Demon Sword ROM Download for Nintendo (NES) on Emulator Games. Play Demon Sword game that is available in the United States of America (USA) version only on this website. Demon Sword is a Nintendo emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Clash At Demonhead, Ninja Gaiden 2 - The Dark Sword Of Chaos and Robodemons as shown below. Demon Sword works on all your devices in high quality.