| ASC Games NA | Publisher | |
| ASC GamesNA | Publisher | |
| ASCARON Entertainment | DeveloperPublisher | |
| ASCII | DeveloperPublisher | |
| ASCII Coproation | Publisher | |
| ASCII Corporation | DeveloperPublisher | |
| ASCII Corporation JP | Publisher | |
| ASCII CorporationJP | Publisher | |
| ASCII Entertainment | DeveloperPublisher | |
| ASCII Entertainment (JP) | Publisher | |
| ASCII EntertainmentJP | Publisher | |
| ASCII EntertainmentNA | Publisher | |
| ASCII Media Works | DeveloperPublisher | |
| ASCII Software | DeveloperPublisher | |
| ASCII Something Good | Publisher | |
| ASECC | Developer | |
| ASH2 | Developer | |
| ASHGAMES | Publisher | |
| ASK | DeveloperPublisher | |
| ASK Co Ltd. | Developer | |
| ASK Homework | Developer | |
| ASK Kodansha | DeveloperPublisher | |
| ASK Kodansha JP | Publisher | |
| ASK-Kodansha | Developer | |
| ASKGAMES | Developer | |
| ASKJP | Publisher | |
| ASKJP Midas Interactive EntertainmentEU | Publisher | |
| ASM game world | Developer | |
| ASMB Games | Developer | |
| ASNetworks | Publisher | |
| ASSAKER | Developer | |
| ASanzL | Developer | |
| ASaunders | Developer | |
| ASecondGuy | Developer | |
| ASé…± | Developer | |
| ATA_Games | Developer | |
| ATJ | Developer | |
| ATLAS | Developer | |
| ATMOS | Developer | |
| ATP Projects | Developer | |
| ATTACK MOUNTAIN | Developer | |
| ATU | Developer | |
| ATalbi | Developer | |
| ATangTuanZi | Developer | |
| AToTaT_Admin | Developer | |
| AU: 505 Games | Publisher | |
| AU: Nintendo Australia | Publisher | |
| AU: Popcorn Arcade | Publisher | |
| AU: Take-Two Interactive | Publisher | |
| AU: Tradewest | Publisher | |