| 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 | |
| Ardentsquid | Developer | |
| Ardoos | Developer | |
| Ardos | Developer | |
| Arduc | DeveloperPublisher | |
| Arduino kid | Developer | |
| Area Effect | Developer | |
| Area Zero | DeveloperPublisher | |
| Area35 | Developer | |
| Aredhele | Developer | |
| Arefnue | Developer | |
| Arekku | Developer | |
| ArenDev | Developer | |
| Arena | Publisher | |
| Arena Entertainment | Publisher | |
| Arena EntertainmentNA | Publisher | |
| Arena EntertainmentNA/EU | Publisher | |
| Arena EntertainmentNA/PAL | Publisher | |
| Arena of Kings | Developer | |
| ArenaNet | Developer | |
| Arewel | Developer | |
| Arga Váron | Developer | |
| Argent | DeveloperPublisher | |
| Argent Games | Developer | |
| ArgentJP | Publisher | |
| Argo Games | Developer | |
| Argonaut | Developer | |
| Argonaut Games | DeveloperPublisher | |
| Argonaut Software | DeveloperPublisher | |
| Argonaut Software Ltd. | Developer | |
| ArgondevilGuiderods | Developer | |
| ArgotBertha | Developer | |
| Argus Press Software | Publisher | |
| Argus Press Software (Ste L. Cork) | Developer | |
| Arhi | Developer | |
| Ari_I | Developer | |
| Aria | DeveloperPublisher | |
| Aria Mohebi | Developer | |
| Ariadna Álvarez | Developer | |
| ArialWicklund | Developer | |
| Arian Behfar | Developer | |
| Ariane Gomes | Developer | |
| Arido | Developer | |
| ArieSne | Developer | |
| Ariel Endaraues | Developer | |
| Ariel Gimenez | Developer | |
| Ariel Martínez Jacobson | Developer | |
| Aries | Developer | |
| Arietta of Spirits | Developer | |
| ArifAsaf | Developer | |
| ArifZ | Developer | |
| Arika | DeveloperPublisher | |
| ArikaJP | Publisher | |
| Arikado | Developer | |
| Arilbot | Developer | |
| Arin | Developer | |
| Ariolasoft | Publisher | |
| Arionlk | Developer | |
| Aristaeus890 | Developer | |
| Aristocrat Leisure | Developer | |
| Aristotle Software | Publisher | |
| AriusProductions | Developer | |
| Ariya | Developer | |
| Ariënne van Ee | Developer | |
| Arjan Brussee | Developer | |
| Arjun | Developer | |
| Ark Heiral | Developer | |
| Ark Multimedia Publishing | DeveloperPublisher | |
| Ark1ve | Developer | |
| Arkade | Developer | |
| Arkadium | Developer | |
| Arkagis | Developer | |
| Arkane Studios | Developer | |
| Arkania | Developer | |
| Arkann | Developer | |
| ArkarPhyo | Developer | |
| Arkbrik | Developer | |
| Arkedo Studio | Developer | |
| Arkham Products | DeveloperPublisher | |
| Arknoid | Developer | |
| Arknostik | Developer | |
| Arlasoft | Developer | |
| Arlay | Developer | |
| ArloFennekku | Developer | |
| Arlorean | Developer | |
| Arludus | Developer | |
| ArmadilloBros | Developer | |
| Armakono Games | Developer | |
| Armaldio | Developer | |
| ArmanDoesStuff | Developer | |
| Armand Preschutti | Developer | |
| Armanky | Developer | |
| Armanlone (Main) | Developer | |
| Armatelum Dev (J5 the Hyperforce) | Developer | |
| Armati Soft | Publisher | |
| Armature Studio | DeveloperPublisher | |
| Armed Gorilla | Developer | |
| Armel Gibson | Developer | |
| Armenia | Publisher | |
| Armin Unold | Developer | |
| Armo03 | Developer | |