The Stalker is an unlockable charcter within the Nazi Zombies mode of Call of Duty: WWII. She can be unlocked by completing the "Vigilant" challenge set in the map The Shadowed Throne.
- Keep Hands Clear - Complete Stadtjäger Down's boss fight without any player in your game going down. (Heavy Machinery)
- Just Takes A Scratch. - Get to Wave 31 without taking any damage. (I'll be Fine)
- Hold Your Ground. - Get to Wave 21 without opening any doors. (In the shadows)
- Minimalist - Get to Wave 31 without using the Blitz Machines, the Wunderbuss or the Ubersprengen. (No shiny tools)
- Extinguisher - Get 10 headshot kills on Gekocht zombies in a row. (Snuff the flame)