Companies
- Marvel Games
- Marvel Studios
- Marvelous
- Marvelous Europe
- Marvelous, Inc.
- Massive Entertainment
- Massive Monster
- Matt Thorson
- Max Inferno
- Maximum Games
- Maxis
- Mechanistry
- Media Molecule
- Media Vision
- Mediatonic
- MegaCat Studios
- Mercury Steam Entertainment
- Merge Games
- Meridian4
- Messhof
- Meta
- Metanet Software
- Microids
- Microsoft
- Microsoft Studios