From the Publisher: Race to be the first player to collect 39 points. You may need to be sneaky - You may need to out-bluff the others - You may need help from the Man in Black - Yet to win, you must collect 39 Clue Points first. May the cleverest Cahill control the world! Players work to achieve 39 clue point by playing in turns. The turn consists of a player playing one of five types of cards (family, clue, transportation, block/unblock, or person). The cards must be played in a certain order in the "stack". With the exception of the block/unblock cards which can be used to stop a stack from progressing or to unblock a stoped stack. Once the pre-defined order is met the player that completed the stack gets to score the clue points from the stack. Sound easy? It's not! When it is time for a player to score a stack, all players, including the player who finished the stack must subtract points from thier score equal to all clue points in their hand. Conversly whom ever has either Amy or Dan Cahill will score one point for each card even if they did not finish the stack. Game play typically lasts 20-30 mintues.