Many years have passed since mankind dominated the Earth. Invaders
from another galaxy have nearly destroyed our planet in their attempt
to add it to their evil Empire. Led by Lord Bios, the alien horde has
crushed all opposition. YOU are the last hope. You must face their
assault in personal, deadly combat. Equipped with an anti-gravity
device and armed with photon gun, you will seek and destroy the
minions of the Empire.

In your attempt to overthrow the dark Lord, you will fight the
strangest and strongest creatures from around the universe. Do battle
with the lizardmen, the shapeless ones, and the fierce bronze dragon.
But youre not completely alone in your quest for freedom. You can
upgrade your weapons system at several locations scattered throughout
the lands.