Sonic Heroes

					
Metal Sheen
Hold A and Y after selecting a 2-player level to have a "metallic" skin covering over your team.
Super Hard Difficulty
Beat the game with 141 Emblems and all A ratings.
Theme Songs
"Follow me": Finish Team Rose story mode.

"Sonic Heroes": Unlocked by default.

"Team Chatoix": Finish Team Chatoix story mode.

"This Machine": Finish Team Dark story mode.

"We Can": Finish Team Sony story mode.

"What I'm Made Of": Finish Last Story.
Get 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
The Last Story
Collect all 7 Chaos Emeralds and finish all stories
Get 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
Japanese Voices
Change your Xbox's system language to "Japanese" and then start the game. The original Japanese voices will replace the American ones.
Team blast gauge recharge
While playing the game with either team sonic, dark, or etc. switch to fly formation then press and hold the x and y buttons at the same time. You will switch to power formation while the one who can fly will stay in the air until your gauge is power up by at least 35 percent. Do it as many times as you like.