SpecTrek is an augmented reality ghost hunting game. SpecTrek was designed to have the user work-out whilst playing the game, the tag line for the game is "protect the world, stay in shape". There are three default games to play, short which lasts 15 minutes, medium which lasts for 30 minutes, and long which lasts for 60 minutes. SpecTrek projects ghosts at various locations on a Google map in either a predetermined search radius or a user defined search radius.
Source: Wikipedia, "[en.wikipedia.org/wiki/SpecTrek SpecTrek]", available under the CC-BY-SA License.