Group
- MEGA7
- MU Skulls14
- Mackenzie's Marauders9
- Madison Under Siege8
- Maille Man7
- Maki Roll5
- Maki Roll and Anja Keister1
- Mantic Entertainment Ltd35
- Mariucci J. Designs, LLC6
- Mark Suter and Steve Isaacs1
- Matsuricon1
- Matthew Mercer10
- Mavens1
- Mayday Games17
- Mayfair Games676
- MedievalCookery1
- MegaCon Games217
- Megacorp Games4
- Megathruster1
- Meridae Games, LLC6