The zombie attack is spreading all over the world and now they are at your door! Well, my mistake, they are inside your house! You must find a way to survive this attack or you will learn the taste of brain, soon!
Use WASD keys to move, Space bar to jump. Aim with your mouse and click to shoot. Use I key to open/close your inventory, E to repair barricade and 1 to 4 number keys to switch weapon.