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.
Time travel through four versions of every zone, and two soundtracks depending on where you bought it.
Two campaigns, the Chao garden, and City Escape - the last Sonic game Sega made for its own console.
An alien amusement park in orbit and the Wisp powers; the game that pulled the series out of its worst decade.
Infobox
