Maten Densetsu > Sega Genesis

The country of Japan has been destroyed by hordes of deadly demons and you must launch an attack on these ghastly lost souls deep in the district of Akihabara! Take your pick of five awesome warriors and hit the underground world that humans now inhabit to fight your way back to Shinjuku, collecting the precious ooparts items you find along the way to help win the demon war and beat the Maten Densetsu game!

More great titles fro this genre are easily found in the amazing form of Wonder Boy, Wonder Boy in Monster Land and badass Diablo!