Dungeons & dragons
Dungeons and Dragons (sometimes abbreviated to D&D) is a board game in which players roleplay differant characters, some of which use evil magic making it an effective recruitment tool for Satanism. Despite its occult ties, the game has built up a large fanbase. The playing of D&D has led to suicide or even murder in the past.
Gameplay
At the start of the game, players create "characters", imaginary people represented in the playing area by a figure. Most of these characters have the ability to use occult powers. The players work togeether to finish tasks and fend off beasts.
The enemies are controlled by the Dungeon Master, or DM. The DM is the equivalent of a referee in that they are in control of most parts of the game.
External Links
Examples of murder and suicide resulting from D&D - http://www.chick.com/reading/books/204/0204_10.asp
A Jack Chick tract about dungeons and dragons - http://www.chick.com/reading/tracts/0046/0046_01.asp