Game Controls / Instructions:
Alien TD is a strategy based tower defense game. Here in the game your area is being attacked by waves of aliens who have come to this planet. You should not let the waves of aliens pass through the path and get into your territory. So, what can be done to stop these aliens? Well, you can start placing towers, turrets, automated weapons and other units according to the availability to set up a defense system that will eliminate all the aliens before they make it to the end of the path. The aggression from the attackers will continue to increase and so your preparation should continue to improve as well.