Slenderman Must Die: Sanatorium 2021

Slenderman Must Die: Sanatorium 2021 (Chapter 1) is a survival game set in a spooky sanatorium. Your mission is to find 8 hidden papers to survive the horror. It was developed by Poison Games and released in March 2014 for Android and January 2021 for WebGL. Play it on web browsers or Android devices. Use W A S D to move, the mouse to look around, and the left mouse button to shoot. Aim with the right mouse button and switch weapons with the mouse wheel. Reload with R, pick up items with F, run with Left Shift, crouch with Left CTRL, prone with X, and jump with the space bar.