| Manic Media | Developer | |
| Manic Media Productions | Developer | |
| Manifesto Games | Publisher | |
| Manik Sinha | Developer | |
| Manikin Games | Developer | |
| Manipolar | Developer | |
| ManishBH | Developer | |
| Manley & Associates | Developer | |
| Manley and Associates | Developer | |
| Manley and Associates, Inc. | Developer | |
| Manlibear | Developer | |
| Manoel Castro | Developer | |
| ManofPixels | Developer | |
| Manolo Studios | Developer | |
| Manos Agianniotakis | Developer | |
| Manpacman | Developer | |
| Manpos | Developer | |
| MansterSoft | Developer | |
| Mantalice | Developer | |
| MantasButkus | Developer | |
| Mantis-Eye Labs | Developer | |
| Mantra | Developer | |
| Manu | Developer | |
| ManuACruz | Developer | |
| ManuCoder | Developer | |
| ManuEcheveste | Developer | |
| ManuElemental | Developer | |
| ManuGamesDev | Developer | |
| ManuGamingCreations | Developer | |
| Manuel Cubedo | Developer | |
| Manuel Estévez | Developer | |
| Manuel Rauber | Developer | |
| Manuel Sagra | Developer | |
| Manuel-2 | Developer | |
| Manufacture 43 | DeveloperPublisher | |
| Manurocker95 | Developer | |
| Manus | Developer | |
| Manwe23 | Developer | |
| Manyk | Developer | |
| ManzorS | Developer | |
| MaoItsMe | Developer | |
| Maou Zenigame | Developer | |
| Map Japan | DeveloperPublisher | |
| MapacheAgridulce | Developer | |
| Maple | Developer | |
| Maple Powered Games | Developer | |
| MapleMill | Developer | |
| MapleScot Development | Developer | |
| Mapledev | Developer | |
| Maquisard | Developer | |
| Mar Entertainment (Jose Manuel Alvarez, Manuel Matamoros, Juan Carlos Sanchez Alvarez) | Developer | |
| Mar'z Project | Publisher | |
| MarTCM | Developer | |
| MarWinStudios | Developer | |
| Marafrass | Developer | |
| Marama | Developer | |
| Maranara | Developer | |
| Marangon Productions | Developer | |
| Marasmusine | Developer | |
| MaratG2 | Developer | |
| Marav Stress | Developer | |
| MarbinSpectrum | Developer | |
| Marble | DeveloperPublisher | |
| Marc Arroyo | Developer | |
| Marc Blank | Developer | |
| Marc Goodman (as "Mangrove Earthshoe") | Developer | |
| Marc Gálvez | Developer | |
| Marc Jones | Developer | |
| Marc Romera Rodriguez | Developer | |
| Marc Serra | Developer | |
| Marc Steene | Developer | |
| MarcWerk | Developer | |
| Marcel Fischer | Developer | |
| Marcel Stocker | Developer | |
| Marcel Weyers | DeveloperPublisher | |
| MarcelSG | Developer | |
| MarcelinoB0rges | Developer | |
| Marcelo Chaves | Developer | |
| Marcelo Gomes | Developer | |
| Marcelo Miyazaki | Developer | |
| Marcelo Rigon | Developer | |
| Marcelod2 | Developer | |
| Marcial Lincoln | Developer | |
| Marcin Siwek | Developer | |
| Marck_Ello | Developer | |
| Marco Amadei | Developer | |
| Marco Bianchi | Developer | |
| Marco Cafe | Developer | |
| Marco Duroe | Developer | |
| Marco Giorgini | Developer | |
| Marco Marmolejos | Developer | |
| Marco Moroni | Developer | |
| Marco Paulo Carrasco | Developer | |
| Marco Stano | Developer | |
| Marco Zavaroni | Developer | |
| Marco98 | Developer | |
| MarcoElz | Developer | |
| MarcoR | Developer | |
| Marco_Massa_Dev | Developer | |
| Marcopole | Developer | |
| Marcos Abreu | Developer | |
| Marcos Dobrowolski | Developer | |
| Marcos Donnantuoni | Developer | |
| Marcos Fuchter | Developer | |
| Marcos Jouron | Developer | |
| Marcos Jouron Berzosa | Developer | |
| MarcosTorresLechuga | Developer | |
| Marcotte173 | Developer | |
| Marcus | Developer | |
| Marcus Karåker | Developer | |
| Marcus0410 | Developer | |
| Marcuss2 | Developer | |
| MarechalBanane | Developer | |
| Marek Kapolka | Developer | |
| Margaret J. Ganzberger | Developer | |
| Margaret | Wanted Raccoon | Developer | |
| Margarita Ganeva | Developer | |
| Margaux Gautherin | Developer | |
| Marginal Act | Developer | |
| MarginalAct | Developer | |
| MargotLsdgt | Developer | |
| Mari | Developer | |
| Mari95 | Developer | |
| MariLuzaria | Developer | |
| Maria Catarina | Developer | |
| Maria Deslis | Developer | |
| Maria Ferreri | Developer | |
| Maria Mison | Developer | |
| Marialuzc | Developer | |
| Mariana Maia Lomelino | Developer | |
| Mariana Amorim | Developer | |
| Marianne Vieulès | Developer | |
| Maribor | Developer | |
| Marie Abrino | Developer | |
| Marie Mayer | Developer | |
| Marie Vardal | Developer | |
| Marigul | Developer | |
| Marigul Management | Developer | |
| Marika | Developer | |
| Marilyn Roxie | Developer | |
| Marina Díez | Developer | |
| Marina Kittaka | Developer | |
| MarinaTelles | Developer | |
| Marine Dateologists | Developer | |
| Marine Millot | Developer | |
| Marinelli Julien | Developer | |
| Marino999 | Developer | |
| Mario 'MarioKness' Torrisi | Developer | |
| Mario Barone | Developer | |
| Mario Donick | Developer | |