Companies
- MGM
- Microids
- Microprose
- Microsoft
- Microsoft Studios
- MidBoss
- Midnight City
- Midway
- Midway Newcastle
- Might and Delight AB
- Mighty Kingdom
- Mighty Rabbit Studios
- MiHoYo Limited
- Mika Mobile
- Mike Bithell
- Mike Singleton
- Milestone
- Mimimi Games
- Mind Candy
- Mindscape
- Mindware Studios
- Minor Key Games
- MintRocket
- Miramax
- Mistwalker
- Mob Entertainment
- Mobage
- Mobius Digital
- Mode 7 Games
- Modern Dream
- Modus Games
- Mohawk Games
- Mojang
- Mojo Bones
- Molasses Flood
- Mommy's Best Games
- Monolith
- Monolith Productions
- Monolith Soft
- Monomi Park
- Monte Cristo
- Montreal International Game Summit
- Monumental Games
- Moon Active
- Moon Studios
- Moonshark
- Moonshot Games
- Moss
- Mossmouth
- Most Wanted Entertainment