It's a Sherlock Holmes game from Frogwares in the vain of all Sherlock Holmes games from Frogwares. Walk around, gather clues, solve obscure puzzles. In order to run it in Windows 11, you must first edit game.ini, the guide for which can be found on the internet, oh, and on newer nVidia GPUs it exhibits graphical glitches, mainly with lighting, and cannot run at high detail.