![Alien Syndrome [Model TGN-009-AS] screenshot](images/game/54887_2.png "Alien Syndrome [Model TGN-009-AS]")
Alien Syndrome © 1989 Tengen.
North American release. Game developed in Japan. For more information about the game itself, please see the original Japanese release entry; Alien Syndrome [Model SAN-AZ]
Game description from the Tengen manual:
The year is 2089 of the Galactic Calendar. In this far-flung future, humans have colonized the outer planets. Without warning, the glory of this achievement turned into disaster: A horrible race of aliens has imprisoned an entire colony aboard its space ships! Each of these vessels houses countless numbers of slimy monsters led by a vicious alien boss. Having miraculously escaped capture, you must go from ship to ship in a valiant effort to save your fellow humans.
GAME ID: TGN-009-AS
VARIANTS:
1. "Manufactured by Tengen" (back label).
2. NO "Manufactured by Tengen" (back label).
| Score (from the Tengen Manual) | |
| Enemy points | |
| Alien - 200 points each | |
| Boss's Henchman - 200 points | |
| Alien Boss - 10,000 points each | |
| Captive points | |
| 1st captive saved - 100 points (2nd captive is 200, 3rd is 300 and so on, which makes the 12th captive worth 1200 points!) | |
| Note | When you lose a life, you go back to 100 points for the next captive saved. |
| Bonus at time of clearing a ship | |
| Time left - 300 points each second left | |
| Captives saved - 200 points each person | |