Companies
- MachineGames
- MachineWorks Northwest
- Mad Doc Software
- Madison Karrh
- MAGES
- Maitan69
- Majesco Entertainment
- Majesco Europe
- Marvel
- Marvel Games
- Marvelous
- Marvelous AQL
- Marvelous Entertainment Inc.
- Marvelous Europe
- Marvelous, Inc.
- Mass Media Interactive Entertainment
- Massive Entertainment
- Massive Monster
- Mastertronic
- Matt Thorson
- Mattel
- Max Inferno
- Maximum Entertainment
- Maximum Games
- Maxis