Welcome back to London where the champions of Scotland Yard are once again on the hunt for the invisible Mister X! At the beginning of Scotland Yard: Das Kartenspiel, an implementation of the evergreen title Scotland Yard, the Mister X card is randomly distributed to one of the players. With the magnifying glass cards, the investigators try to find out which other player is behind the actions of their invisible foe — and if Mister X's camouflage comes down, the others have to play cards from their hand as quickly as possible. With the powerful black tickets, Mister X tries to put the detectives under pressure. Can the investigators reveal the Mister X card before the draw pile is empty, or will Mister X slip free to being the cat-and-mouse game once again?