Double Melee

The double melee is a glitch that allows survivors to melee two times in extremely quick sucession.

How to Do the Double Melee
By pressing the melee button and the change weapon button in rapid sucession, the survivor will melee extremely quickly, and does not have to stop. This is extremely effective when being surrounded by a horde, or when ammo is scarce as the double melee will kill many infected rather quickly. This tactic is also extremely effective when to the rescue vehicle during the finales.

This tactic is also effective in versus mode as it can easily destroy someone wanting to pounce as a Hunter.

Effectiveness
The double-melee is much faster than a regular melee, and when surrounded by a horde and trying to get them away without shooting your friends in the process, this is an effective method. The use of this exploit is looked down upon in versus mode due to it being a glitch, and is unfair to the infected players.

Tips

 * Hold the controller so you can still aim and walk while double meleeing, this makes it so you become a basic walking boxer, killing all zombies without wasting ammo.
 * If you are alone and hear the distinctive growl of the Hunter, simply stand still and double-melee repeatedly, when the Hunter pounces, he will automatically fall into the butt of your guns.
 * Do not use in versus mode as you will likely be kicked and called bad names.