Companies
- MegaCat Studios
- Mercat Games
- Mercury Steam Entertainment
- Meridian4
- Meta
- Metanet Software
- Meteor Entertainment
- Microids
- Microprose
- Microsoft
- Microsoft Studios
- Midas Interactive Entertainment
- Midnight City
- Midnight Society
- Midway
- MiHoYo Limited
- Milestone
- Mimimi Games
- Mindscape
- Miniclip
- MintRocket
- Mobius Digital
- Mojang
- Monolith Productions
- Monomi Park