Space Assault

Space Assault is Radio Shack/Tandy's version of the arcade smash Space Invaders. This version plays MUCH faster than the original, and also has 2 skill levels. Beginner plays much like the arcade, while Expert eliminates all of your protective bunkers, but lets you move vertically to a limited extent as well. Like the arcade, you have to take out entire fleets of invaders, while they march relentlessly down towards you. You also get to take pot shots at the mother ship that flies by every once and awhile along the top of the screen.