

Tradução em andamento — texto original em inglês.
In the 21st century, powerful computer systems were invented. but humanity failed to control them. Near the end of the century, one such computer system, the weapon system Orion, triggered a devastating nuclear war, bringing the human race close to extinction due to the nuclear fallout. The remaining human survivors find shelter and go into a cryogenic sleep. Waking up 100 years later, they go out onto the surface, to face a new, unknown world...
| PC-8800 Series | 1 de agosto de 1984 |
| FM-7 | 1 de agosto de 1984 |
| PC-9800 Series | 1 de dezembro de 1984 |
| MSX | 31 de março de 1985 |