DEVELOPERS
- M.N.M Software
- M2
- M2 / Studio Saizensen / Zero System
- M4 Limited
- Ma-Ba
- Magellan Interactive
- Magenta Software Ltd
- Magenta Software Ltd. / Traveller's Tales
- Magenta Systems
- Magic Pockets
- Magic Rings
- Magical
- Magical Company
- Magical Company LTD
- Magical Company (Mahou)
- Magifact
- Magnolia
- Magnolia (Korea Computer Center)
- Mahou
- Majesco Games
- Make
- Make Software
- Malibu
- Manic Media
- Manjyudo
- Manley and Associates
- Manley and Associates Inc.
- Map Japan
- Marble
- Marionette
- Marvelous
- Marvelous Interactive
- Masaya (NCS)
- Mass Media
- Masterpiece
- Masterpiece / Access
- Masterpiece / Isco
- Matrix Software
- Max Entertaiment
- Max Entertainment
- MaxBet
- MaxFive
- Maxis
- MBA International
- MBL Research
- Mebio Software
- Mecko
- Media Entertainment
- Media Factory
- Media Kite
- Media Rings
- Media Vision
- Media Vision Entertainment
- Media.Vision Entertainment / Contrail
- Media Works
- Mediamuse
- Mediamuse / Rythmics
- MediaWorks
- Mega Soft
- Megasoft (Japan)
- Mere Mortals
- Mere Mortals, Ltd
- Merit Studios
- Mermaid Studios
- Metro
- Metro 3D
- Metro3D
- Meyer Glass Interactive / Rainbow Studios
- Micott & Basara
- Micro Cabin
- Micro Factory
- Microids
- Micronet
- Micronics
- MicroProse
- Microprose / Digital Amusement
- MicroProse Software, Inc
- Micros
- Microsmiths Inc.
- Microvision
- Midas Interactive
- Midway
- Midway Home Entertainment
- Midway Home Entertainment/ Game Refuge
- Midway/Probe
- Midway Studios - San Diego
- Mig Entertainment
- Mighty Craft
- Millenium Interactive
- Millennium
- Millennium Interactive
- Millennium Interactive Ltd
- Million
- Milton Bradley
- Minakuchi Engineering
- Minato Giken
- Minds Eye
- Minds-Eye Productions
- Mindscape Inc.
- MindSpan
- MindSpan Technologies Corp
- Mint
- Mint / Plophet
- Miracle Designs
- Mirage
- Mirage Interactive
- Mirage Technologies (Multimedia) Ltd.
- Mirai Soft
- Mirrorsoft
- Mistic Software
- Mitchell
- Mitchell Corporation
- Mitsui & Co
- Mobile 21
- Mobius Entertainment
- Monolith
- Monolith (Japan)
- Morgen Studios
- Morning Star Multimedia
- MotiveTime, Ltd.
- Moulinsart Multimedia
- MTL
- MTO
- Mucky Foot
- Mud Duck Productions
- Multimedia Intelligence Transfer
- Musical Plan
- Musical Plan Ltd.
- Mutech
- Mycom
- MyCom (Mainichi Communications)