Alien Invaders, if the name doesn't give it away, is a clone of the popular arcade game Space Invaders. Object is to destroy invaders descending on your city .You have 6 missiles and 5 minutes to play . Game speeds up as time goes on. You can fire from left or right side.High score remains on screen so next player can compare score. You can hide behind your castles. Exciting sound effects and colour. Fun for all the family