Sega Genesis / Mega Drive version
Sonic, the world's fastest hedgehog, continues his adventures in this fourth installment of the Sonic The Hedgehog series! This time, he buddies up with his former enemy, Knuckles the Echidna in order to defeat the evil Dr. Eggman (AKA Dr. Robotnik). At the end of Sonic The Hedgehog 3, Dr. Eggman’s ultimate orbital weapon for global domination, the Death Egg, was badly damaged in an epic battle with Sonic. The Death Egg, losing power rapidly, hurtled back down to the planet below and crash-landed on the mysterious Angel Island again. Now Sonic and Knuckles must put a stop to Dr. Eggman once and for all, before Eggman and his no-good-niks get the chance to find the secret to Angel Island’s floating power, the Master Emerald.