| Publisher | Publications |
|---|---|
| MAGE Company | 3 |
| Man O'Kent Games | 2 |
| Manzakk Publishing | 1 |
| Matagot | 1 |
| Mayfair Games | 1 |
| Mersey Leisure Publishing | 7 |
| Micro RPG | 7 |
| Midlam Miniatures | 1 |
| minimalGames | 1 |
| Miskatonic River Press | 17 |
| Moaideas Game Design | 1 |
| Modest Games | 1 |
| Modiphius | 1 |
| Modiphius Entertainment | 46 |
| Mr B Games | 1 |