Sonic & Knuckles + Sonic the Hedgehog 3 is an online SEGA game that you can play at Emulator Online. This free Sega game is the United States of America region version for the USA. Sonic & Knuckles + Sonic the Hedgehog 3 is a single title from the many arcade games, skill games and sonic games offered for this console. If you enjoyed playing this, then you can find similar games in the sega games category. Sonic & Knuckles + Sonic the Hedgehog 3 game is from the various retro games on the site, and there are more games like this, including Sonic Mania Edition, Knuckles Chaotix 32X and Sonic the Hedgehog 3.