Up to four players battle on one of 11 dynamic stages in battles based around free-roaming two-dimensional character movement. Unlike other fighting games, D.O.N uses a "tug-of-war" fighting system. Attacking opponents will knock glowing orbs out of them for players to collect, with a bar at the top of the screen indicating what percentage of the orbs in play each character possesses; the size and value of these orbs vary depending on the strength of the attack used. (wiki)