Group
- Margaret Weis1
- Mark Suter and Steve Isaacs1
- Marnicures1
- Mary Broussard1
- Mary Crowell1
- Mass Effect: Adventum1
- Massif Games1
- Masters of GM-Fu1
- Matrix Games1
- Matsuricon1
- Mattel Games1
- MayFair/ GB7.1
- Mayfair Gomes1
- MazeToons1
- McGaiHin Motor Sports1
- McGardin Motor Sports1
- McGarflin Motor Sports1
- Me, Myself and Die!1
- Medieval Cookery1
- Meeple Mountain1