After two wars, the puny, petty humans have decided to launch a counter attack and destroy the Alien race once and for all. This time it is the Aliens who have to protect their land and fight for survival

Create your own unique tech tree which allows you not only to buy additional upgrades for your towers, but also provide them with additional damage, armor or critical hit chance. Each of the game’s eight unique towers has its own special ability; not every tower is good against every type of unit.

Battle the humans on 24 beautiful levels with multiple levels of difficulty to choose from. Expect many failures, but remember – without your help, the Aliens will die.