"Your mission is to command the mother ship through the meteor shower and destroy Zeral and Xanac, the alien attack ships." - Space Force Box
Space Force is a basic Asteroids port. The gameplay is pretty good, but it gets very difficult in just a few levels.
Space Force box shots
Space Force instructions
Space Force screen-shots and sound samples
Space Force ROM image
Easter Egg: It seems the Space Force program is written to "wait" for a clear spot in the middle of the screen when putting a ship in play. In the higher levels, when there are LOTS of asteroids, there is never a clear spot, so the game just waits. Effectively ending the game. :o(