Time travel through four versions of every zone, and two soundtracks depending on where you bought it.
Teams of three switched on the fly, speed, power and flight in one control scheme.
Open zones for the first time, with a grind rail bolted to a hillside and titans to climb.
An alien amusement park in orbit and the Wisp powers; the game that pulled the series out of its worst decade.
Two campaigns, the Chao garden, and City Escape - the last Sonic game Sega made for its own console.
Six characters, a killer whale and the Dreamcast's launch.
Classic and modern Sonic through the series' best levels; the birthday game.
Tails, the spin dash and Chemical Plant; the best of the Genesis Sonics.
Green Hill Zone at speed; Sega's answer to Mario in 1991.
Eleven out of thirty years: the Mega Drive run, the Adventure games, and the modern ones that are actually good.
The two halves that lock together into one long game; the peak of Genesis Sonic.
The Genesis Sonic made by fans, officially; the best Sonic since 1994.
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