The library of Sherlock Holmes adventure games is starting to catch up to the written series, and you can soon add another name to that list, as a teaser was unveiled today for the great detective's next mystery, The Testament of Sherlock Holmes.

Little is known so far about Frogwares' sixth Holmes adventure, and the trailer won't do much to alleviate that. The light atmosphere of children playing with a little Watson marionette is foreboding in its whimsy, as this game is described by its creators as perhaps "the most dangerous investigation of his entire career."



Like the previous game in the serious, Sherlock Holmes vs. Jack the Ripper, the new title is being developed for both PC and Xbox 360. No firm release date has yet been announced, but The Testament of Sherlock Holmes is currently slated for a fourth quarter release in 2010.