In Buried, acquire a perk for free.

In Buried, drop the beat on 10 zombies in one game.

In Buried, Pack-a-Punch a weapon during round 1 with no one using the bank or Weapon Locker.

In Buried, survive an entire round within the maze on round 20 or higher.

In Buried, return to processing.

In Mob of the Dead, use and upgrade all traps before round 10.

In Mob of the Dead, open a door without spending points.

In Mob of the Dead, Brutus completes his patrol.

In Mob of the Dead, complete the cycle 3 times.

In Mob of the Dead, execute the escape plan.

In Die Rise, use Pack-a-Punch and all perk machines in one game.

In Die Rise, revive yourself.