Group
- Melior Via8
- Mid-Hudson Gaming Geeks3
- Mike McDowell & Shaun Burris1
- Millennium Interactive Gaming1
- Mind Storm Labs49
- Mindtwister USA4
- Mini Painter, Ink17
- Miniatures Unlimited1
- Miskatonic Alumni Association1
- MojoGames1
- Mongoose Publishing4
- Monkey Business Institute2
- Moosetache Games53
- Morris-Butler House3
- Myrmidon Design Bureau4
- NASCRAG7
- NERO Chicago111
- NSDM13
- Namaste1
- Neil A. Wehneman, Attorney at Law1