| Name | Types | |
|---|---|---|
| Mechabit | DeveloperPublisher | |
| Mechanic Arms | Developer | |
| Mechanical Head Studios | Developer | |
| MechanicsDriven | Developer | |
| Mechaspear Studios | Developer | |
| Mecinkari | Developer | |
| Mecko | DeveloperPublisher | |
| Med | Developer | |
| Med Systems | Publisher | |
| Med Systems Software | Publisher | |
| MedYaya | Developer | |
| Medalist International | Publisher | |
| Medallion Software | Publisher | |
| MediGuy | Developer | |
| Media 5 | DeveloperPublisher | |
| Media Art | Developer | |
| Media Entertainment | DeveloperPublisher | |
| Media Factory | DeveloperPublisher | |
| Media FactoryJP | Publisher | |
| Media Gallop | Developer | |
| Media Group | Publisher | |
| Media Kings | DeveloperPublisher | |
| Media Kite | Publisher | |
| Media KiteJP | Publisher | |
| Media Molecule | Developer | |
| Media Quest | Publisher | |
| Media Rings | DeveloperPublisher | |
| Media RingsJP | Publisher | |
| Media Sales & Licensing | DeveloperPublisher | |
| Media Vision | Developer | |
| Media Works | DeveloperPublisher | |
| Media.Vision | Developer | |
| Media5 | DeveloperPublisher | |
| MediaKite | DeveloperPublisher | |
| MediaQuest | DeveloperPublisher | |
| MediaWorks | DeveloperPublisher | |
| MediaWorks, Inc. | DeveloperPublisher | |
| Mediagenic | Publisher | |
| Mediagogo | DeveloperPublisher | |
| Mediamond Tmi | Publisher | |
| Mediamuse | Developer | |
| Mediarium | Developer | |
| Mediascape | Publisher | |
| Mediatech Game Studio | Developer | |
| Mediatonic | Developer | |
| Mediax | DeveloperPublisher | |
| Mediax Co., Ltd. | Developer | |
| MedicOnDuty | Developer | |
| MediocreMonty | Developer | |
| Medioza | DeveloperPublisher |