About a week ago I was rummaging through the Internet and discovered this:
http://creepypasta.wikia.com
It even has a videogame-related section, with things like this:
(http://images3.wikia.nocookie.net/__cb20120517005550/creepypasta/images/6/6d/Sonic1.png)
(http://images.wikia.com/creepypasta/images/5/59/Flippy_._..png)
However, this section really lacks adventure games. So... how about a CMI or DOTT creepypasta? Or maybe Discworld or Humongous games?
Some of the AGS games were creepy enough on their own.
Well, what do you know... An actual Toonstruck 2 creepypasta story: http://creepypasta.wikia.com/wiki/Toonstruck_2
I wonder how Keith Arem feels about this...