Project Nemesis is a fan driven website for games that use the One-Roll Engine (like Nemesis, Wild Talents, Reign and Monsters) or Chaosium's Basic Roleplay System (BRP) (like Call of Cthulhu) and the Delta Green setting.
Feijong is a game similar to Mahjong with a slightly varient rule system, but which like Mahjong uses a combination of skill, luck and strategy for success. The tiles resemble Mahjong tiles superficially but the characters and symbols appear to be derived from Aklo, Tchotcho and other blasphemous tongues.
A collection of folders in a zip file, normally given some innocuous or random name (stuff.zip or HSKDfjeik.zip). Most of the images are pornographic, but they have a tendency toward the more extreme, internet-based fetish pornography. These are often focused around extreme physical changes to the human body, hermaphroditic qualities or animal-human hybrids, and often in violent situations.
A collection of dubplates recorded with reggae, drum and bass or other
forms of electronica. Most are labelled with dates (ranging from 1997
to 2002) and locations (of which the most common is an often misspelled
'Club Apacolypse'.) and the names of the tracks ("Ya! Ya! Ya! Fadder in
de Ocean!", "Faces of God", "Sky-Devils", "ReverbElation").
This is some *very* basic
advice if you've never done a horror RPG. Much of it may be (too)
obvious... but my experience has been that running a horror game can be
very different from running an adventure game.
I was thinking about the Tcho tcho today and I had a thought. This may
clash a bit with some of the previous discussions on the Tcho tcho but
hear me out. Surely the different pockets of Tcho tcho that exist
around Asia would have some cultural, linguistic and even physical
differences depending on where they called home.
The only known copy of this ancient Greek treatise was written on
parchments that were later washed clean by a 10th century scribe so
that he could use them to copy St. Augustine's writings on the psalms.
At a glance, only the Christian scribe's work is visible. Closer
examination reveals the original text, faded and illegible, running at
90 degrees to the Christian scribe's lines.
ORE Horror 
This is some *very* basic
advice if you've never done a horror RPG. Much of it may be (too)
obvious... but my experience has been that running a horror game can be
very different from running an adventure game.