Lock-on, baby

It's widely known that Sonic and Knuckles (S&K) started out as the latter half of Sonic 3, but development constraints forced SEGA to split the game in two, putting S&K onto an innovative Lock-On cartridge that, when combined with Sonic 3, pieced the game back together into its original state. Now, with the announcement that Sonic the Hedgehog 4 is coming to WiiWare and will follow on from S&K's story, SEGA brings us the final piece of the Mega Drive collection.

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