alternative reality game
n.β Β«ARGs, as theyβre called, use real-world cluesβfrom classified ads to answering-machine messages to URLs that show up in obscure placesβto help players solve puzzles so intricate they might take groups to crack. Initial entry points are called “rabbit holes.” Some recent and current alternative reality games.Β» ββAlternate reality games” by Monty Phan Newsday (Long Island, N.Y.) May 25, 2005. (source: Double-Tongued Dictionary)