Sonic & Knuckles ROM Download for SEGA Genesis (Genesis) on Emulator Games. Play Sonic & Knuckles game that is available in the United States of America (USA) version only on this website. Sonic & Knuckles is a SEGA Genesis emulator game that you can download to your computer or play online within your browser. You can also download free ROMs such as Sonic The Hedgehog 3, Sonic And Knuckles & Sonic 3 (JUE) and Sonic The Hedgehog 2 (JUE) as shown below. Sonic & Knuckles works on all your devices in high quality.