Super Mario Brothers 2 (Alt 1) ROM Download for Nintendo Famicom Disk System (FDS) on Emulator Games. Play Super Mario Brothers 2 (Alt 1) game that is available in the United States of America (USA) version only on this website. Super Mario Brothers 2 (Alt 1) is a Nintendo Famicom Disk System emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Super Mario Brothers, Famicom Grand Prix II - 3D Hot Rally (Alt 1) and [BIOS] Family Computer Disk System (Rev 1) as shown below. Super Mario Brothers 2 (Alt 1) works on all your devices in high quality.