221B Baker Street is a 1987 computer game published by Datasoft

Datasoft

Datasoft, Inc. was a video game developer and publisher founded in 1980 by Pat Ketchum. Based out of Chatsworth, California, Datasoft ported games from arcade systems to personal computers and acquired licenses for games from famous movies and TV shows....

, based on an earlier board game

221B Baker Street (board game)

221B Baker Street: The Master Detective Game is a board game based on Arthur Conan Doyle's fictional detective Sherlock Holmes and developed by Gibsons Games in 1975 and sold by the John H. Hansen Co. in the US since 1977. The players have to solve cases using the clues provided by visiting...

 of the same name. The game was inspired by the exploits of Arthur Conan Doyle

Arthur Conan Doyle

Sir Arthur Ignatius Conan Doyle DL was a Scottish physician and writer, most noted for his stories about the detective Sherlock Holmes, generally considered a milestone in the field of crime fiction, and for the adventures of Professor Challenger...

's fictional detective Sherlock Holmes

Sherlock Holmes

Sherlock Holmes is a fictional detective created by Scottish author and physician Sir Arthur Conan Doyle. The fantastic London-based "consulting detective", Holmes is famous for his astute logical reasoning, his ability to take almost any disguise, and his use of forensic science skills to solve...

 and derives its title from the detective's residence at 221B Baker Street

221B Baker Street

221B Baker Street is the London address of the fictional detective Sherlock Holmes, created by author Sir Arthur Conan Doyle. In the United Kingdom, postal addresses with a number followed by a letter may indicate a separate address within a larger, often residential building...

 in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

.

Gameplay

Up to four players compete against each other to solve various mysteries in and around Victorian London. Each player can assume the role of one of four characters from the Sherlock Holmes books—Sherlock Holmes, Dr. Watson, Irene Adler

Irene Adler

Irene Adler is a fictional character featured in the Sherlock Holmes story "A Scandal in Bohemia" by Sir Arthur Conan Doyle, published in July 1891...

 or Inspector Lestrade

Inspector Lestrade

Inspector G. Lestrade is a fictional character, a Scotland Yard detective appearing in several of the Sherlock Holmes stories by Arthur Conan Doyle. Doyle used the name of a friend from his days at the University of Edinburgh, a Saint Lucian medical student by the name of Joseph Alexandre Lestrade....

-- and can select from 30 different adventures. Case file for each mystery are provided in the manual and give the particulars of the case, including key clues and suspects.

To solve the case, players roll dice to move among 15 different locales throughout London, collecting the clues necessary to unravel the mystery. Each player also visits Scotland Yard to collect a badge, which allows him to "lock" a particular location on the map, making access to it by the other players more difficult. Once a player believes he has solved the case, he returns to Baker Street where he must successfully answer a quiz. Play ends when a player successfully passes the quiz.