About the park: Mount Royal Park is one of Montreal's largest greenspaces. The park, most of which is wooded, was designed by Frederick Law Olmsted, who also designed New York's Central Park, and inaugurated in 1876.

These are the opening words of a phantom phone call that will set an intrepid group of cell-phone adventurers on a perilous quest around Mount Royal to discover the whereabouts and identities of eight restless ghosts who have escaped their eternal cemetery dwellings and are wreaking havoc upon the city's telecommunications system. Participants will spend one thrilling night scouring the mountain park to encounter and capture the wayward spirits with their phones to help them rest a little more peacefully and ensure that the city's population can once again place their trust in the phone lines.

The Haunting, developed as part of the Mobile Digital Commons Network (MDCN), is an innovative location-based mobile experience ghost-capture game that utilizes bluetooth beacons and the Mobile Experience Engine (MEE) software as well as GPS locative technology to develop an engaging experience for mobile phone users. MDCN's engineering team developed both the beacons and the MEE engine. Players, alone or in pairs, roam the game-space of the mountain searching for GPS-bluetooth hot spots where the ghosts are buried. Entering the GPS zone triggers a sequence of sounds and images to inform of a supernatural presence: the phone starts flashing or vibrating, animations appear and spooky sounds taunt you. Instructions are given on how to capture the ghosts on the phone and what to do to continue the game. Players can keep track of their movements on the mountain via a map that indicates their location in relation to the ghosts. An inventory counter reminds players how many ghosts they have left to capture. For safety's sake, a warning is sounded if players leave the game's boundaries or are approaching a cliff or other dangerous location.