Metroid Mario game is a ROM you can play online within your browser. This Nintendo ROM runs in our top-notch quality emulator at PlayRoms.net only. Play Metroid Mario NES game online in English USA version on your desktop, tablet, and mobile. If you liked playing this emulator then you will also be interested in similar classic titles Metroid Fusion and Super Metroid. This free game belongs to the Metroid and Platform category of online retro games.