Battle In The Sky - Version 10.0 The Earth has been invaded by an evil alien race. And since you are the top pilot of the most advanced fighter craft around, you are the world's only hope ! You must battle your way through four different areas, until you finaly battle high above AREA 51, and face off against the leader of the evil aliens in his powerful spaceship. This program features: Over 20 Different Levels, Numerous Areas, Numerous Different Enemies and weapons.