If the game freezes, just click inside it (games can get unresponsive if you click elsewhere on the page).
Thousands of years have already passed since the Zap generation were wiped off the planet by the humans, however they have woken from the dead and are back for revenge. Fight for your life in this amazing defence game through 20 thrilling levels and three different difficulties. Kill Zaps and earn yourself points to upgrade your weapons and defences, the survival of the planet depends on you!
This game is played with the mouse only.