuhammadAdilGahalta | Developer | |
| Muit | Developer | |
| Mujo Games | Developer | |
| Mukul Negi | Developer | |
| Mulawa Dreaming | DeveloperPublisher | |
| Mulberg | Developer | |
| Mulham Raee | Developer | |
| Mulholland | Developer | |
| Mulligamez | Developer | |
| Multicort | Developer | |
| Multima | Developer | |
| Multimedia Content | Publisher | |
| Multimedia Intelligence Transfer | Developer | |
| Multiplayer Slasher | Developer | |
| Multiplex Games | Developer | |
| MultisoftJP | Publisher | |
| Multithreaded Games | Developer | |
| Multivarious | Developer | |
| MultiwoldGames | Developer | |
| Mults | Developer | |
| Mumb0 | Developer | |
| Mumblejum | Developer | |
| MumboJumbo | DeveloperPublisher | |
| MumboJumbo, LLC | Publisher | |
| Mumimumi | Developer | |
| Mundane | Developer | |
| Mundane Games | Developer | |
| Mundfish | DeveloperPublisher | |
| Munguía | Developer | |
| Muniu | Developer | |
| Munkiewunk63 | Developer | |
| Munro | Developer | |
| Munsie | Developer | |
| MurGonBol | Developer | |
| Murasakigame | Developer | |
| Murilo Trigo | Developer | |
| MuriloDev | Developer | |
| Murkje | Developer | |
| Murman | Developer | |
| Muro Studios | DeveloperPublisher | |
| Murphie_Whinstock | Developer | |
| Murray Campbell | Developer | |
| Murray Krehbiel | Developer | |
| MuruiGames | Developer | |
| MuscularHair | Developer | |
| Muse Games | DeveloperPublisher | |
| Muse Software | DeveloperPublisher | |
| Musesoft | Developer | |
| Museworthy | Developer | |
| Mush | Developer | |
| Mushi | Developer | |
| Mushin Games | Developer | |
| Mushroom Canopy | Developer | |
| MushroomCourt | Developer | |
| Mushy Dev | Developer | |
| Mushy Jukebox | Developer | |
| MusiCard | Developer | |
| Music Pen | Developer | |
| MustacheLincoln | Developer | |
| MustacheSkulls | Developer | |
| MustachioGames | Developer | |
| Mustafa Alnsour | Developer | |
| MustafaAkyazici | Developer | |
| Musthegreat | Developer | |
| Musumeya | DeveloperPublisher | |
| Mutan | DeveloperPublisher | |
| Mutant Productions | Developer | |
| Mutated Software | DeveloperPublisher | |
| Mute Fantasies | DeveloperPublisher | |
| Muteki Corporation | DeveloperPublisher | |
| Mutive | Developer | |
| Mutt Games | Developer | |
| MuuMuu | Developer | |
| Muutsch | Developer | |
| Muuush | Developer | |
| Muzt Die Studios | Developer | |
| Muzzy Lane | DeveloperPublisher | |
| Muzzz29 | Developer | |
| MvP Studios | Developer | |
| Mx Leno | Developer | |
| MxAshlynn | Developer | |
| Mxdara | Developer | |
| MxhxmxdIII | Developer | |