Instructions
Walk or sprint over to the approaching zombies using the left analog stick on the controller. You can click in the left analog stick on the controller to sprint.
Repeatedly press the right analog stick on the controller. This will initiate the melee attack. The quicker you press in the stick, the quicker your character will hack the zombies.
Strafe to the left and right of the zombies using the left analog stick. If you stay in place while attacking the zombies, you are more likely to be harmed. By keeping active, you can avoid the zombie attacks while performing the melee.