Waking Up: Successfully complete the Neutral story line. Space Gadget Theme: Play the Space Gadget level. Sky Troops Theme: Play the Sky Troops level. Prison Island Theme: Play the Prison Island level. Never Turn Back: Successfully complete the Last Story in the Dark story line. Mad Matrix Theme: Play the Mad Matrix level. Lost Impact Theme: Play the Lost Impact level. Lethal Highway Theme: Play the Lethal Highway level. Lava Shelter Theme: Play the Lava Shelter level. Iron Jungle Theme: Play the Iron Jungle level. Heavy Dog/Blue Falcon Remixed Boss Theme: Defeat those Bosses.

Gun Fortress Theme: Play the Gun Fortress level. Glyphic Cannon Theme: Play the Glyphic Cannon level. Final Haunt Theme: Play the Final Haunt level. Event 4 Theme: Listen to the Event 4 Theme in Story mode. Event 3 Theme: Listen to the Event 3 Theme in Story mode. Event 2 Theme: Listen to the Event 2 Theme in Story mode. Event 1 Theme: Listen to the Event 1 Theme in Story mode. Egg Dealer Theme: Defeat Egg Dealer in the Neutral story line. Egg Breaker Boss Theme: Defeat Egg Breaker. Digital Circuit Theme: Play the Digital Circuit level. Diablon and Sonic Boss Theme: Defeat those Bosses. Devil Doom Boss Theme: Defeat Devil Doom. Death Ruins Theme: Play the Death Ruins level. Cryptic Castle Theme: Play the Cryptic Castle level.

Cosmic Fall Theme: Play the Cosmic Fall level. Circus Park Theme: Play the Circus Park level. Chosen One: Successfully complete the Semi Hero story line. Central City Theme: Play the Central City level. Black Doom Boss Theme: Defeat Black Doom. Black Comet Theme: Play the Black Comet level. Black Bull Boss Theme: Defeat Black Bull. Almost Dead: Successfully complete the Dark story line. All Hail Shadow: Successfully complete the Hero story line. All Of Me: Successfully complete the Last Story. Successfully complete the indicated task to unlock the corresponding song:ДЄir Fleet Theme: Play the Air Fleet level. Successfully complete both the Hero and Dark versions of a storyline to unlock the Level 2 weapons. Successfully complete the Semi Dark storyline to unlock the Satellite Laser. Successfully complete the Dark storyline to unlock the Samurai Blade. Successfully complete the Semi Hero storyline to unlock the Omochao Gun.

Successfully complete the Hero storyline to unlock the Heal Cannon. Use the Egg Vacuum to suck up 20 objects (enemies, etc.) to gain an extra life. Successfully complete the Neutral storyline with the Hero ending to unlock the Egg Vacuum. Successfully complete the Last Story to unlock the Shadow Rifle. Successfully complete every sixth stage in Story mode, defeat all Bosses at the end (all five Hero and all five Dark Bosses), and see all ten Hero and Dark story line endings to unlock the Last Story. Get an 'A' rank in all stages to unlock Expert mode.

Central city shadow the hedgehog