| AM1
| http://www.wow-ent.co.jp/
|
| Ark Shell
| http://www.unicorn-a.com/arkshell/
|
| Anim
| http://www.sis.iowave.co.jp/anim/anim.html
|
| AM Annex
| http://www.sega.com
|
| Amusement Vision
| http://www.sega.com
|
| AM7
| http://www.sega.com
|
| AM3
| http://www.sega.com
|
| AM2
| http://www.sega-am2.co.jp/
|
| Adeline Software
| http://www.nocliche.com
|
| Adventure International
| http://www.msadams.com/index.htm
|
| Antique
| http://www.moon-parrot.com/antique/
|
| Aqnos
| http://www.jam-creation.co.jp/aqnos/main.html
|
| Awesome Studios
| http://www.awesomestudios.com
|
| Awesome Developments
| http://www.awesome.uk.com
|
| Avaria Corp
| http://www.avaria.com
|
| Avalon Hill
| http://www.avalonhill.com
|
| Avalanche Software
| http://www.avalanchesoftware.com/
|
| Audio Motion
| http://www.audiomotion.com
|
| Atomic Planet
| http://www.atomic-planet.com
|
| Atod AB
| http://www.atod.se
|
| Atlus Software
| http://www.atlus.com
|
| Attention to Detail
| http://www.atd.co.uk
|
| Atari
| http://www.atari.com
|
| Asylum Entertainment
| http://www.asylum-entertainment.com
|
| Aspyr
| http://www.aspyr.com
|
| Asmik Ace Entertainment
| http://www.asmik-ace.co.jp/
|
| ASK
| http://www.ask-digital.co.jp/
|
| ASCII
| http://www.ascii.co.jp/english/
|
| ASC Games
| http://www.ascgames.com
|
| Arxel Tribe
| http://www.arxeltribe.com/
|
| ArtSource Studios
| http://www.artsource.com
|
| Artoon
| http://www.artoon.co.jp/
|
| Artech Studios
| http://www.artechstudios.com
|
| ArtDink
| http://www.artdink.com/
|
| Arika
| http://www.arika.co.jp
|
| Argonaut Games
| http://www.argonaut.com
|
| Arc System Works
| http://www.arcsy.co.jp/
|
| Aqua Pacific
| http://www.aqua-pacific.com
|
| Absolute Quality Inc.
| http://www.aqinc.com/
|
| Apple
| http://www.apple.com
|
| Appaloosa Interactive
| http://www.appaloosacorp.com
|
| Apogee
| http://www.apogee1.com
|
| Aoni Production
| http://www.aoni.co.jp
|
| American Softworks
| http://www.anonymous1.com/ascgames/index.html
|
| Angel Studios
| http://www.angelstudios.com
|
| AndNow
| http://www.andnow.net
|
| Anchor Inc.
| http://www.anchorinc.co.jp
|
| Amuze
| http://www.amuze.com
|
| Alice Soft
| http://www.alicesoft.co.jp/
|
| Alfa System
| http://www.alfasystem.net/
|