| 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 | |
| Arcadim | Developer | |
| Arcadonauts | Developer | |
| Arcan Studios | Developer | |
| Arcana Software | Publisher | |
| Arcana.Ai | Developer | |
| Arcanacra | Developer | |
| Arcane Four Studios | DeveloperPublisher | |
| Arcane Jello | Developer | |
| Arcane Kids | DeveloperPublisher | |
| Arcane Pixel Games | DeveloperPublisher | |
| ArcaneAria | Developer | |
| ArcaneRoboBrain | Developer | |
| Arcangelo Bonaparte | Developer | |
| Arcanity | DeveloperPublisher | |
| Arcanum Computing | DeveloperPublisher | |
| Arcanum Software Developments (Casey Bee Games, Rory C. Green, J. Dave Rogers) | Developer | |
| Arcextron | Developer | |
| Arch Rivals | Developer | |
| ArchBang | Developer | |
| ArchShiranui | Developer | |
| ArchVile games | Developer | |
| Archaic Bit | Developer | |
| Archdaimon | Developer | |
| Arche-san | Developer | |
| Archeia | Developer | |
| Archendrus | Developer | |
| Archer MacLean | Developer | |
| Archer McLean | Developer | |
| Archetype Interactive | Developer | |
| Archie_Golum | Developer | |
| Archimagus | Developer | |
| Archipelago | Developer | |
| Architect Enterprises | Developer | |
| Archon Interactive | Developer | |
| Archpray | Developer | |
| Archymede | Developer | |
| Arclight Creations | Developer | |
| Arco Iris | Developer | |
| Arctic Allosaurus | Developer | |
| Arctic Fox Games | Developer | |
| Arctic Studio | Developer | |
| ArcticCage | Developer | |
| Arcto Games | Developer | |
| Arcus | Developer | |
| Arcy | Developer | |
| Arda Gürcan | Developer | |
| ArdaGk | Developer | |
| Ardeimon | Developer | |
| Arden | Developer | |
| ArdenceVice | Developer | |