Our planet isn't the only one that needs defending! Alien machinery has started attacking our colonies in space and on alien planets. Battles, explosions, defenses... Plant the best defense throughout the entire galaxy and save our colonies from alien destruction. Features Special AbilitiesThree different special abilities to help you win every battle and defend every tower: Laser Strike Shock Wave Repair Completely different surroundings and battle locations: Space Desert Alien Mushroom Forest 9 different enemy machines and 16 different types of defender towers.