A liquid-formed monster named Chaos, a fierce deity of destruction that craves Chaos Emeralds to become stronger, attacks and Sonic jumps in to get a little of the action. Sonic just returned from his last adventure when he hears police cars follows them to see what's up. The game was rereleased for PC via Steam in 2011. A version for Xbox Live Arcade and PlayStation Network was released in 2010 that was simply titled Sonic Adventure, though it could be upgraded into Sonic Adventure DX via downloadable content.
An updated version of Sonic Adventure that includes some additional content.
