| Title | Games |
 | A2M Montreal, QC Canada | 2 |
 | Acclaim Studios Austin, Texas | 0 |
 | Activision Santa Monica CA | 41 |
 | Adrenium Games Location Unknown | 0 |
 | Akella Russia | 1 |
 | Aki Corp Location Unknown | 0 |
 | Atari Inc Location Unknown | 8 |
 | Argonaut Games London UK | 0 |
 | Avalanche Software Salt Lake City, Utah | 8 |
 | Acclaim Entertainment Location Unknown | 0 |
 | Amaze Entertainment Location Unknown | 1 |
 | Amusement Vision Location Unknown | 0 |
 | Amuze Stockholm, Sweden | 0 |
 | Anchor Japan | 0 |
 | Andamiro Entertainment Seoul, Korea | 0 |
 | Angel Studios Location Unknown | 0 |
 | Appaloosa Interactive Location Unknown | 0 |
 | Arc Systems Austin, Texas | 1 |
 | Arkane Studios Location Unknown | 4 |
 | Artech Studios Location Unknown | 3 |
 | Artoon Co Japan | 1 |
 | Asobo Studios Bordeaux, France | 1 |
 | Asylum Entertainment London, UK | 0 |
 | Atlus Software Irvine, CA | 6 |
 | Atomic Planet UK | 0 |
 | Awesome Studios Location Unknown | 0 |
 | Aquire Japan | 1 |
 | AQ Interactive Japan | 1 |
 | artdink Location Unknown | 0 |
 | Artdink Tsukishima, Tokyo | 1 |
 | Alchemic Productions Location Unknown | 0 |
 | ArcSystemWorks Co. Location Unknown | 3 |
 | Alpha System Location Unknown | 0 |
 | Artificial Mind Location Unknown | 2 |
 | Autonomous Productions Location Unknown | 0 |
 | Atomic Elbow Sweden | 1 |
 | A.C.R.O.N.Y.M. Games Inc. Location Unknown | 1 |
 | Alfa System Location Unknown | 1 |
 | Artificial Studios Location Unknown | 2 |
 | Airtight Games Location Unknown | 3 |
 | Access Games Location Unknown | 2 |
 | Arika Location Unknown | 1 |
 | Ascaron Ent. GmbH Location Unknown | 1 |
 | Archor Games Location Unknown | 1 |
 | Arrogancy games Location Unknown | 2 |
 | Ankama Games Location Unknown | 1 |
 | Antab Location Unknown | 1 |
 | arcarocket Location Unknown | 2 |
 | Absobo Studio Location Unknown | 1 |
 | Atomic Games Location Unknown | 2 |
 | Aaron Ramsey Location Unknown | 1 |
 | Arc System Works Location Unknown | 6 |
 | Angelo Pelini Location Unknown | 1 |
 | Angel Location Unknown | 1 |
 | Adrenalin Location Unknown | 0 |
 | Atomic Motion Location Unknown | 1 |
 | Aspyr Location Unknown | 1 |
 | Agent MOO Location Unknown | 1 |
 | ACE Location Unknown | 2 |
 | ASuperSonic Location Unknown | 1 |
 | ACRONYM Location Unknown | 1 |
 | Arkedo Location Unknown | 5 |
 | Azubi Location Unknown | 1 |
 | Aztec Location Unknown | 1 |
 | AxB Location Unknown | 1 |
 | AlMra Location Unknown | 1 |
 | Acony Games Location Unknown | 1 |
 | Asobo Studio Location Unknown | 5 |
 | Alaware Entertainment Location Unknown | 1 |
 | ACQUIRE Corp. Location Unknown | 2 |
 | Apex Systems Location Unknown | 1 |
 | A-Steroids Location Unknown | 1 |
 | Armature Studio Location Unknown | 1 |
 | Arkadium Location Unknown | 4 |
 | ACE Team Location Unknown | 1 |
 | Anuman Interactive Location Unknown | 3 |
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