Alien Armada

Description
Alien Armada is a 1 - 2 player arcade game for the TRS-80.
Your Earth base is being attacked by an alien armada. The player controls a rocket launcher that moves laterally at the bottom of the screen and fires directly forwards. Enemy vessels swoop down towards the player and fire downwards. When the player destroys all the ships on the screen a new wave appears. There are 3 levels of difficulty. The player starts with 3 vessels, and gains a new ship every 5000 points.