| Armonk Corporation | DeveloperPublisher | |
| Armor Games | Publisher | |
| Armor Games Studios | DeveloperPublisher | |
| Armor Project | Developer | |
| Armored Kiwi | Developer | |
| Armouredboar | Developer | |
| ArnarSkarnar | Developer | |
| ArnaudValensi | Developer | |
| Arnaut | Developer | |
| Arnie | Developer | |
| Arno Clabaugh | Developer | |
| Arno P. Gitz | Developer | |
| Arnoble | Developer | |
| Arnold Hendrick | Developer | |
| Arnowitz Studios | Developer | |
| Arokma | Developer | |
| Aroma | DeveloperPublisher | |
| Aroma Co., Ltd. | Publisher | |
| Aromarie | Developer | |
| Aron | Developer | |
| Aron Soos | Developer | |
| Arowx | Developer | |
| Arputikos | Developer | |
| ArrelHD | Developer | |
| Arrian | Developer | |
| Arrietty | Developer | |
| Arron Bates | Developer | |
| Arron Burch | Developer | |
| ArronBBO | Developer | |
| Arrow | Developer | |
| Arrow Games | Developer | |
| Arrow Micro-Techs | Publisher | |
| Arrow Micro-Techs Corp. | Publisher | |
| Arrowhead Game Studios | Developer | |
| Arrowhead Studios | Developer | |
| Arrowhead_Interactive | Developer | |
| ArsenalDevs | Developer | |
| Arsys Software | DeveloperPublisher | |
| Art | Developer | |
| Art & Magic | Publisher | |
| Art Co. Ltd. | Developer | |
| Art Co., Ltd | Developer | |
| Art Co., Ltd. | Developer | |
| Art Data Interactive | Developer | |
| Art Department | Publisher | |
| Art Department Werbeagentur GmbH | Developer | |
| Art Games Studio | DeveloperPublisher | |
| Art LaFrana | DeveloperPublisher | |
| Art Unfrozen | Developer | |
| Art in Heart | Developer | |