Invasion is a location based cell phone game that allows multiple people to play a game similar to capture the flag by just using their cell phone. The phone plot the other players on a live map and exchange data through a custom web backend that stores all the game data and player locations. Any user can easily set up a game and invite other players to join with a custom access code, and once the game begins teams are dynamically assigned and flags are able to be placed using the player's locations. This allows the games to be played on any terrain with a GPS signal, and allows for infiniite varity in the size and makeup of the playing field.