9 3 ▁for ▁the ▁Super ▁N ES ▁( SN ES ). ▁ ▁The ▁game ▁features ▁six ▁different ▁weapons ▁to ▁combat ▁the ▁Bio Met als , ▁an ▁extr ater rest rial ▁race ▁determined ▁to ▁destroy ▁the ▁human ▁race . ▁The ▁game play ▁is ▁very ▁similar ▁to ▁that ▁of ▁the ▁R - Type ▁series , ▁with ▁the ▁final ▁b oss ▁even ▁greatly ▁res emb ling ▁and ▁behav ing ▁similarly ▁to ▁that ▁series ' ▁icon ic ▁b oss ▁enemy ▁Dob ker at ops . ▁Bio Met al ▁is ▁unique ▁in ▁that ▁its ▁sound track ▁for ▁the ▁European ▁and ▁North ▁American ▁versions ▁was ▁entirely ▁created ▁by ▁te ch no ▁group , ▁ 2 ▁Un limited ▁( the ▁se lections ▁used ▁for ▁Bio Met al ▁were ▁rem ix es ▁of ▁songs ▁from ▁their ▁ 1 9 9 1 ▁album , ▁Get ▁Re ady ! ). ▁ ▁The ▁Japanese ▁version ▁of ▁the ▁game ▁featured ▁an ▁entirely ▁different ▁sound track . ▁ ▁A ▁sequ el ▁called ▁Bio Met al ▁Gust ▁was ▁released ▁for ▁the ▁S ega ▁Sat urn ▁in ▁ 1 9 9 7 , ▁included ▁with ▁the ▁De za emon ▁ 2 ▁pack . ▁ ▁Story ▁ ▁It ▁is ▁the ▁year ▁GC ▁ 2 3 2 ▁( G al axy ▁Century ▁Year ▁ 2 3 2 ). ▁A ▁huge ▁war ▁that ▁had ▁begun ▁years ▁and ▁years ▁before ▁has ▁divided ▁the ▁Mil ky ▁Way ▁and ▁all ▁of ▁its ▁natural ▁resources ▁have ▁been ▁exha usted . ▁The ▁Mil ky ▁Way ▁Gal actic ▁Council ▁is ▁forced ▁to ▁send ▁a ▁fleet ▁of ▁star