Select the "Unlock Content" option at the "Extras" menu. Enter one of the following codes to unlock the corresponding bonus. Then, select the "Customize" option at the "Options" menu to activate the unlocked bonus.

Biker costume
Enter 1gb57M2x as a code.

Chef costume
Enter 51c24KiW as a code.

Gangster costume
Enter J5d99bPz as a code.

Kung Fu costume
Enter Ly11r98H as a code.

Mime costume
Enter 7qd33J1n as a code.

Velvet costume
Enter F9sT5v88 as a code.

Seventies costume
Enter S63bf2kd as a code.

Sixties costume
Enter M13Ni95L as a code.

Saucer attachments
Enter V81fvUW3 as a code.

Saucer skins
Enter X91mw7zp as a code.