Slenderman Must Die: Sanatorium 2021 (Chapter 1) is a thrilling survival horror game where players must locate 8 hidden papers within an eerie sanatorium while avoiding the terrifying Slenderman.

Release Date

Originally launched in March 2014 for Android, with a WebGL version arriving in January 2021.

Developer

The game was developed by Poison Games, known for its captivating horror titles.

Platforms

• Web Browser
• Android

Controls

• W A S D – Move around
• Mouse – Look around
• Left Mouse Button – Fire weapon
• Right Mouse Button – Aim weapon
• Mouse Wheel – Switch between weapons
• R – Reload your weapon
• F – Pick up items
• Left Shift – Sprint
• Left CTRL – Crouch
• X – Lie prone
• Spacebar – Jump