| ID | Name | Type |
|---|---|---|
| #10006 | Monitor | ? |
| #10007 | Monk Soft | Z |
| #18583 | MonkZy | - |
| #10008 | Mono Soft | Z |
| #10009 | Monolith | P |
| #10010 | Monrab | ? |
| #10011 | Monser S.A. | Z |
| #22008 | Monster | + |
| #10012 | Monster's Legs Productions | Z |
| #10013 | Monsterbytes | Z |
| #21611 | Monsters Productions | P |
| #10014 | Montanaro | ? |
| #10015 | Montevideo Uruguay | Z |
| #18141 | Monument Microgames | Z |
| #10016 | Moonchild Software | Z |
| #21964 | Moonmist Entertainment | P |
| #10017 | Moonsoft | Z |
| #10018 | Moonstone | Z |
| #10019 | Moonstone Computing | Z |
| #10020 | Moose | ? |