1 9 9 1 , ▁Cin em aware ▁released ▁a ▁version ▁for ▁MS - D OS ▁( port ed ▁by ▁Level ▁ 9 ▁Comput ing ▁in ▁a ▁final ▁attempt ▁to ▁stay ▁in ▁business ▁before ▁they ▁ceased ▁operations ▁in ▁June ▁of ▁that ▁year ). ▁These ▁versions ▁were , ▁apart ▁from ▁minor ▁p alette ▁differences , ▁identical ▁to ▁the ▁original . ▁ ▁A ▁S ega ▁Gen esis / M ega ▁Drive ▁version ▁was ▁to ▁be ▁released ▁in ▁ 1 9 9 0 , ▁but ▁was ▁cancel led . ▁It ▁is ▁an ▁overhead ▁shoot er ▁with ▁the ▁main ▁protagon ist ▁running ▁around ▁on ▁foot , ▁although ▁it ▁features ▁more ▁free ▁ro aming ▁game play ▁than ▁traditional ▁scrolling ▁shoot ers . ▁Among ▁the ▁differences ▁in ▁play ▁mechan ics , ▁the ▁S ega ▁version ▁allowed ▁the ▁player ▁to ▁create ▁power ups ▁that ▁were ▁fashion ed ▁by ▁collect ing ▁mach in ery ▁pieces ▁and ▁joining ▁them ▁together ▁in ▁different ▁combinations . ▁The ▁story line ▁also ▁diff ers ▁from ▁the ▁game , ▁instead ▁casting ▁the ▁player ▁not ▁as ▁the ▁scient ist ▁from ▁the ▁original ▁but ▁as ▁a ▁te en age ▁p est ▁control ▁worker ▁known ▁as ▁B uzz ▁who ▁makes ▁a ▁variety ▁of ▁impro vis ational ▁weapons ▁with ▁various ▁materials ▁combined ▁with ▁his ▁p est ▁control ▁equipment . ▁Although ▁the ▁S ega ▁version ▁was ▁never ▁actually ▁offered ▁for ▁sale , ▁it ▁was ▁distributed ▁as ▁a ▁R OM ▁image ▁( for ▁use ▁with ▁console ▁em ul ators ) ▁from ▁the ▁Cin em aware ▁website ▁after ▁the ▁turn ▁of ▁the ▁ 2