User blog comment:SlenderVSJeff/Mr. Slenderman/@comment-4295646-20120830041636

If anyone is looking for some additional spooky Slenderman-based material out there. . . well, I don't have any. But the four-part series of adventure games collectively titled the "Chzo Mythos" features a very similar character called the Tall Man; the likeness is almost uncanny, to the point where it seems possible that the original Slenderman photo-edits could have been partially inspired by the games. I'd recommend any horror fan play them anyway.

In chronological order, the games are "5 Days A Stranger", "7 Days A Skeptic", "Trilby's Notes", and "6 Days A Sacrifice". They're all free to download so check 'em out. Well-written, engaging stuff. (Spoilers abound on the internet, though, so search cautiously.)