Another thing that makes this game special is that it uses MSX-Music ("FM-PAC"), the Yamaha YM2413 OPLL sound chip, originally sold separately or built into various models of the MSX2+ and MSX turboR computers. This is the only game in which Konami used that particular sound chip; other Konami games with enhanced music use Konami's own SCC sound chip. Even games distributed on floppy disk were often accompanied by a SCC ROM cartridge, like Snatcher and SD Snatcher. The original music was composed by Goro Kin (supposedly a pseudonym).
