A remote control paintball gun system is disclosed which may include a hopper for containing paintballs of different densities, a paint ball gun barrel associated for receiving paintballs, a motorized, wheeled chassis, a cartridge mounted along a side of the gun barrel for powering the gun barrel and a remote control for controlling motion, transfer of the paint balls from the hopper to the gun barrel, and firing of a paintball. The remote control may include a control for selectively transferring a paintball in accordance with the paintball's density, from the first or second plurality of paintballs, to the gun barrel and may control elevation of the gun barrel. A method of playing paintball may include players who carry and fire hand held paintball guns to hit other players and one or more self propelled paintball gun for remote control operation.