DEVELOPERS
- M.N.M Software
- M2
- M4 Limited
- Ma-Ba
- Magellan Interactive
- Magic Pockets
- Magic Rings
- Magical Company (Mahou)
- Magifact
- Majesco Games
- Make
- Malibu
- Manjyudo
- Manley and Associates
- Manley and Associates Inc.
- Marionette
- Marvelous
- Mass Media
- Max Entertainment
- Maxis
- MBL Research
- Mebio Software
- Media Factory
- Media Kite
- Media Rings
- Mega Soft
- Megasoft (Japan)
- Merit Studios
- Mermaid Studios
- Metro
- Metro3D
- Micott & Basara
- Micro Cabin
- Micro Factory
- Microids
- Micronet
- Micronics
- MicroProse
- Micros
- Microsmiths Inc.
- Midway
- Midway Studios - San Diego
- Mig Entertainment
- Mighty Craft
- Millenium Interactive
- Millennium
- Millennium Interactive
- Million
- Milton Bradley
- Minakuchi Engineering
- Minato Giken
- Minds-Eye Productions
- Mindscape Inc.
- MindSpan
- Mint
- Mirage
- Mirrorsoft
- Mistic Software
- Mitchell
- Mobile 21
- Mobius Entertainment
- Monolith
- Monolith (Japan)
- Morgen Studios
- Morning Star Multimedia
- MotiveTime, Ltd.
- MTL
- MTO
- Multimedia Intelligence Transfer
- Musical Plan
- Musical Plan Ltd.
- Mutech