Question: how to unlock secret characters in ww2 zombies?
Answer: B.A.T. Agent: Kill a Treasurer Zombie. ...  Survivalist: Get to Round 30 without purchasing perks. ...  Hunter: Obtained Zombie Hunter part A — random Treasurer Zombie drop. ...  Mountaineer: Survived 20 rounds without opening doors. ...  B.A.T. Elite: ...  Assassin: Defeat the Panzermorder by Round 12.