Hey guys heh. King of Vague here. I used to play a game a long time ago, and im sure the description will be easy to think up. It was based on Sherlock Holmes, and the screen was either....like...tiles, or cards, which you (I think) had to arrange in a certian way so that the clues would connect, and you'd solve the murder. The graphics were old, 3 color style. Purple blue grey, you know what I mean heh.

221B Baker Street, I would say.