You won't get into the high rounds without turning on the power and activating Pack-a-Punch in Tranzit, the launch map for Black Ops 2 Zombies. If you need a guide on activating both of them, then ...

The Gun Storage Locker is a mechanic unique to Black Ops 2 Zombies, where you get to take a gun, store it in a locker, and come back to it later that same game, or in a new game, regardless of what ...