Group
- Ad Magic / Breaking Games1
- Ad Magic/Breaking Games63
- AdMagic124
- Adam Walker Film1
- Adam's Apple Games139
- Adam's Apple Games, LLC97
- Adamant Entertainment3
- Adas Games4
- Addicted to Pewter4
- Adept Press2
- Advance Primate Entertainment1
- Advanced Games8
- Advanced Primate Entertainment1
- Adventerra Games North America18
- Adventure Boys4
- Adventure Games of Escape and Suspense (A.G.E.S.)6
- Adventure Role Playing League23
- Adventure SMP1
- Adventure Scents3
- Adventures in Filbar14