. ▁One ▁power - up ▁doubles ▁the ▁player ' s ▁fire power , ▁three ▁power - ups ▁tri ples ▁the ▁player ' s ▁fire power , ▁and ▁five ▁power - ups ▁causes ▁sh ots ▁to ▁expl ode ▁on ▁impact ▁with ▁enemies , ▁greatly ▁a iding ▁combat ▁against ▁t ough ▁enemies ▁and ▁b oss es ▁that ▁take ▁many ▁hits ▁to ▁destroy . ▁There ▁are ▁a ▁variety ▁of ▁enemies ▁as ▁well ▁as ▁sub - b oss es ▁in ▁later ▁levels . ▁When ▁the ▁player ▁comple tes ▁all ▁six ▁levels ▁for ▁the ▁first ▁time ▁and ▁after ▁the ▁cred its ▁roll , ▁the ▁player ▁will ▁be ▁able ▁to ▁play ▁Hard ▁Mode ▁by ▁pressing ▁Select ▁instead ▁of ▁Start ▁from ▁the ▁title ▁screen . ▁ ▁Development ▁Sol ar ▁St ri ker ▁was ▁designed ▁by ▁Gun pe i ▁Y ok oi ▁and ▁Ke isu ke ▁Ter as aki , ▁and ▁developed ▁by ▁N intendo ▁in ▁co - operation ▁with ▁the ▁external ▁company ▁Min ak uch i ▁Engineering . ▁It ▁was ▁first ▁published ▁in ▁Japan ▁on ▁January ▁ 2 6 , ▁ 1 9 9 0 , ▁then ▁released ▁later ▁in ▁North ▁America ▁in ▁February , ▁and ▁finally ▁in ▁Europe ▁on ▁September ▁ 2 8 . ▁As ▁such , ▁it ▁is ▁one ▁of ▁the ▁few ▁scrolling ▁shoot ers ▁developed ▁by ▁N intendo . ▁ ▁Re ception ▁Sol ar ▁St ri ker ▁has ▁been ▁met ▁with ▁generally ▁favor able ▁reviews . ▁It ▁earned ▁an ▁overall ▁score ▁of ▁ 7 5 % ▁at ▁Game R ank ings . ▁Mean ▁Mach ines ▁described ▁Sol