| Advanced Military Commander IV | Advanced Daisenryaku IV | SEGA | 21 August 2003 | Strategy | PC | N | N | N | N |
| Advanced Military Commander V | Advanced Daisenryaku V | SEGA | 29 June 2006 | Strategy | PC | N | N | Y | N |
| Adventure | No Alternate Title | Atari Inc. | 1979 | Adventure | 2600 | Y | Y | N | N |
| Adventure Island II | Takahashi Meijin no Bouken Jima II; The Adventure Island Part II | Hudson | February 1991 | Action > Platformer | NES | N | N | Y | N |
| Adventure Island III | Takahashi Meijin no Bouken Jima III | Hudson | 31 July 1992 | Action > Platformer | NES | N | Y | N | Y |
| Adventures of Lolo | No Alternate Title | HAL Laboratory | April 1989 | Puzzle | NES | N | Y | N | Y |
| Adventures of Lolo 2 | Adventures of Lolo (Japan) | HAL Laboratory | 06 January 1990 | Puzzle | NES | N | Y | N | Y |
| Adventures of Lolo 3 | Adventures of Lolo 2 (Japan) | HAL Laboratory | 26 December 1990 | Puzzle | NES | N | Y | Y | Y |
| Adventures of Musashi | Musashi no Bouken | Sigma | 22 December 1990 | Role Playing | NES | N | N | Y | N |
| Agalta | No Alternate Title | Fenrir | 1993 | Role Playing | PC98 | N | N | Y | N |
| Aigiina no Yogen: Balubalouk no Densetsu Yori | The Prediction of Aigiiena: The Legend of Balubalouk | Vic Tokai | 21 November 1986 | Adventure | NES | N | N | Y | N |
| Aim for the Ace! | Ace wo Nerae! | Nippon Telenet | 22 December 1993 | Sports | SNES | N | N | Y | N |
| Air Fortress | No Alternate Title | HAL Laboratory | 17 August 1987 | Action > Shooter | NES | Y | N | N | Y |
| Air Sea Battle | No Alternate Title | Atari Inc. | October 1977 | Action > Shooter | 2600 | Y | N | N | N |
| Airball | No Alternate Title | Tengen | 1991 | Puzzle | NES | N | N | N | Y |
| Airwolf | No Alternate Title | Kyugo Boueki | 24 December 1988 | Action > Shooter | NES | N | N | Y | N |
| Akazukin Cha Cha Cha | Red Riding Hood Cha Cha Cha | Sprite | 1995 | Action > Shooter | X68K | N | N | Y | N |
| Akira | No Alternate Title | Taito | 24 December 1988 | Adventure | NES | N | N | Y | N |
| Akuma-kun: Makai no Wana | No Alternate Title | Bandai | 24 February 1990 | Role Playing | NES | N | N | Y | N |
| Akumajou Special: Boku Dracula-kun | I'm Kid Dracula! | Konami | 19 October 1990 | Action | NES | N | N | Y | N |
