It's a card game themed on the decryption of the German Enigma machine during the World War II. The game is located on Bletchley Park, a military facility located in Buckinghamshire, England, where the decoding of German codes took place. Each player is an Enigma machine operator and he must code and decode messages before the other players and the Germans soldiers block him. An strategy and concentration game, with a lot of historic content. Gameplay: Each player must collect sets of cards with different symbols, retrieving the cards from a common pool, while also blocking the other players from obtaining the cards they need.