Metroid (Rev 1) [b] ROM Download can be obtained free for Nintendo Famicom Disk System on EmuGames.net only. Play Metroid emulator game in English for the USA region. Metroid (Rev 1) [b] is a Famicom ROM that you can download to your computer or play online within your browser. You can also download roms that work on all your devices in high quality such as Metroid Zero Mission, Super Metroid and Metroid Fusion.