| Ash | Developer | |
| Ash Dague | Developer | |
| Ash K | Developer | |
| Ash is Attacking | Developer | |
| Ash's Channel | Developer | |
| AshFairburn | Developer | |
| AshG | Developer | |
| Ashar | Developer | |
| Ashara Studios | Developer | |
| Asharhussain | Developer | |
| Ashe | Developer | |
| Asheepun | Developer | |
| Asher Vollmer | Developer | |
| Ashes of a Noob | Developer | |
| Ashes.gamedevs | Developer | |
| Ashieda | Developer | |
| Ashiko124 | Developer | |
| AshitaMinami | Developer | |
| Ashk | Developer | |
| Ashkman | Developer | |
| Ashlander | Developer | |
| Ashley Jones | Developer | |
| Ashley Muir | Developer | |
| Ashley Pringle | Developer | |
| Ashminster Computing (Claude Sablatou, Chris Jones, Jonathan Medhurst, James Hartshorn, Nigel Kenward, William Byrd) | Developer | |
| Ashminster Computing (Jonathan Medhurst, Nigel Kenward) | Developer | |
| Ashminster Computing (Roger Taylor) Stefan Ufnowski | Developer | |
| Ashore | Developer | |
| AshtheMan | Developer | |
| Ashwin Kamath | Developer | |
| Ashwin Mods | Developer | |
| Asi Epshtain | Developer | |
| Asia Eastern | Publisher | |
| Asiard Games | Developer | |
| Asiasoft Online | Publisher | |
| Asif G. | Developer | |
| Asigila | Developer | |
| Asim | Developer | |
| Ask An Enemy Studios | DeveloperPublisher | |
| Ask Koudansha | Publisher | |
| Askiisoft | Developer | |
| Asli_Tumerkan | Developer | |
| Asmik | Publisher | |
| Asmik Ace | DeveloperPublisher | |
| Asmik Ace Entertainment | DeveloperPublisher | |
| Asmik Ace Entertainment JP | Publisher | |
| Asmik Ace Entertainment NA | Publisher | |
| Asmik Ace Entertainment, Inc | DeveloperPublisher | |
| Asmik Ace EntertainmentJP | Publisher | |
| Asmik AceJP | Publisher | |
| 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 | |
| Astralore | Developer | |
| Astrid Dalmady | Developer | |
| Astridelta | Developer | |
| Astro | Developer | |
| Astro Lords Dev | Developer | |
| Astro Port | Developer | |
| Astro1 | Developer | |
| AstroBearGames | Developer | |
| AstroLabe | Developer | |
| AstroSocks | Developer | |
| Astrogun | Developer | |
| Astroillogica | Developer | |
| Astrojone | Developer | |
| Astroll | DeveloperPublisher | |
| AstrollJP | Publisher | |
| Astronation | Developer | |
| Astronaut Curve | Developer | |
| Astronauts | DeveloperPublisher | |
| Astronautz | Developer | |
| Astrophobia | Developer | |
| Astros Productions | DeveloperPublisher | |
| Astros Productions (Peter Karboulonis, George Karboulonis) | Developer | |
| Astrosaurus Games | DeveloperPublisher | |
| Astrovision | Developer | |
| Astucia | Developer | |
| Astus Games | Developer | |
| AstuteOne | Developer | |
| Asue | Developer | |
| Asuka Technologies | Developer | |
| Asuro | Developer | |
| Asylum Entertainment | DeveloperPublisher | |
| Asylum Square | Developer | |
| Asylum Square Interactive | Publisher | |
| Asylum studios | Developer | |
| AsylumSquad | Developer | |
| Asymetrical Pigeon | Developer | |
| Asymmetric Publications | DeveloperPublisher | |
| Asynchron | Developer | |
| AtKombi | Developer | |
| Ata Dogan | Developer | |
| Atapki | Developer | |
| Atara Gracia | Developer | |
| Atari | DeveloperPublisher | |
| Atari (Infogrames) | Publisher | |
| Atari (Infrogames) | Publisher | |
| Atari (NA) | Publisher | |
| Atari (Overseas) | Publisher | |
| Atari 2600 Land | Publisher | |
| Atari Corp. | Publisher | |
| Atari Corporation | DeveloperPublisher | |
| Atari Europe | Publisher | |
| Atari Europe S.A.S.U. | Publisher | |
| Atari Games | DeveloperPublisher | |
| Atari Hunt Valley | Developer | |
| Atari Interactive | Publisher | |
| Atari NA | Publisher | |
| Atari SA | Publisher | |
| Atari, Inc. | DeveloperPublisher | |
| Atari, Inc.KO,NA,PAL | Publisher | |
| AtariAU | Publisher | |
| AtariAU,NA | Publisher | |
| AtariAge | Publisher | |
| AtariEU | Publisher | |
| AtariKafa | Developer | |
| AtariNA | Publisher | |
| AtariNA,PAL | Publisher | |
| AtariPAL | Publisher | |
| Atarisoft | DeveloperPublisher | |
| Ataro | Publisher | |
| Atelier Double | Developer | |
| Atelier Garbage | Developer | |
| Atelier Mimina | Developer | |
| Atelier Sentô | Developer | |
| Atelier-Sai | DeveloperPublisher | |
| Ateliér Duchů | Developer | |
| Atemly Games | Developer | |
| Atent Games | Publisher | |
| Atezai | Developer | |
| Athakaspen | Developer | |
| Athena | DeveloperPublisher | |
| Athena Co. | Publisher | |
| Athena Hollow | Developer | |
| Athena JP | Publisher | |
| AthenaJP | Publisher | |
| AthenaParadigm | Developer | |
| Athletic Design AB | Developer | |
| Aticora_Games | Developer | |
| Atium Addict | Developer | |
| Atiya Nova | Developer | |
| Atlach | Developer | |
| Atlantean Interactive | Publisher | |
| Atlantean Interactive Games | Publisher | |
| Atlantis Interactive Entertainment | Developer | |
| Atlantis Software | Publisher | |
| AtlasAndCo | Developer | |
| AtlasDev | Developer | |
| Atlingworth | Developer | |
| Atlus | DeveloperPublisher | |
| Atlus (NA) | Publisher | |
| Atlus Co. | DeveloperPublisher | |