The world has been invaded by an alien race of mechanized warriors. You are a military glider pilot who has survived the invasion.
Your objective is simple: destroy the alien machines and restore the supremacy of humans. You have a laser, rockets, plasma weapons and bombs to help you achieve your aims.
The game is very simple to play. Your ship glides about the screen with the mouse and shoots different weapons with the mouse buttons. The screen moves about with vertical scroll, and the destroyed aliens offer improvements that you must collect to increase your power and weapons to confront the aliens.