Best game in the Sonic scene ever, Sega should build a remake of this game in old school style!
This game is the fourth part in the MegaDrive / Genesis "Sonic the Hedgehog series.
It closes at the end of Sonic the Hedgehog 3, this contrast with Part 1 and 2. This game is because it is the continuation of Part 3 of the unique "lock-on" technology. For both parts together should undertake Sonic the Hedgehog 3 on the cartridge of Sonic & Knuckles are confirmed. This story will be played without interruption. Also there will be a few small changes are present in the in-game cinematics. An additional possibility is that you can play as Sonic, Knuckles, Tails, Sonic & Tails in Both of the games at all levels. For Sonic & Knuckles served now that the levels of the game now can be saved to.
It is also possible for the cartridge of Sonic the Hedgehog 2 to lock-on, and Knuckles to play in the game.
If another game will be locked on it will say "no way". If the player a certain key combination is pressed to allow the Blue Spheres Game to go.
This is the game that you come across during the bonus levels in the game itself.