Call of Duty: WW2 Zombies - How To Unlock The Mystery Box

Get random weaponry in Groeten Haus, the unlockable survival map in Nazi Zombies, with this quick (and completely secret) method.

Correct requirements for each character challenge on WWII (with tips, restrictions and other notes) : r/CODZombies

Mystery Box, Call of Duty Zombies Wiki

Mystery Box, Call of Duty Wiki

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Call of Duty: WW2 Zombies - Groesten Haus Mystery Box Location