NOTE: If you want to install Slender v0.9.7 see the updated how-to.

Another quick and dirty how-to for installing Slender on Linux using PlayOnLinux. Yes, this fixes the mouse issue.

About:

Slender is a first person horror game created by Parsec Productions where your only goal is to find 8 manuscripts about the Slender Man, a paranormal creature. The more directly you come in contact with the Slender Man, the faster your sanity drains.

Links:

PlayOnLinux

Script

Slender Game v0.9.4