Outer Space Attack

Outer Space Attack is a 1-player Space Invaders clone for the 8-bit Atari.

The player controls a small ship which moves horizontally at the bottom of the screen, and can fire vertically upwards. A number of alien vessels scroll horizontally across the screen, and upon reaching the side of the screen move down one row and move to the other side, while firing at the player. If they reach the bottom of the screen or hit the player, one ship is lost. Three lives down, and it's game over.