In a parallel horror world police officers train to shoot zombies and not burglars out in the streets. Take classes with a zombie survival police trainer. Specialized elite teams are trying to clear our planet from the undead and carnivorous creatures, being each one of them approved in a similar test. The obvious goal of shooting zombies' heads goes way beyond taking aim and pulling the trigger with the Mouse, as the trainers will make sure the targets will grow in difficulty to an absurd level, like flying above one's head. Prove to be able to survive out there in chaos.