Shadowguard is an unlockable character within Call of Duty: WWII Nazi Zombies, he can be unlocked by completing a full challenge set in the map The Frozen Dawn, in this case being the "Shadow Hunter" challenge set.
- Forgotten by Death - Laughed in the face of Death (Death becomes)
- Corpse Dancer - Cut them down before they rise up (Waltz of starvation)
- Ancient Banquet - Cannibalize the Ancient Evil (Elder Blood)
- King's Lament - No crown for the wicked (Crown's solace)
- Death's Sorrow - Survived when no one else could (Wreathed in death)
- Using the "Cheat Death" ability of the Fang of An'heist, survive the Wrath of the Sun attack of the God-King.