| Arcade Video game |  Alien Storm Model 317-0154 | 1990 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-Tech cart. |  Alien Storm Model 47 P | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | Alien Storm Model 7075 P | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Alien Storm Model G-4048 P | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Atari ST disk | Alien Syndrome | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Commodore C64 cass. | Alien Syndrome | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| IBM PC 3.5in. disk | Alien Syndrome | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| IBM PC 5.25in. disk | Alien Syndrome | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-Tech cart. | Alien Syndrome Model 07 | 1987 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Alien Syndrome Model 2324 | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Alien Syndrome Model 317-0033 | 1987 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game |  Alien Syndrome Model 317-0037 | 1987 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mark III cart. | Alien Syndrome Model G-1339 P | 1987 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | Alien Syndrome Model MK-7006-50 P | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Alien³ - The Gun | 1993 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Alisia Dragoon Model 1039-50 | 1992 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega-Tech cart. | Altered Beast Model 01 | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Altered Beast Model 1100-50 | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Altered Beast Model 317-0066 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Altered Beast Model 317-0069 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Altered Beast Model 317-0076 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Altered Beast Model 317-0078 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | Altered Beast Model MK-7018-50 P | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | American Baseball Model 7019 | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Master System cart. | American Pro Football Model 7020 | 1989 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | AMOK Model 81064 | 1997 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Saturn CD | AMOK Model MK81064-50 | 1997 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega AI Computer cart. | Andersen Dream Model AI-4058 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Angel Kids | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mark III cart. | Anmitsu Hime Model G-1328 | 1987 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Dreamcast GD | Ao no 6-go Saigetsufutai Hito - Time and Tide Model HDR-0075 | 2000 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Appoooh - The Pro-Wrestling Game | 1984 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Redemption mechanical game | Aqua Stage | 1996 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Arcade Video game | Arabian Fight | 1991 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Pinball | Arabian Night | 1976 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega AI Computer cart. | Arabian Night Model AI-4057 | 1988 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Arcade Classics Model 2330 | 1996 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Mega Drive cart. | Arcade Classics Model MK-1715-50 P | 1996 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Arena Model 2565-50 | 1995 | SEGA Enterprises, Ltd. Tokyo, Japan |
| Sega Game Gear cart. | Arena Model 2565 | 1995 | SEGA Enterprises, Ltd. Tokyo, Japan |
