Ever wish the original Sonic the Hedgehog had a little more... everything? That's what Megamix is—a fan-made remix of the classic that throws in new zones, playable characters (Tails and Knuckles!), and even some wild boss fights. It still feels like the Genesis game you remember, just cranked up a notch.

First thing you'll notice? The levels twist and turn in ways the original never did, with alternate paths and sneaky shortcuts. And yeah, playing as Knuckles gliding over gaps never gets old. Some of the new zones are brutal, though—good luck with that lava-filled nightmare.

It's the kind of hack that makes you realize how much untapped potential was in the original. Still runs smooth as butter on real hardware, too.