| Asmik Corporation of America NA | Publisher | |
| Asmik JP | Publisher | |
| AsmikJP | Publisher | |
| Asmodee | DeveloperPublisher | |
| Asmodee Digital | DeveloperPublisher | |
| Asobi.tech | Developer | |
| Asobism | Developer | |
| Asobitai | Developer | |
| Asobo Studio | Developer | |
| Asobo Studios | Developer | |
| Asobox | Developer | |
| Aspaklaria Studios | Developer | |
| AsparagusOwl | Developer | |
| Aspect | DeveloperPublisher | |
| Aspect Co. | Developer | |
| Aspect Co., Ltd. | Developer | |
| Aspect11 | Developer | |
| AspectManufacture | Developer | |
| Asphelos | Developer | |
| Asphodel Quartet | Developer | |
| Aspyr | DeveloperPublisher | |
| Aspyr Media | DeveloperPublisher | |
| Aspyr Media, Inc.NA | Publisher | |
| Asraniel | Developer | |
| Asrmaiah | Developer | |
| Assemble Entertainment | Publisher | |
| Assembler Bot | Developer | |
| Assembly Line | DeveloperPublisher | |
| Assimby | Developer | |
| Assisted_Anarky | Developer | |
| AstLock | Developer | |
| Astar International Inc. | Publisher | |
| Astec 21 | DeveloperPublisher | |
| Aster | Developer | |
| Asteristic Game Studio | DeveloperPublisher | |
| Asteroid Base | DeveloperPublisher | |
| Asteroid-J | Developer | |
| Asterranaut | Developer | |
| Asthegor | Developer | |
| Astire Games | Developer | |
| Astonishing Animations (Colin Jones, Chris Graham, Keith Ross, Allister Brimble) | Developer | |
| Astorek86 | Developer | |
| Astr0s | Developer | |
| AstraLee | Developer | |
| Astragon | Publisher | |
| Astragon Entertainment | Publisher | |
| Astral Dingbat | Developer | |
| Astral Game Studio | Developer | |
| Astral Software | Developer | |
| AstralShift | Developer | |