Need for Speed: Underground

Unlock All Circuit Tracks
Down, R1, R1, R1, R2, R2, R2, Square.

All Drift Tracks
Press Left(4), Right, R2, R1, L2 at the main menu.

All Drag Tracks
Press Right, Square, Left, R1, Square, L1, L2, R2 at the main menu.

All Sprint Tracks
Press Up, R2(3), R1, Down(3) at the main menu.

Unlock 350Z
To unlock this car go to the main menu, then go to the Statistics sub-menu, go back again (pressing DELETE), then type 350350Z (Note: the Z must be capital)

Unlock Acura Integra
Enter R2, R2, R1, R2, L2, L1, Down, Up at the main menu. There is no confirmation sound.

Unlock Acura RSX
Enter R1, R2, Down, Left, Up, Right, Left, Right at the main menu. There is no confirmation sound.

Unlock Ford Focus
Enter Left, Right, Up, R1, R2, R1, R2, Up at the main menu. There is no confirmation sound.

Unlock Honda S2000
Enter Up, Up, Down, Down, Up, Left, Square, R2 at the main menu. There is no confirmation sound.

Unlock Hyundai Tiburon
Enter Left, Right, Left, Right, Up, Down, Up, Down at the main menu. There is no confirmation sound.

Unlock Subaru Impreza
Enter Up, Down, Down, Up, L2, Up, L2, Down at the main menu. There is no confirmation sound.

Unlock Petey Pablo Mitsubishi Eclipse
Enter Up, Up, Up, Up, Down, Up, Up, Right at the main menu. There is no confirmation sound.

Unlock Rob Zombie Nissan 350Z
Enter Up, Left, Up, Up, Down, Left, Up, Right at the main menu. There is no confirmation sound.

Unlock Nismo Nissan Sentra
Enter Up, Down, Up, Left, Down, Down, Up, Right at the main menu. There is no confirmation sound.

Unlock Nissan 240SX
Enter Up, Down, Left, Right, Square, R1, L2, R1 at the main menu. There is no confirmation sound.

Unlock Toyota Supra
Enter R1, R1, R2, R1, R2, R1, L2, L1 at the main menu. There is no confirmation sound.

Level 2 Preformance Parts
Go to the main menu and press R1, R1, R1, R1, R2, R2, Left, Right.

Unlock Mitsubishi Lancer:
In quick race mode, press Left(3), R1(2), R2(2), L2 at the main menu.

Unlock Lost Prophets Car:
In quick race, press Up(3), Right, Down(2), Up, Right at the main menu.

Nissian Skyline R34 GTR
Down, Down, L1, L2, L1, L2, L1, Down.

Unlock Mystikal Car
Up, Right, Up, Up, Down, Right, Up, Right.