UFO

UFO is a 1-player arcade game for the VIC-20.

The player controls 3 artillery bases at the bottom of the screen that try to shoot incoming enemy missiles. The player moves a targeting arrow at the bottom and right hand of the screen to aim their self-defense. The player has limited shots each round to shoot down incoming missiles, and if they run out of artillery are left vulnerable to incoming fire. Artillery is replenished at the end of each round. When all defending infrastructure is destroyed, it's game over.