221B Baker Street: The Master Detective Game

221B Baker Street: The Master Detective Game is a board game featuring Arthur Conan Doyle's fictional detective Sherlock Holmes. Players travel through the streets and alleys of Victorian London picking up clues while attempting to solve 20 intriguing Sherlock Holmes Adventures written especially for this game. The game can be played competitively by 2 or more individuals or teams. Or it can be played as a cooperative game, with all players teaming up as Baker Street Irregulars to help Holmes solve the case. When played this way, the group bands together to decide which of the fourteen locations to visit first, and the meaning of each clue is discussed by the group. The game can also be played solitaire.

It was developed by Jay Moriarty (dba Antler Productions) in 1975.