It's been said that a mystery endures far longer than an answer. This certainly seems to be the case with Clue, one of the most enduring games of the 20th Century. Whodunnit? Where? And how? The answer is always different, and the world has not yet tired of solving the mystery. Why is Clue still so popular? What was the secret to its success? Does it deserve its reputation as a classic? And what other games might appeal to mystery fans?