Companies Beginning With A
- A2M
- ACES Studio
- ACRONYM
- AGD Interactive
- AGEIA
- AGEOD
- ASC Games
- ATI
- AWE Games
- Abacus Publishers
- Acclaim Entertainment
- Accolade (Infogrames/Atari)
- Action Forms
- Activision
- Aeroplance Heaven
- Aion Development Team
- Airtight Games
- Akella
- Alawar Games
- Alientrap
- Altar Games
- Alten8
- Amanita Design
- Amaze Entertainment
- American Army
- Anarchy Enterprise
- Andreas Illiger
- Andrew Spencer Studios
- Angel Studios
- Animation Arts
- Appaloosa Interactive
- Aqua Pacific
- Arberth Studios
- Arc System Works
- Arcade Lab
- Area/code
- ArenaNet
- Argonaut Games
- Arkane Studios
- Arrowhead Studios
- Artech Studios
- Artefacts Studio
- Artematica Entertainment
- Artificial Studios
- Artoon
- Ascaron
- Asobo
- Aspyr Media
- Atari
- Atlus
- Atomic Motion
- Atomic Planet Entertainment
- Auran Software
- Autumn Moon Entertainment
- Avalanche Software
- Avalanche Studios
- Avalon Hill
- Avalon Style Entertainment