W to jump, S to prone, A and D to move. E to fire, R to reload, Q to heal, F to switch weapons(two slots), G to switch to pistol(third slot), and hold space bar to pick up guns. Enemies: Ordinary zombie: no protection, can only punch Gangster: 33% protection, uses a revolver. Armed criminal: 50% protection, uses a M16A1 on single shot Mutant: 67% protection, uses a MK-47 Mutant.