Play Sonic & Knuckles + Sonic the Hedgehog 3 emulator game online in the highest quality available. Sonic & Knuckles + Sonic the Hedgehog 3 is a Sega Genesis game that you can enjoy on Play Emulator. This SEGA game is the US English version that works in all modern web browsers without downloading. Sonic & Knuckles + Sonic the Hedgehog 3 is part of the Sonic Games, Arcade Games, and Action Games you can play here. PlayEmulator has many online retro games available including related games like Sonic Mania Edition, Sonic Advance 3, and Sonic the Hedgehog 3.