After a zombie apocalypse, you need to survive all the dangers in a highly threatening world. Do what is necessary to stay alive. That includes anything. Use a gun, grenades or a knife to kill all undead creatures.
Use the arrow keys to move. Press S to Fire Primary Weapon. Press D to Fire Secondary Weapon.
Press A for Survival Knife. Press W to Fire Upwards with Handgun (Doesn't consume ammo). Press F for First Aid Spray.
Press Enter to open Doors/Interact with Environment. Press Spacebar to open inventory.
Faster Rate of Fire (Handgun) - Hold S to fire rapidly.
Samurai Sword - A to use (replaces Survival Knife).
Explosive Rounds (Handgun) - Tap S to fire then S again to detonate bullet (replaces normal bullets).
Press G for Grenades.