Group
- MechJock.Com80
- Media Blasters25
- MedievalCookery.com1
- Mercury Men Pictures LLC2
- Mid-Hudson Valley Gaming Geeks3
- Milwaukee Magi-Nation League1
- Mind Storm Labs26
- Miskatonic Alumni Association1
- MojoGames3
- Mongoose Publishing9
- Monte Cook1
- NASCRAG7
- NERO36
- NSDM, Inc.14
- New Age Productions and Events1
- New Moon Festival1
- NikRoberts Media1
- Ninja Magic, LLC4
- North Star Games5
- Northern Virginia Gamers (NOVAG)8