#6. Scotland Yard ($28 @ Amazon.com)
You’re a member of the fuzz in London and are on the hunt for the evasive Mr. X. Alternatively, you’re Mr. X and are on the run from a bunch of Bobby flatfoots. The cops can’t make mistakes; each player has only 22 moves to track down the perp using the process of elimination and clever guesswork. Your reward for nabbing him? You become the new Mr. X.