Alien Assault

Alien Assault is a tower defense shooting game where you base is under a serious attack from hordes of alien invaders.  Its up to you to hold off the attack and shoot the aliens while you try to defend your base.  Before each level starts you will see where the attack is coming from so it will be important for you to set up your troops in the best defense strategy to make sure they are in position to defend your base from the aliens.