ALL 6 perks at once
This only works while playing a multiplayer match of TranZit or Town Survival.
Get any 3 perks(juggernog,speed cola,and quick revive are recommended) and Tombstone. You should have 4 perks by now and can't buy any more perks right? WRONG! Simply make sure to have a score above 10,000. You need to get downed by a zombie and press square to die and leave your tombstone behind. As soon as you spawn after the round ends, get the other 2 perks you did NOT have along with tombstone(you should have 3 perks by now) now get your tombstone and you should get your guns back as well as your previous perks along with the new perks you just bought. ALL 6 PERKS ARE THERE!!! You're now one dangerous zombie killer!
If you DO get down for ANY reason, you can just get tombstone again as soon as you spawn the next time and get your tombstone to get everything back and you still get 6 perks.
TIP: I would only use this trick on the map Town Survival.
Edited: Mar 3 2014
Added by: Modder_Dude0_0 Feb 19th 2013, ID#5188