To get in the spirit of Halloween, Conan O'Brien checks out some scary PC games in the dark.

Yeah, yeah, the whole Harlem Shake thing is out of hand. And this video is kind of one meme colliding with another meme, to create a memesplosion. Still, I got a chuckle out of ol' Slendy's take things.

Slender: The Eight Pages was one of the more beguiling successes of last year—a weird, super low-rent thriller that combined the popular Slenderman mythos with simple jump-scare design. Its stripped-down look and basic design were part of the appeal.

Slender: The Eight Pages was one of the true surprises of 2012—a crude, free PC game that also happened to be one of the scariest games of the year.

Not with a gun to my head would I watch Marble Hornets. How much of a cowering, frightened ninny am I? I won't even google it to get an abstract of what the YouTube series is about to cite in this lead paragraph. It is, on Kirk Hamilton's recommendation to me, the most fucked-up frightening entry in the Slenderman…

See here, the official teaser for Faceless, a game previously known as Slender: Source. It's got a complicated lineage: inspired by another game which was in turn inspired by an internet meme.

I know, you're likely sick of Minecraft by now, and probably of Slender as well, but this combination of the two might light a fire under you.

Ever since the breakout success of the stripped-down horror game Slender: The Eight Pages, we've been seeing Slenderman-related stuff cropping up in every corner of the internet. So I wasn't that surprised to fire up the app store today only to see a game called "Slenderman" in the #2 spot of the top 10 paid apps.

I know, I know. You're all tired of the Slender videos. "It's not even scary!" many of you have said in the past.

By now, most folks know about Slender: The Eight Pages. The crude yet terrifying indie game has become something of an internet sensation over the last couple of months, scaring the pants off of countless thousands around the world.

To spice things up, the Gamemakers in this version of The Hunger Games introduce the tall, creepy Slenderman to a fight for survival amongst young kids.

It's been two months since the internet first laid eyes on Parsec Productions' splendidly scary free horror game Slender. In that time, we've seen all manner of Slender-related internet fallout.

Ever since we learned that there's a multiplayer, source-engine take on the Slenderman game in the works, I've been hoping see more of the game in action.

Slenderman, that terrifying faceless ghoul in a suit, has been around for a good long while before that stripped-down, scary video game Slender hopped into the public eye. He's a long-standing meme going back years, and he's turned up everywhere from the YouTube Series Marble Hornets to.. well, to a Skrillex video…

Have you played Slender yet? It's fairly simple, which is part of why it's so terrifying.

Are you a fan of the creepy 'Slenderman' game Slender, but maybe you wish it looked a bit better? Perhaps the game would be better in Valve's Source Engine, no?

There's something special about watching someone else play a horror game. Particularly one you've already played. It's the mark of a truly scary game—once it catches on, there follows a growing number of videos of people playing, and being freaked out by, the game. It became popular with Amnesia: Dark Descent—I…

Go ahead, see how much of this you can take. What's the matter? The clip is only 2:09 long.

Let us never underestimate the internet's ability to come up with freaky crap. The vast reach of the web creates mysteries as often as it dispels them, and sometimes those mysteries are truly scary.