Killer Instinct ROM Download for Super Nintendo (SNES) on Emulator Games. Play Killer Instinct game that is available in the United States of America (USA) version only on this website. Killer Instinct is a Super Nintendo emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Killer Instinct (V1.1), Killer Instinct (Beta) and Power Instinct as shown below. Killer Instinct works on all your devices in high quality.