| Amaze Entertainment |
| Amusement Visions |
| Amuze |
| Anchor |
| Angel Studios |
| Anim-X |
| Antagonist |
| Apeiron |
| Appaloosa Interactive |
| AQ Interactive |
| Aquaplus |
| Arberth Studios |
| ARC Entertainment |
| Arc System Works |
| Arcade Moon |
| ArenaNet |
| Argonaut |
| Arkane Studios |
| Arkedo Studio |
| Armature Games |
| Artech Studios |
| Artematica Digital Arts |
| ArtePiazza |
| Artificial Mind and Movement |
| Artificial Studios |
| Artoon |
| ARUSH Entertainment |
| Arxel Tribe |
| Arzest |
| Ascaron |
| Asobo Studio |
| Aspyr |
| Asylum Entertainment |
| Atari |
| Aterdux Entertainment |
| Atlus |
| Atomic Elbow |
| Atomic Motion |
| Atomic Planet |
| Auran |
| Australian Design Group |
| Autumn Games |
| Avalanche Software |
| Avalanche Studios |
| Avanquest |
| AWE Games |
| Backbone Entertainment |
| Bam! Entertainment |
| Bamtang |
| Bandai |
| Banpresto |
| BattleBorne Entertainment |
| Battlefront.com |
| BattleGoat Studios |
| Beenox Studios |
| Beep Industries |
| Behaviour Interactive |
| Behold Studios |
| Bemani Fever |
| Best Way |
