Abstract: Until now, GPS software has been used to show locations of people, places, or things. In location based mobile games, GPS is used to show local spots. ISPY's Target Mode uses GPS software in a new way. The most notable GPS function of iSPY, and the reason for my patent application, is what iSPY does during live engagements involving multiple players. Each of the many different weapons used in iSPY has a real-world range that is governed by GPS software. When players shoot each other, iSPY measures the distance between the 2 players/phones and uses this information to determine if the shot was taken with a weapon using the appropriate range, thus determining a hit or miss (i.e. if the target is 60? away, the shooter must use a weapon with at least a 60? range to score a hit).