| Altered Matter | DeveloperPublisher | |
| Alterego Games | Developer | |
| Altergaze | Developer | |
| Alterisateur | Developer | |
| Alternative Software | DeveloperPublisher | |
| Alternative Software Ltd. | Publisher | |
| AltezaTFE | Developer | |
| Althi | DeveloperPublisher | |
| Altron | DeveloperPublisher | |
| Altron (JP) | Publisher | |
| Altron JP | Publisher | |
| AltronJP | Publisher | |
| Alucine Soft | Developer | |
| Alucine Software (Francisco Javier Perez Aguilera, Ricardo Perez Aguilera, Armando Garcia) | Developer | |
| Alukard9112 | Developer | |
| Alvar0gamer | Developer | |
| Alvaro Caceres | Developer | |
| Alvaro Luque | Developer | |
| Alvaro Marco | Developer | |
| Alvaro Mateos Herrera | Developer | |
| Alvaro Perez | Developer | |
| AlvaroVilla | Developer | |
| Alvarop | Developer | |
| Alvarop Games | Developer | |
| Alventia | Developer | |
| Alvian Eka | Developer | |
| Alvion | DeveloperPublisher | |
| Alyssa Williams | Developer | |
| AlyssonMax | Developer | |
| Alyx Jones | Developer | |
| Alzhar | Developer | |
| Am.Hyde | Developer | |
| Amaia Ruiz | Developer | |
| Amaka94 | Developer | |
| Amalie Kae | Developer | |
| Aman | Developer | |
| Amanda | Developer | |
| Amanda Hackbardt | Developer | |
| AmandaColer | Developer | |
| Amandhe | Developer | |
| Amanita Design | DeveloperPublisher | |
| Amaranthine | Developer | |
| Amarikwa | Developer | |
| Amaweks | Developer | |
| Amaze | Developer | |
| Amaze Entertainment | Developer | |
| AmazengGrace | Developer | |
| Amazing | DeveloperPublisher | |
| Amazing Games | Developer | |
| Amazing Media | Developer | |