| Aques | DeveloperPublisher | |
| Aquiris Game Studio | DeveloperPublisher | |
| Aquiris Studio | DeveloperPublisher | |
| Aquma | Developer | |
| Aquria | Developer | |
| ArT-Rex | Developer | |
| Arabong | Developer | |
| Arachnibot | Developer | |
| Arachnid Games | Developer | |
| Aragatodag | Developer | |
| Aral Ithalat | Publisher | |
| AramSerobyan | Developer | |
| Aramilion | Developer | |
| Aran | Developer | |
| Aran Timon | Developer | |
| Araneum Studio | Developer | |
| ArantxaStudio | Developer | |
| Arara Dev | Developer | |
| AraratFM | Developer | |
| Arastu Tamboli | Developer | |
| Aravien | Developer | |
| Arbelos Interactive | DeveloperPublisher | |
| Arberth Studios | Developer | |
| Arbigaus | Developer | |
| ArbitraryMetric | Developer | |
| Arbor Interactive | Developer | |
| Arbosis | Developer | |
| Arc Developers | Developer | |
| Arc Developments | Developer | |
| Arc Developments (Byron Nilsson, Paul Walker, Jonathan Dunn) | Developer | |
| Arc Entertainment | Developer | |
| Arc System Works | DeveloperPublisher | |
| Arc System WorksJP | Publisher | |
| Arc System WorksNA | Publisher | |
| ArcAid | Developer | |
| ArcForged | Developer | |
| Arc_Games_1 | Developer | |
| Arcade Distillery | DeveloperPublisher | |
| Arcade Masters | Developer | |
| Arcade Moon | Developer | |
| Arcade Software | Publisher | |
| Arcade Zone | Developer | |
| Arcadia | Developer | |
| Arcadia Soft | DeveloperPublisher | |
| Arcadia Soft (Jose Miguel Saiz, Manuel Rosas, Jose Antonio Carrera Merino) | Developer | |
| Arcadia Software | DeveloperPublisher | |
| Arcadia Systems | DeveloperPublisher | |
| Arcadia Systems NA | Publisher | |
| ArcadiaXR | Developer | |
| Arcadiax | Developer | |