Perplex City was an alternate reality game created by London-based Mind Candy and designed by Adrian Hon that ran from April 2005 to February 2007. The first "season" of the game had players looking for "The Receda Cube" (referred to as "the Cube"), a priceless scientific and spiritual artifact to the people of a fictional metropolis known as "Perplex City", which had been stolen and buried somewhere on Earth.