"Theme of Prontera" is one of the official soundtrack of the online role-playing game, Ragnarök Online. to as RO, is a Korean massive multiplayer online role- playing game or MMORPG Theme of Prontera (with Voice) ♫. Green color is not implemented yet in iRO. 08, Theme of Prontera, Prontera, soundTeMP, Special Edition . , Voices, Buwaya Cave.