| Adriano Gomes da Silva | Developer | |
| Adriano Silva | Developer | |
| Adriano Veríssimo | Developer | |
| Adridle | Developer | |
| Adrielus | Developer | |
| Adrien Poncet | Developer | |
| Adrián Bayardi | Developer | |
| Adrián Calvo | Developer | |
| Adrián Corbalán | Developer | |
| Adroit Conceptions | Developer | |
| Adtberp | Developer | |
| Adult Swim Games | Publisher | |
| Adure | Developer | |
| Adure Games | Developer | |
| Advance | Publisher | |
| Advance Communication Co. | Developer | |
| Advance Communication Company | Developer | |
| Advance Games | Developer | |
| Advance Reality Interactive | Developer | |
| Advance Software | Publisher | |
| Advanced Interactive Games | Publisher | |
| Advanced Productions | DeveloperPublisher | |
| Adventions | Publisher | |
| Adventuras AD | DeveloperPublisher | |
| Adventure International | DeveloperPublisher | |
| Adventure Islands | Developer | |
| Adventure Planning Service | Developer | |
| Adventure Productions | Developer | |
| Adventure Soft | DeveloperPublisher | |
| AdventureBit | Developer | |
| AdventureBox | Developer | |
| AdventureByte | Developer | |
| Adventurer32 | Developer | |
| Adventuron | Developer | |
| AdverDomina | Developer | |
| Ady Studios™ | Developer | |
| Adynod | Developer | |
| Aeclain | Developer | |
| Aedian Glair | Developer | |
| AedifexGames | Developer | |
| Aeg | Developer | |
| Aegis Interactive Entertainment | Publisher | |
| Aegix Drakan | Developer | |
| Aehersin | Developer | |
| Aekai | Developer | |
| Aekashics | Developer | |
| Aemetta | Developer | |
| Aemetta and toasteater | Developer | |
| Aemyn Connolly | Developer | |
| Aeon Electronic Entertainment | Developer | |
| Aeonsparx Interactive | Developer | |
| Aergia | Developer | |
| Aeria | Publisher | |
| Aeria Games | Publisher | |
| Aeria Games & Entertainment | Publisher | |
| Aeria Games and Entertainment | Publisher | |
| Aerkaos | Developer | |
| Aero | Developer | |
| Aero&Zero | Developer | |
| AeroChow | Developer | |
| Aeromangus | Developer | |
| Aeroska | Developer | |
| Aerosoft | DeveloperPublisher | |
| Aerow | Developer | |
| Aerton | Developer | |
| Aeryne Wright | Developer | |
| Aescosaurus | Developer | |
| Aesth | Developer | |
| Aesthetic | Developer | |
| Aesthetic Accidents Atelier | Developer | |
| Aesthetic Studio | Developer | |
| AestheticGamer | Developer | |
| Aeternuxolus | Developer | |
| Aether Interactive | Developer | |
| Aetherbyte Studios | Developer | |
| Aetheric Games | Developer | |
| Aevek | Developer | |
| Aevi | Developer | |
| Afal | Developer | |
| Afely | Developer | |
| Afendar | Developer | |
| Affable Games | DeveloperPublisher | |
| Affander | Developer | |
| Affect | DeveloperPublisher | |
| Affect Boom | Developer | |
| Affect Co., Ltd | Developer | |
| Affinity Archives | Developer | |
| Affinixy | Developer | |
| Afkar Media | Developer | |
| Afrochick | Developer | |
| Afrojoe123 | Developer | |
| After Apocalypse | Developer | |
| After Icarus | Developer | |
| AfterHoursGameDev | Developer | |
| Afterburn | Developer | |
| Afterburner Studios | DeveloperPublisher | |
| AfterglowGames | Developer | |
| Aftermath | Developer | |
| Afterthought Studios | Developer | |
| Again Again | Publisher | |