Parallel Kingdom is a medieval role playing game that uses location services to allow users to play in a virtual world overlaid on top of the real world.

Using an iPhone or Google Android cell phone, Parallel Kingdom knows of a users physical location enabling a virtual character to move around in that area of the virtual world. Users can attack, trade, or mingle with people around them, and can pick on friends, build kingdoms, go on raids, wage war, or establish economic empires.

The game comes from PerBlue, a Madison, Wisconsin software company specializing in applications for the iPhone, Google Android and Windows Mobile.

The graphics are fairly basic, but it’s an interesting mashup/ idea that marries geopresence with mobile gaming and could quite easily gain cult status. See also WiFi Army, Parallel Kingdom’s main competitor.