The player is a zombie in a doomsday context of the world. This zombie is a little bit smarter than the others and has the ultimate goal of infecting all remaining surviving brains, all in the name of the “Big Brain”. The player moves around the map to infect survivors and turn them into zombies for their army. They can be brought back to the home base to upgrade their zombie minions. With a ready army, the player can lead the zombies to attack bigger survivor bases in order to continue to grow their army and infect all survivors