Oberst Sauer is a character in Call of Duty: WWII. He is an officer wearing grey uniform. He is busy working in the room next to Karl Fischer. The player assumes control of Camille "Rousseau" Denis and can interact with him, asking him is he Fischer or telling him the code phrase "Verlaine". If the player tells him the code phrase, he will ask Rousseau to give him her ID papers and ask her why she has come here. If she responds "inventory reports" instead of "travel documents" she will be arrested, resulting in a game-over screen.