| Adam | Developer | |
| Adam TideGear Milecki | Developer | |
| Adam Carriere (Pyjama Bottom Studios) | Developer | |
| Adam Clarke | Developer | |
| Adam Dixon | Developer | |
| Adam Foster | DeveloperPublisher | |
| Adam Freeman | Developer | |
| Adam Kehl | Developer | |
| Adam L. | Developer | |
| Adam Le Doux | Developer | |
| Adam Moore | Developer | |
| Adam Parker | Developer | |
| Adam Pedersen | Developer | |
| Adam Proctor | Developer | |
| Adam Roy | Developer | |
| Adam Saltsman | Developer | |
| Adam Silverstein | Developer | |
| Adam Stanchos | Developer | |
| Adam Tool | Developer | |
| Adam Waind | Developer | |
| Adam Waring | Developer | |
| Adam Weesner | Developer | |
| Adam Wom | Developer | |
| AdamAlexandr | Developer | |
| AdamBridge | Developer | |
| AdamGCurtis | Developer | |
| AdamKruschwitz | Developer | |
| AdamMahdi | Developer | |
| AdamMizell | Developer | |
| AdamMtts | Developer | |
| AdamStrange | Developer | |
| AdamZachoval | Developer | |
| Adamgryu | Developer | |
| AddaLine | Developer | |
| Addictive 247 Games | Developer | |
| Addictive Games | DeveloperPublisher | |
| Addictive Software | Publisher | |
| Addison-Wesley | Publisher | |
| Addison-Wesley Publishing Company | Publisher | |
| Addix Software | Developer | |
| AddoPlayz | Developer | |
| Adebreg | Developer | |
| Adeel_D | Developer | |
| AdelFaure | Developer | |
| Adela Kapuścińska | Developer | |
| Adeline | Developer | |
| Adeline Software | Developer | |
| Adeline Software International | Developer | |
| Aden | Developer | |
| Aden Webb | Developer | |