JM's Great Game was a proposed puzzle hunt organized by an unknown person, acting as James Moriarty from the BBC adaptation of Sherlock Holmes. The website for the event is http://thegreatgame-au.tumblr.com/. The game was supposed to begin in August 2012, and a playtest was carried out in April 2012 using a bulletin board in Haley Center.
The Tumblr is no longer active and it seems the game was not carried out after all.