A location-based game (or location-enabled game) is a type of pervasive game in which the gameplay evolves and progresses via a player's location. Thus, location-based games must provide some mechanism to allow the player to report their location, frequently this is through some kind of localization technology, for example by using satellite positioning through GPS. "Urban gaming" or "street games" are typically multi-player location-based games played out on city streets and built up urban environments. Various mobile devices can be used to play location-based games; these games have been referred to as "location-based mobile games", merging location-based games and mobile games.