The world seems to be fine, but the truth is further from that.  The zombie apocalypse is already here and everyday night, the zombies attack the living to eat them and turn them into one of the undead.   The number of zombies are fast rising and that is a bad thing. The game is played via mouse you need to use your weapon to defend the few living survivors.  On every kill, you will earn money. You can use the money to buy a new slot or buy additional weapons.  As you progress in the game, the number of zombies will rise and new zombies will be out to get you.