Wolf Fang: Kuuga 2001 was released in Japanese arcades in 1991. It was released in arcades outside Japan and re-titled Rohga: Armor Force. The arcade versions outside Japan however, have a number of things cut. There is no story intermissions between the stages and there is no stage selection leading to 4 different endings found on the Japanese version, but the game cycles through all 12 stages like in the Japanese version's expert mode.