A
| Ace of Aces | Artech Digital Entertainment | Sega | |
| Action Fighter | Sega | Sega | |
| Aerial Assault | Sega | Sega | |
| Alex Kidd: The Lost Stars | Sega | Sega | |
| Alex Kidd BMX Trial | Sega | Sega | |
| Alex Kidd in High-Tech World | Sega | Sega | |
| Alex Kidd in Miracle World | Sega | Sega | |
| Alex Kidd in Shinobi World | Sega | Sega | |
| Alien Syndrome | Sega | Sega | |
| Aquaduto | - | - | |
| Arqueiro | - | - | |
| Ataque dos Vermes | - | - | |
| Aventuras na Floresta | - | - | |
| Aztec Adventure: The Golden Road to Paradise (Nazca '88 in Japan) |
Sega | Sega |
Read more about this topic: List Of Tec Toy Master System 131 Games