Slenderman History: WWII Faceless Horror is a scary 1 Player game. Explore the new story and return to the past to complete a crucial mission. It is related to medical experiments on soldiers to generate supermen. Not only that, the Nazis tried to do that with the Occult. They called for the devil with ancient items. That is a very dangerous character. Now, you have to break into the base and search for the secret bunker in order to reveal two briefcases with documents about that event. Good luck!