Sherlock: The Riddle of the Crown Jewels on the Commodore 64 is Infocom’s 1987 interactive fiction mystery, designed by Bob Bates, where you play Dr. Watson as Holmes deliberately steps back, suspecting the jewel theft is a trap. Set during Queen Victoria’s 1887 Golden Jubilee, you have a tight 48-hour deadline to recover the stolen Crown Jewels, crisscrossing London by cab and solving riddles tied to famous landmarks while interacting with familiar Holmes characters, before the trail ultimately leads to Moriarty.