It's a shit game and isn't scary at all. I don't care how free it is; the cat's shit and the dead animals that it puts on my porch every other day are also free. Picking up some paper while a generic, poorly made model that vaguely resembles Slender man jumps out at you and yells "BOO!" doesn't make a very interesting or fun game. Amnesia was scary because you rarely saw the scary bits coming. In Slender, I could just guess when the "scares" happened.
inb4 Travis gets butthurt because I don't like his favorite game