Peach's Nightmare - No Mercy (Beta) (SMB1 Hack) ROM Download can be obtained free for Nintendo on EmuGames.net only. Play emulator game in English for the USA region. Peach's Nightmare No Mercy is a NES ROM that you can download to your computer or play online within your browser. You can also download roms such as Kirby Nightmare In Dreamland and Simpsons The Bart's Nightmare that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.