

正在翻譯——原始文字為英文。
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 | 1984年8月1日 |
| FM-7 | 1984年8月1日 |
| PC-9800 Series | 1984年12月1日 |
| MSX | 1985年3月31日 |