Board Game Central
Board Game Central is one of the web's top sites for board game information, rules, software, books, and links. The site specializes in traditional abstract games such as Backgammon, Chess, Checkers, Dominoes, and Dice games, but also offers information on Asian games, strategy games, family games, kids games, and much more.
The information about mystery games at Board Game Central includes pages for Clue, How To Host a Murder, Murder Mystery Games, and Murder Mystery Party games.