| Machinode | Developer | |
| MachoMuscles | Developer | |
| MaciWeather | Developer | |
| Maciej Bionicl Maj | Developer | |
| MaciejOsuch | Developer | |
| Mack | Developer | |
| Mackerel Interactive | Developer | |
| Macktimus | Developer | |
| Macmillan Digital Publishing | Publisher | |
| Macmillan Software | Publisher | |
| Macop | Developer | |
| Macoron | Developer | |
| Macrales Studio | Developer | |
| Macrocom Inc. | Publisher | |
| Macsen Software | Publisher | |
| Macshinen-Mensch | Developer | |
| Mad | DeveloperPublisher | |
| Mad Brokli | Developer | |
| Mad Catz | DeveloperPublisher | |
| Mad Catz Interactive | Publisher | |
| Mad CatzNA | Publisher | |
| Mad Cookies | Developer | |
| Mad Doc Software | Developer | |
| Mad Dog | Publisher | |
| Mad Dog Games | Publisher | |
| Mad Duck Productions | DeveloperPublisher | |
| Mad Fellows | Developer | |
| Mad Fellows Games | Developer | |
| Mad Gear Games | DeveloperPublisher | |
| Mad Genius Software | DeveloperPublisher | |
| Mad Hatter Software[11] | Publisher | |
| Mad J Studio | Developer | |
| Mad Katz | Publisher | |
| Mad Mimic | DeveloperPublisher | |
| Mad Mimic Interactive | DeveloperPublisher | |
| Mad Monkey | Developer | |
| Mad Monkey Games | Developer | |
| Mad Monkey Studio | Developer | |
| Mad Monster Games | Developer | |
| Mad Multimedia | Developer | |
| Mad Mushroom Games | Developer | |
| Mad Pangolin Games | Developer | |
| Mad Parrot Studios | Developer | |
| Mad monkey Studio | Developer | |
| MadBroxs | Developer | |
| MadDeviloper | Developer | |
| MadDuckGames | Developer | |
| MadFinn Development Co. | Developer | |
| MadGamesmith | Developer | |
| MadGearGames | Developer | |
| MadGnolas | Developer | |
| MadJubal | Developer | |
| MadLab | Developer | |
| MadManMeakin | Developer | |
| MadManPockets | Developer | |
| MadManToss | Developer | |
| MadMaxGames | Developer | |
| MadScientistGameStudio | Developer | |
| MadWallker | Developer | |
| MadWayDigital | Developer | |
| MadcoreTom | Developer | |
| Madcow | Developer | |
| Maddie Blue | Developer | |
| Maddiecorn | Developer | |
| Maddox Pratt | Developer | |
| Maddy Myers | Developer | |
| Maddy Sutton | Developer | |
| Made | DeveloperPublisher | |
| Made In Spain | Publisher | |
| Made On Mars | Developer | |
| Made by Liyi | Developer | |
| Made in Spain | Developer | |
| Made in Spain (Carlos Granados Martinez) | Developer | |
| Made in Spain (Fernando Rada Briega, Carlos Granados Martinez, Jorge Granados Martinez) | Developer | |
| Made in Spain (Jorge Granados Martinez) | Developer | |
| MadeByJawns | Developer | |
| MadeWithMonsterLove | Developer | |
| Madeleine Guinness | Developer | |
| Madfool | Developer | |
| Madgarden | Developer | |
| Madguy | Developer | |
| MadiTheImmortal | Developer | |
| Madikken | Developer | |
| Madison H | Developer | |
| Madison Rose | Developer | |
| Madison Scott-Clary | Developer | |
| Madjix Studio | Developer | |
| Madlab Software | Developer | |
| Madman Theory Games | Developer | |
| MadmanEpic | Developer | |
| Madmind Studio | Developer | |
| Madness Studio | Developer | |
| MadnessCODE | Developer | |
| Mado | Developer | |
| Madomation | Developer | |
| Madosoft | Developer | |
| Madpix Game Studio | Developer | |
| Madruga Works | DeveloperPublisher | |
| MadsBuchmann | Developer | |
| Madskramer | Developer | |