From the Invisible City Productions website: Investigate and explore with two to four detectives and a map. Goal: Discover your opponents’ hideouts before they find yours. Players move their pawns around a map (any map will do, ideally one that’s bigger than 8" x 10".) Using poker cards and 20 Questions-type questions, players try to deduce the location of their opponent's hideouts. Winning: In a two-player game, the first player to successfully guess a Hideout wins. With more than two players, the player with the most points (which are gained by finding hideouts) wins. Rules are available here: http://www.invisible-city.com/play/65/navigator