to celebrate release of the motion picture Sherlock Holmes, starring Robert Downey Jr. and Jude Law, Warner Bros. Pictures has unveiled the unique two-player on-line experience 221B.

The adventure is to be played in the eight weeks leading up to the launch of the movie across the UK on Boxing Day, 26th December 2009.

In 221B players team up as Holmes and Watson, who together will chase villains, interact with other characters from the movie, explore locations and make deductions as they journey through eight chapters of intrigue and mystery, concluding in a segue into the start of the movie.

Played online, free of charge to all, the rich audio-visual experience brings alive the 1890s London of Guy Ritchie’s film by blending cutting-edge technology, exquisite design and a world of unique content, drawn from exclusive access granted to the cast, crew and locations during the making of the movie itself. It will also allow fans a special preview look into the world of Sherlock Holmes prior to its worldwide in-cinema debut.

> The game is afoot - http://www.221b.sh/