Help Harry, a detective, in his mission to solve the mysterious case of a missing man who appears to be confined in an old castle. Make sure to look for useful clues by carefully searching the hotspots. Harry Quantum 4 is presented to you by SolidGames.com and is sponsored by Turbo Nuke. This puzzle game has been played 2,837 times by our visitors and currently has a rating of 89% after 9 votes.