You play an alien aboard a spacecraft of unknown origin, fully intent on staging a takeover. There's just one problem: ZOMBIES. Not that you know what zombies are, but a few nanoseconds of close proximity are enough to confirm that they're a hostile breed, and they're all willing to eat you alive...unless you zerg them first! Be sure to collect the DNA they drop; you won't be the only one evolving into a stronger faster predator, so watch out! The longer you stay, the harder they hit! Â