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The conclusion to the grand Death Egg saga, Sonic 3 & Knuckles is set on the Floating Island, where Dr.
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Sonic 3 & Knuckles is the original Sonic the Hedgehog 3 the developers originally intended to release to the public but time constraints and manufacturing costs by Sega resulted in the game being split into two separate titles. It is essentially a large combined game of its two lock-on components which contains all Zones from the said games and also contains special features unique to this version. Sonic the Hedgehog 3 & Knuckles ( ソニック・ザ・ヘッジホッグ3 & ナックルズ, Sonikku za Hejjihoggu Surī to Nakkaruzu ?), also known as simply Sonic 3 & Knuckles ( ソニック3 & ナックルズ, Sonikku Surī to Nakkuruzu ?), is a 1994 platform video game in the Sonic the Hedgehog series made for the Sega Genesis/Mega Drive, which is the result of combining Sonic & Knuckles with Sonic the Hedgehog 3 using the former cartridge's unique lock-on technology.