Mule Kick is a Perk-a-Cola that appears in every single Call of Duty: Black Ops map as long as you're connected to the internet (including World at War remastered maps), and without internet conncection this perk will only appear on Moon. This perk also returns on Black Ops 2 zombies on the new map Die Rise . The effect gives the player an additional weapon slot bringing the total number of weapons a player can hold to three. This perk is currently the most expensive perk, and the third most expensive thing available for purchase, at the high price of 4,000 points. The Mule Kick's icon is three white pistols along side each other with a dark green background.