Amy Rose -
All "S" Ranks on Soleana mystery missions.
Audio Room
-
Complete Sonic, Shadow, or Silver's story 100%.
Blaze the Cat
-
Pass all Soleana mystery missions.
E-123 Omega -
All "S" Ranks on GUN Commander missions.
'Extras' Menu
-
Complete either Sonic, Shadow, or Silver's story 100% to unlock the
Extras menu on the main menu.
Knuckles the Echidna -
All "S" Ranks on Town Stage missions.
Last Episode
-
To Unlock the Last Episode, beat Sonic's Episode, Silver's Episode, and
Shadow's Episode.
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.
Theater Room
-
Complete Sonic, Shadow, or Silver's story 100%.