Play Sonic the Hedgehog (USA, Europe) [Hack by Stealth Rev 1] (~Knuckles the Echidna in Sonic the Hedgehog) Online

Sonic the Hedgehog, originally developed by Sonic Team and published by Sega, was released for the Genesis in 1991. This particular version is a ROM hack that replaces Sonic with Knuckles the Echidna, offering a fresh way to revisit the classic levels. It fits right into the era of early 90s platformers, where speed and precision were key, but it remixes the experience just enough to feel distinct.

You control Knuckles, who can run, jump, and glide through familiar zones like Green Hill and Marble Zone. Your goal remains the same: defeat Dr. Robotnik and free the animals he has trapped. Knuckles' glide lets you cover horizontal gaps with ease, and his ability to climb certain walls opens up shortcuts and alternate routes. The pacing is faster in some sections thanks to these moves, though the level design wasn't built for him, which creates some awkward moments. It feels like rediscovering an old favorite with a slightly different set of rules.