Back To Earth

Du bist ein Pilot eines Raumschiffes und mußt die Menschheit vor ausserirdischen Angreifen beschützen, die gleich mit einen großen Armade kommen um die Erde zu erobern.

You are a pilot of space interceptor bound back to Earth in order to give the captured alien spacecraft into the hands of scientists. The aliens are trying to stop you from doing this by sending a huge armada of their battleships. You have to destroy them all to accomplish your mission.