We thought we had found them all. But now it appears that the creators of Call of Duty Black Ops, Treyarch have added yet another achievement to the Zombies game mode. This follows the addition of the ‘Mule Kick’ perk to all  Zombies maps! (Natch der Untoten, Verruckt, Shi No Numa, Der Riese, Kino der Untoten, Five, Ascension, Call of the Dead). Click this link to see the locations of  ‘Mule Kick‘ on each map. Treyarch obviously like putting achievements into their Zombies maps for us to get our sticky mitts on. If you know anything about this mysterious achievement please leave it in the comments: