| AoQ | Developer | |
| Aolifu | Developer | |
| Aonekorigin | Developer | |
| Aoriradidjiu | Developer | |
| Aorn | DeveloperPublisher | |
| Aozoora | Developer | |
| Apache Software | DeveloperPublisher | |
| Apan? | Developer | |
| Apapappa | Developer | |
| Apartment 18 Productions | Developer | |
| Ape Egg Games | Developer | |
| Ape Tribe Games | Developer | |
| Ape, Inc. | Developer | |
| ApeHardware | Developer | |
| ApeMarina | Developer | |
| ApeStudio | Developer | |
| Apeiron | Developer | |
| Apell | Developer | |
| Apex Designs | Developer | |
| Aphrim_Games | Developer | |
| Apiven Studios | Developer | |
| Apocalips | Developer | |
| Apogee | Developer | |
| Apogee Software | DeveloperPublisher | |
| Apollo Technica | DeveloperPublisher | |
| Apollo'sBoy | Developer | |
| Apollo1955 | Developer | |
| Apollo5VR | Developer | |
| ApolloSoft | Developer | |
| Apollyon Steel | Developer | |
| Apooster | Developer | |
| Apothecary Studios | DeveloperPublisher | |
| AppRoarr Studios | Developer | |
| AppSir, Inc. | Developer | |
| Appaloosa Interactive | Developer | |
| Apparition Games | Developer | |
| Appci Corporation | Developer | |
| Appeal | Developer | |
| Appeal Studio | Developer | |
| Appeal Studios | Developer | |
| Appetizer Games | Developer | |
| Appi | Developer | |
| Applava | Developer | |
| Apple Advanced Technology Group | Developer | |
| Apple Cider | Developer | |
| Apple Computer | Publisher | |
| Apple Core | Publisher | |
| Apple Dash | Developer | |
| Apple Pie | DeveloperPublisher | |
| Apple0726 | Developer | |
| AppleBomb Games | Developer | |
| AppleFeetGaming | Developer | |
| AppleFruitGames | Developer | |
| AppleJacks | Developer | |
| ApplePieDev | Developer | |
| ApplecsoftGames | Developer | |
| Appleguysnake | Developer | |
| Appleman95 | Developer | |
| Applemunch Games | Developer | |
| ApplesToPears | Developer | |
| Application Systems | Publisher | |
| Application Systems Heidelberg | Developer | |
| Applied Computer Concepts | Publisher | |
| Applied Computing Services | Developer | |
| Applimazing | DeveloperPublisher | |
| Appnormals Team | Developer | |
| Appox | Developer | |
| AppsGears.com | Developer | |
| AppyArt | Developer | |
| Apricot | DeveloperPublisher | |
| ApricotWTF | Developer | |
| April Whitehead | Developer | |
| AprilB | Developer | |
| Aprinet | Developer | |
| Aprize Inc. | Developer | |
| Aprkot | Developer | |
| Apropos | Developer | |
| Apros | DeveloperPublisher | |
| Aps1s | Developer | |
| Apseren Industries | Developer | |
| Apt Games | DeveloperPublisher | |
| Apurv Verma | Developer | |
| Apus Software | DeveloperPublisher | |
| Aqarius | Developer | |
| Aqua Pacific | Developer | |
| Aqua Pacific Ltd. | Developer | |
| Aqua Plus | DeveloperPublisher | |
| Aqua Rouge | DeveloperPublisher | |
| Aqua Style | Developer | |
| Aqua Systems | DeveloperPublisher | |
| Aqua SystemsJP | Publisher | |
| AquaCentauri | Developer | |
| AquaDoesStuff | Developer | |
| AquaNoixl | Developer | |
| AquaPunk Projects | Developer | |
| Aqualuft Games | Developer | |
| Aquaplus | DeveloperPublisher | |
| Aquaria | Developer | |
| AquariusBat | Developer | |
| Aquasystem | DeveloperPublisher | |