This is a vertical scrolling shooting game, with many unique selectable characters, and a data progression system.

There are a total of 8 stages, but only 4 stages will be played in one game. There is a course determination feature which players are able to influence.

This game can be played on Wonder Swan flash cart or PC.

It is the year 2355. After centuries of pollution, the Earth has become nearly uninhabitable. Humanity has started to emigrate from Earth, to escape the decaying planet. The countries of Earth have divided the solar system among themselves, with many countries merging to settle on Ganymede. As part of the great migration, the governments of Earth left behind portions of their military and society to maintain order and give an appearance of respect for the desolate planet.

40 years later, the humans left on Earth have banded together under one nation, calling themselves Old Military. These people, angry and bitter about being left behind in a wasteland, are declaring war against the planet Ganymede as revenge. Using the supplies and war machines left behind during migration, they attack the young society.