- Xbox 360
Unlock Characters:
Complete the following tasks to unlock the corresponding playable character in Versus mode.
Chao:
Beat ALL of Tails' levels with an 'A' rank.
Amy:
Beat ALL of Sonic's levels with an 'A' rank.
Big:
Get A ranks on ALL of Eggman's stage.
Chaos 0:
Beat ALL of Rouge's levels with an 'A' rank.
Mecha Sonic:
Beat ALL of Shadow's levels with an 'A' rank.
Tikal:
Beat ALL of Knuckles' levels with an 'A' rank.
Alternate Sonic in Kart Mode:
When you complete ALL of Sonic's stages and missions you will unlock him in the PSO suit in Kart mode.
Unlock Last Stage:
When you manage to successfully complete the Hero and Dark side story modes and then enter Story mode a 'Last Stage?' option will appear on the menu between the Hero and Dark selections.
Unlock Green Hill Zone:
When you have collected 180 emblems and got an A-Rank on ALL of them you will be able to play the 3D version of Green Hill Zone.
Avatar Awards:
Complete the following tasks to earn the corresponding Avatar Award.
2G Vintage Sonic Tee:
Play the game for 5 hours in any game mode.
Sonic's 2G Hi-Speed Shoes:
Play the game for 10 hours in any game mode.
Unlock Multiplayer Characters:
Collect ALL 180 Emblems to unlock the following hidden Multiplayer characters:
Racing: Hero
Sonic
Space Sonic
Amy
Racing: Dark
Shadow
Space Shadow
Mecha Sonic
Shooting: Hero
Tails
Space Tails
Choa
Shooting: Dark
Eggman
Space Eggman
Big
Hunting: Hero
Knuckles
Space Knuckles
Tikal
Hunting: Dark
Rouge
Space Rouge
Chaos