You need to survive 13 more days in hell in other words under the same roof with bloodthirsty zombies. Grab your gun and shoot em all up before they get you.
Use the arrow keys or the WASD to move around.
Use the mouse to aim and shoot.
Press R or spacebar to reload.
Press [1,2,3,4,5,6] to select weapons. Or [Q,E] / mouse wheel to switch.
[H]: use health potion
[P]: pauze game