You don't have an account?
Slenderman Must Die: Sanatorium 2021
The game you are looking for is available only for DesktopMobile.
Slenderman Must die: Sanatorium 2021 (Chapter 1 is a survival game for Slenderman to locate the 8 papers hidden in a frightening sanatorium.
Poison Games made Slenderman Must Die: Sanatorium 2021.
March 2014 (Android). January 2021 (WebGL).