Double Dragon II: The Revenge[a] is a side-scrolling beat 'em up produced by Technōs Japan released in 1988. It is the first sequel to Double Dragon. The sequel involves Billy and Jimmy Lee in a mission to avenge Billy's girlfriend Marian after she is shot to death by the Black Warriors leader Willy, who is retaliating against the Lee brothers after his defeat at the end of the previous game. (wikipedia.org)