DEVELOPERS
- A.I
- A-Max
- A-Wave
- A Wave Inc
- A1 Games / Success
- Aardvark Software
- Abalone
- Abel
- Absolute Entertainment
- Access
- Access / DLL
- Access Software
- Acclaim
- Acclaim Entertaiment
- Acclaim Studios
- Acclaim Studios Austin
- Acclaim Studios Cheltenham
- Acclaim Studios London
- Acclaim Studios Manchester
- Acclaim Studios Salt Lake City
- Acclaim Studios Salt Lake City, Inc
- Acclaim Studios Teeside
- Acclaim Studios Teesside, Ltd
- Accolade
- Accolade, Inc
- Acid
- ACME Interactive
- Acquire Corp
- Act Japan
- Acti-Art Corporation
- Active Enterprises
- Activision
- Adeline Software
- Adeline Software International
- ADK
- ADM
- Adrenalin Entertainment
- Adrenalin Interactive, Inc
- Advance Communication Company
- Advanced Productions
- Advanced Technology Group (Electronic Arts)
- Advancemmunicationmpany
- Affect
- Agatsuma Entertainment
- Agenda
- AI
- AIA
- AIC Spirits
- Aicom
- AIM
- Aim at Entertainment
- Aisystem Tokyo
- Ak tronic
- Aki Corp.
- AKI Corporation1
- Al Baker and Associates
- Alexandria
- Alfa System
- Alfa System / MARS Corporation
- Alfa System / MARS Corporation / Contrail
- Alice Blue
- Allumer
- Almanic Corp.
- Alpha Denshi
- Alpha System
- Alpha System / Movic
- Alpha Systems
- Alpha Unit
- Alphadream Corporation
- Alpine Studios
- Alten8
- Altron
- Altron Corporation
- Altron / Mere Mortals
- Alvion
- Alyume System
- Amachi / Infinity
- Amanodai / Graphic Research
- Amaze Entertainment
- Amazing Studios
- Amble
- Ambrella
- Amccus
- Amedio
- Amedio / D's Garage 21
- American Game Cartridges
- American Game Cartridges, Inc.
- American Sammy
- American Technos / Avit
- American Video Entertainment
- AMS
- Amtex
- Amusement & Multimedia Studio
- Amusement Vision
- Amuze
- Ancient
- Anco
- Anco Games
- Anco Software
- AndNow Interactive
- Angel
- Angel (Bandai)
- Angel Studios
- Another
- Antinos Records
- Any Channel
- Ape Studios
- Apex Designs
- Appaloosa
- Appaloosa Interactive
- Appaloosa Interactive Corp
- Aprinet
- Aqua Pacific
- Aqua Plus
- Aqua Rouge
- AquaSystem Co., Ltd
- Aques
- Arc Developments
- Arc Entertainment
- Arc Entertainment/Inti Creates
- Arc System Works
- Arc System Works Co
- Arcade Zone LTD
- Arcadia (Japan)
- Argent
- Argonaut Games
- Argonaut Software Ltd
- Ariadne
- Arika
- Aroma
- Arsys Software Inc.
- Art
- Art Co
- Art Co., Ltd
- Artdink
- Artdink Corporation
- Artech Digital Entertainment
- Artech Studios
- Artech Studios / Digital Eclipse
- Artificial Mind and Movement
- Artificial Mind and Movement (A2M)
- Artificial Mind & Movement
- Artificial Mind & Movement (A2M)
- Artoon
- Aruze Corp
- Ascaron
- Ascaron Entertaiment
- Ascii Corporation / Cosmo Games
- ASCII Entertaiment
- ASCII Entertainment
- Ascii Something Good Corporation
- ASK
- ASK Kodansha
- Asmik
- Asmik Ace Enterainment
- Asmik Ace Entertainment
- Asmik Ace Entertainment, Inc
- Aspect
- Aspyr
- Astec 21
- Astec21
- Astroll
- Astrovision
- Asuka Technologies
- Asylum Studios
- Atari
- Atari Games (Midway)
- Atelier Double
- Atelier Double / Millennium Kitchen
- Atelier-Sai
- Athena
- Atlus
- Atlus Co
- Atod AB
- Atomic Planet Entertainment
- Atreid Concept SA
- Attention To Detail Limited
- Audio Visual Magic
- Audiogenic
- Audiogenic Ltd.
- Avalanche Software
- Avalon Interactive
- Avion Corp
- Avit
- AWE Games
- Awesome Developments
- Awesome Productions
- Axela
- Axes Art Amuse