Group
- Atlas Games169
- Atom Switch, Inc.34
- Atomic City Games4
- Atomic Game Theory1
- Atomic Mass Games84
- Atomic Mass Games 2
- Auburn University2
- Audio Dungeon1
- Austin Powers Agents12
- Australian Design Group4
- Autarch LLC1
- Author Garon Whited and Crispy Zombie1
- Author's Avenue Author - C.S. Marks1
- Avalon Games Company2
- Avalon Hill110
- AveMaster Gaming26
- Avenger Enterprises3
- Average Joe Racing League2
- Awkward Turkey LLC1
- Axis and Allies Member Club (AAMC)1