Sonic & Knuckles + Sonic The Hedgehog ROM for SEGA Genesis (SG). Sonic & Knuckles + Sonic The Hedgehog game is available to play online and only onRoms Games. Sonic & Knuckles + Sonic The Hedgehog ROM for SEGA Genesis requires an emulator to play the game offline. This Game is English (USA) Version and is the highest quality available.