Stunt attack = Complete story mode to unlock this mode
Unlock naomi = Get a grade B on the Downtown level
Unlock the insider = Get a grade B on the Storage level
Unlock oscar = Get a grade A on all levels
Unlock JJ Sawyer = Get a grade S on all levels
Ethans costume c = Complete all levels in stunt attack mode
Kats costume c = Get a high score on every level on score attack mode