During the night, protect your barricade against the oncoming hordes. Manage your time during the daylight hours to search for weapons, survivors and to repair. Move with the WASD keys and aim/shoot with your mouse. Reload with the R key. Press space bar to switch weapons.
If you're a fan of Resident Evil, The Last Stand will satisfy your daytime zombie-killing needs. As you proceed through each level you're gradually given more weapons -- soon no zombie will be a match for your head-blasting skills!