The Testament of Sherlock Holmes, the new investigation video game developed for PlayStation 3, Xbox 360 and PC by Frogwares, today unveiled a new video teaser. This video immerses us in the dark ambiance of the game, in which the very personality of the famous detective is explored, and his true nature called into question. If Doctor Watson’s faith in Sherlock is reputedly unwavering, it will eventually fade and doubt will quickly set in as Holmes begins to act ever-more strangely. The Testament of Sherlock Holmes is slated for an early 2012 release, looks lovely and is perhaps one of the best looking adventure games out there, so kudos to Frogwares for that. You can view the teaser trailer after the jump.