Iron Tiger

Iron Tiger is an unlockable character within Call of Duty: WWII Nazi Zombies, he can be unlocked by completing a full challenge set in Beneath the Ice the third and last chapter of The Tortured Path, in this case being the "Archaeological Dig" challenge set.

Challenges

 * No Handouts. - Escaped without resupply (None for me, thanks.)
 * Escape without picking up supply drops.
 * Careful Researcher - Return from an archaeological dig without scrape (Precautionary Explorer)
 * Escape the map without going down.
 * Equipment Menace - Protected critical equipment with clever thinking (Tactical Protector)
 * Defend a Defense Objective and do not fire any bullets (you can use Jack-in-the-Boxes)
 * Assembler - Repaired the sword with attention undivided.	(Focused Craftsman)
 * Repair the Sword of Barbarossa without picking up supply drops.
 * Fast Hands - Repaired the sword on the clock. (Blacksmith)
 * Repair the Sword of Barbarossa within 11 minutes.