Last Story:
Collect all 7 Chaos Emeralds and finish all stories.
New 2P Modes:
2P Action Race Unlocked from start.
2P Bobsled Race Collect 80 emblems.
2P Expert Race Collect 120 emblems.
2P Quick Race Collect 100 emblems.
2P Ring Race Collect 60 emblems.
2P Special Stage Collect 40 emblems.
2P Team Battle Collect 20 emblems.
Metal Sheen:
Hold A and Y after selecting a 2-player level to have a "metallic" skin covering over your team.
Metallic Characters:
Collect all 141 emblems
Super Hard Difficulty:
Beat the game with 141 Emblems and all A ratings.
CG Threatres:
Team Chaotix Cinema:
Complete Team Chaotix in Story Mode.
Team Dark Cinema:
Complete Team Dark in Story Mode.
Team Rose Cinema:
Complete Team Rose in Story Mode.
Team Sonic Cinema:
Complete Team Sonic in Story Mode.
Sonic Heroes Song:
Unlocked at start
Follow Me Song:
Complete Story Mode as Team Rose
This Machine Song:
Complete Story Mode with Team Dark
We Can Song:
Complete Story Mode with Team Sonic
What I'm Made Of Song:
Complete the last story