All of the individual cases from the first Sherlock Holmes Consulting Detective game are also on Steam in 3 3-packs.

I own almost all of board games and have played through about half of the cases in the first Sherlock Holmes Consulting Detective. They are fun, but very, very challenging and take a long time. The board game won the lauded Spier de Jahrs award for board games back in the 1980s. It has had some reprints over the years, but the translations are horrible. Get the originals if you want the board games. There also was a new release designed and released just last year called Sherlock Holmes The Baker Street Irregulars that was designed by a big Sherlock Holmes fan from the BoardGameGeek forums who has a master's degree in game design.