Burnout

Unlock every racers
Press R2, R2, R2, L1, Triangle, L2, L2, L2, R1, Square
on the title screen.

Unlock Free Run mode, Free Run Twin mode, Credits options
Finish the game once.

Unlock Face-off mode against the Roadster:
Finish championship mode once

Unlock Bus: Beat the bus in Face Off four
Unlock Roadster: Beat the Roadster in Face Off mode
Unlock Saloon GT: Beat the Saloon GT in Face Off three

Get Full bonus
Drive a lap without a single accidents

Unlock Towtruck
Play in championship mode and unlock Face Off Two,
after beat the Towtruck once.