What could possibly be worse than fighting hordes of zombies? Take the “13 Days Challenge Pact” and prepare to enter the depths of hell. In 13 Days of Hell, fight for survival against waves of Lost Souls, and take off their head before they take off yours! Upgrade your weapon from a pistol to automatic weapons to increase your chance of survival, and aim for the head. To play 13 Days in Hell, use the mouse to aim and fire, use spacebar or “R” to reload, and the 1-5 keys to change weapons. Time to set your feet in the depths of the underworld… good luck brother.