| Millennium Media Group | Developer | |
| Millimedia Games | Developer | |
| Million | Developer | |
| Million Co., Ltd. | Developer | |
| Million Corp. | Developer | |
| Millo Games | DeveloperPublisher | |
| Mills1 | Developer | |
| Milo Games | Developer | |
| Milo Smiley | Developer | |
| MiloMyth | Developer | |
| MiloSoft | Developer | |
| Miloush | Developer | |
| Milrock15 | Developer | |
| Miltage | Developer | |
| Milton Bradley Company | Publisher | |
| Mily | Developer | |
| Mimi Chiu | Developer | |
| Mimic | Developer | |
| Mimimi Games | Developer | |
| Mimimi Productions | Developer | |
| MimmoO | Developer | |
| MimounKECHE | Developer | |
| Min Communications | DeveloperPublisher | |
| Min Lii | Developer | |
| MinaKhalil | Developer | |
| Minakuchi Engineering | Developer | |
| Minato Giken | Developer | |
| Minato Soft | DeveloperPublisher | |
| Minato Station | DeveloperPublisher | |
| Minatojc | Developer | |
| Minavas | Developer | |
| Mind Candy | Developer | |
| Mind Control Software | Developer | |
| Mind Echoes | Developer | |
| Mind Games | Publisher | |
| Mind Games España | DeveloperPublisher | |
| Mind Games Software | Publisher | |
| Mind Palace | Developer | |
| Mind Shear Software | Developer | |
| Mind's Eye | Developer | |
| Mind's Eye Games | DeveloperPublisher | |
| Mind's Eye Productions | Developer | |
| Mind's Eye Software | Developer | |
| Mind's Eye Software (Jim Gardner) | Developer | |
| Mind's Eye Software (Jim Gardner, David Whittaker) | Developer | |
| Mind's Eye Software (Jim Gardner, Julian Wood, J. Dave Rogers) | Developer | |
| Mind's Eye Software (Matt Furniss) | Developer | |
| MindArk | DeveloperPublisher | |
| MindFuse Games | DeveloperPublisher | |
| MindGames Entertainment | Developer | |