Gumball 3000

Get All Modes:
At the "Press Start" screen quickly press Square, Square, Square, Left, Right, Down, Right, L1, Down, R2, R2

Get All Cars:
At the "Press Start" screen quickly press L1, L1, Left, Square, Left, Square, R2, Square, R2

Get All Maps:
At the "Press Start" screen quickly press Down, Down, Up, R2, R2, L1, R2, R2, Down, Square

Get All Challenge Tracks:
At the "Press Start" screen quickly press Down, Down, Down, L2, L2, Down, Right, R2, Square

Get Unlimited Time:
At the "Press Start" screen quickly press Down, Down, Up, Up, L2, Up, Up, Square

Get All Police Levels:
At the "Press Start" screen quickly press Left, Left, Square, L2, Square, Up, Up, Square, Left

Get Big Aluminum Mode:
At the "Press Start" screen quickly press Left, Up, Down, Right, Square, Square, L2, R2

Get All Steam & Gas turbines:
At the "Press Start" screen quickly press Up, Up, Down, Up, Square, R1, Down, L2, Square

Get Unlimited Damage:
At the "Press Start" screen quickly press L2, L2, R1, R2, Square, Up, Up, Square