Ingress, Google’s augmented reality game, hits iPhone and iPad | iMore
Ingress is the game I’ve been playing for the last 18 months or so. Very much a social oriented game I’ve also managed to lose about 18 pounds and gotten in much better shape playing.
Think geocaching mixed with War or King of the Hill.
Check out the link and download it. Ingress is free (except for your time and possibly gas…)