Clusterball could be described as an interesting combination of American football and a flight simulation. Players pilot aircraft across 3D landscapes, collecting colored balls of various point values. Collected balls form a line behind the craft. The more balls that are collected, the longer the line and the slower the aircraft moves. Flying through a special goal hoop converts balls to points. Opposing players can see how many potential points competitors have collected by the number of balls behind an enemy's plane, making it easy to determine the greatest threats and intercede with such power-ups as Superboosts, Tractor Beams, and Ball Snatchers. ~ T.J. Deci, All Game Guide