Sonic the Hedgehog Cheats - Xbox 360

Achievements
Complete each achievement to get the allotted gamerscore:

Blue Phantom (20) - Super Sonic Obtain the all moves.
Dark Hero (50) - Meet all the requests with magnificent skill.
Elite Agent (40) - Complete all the tasks given as agent.
Gold Medalist (50) - Collect all the Soleanna legendary Gold Medals.
Legend of Soleanna (100) - Overcome all trials and accomplish a great feat.
Nights of Kronos (60) - Unlock the complete ending to the last hidden story.
One to Reach the End (20) - End the last hidden story.
Psychic Soldier (20) - Obtain all the power to save the future world.
Shadow Episode - Cleared (30) - Clear Shadow Episode!
Shadow Episode: Completed (40) - Clear unlocked Shadow difficult level mission.
Shadow Episode: Mastered (60) - Clear all unlocked Shadow ACT Missions with Rank S.
Silver Episode: Cleared (30) - Clear Silver Episode!
Silver Episode: Completed (40) - Clear unlocked Silver difficult level mission.
Silver Episode: Mastered (60) - Clear all unlocked Silver ACT Missions with Rank S.
Silver Medalist (50) - Collect all the Silver Medals scattered around Soleanna.
Silver The Liberator (40) - Solve all the mystery in Soleanna.
Silver The Savior (50) - Reveal all the secrets with your ultimate power.
Soleanna's Blue Wind (50) - Solve all the problems swiftly.
Soleanna's Hero (40) - Solve all Soleannans' problems.
Sonic Episode: Cleared (30) - Clear Sonic Episode!
Sonic Episode: Completed (40) - Clear unlocked Sonic difficult level mission.
Sonic Episode: Mastered (60) - Clear all unlocked Sonic ACT Missions with Rank S.
Ultimate Life Form (20) - Resurrect the ultimate power from the lost memory.

Unlock Music
Upon completing each story, you unlock that specific characters theme in the Audio Room:

Elise's Theme - 100% The Last Episode
Shadow's Theme ("All Hail Shadow") - 100% Shadow's Episode
Silver's Theme ("Dreams of An Absolution") - 100% Silver's Episode
Sonic's Theme ("His World") - 100% Sonic's Episode

Unlock Characters
Meet certain requirements in Sonic's story to unlock Shadow and Silver's stories:

Shadow The Hedgehog - Complete 'Crisis City' with Sonic
Silver The Hedgehog - Complete 'Silver The Hedgehog' boss battle with Sonic

Free Mode
To unlock Free Mode, you must S rank all of Sonic, Shadow, and Silver's levels, bosses, and town missions. You can also play as the amigos in this mode aswell.

Last Episode
To unlock the Last Episode, beat Sonic's Episode, Silver's Episode, and Shadow's Episode.

Unlock 'Extras' Menu
Complete either Sonic, Shadow, or Silver's story 100% to unlock the Extras menu on the main menu:

Audio Room - Complete Sonic, Shadow, or Silver's story 100%
Theater Room - Complete Sonic, Shadow, or Silver's story 100%

Unlock Characters
Meet certain requirements in Sonic's story to unlock Shadow and Silver's stories:
Amy Rose - All "S" Ranks on Soleanna mystery missions.
Blaze the Cat - Pass all Soleanna mystery missions.
E-123 Omega - All "S" Ranks on GUN Commander missions.
Knuckles the Echidna - All "S" Ranks on Town Stage missions.
Miles "Tails" Prower - Pass all Town Stage missions.
Rouge the Bat - Pass all GUN Commander missions.
Shadow The Hedgehog - Complete 'Crisis City' with Sonic.
Silver The Hedgehog - Complete 'Silver The Hedgehog' boss battle with Sonic.