Glitch
Call of Duty: Black Ops    In the "Zombie Mode" on the map "Kino Der Toten", there is a glitch where, if you stand behind a certain wall, the "hellhounds will not attack. also, you can jump onto a podium where you are invincible.You can also jump out of the Pack-A-Punch Room in Kino Der Toten, yet it may take a few attempts. In "Multiplayer", there are glitches for getting out of maps, pr being in walls.