Incentivized by a sinister force, alien invaders have descended upon earth. Alien ships descend upon the planet, firing beams that turn people into zombies-like creatures.
The planet is yours to reclaim, as you respond to the threat by besieging the alien mothership. You tame adversaries, build up defenses, and fight back against the attack, forging paths through an ascending collage of destroying and protecting sites. The spacecraft can be accessed digitally, without the need for a download or registration.