Minecraft, Minecraft, Minecraft.

Yes, this image is intentionally dark. That makes it scarier.

Its all my 10 year old talks about these days. Its funny, because some of the horror elements in it scare the crap out of him.

Well, a coming upgrade is going to ratchet up the fright even further by introducing the Endermen. These 3 meter tall creatures only come out at night, and generally won't bother you, unless you look directly at them--then things get worrisome. Click through for more detail on these initially unassuming creatures.