Spacemaster X-7

Your assault ship was specially designed to destroy Hyperion Military Bases. Destroy as many as possible. You can fire missiles in the gaps in the Force Field or from inside the Force Field. If you are able to sneak inside, you must quickly destroy the bace before the Force Field closes on your ship. This is no easy task!

A version of this game was released by Sirius as Alpha Shield for the Atari 8-bit systems.