Play as J. J. Sawyer
Successfully complete the game with an "S" rank in all levels to unlock J. J. Sawyer.

Play as Naomi
Successfully complete the Downtown level with a "B" rank to unlock Naomi.

Play as Oscar
Successfully complete the game with an "A" rank in all levels to unlock Oscar.

Play as The Insider
Successfully complete the Storage level with a "B" rank to unlock The Insider.

Stunt attack mode
Successfully complete story mode to unlock attack mode.

Alternate costumes
Complete one of the following tasks to unlock a third costume for the indicated character:

Ethan: Successfully complete stunt attack mode.
Kat: Successfully complete score attack mode with high scores in all levels.