Need for Speed : Underground - Cheat mode

All drag tracks:
Press Right, X, Left, R, X, L, White, Black at the main menu.

All circuit tracks:
Press Down, R3, Black3, X at the main menu.

All drift tracks:
Press Left4, Right, Black, R, White at the main menu.

All sprint tracks:
Press Up, Black3, R, Down3 at the main menu.

Drift physics for all cars:
Press R, Up3, Down3, L at the main menu.

Level 1 Performance Parts:
Press Black2, R2, Left, Right, Left, Right at the main menu.

Level 2 Performance Parts:
Press R4, Black2, Left, Right at the main menu.

Level 2 Visual Parts:
Press Down, Left, Up, Down, R, Black2, X at the main menu.

Level 3 Performance Parts:
Press Right, Left, White, click Right Analog-stick, press B, Left, Right at the main menu.

Level 3 Visual Parts:
Click Left Analog-stick, Right Analog-stick, press L, R, Y, B, Left at the main menu.

Acura Integra:
Press Black2, R, Black, White, L, Down, Up at the main menu.

Acura RSX:
Press R, Black, Down, Left, Up, Right, Left, Right at the main menu.

Ford Focus:
Press Left, Right, Up, R, Black, R, Black, Up at the main menu.

Honda S2000:
Press Up2, Down2, Up, Left, X, Black at the main menu.

Lost Prophets car:
Press Up3, Right, Down2, Up, Right at the main menu.

Mitsubishi Lancer:
Press Left3, R2, Black2, White at the main menu.

Mystikal car:
Press Up, Right, Up2, Down, Right, Up, Right at the main menu.

Nismo car:
Press Up, Down, Up, Left, Down2, Up, Right at the main menu.

Nissan 240SX:
Press Up, Down, Left, Right, X, R, White, R at the main menu.

Nissan 350Z:
Press Right2, Down, Up, X, L, R, White at the main menu.

Nissan Sentra:
Press Right3, White2, Black2, Up at the main menu.

Nissan Skyline:
Press Down2, L, White, L, White, L, Down at the main menu.

Petey Pablo car:
Press Up4, Down, Up2, Right at the main menu.

Rob Zombie car:
Press Up, Left, Up2, Down, Left, Up, Right at the main menu.

Subaru Impreza:
Press Up, Down2, Up, White, Up, White, Down at the main menu.

Toyota Supra:
Press R2, Black, R, Black, R, White, L at the main menu.

Unlockables:

1/111: Choice of first car

3/111: Drift Track 1

4/111: 2003 Mitsubishi Lancer ES; 14th and Vine Drag Track Reverse

5/111: Olympic Square Circuit Track Reverse

6/111: Performance Upgrade Level 1 Engine/Exhaust Packages; Performance Upgrade Level 1 Drivetrain Packages; Performance Upgrade Level 1 Tire Packages

7/111: TJ's Unique Reward: Engine/Exhaust Package Drivetrain Packages, Tires; Liberty Gardens Sprint Track Reverse, Option Magazine

8/111: 2003 Ford Focus ZX3; Atlantica Circuit Track

9/111: Performance Upgrade Level 1 E.C.U. and Fuel System; Performance Upgrade Level 1 Turbo Packages; Performance Upgrade Level 1 Brake Kits; 14th and Vine Construction Drag Track Reverse

11/111: Highway 1 Drag Track

12/111: Broadway Sprint Track, Visual Upgrade Level 2 Decals

14/111: Performance Upgrade Level 1 Weight Reduction Kits; Performance Upgrade Level 1 Suspension Packages; Performance Upgrade Level 1 Nitrous Oxide; Stadium Circuit Track; Atlantica Circuit Track Reverse

15/111: Autopress Magazine, Unique Hood from Samantha; G-Force, Formula-Style CF, Speed CF

16/111: Inner City Circuit Track Reverse

17/111: Hyundai Tiburon GT V6

18/111: Visual Upgrade Level 2 Neon

19/111: Market Street Circuit Track; Modified Mag; Rank 10 Circuit

20/111: 14th and Vine Construction Drag Track; Main Street Drag Track

21/111: Rank 10 Drag

22/111: 2003 Subaru Impreza 2.5 RS; Broadway Sprint Track Reverse; Rank 10 Sprint

23/111: Visual Upgrade Level 2 Paint; Lock Up Sprint Track

24/111: 5Zigen Vinyl; 2004 Nissan Sentra SE-R Spec V

25/111: Drift Track 3; Rank 10 Drift; Chrome and Flammen Magazine

26/111: 9th and Frey Sprint Track; TJ's Unique Reward: Brake Kits, Drivetrain Packages, Tires; Turbo Package, E.C.U. and Fuel System

27/111: Bedard Bridge Sprint Track; Rank 9 Sprint; Sport Compact Car Magazine

28/111: Visual Upgrade Level 2 Muffler Tips; Drift Track 4

29/111: Visual Upgrade Level 2 Window Tint

30/111: Performance Upgrade Level 2 Engine/Exhaust Packages; Performance Upgrade Level 2 Drivetrain Packages; Performance Upgrade Level 2 Tire Packages; National Rail Circuit Track

31/111: Visual Upgrade Level 2 Roof Scoops

33/111: 1992 Nissan 240SX SE; Rank 9 Drift

34/111: Visual Upgrade Level 2 Rims; 9th and Frey Sprint Track Reverse

35/111: Rank 9 Circuit

36/111: Rank 9 Drag

37/111: Rank 8 Circuit; Import Racer Magazine

38/111: Performance Upgrade Level 2 E.C.U. and Fuel System; Performance Upgrade Level 2 Turbo Packages; Performance Upgrade Level 2 Brake Kits; Drift Track 5

39/111: Visual Upgrade Level 2 Side Skirts

40/111: Rank 8 Drift; Import TUner Magazine

41/111: 2002 Toyota Celica GT-S; Rank 8 Sprint

42/111: Rank 8 Drag

43/111: Visual Upgrade Level 2 Hoods; Lock Up Sprint Track Reverse

44/111: Visual Upgrade Level 2 Front Bumpers

45/111: Visual Upgrade Level 2 Spoilers; National Rail Circuit Track Reverse

46/111: 2003 Acura RSX Type S

47/111: Samantha's Unique Reward: ; Enkei Silverstar 18, Enkei Arashi 18, Momo Vantage 18, O.Z. Superleggera 18, Livia 18

48/111: Performance Upgrade Level 2 Weight Reduction Kits; Performance Upgrade Level 2 Suspension Upgrades; Performance Upgrade Level 2 Nitrous Oxide

49/111: Super Street Magazine; Visual Upgrade Level 2 Rear Bumpers

50/111: Rank 7 Drift

51/111: Visual Upgrade Level 3 Decals

52/111: Rank 7 Circuit

53/111: 2000 Acura Integra Type R

54/111: Visual Upgrade Level 3 Muffler Tips

55/111: Main Street Drag Track Reverse; Rank 7 Drag; Turbo and High-Tech Performance Magazine

56/111: Visual Upgrade Level 3 Window Tint

57/111: Bedard Bridge Sprint Track Reverse; Rank 7 Sprint

58/111: 1999 Mitsubishi Eclipse GSX

59/111: Stadium Circuit Track Reverse; Rank 6 Circuit; Super Street Magazine

60/111: Visual Upgrade Level 3 Head Lights

61/111: Visual Upgrade Level 3 Tail Lights

62/111: Visual Upgrade Level 3 Neon

63/111: Rank 6 Drag

64/111: 1998 Toyota Supra; Rank 6 Drift

65/111: Visual Upgrade Level 3 Paint; Drift Track 6

66/111: Performance Upgrade Level 3 Engine/Exhaust Packages; Performance Upgrade Level 3 Drivetrain Packages; Performance Upgrade Level 3 Tire Packages

67/111: Rank 6 Sprint; Sport Compact Car Magazine

68/111: Samantha's Unique Reward: ; Samantha Custom 1-10

69/111: 2003 Honda S2000

70/111: Visual Upgrade Level 3 Hood Scoops; Main Street Construction Drag Track

71/111: Terminal Circuit Track; Rank 5 Circuit

73/111: 1995 Mazda RX-7; Rank 5 Drift

74/111: Spillway Sprint Track; Rank 5 Sprint

75/111: 2003 Nissan 350Z

76/111: Rank 5 Drag

77/111: Spillway Sprint Track Reverse; Samantha's Unique Reward: Dual GT, Duotek, Katana

78/111: 1st Ave. Truck Stop Sprint Track

79/111: 1999 Nissan Skyline R34 GTR

80/111: Performance Upgrade Level 3 E.C.U. and Fuel System; Performance Upgrade Level 3 Turbo Packages; Performance Upgrade Level 3 Brake Kits; Main Street Construction Drag Track Reverse

81/111: Visual Upgrade Level 3 Rims

82/111: Rank 4 Sprint

83/111: Commercial Drag Track; Rank 4 Drag

84/111: Visual Upgrade Level 3 Side Skirts; Market Street Circuit Track Reverse

85/111: Rank 4 Drift; Import Tuner Magazine

86/111: Terminal Circuit Track Reverse; Rank 4 Circuit

87/111: Rank 3 Drag

88/111: Rank 3 Circuit

89/111: Visual Upgrade Level 3 Hoods; Drift Track 7

90/111: Visual Upgrade Level 3 Front Bumpers; Port Royal Circuit Track

91/111: Performance Upgrade Level 3 Weight Reduction Kits; Performance Upgrade Level 3 Suspension Packages; Performance Upgrade Level 3 Nitrous Oxide; Port Royal Circuit Track Reverse

92/111: Maxi Tuning Magazine; Rank 3 Drift

93/111: Visual Upgrade Level 3 Spoilers; 7th and Sparling Sprint Track

94/111: 1st Ave. Truck Stop Sprint Track Reverse; Rank 3 Sprint

97/111: TJ's Unique Reward: Weight Reduction Kits, Brake Kits, Drivetrain Package, Tires, Suspension Package, E.C.U. Fuel System, Nitrous

98/111: Rank 2 Drag; Commercial Drag Track Reverse

99/111: Rank 2 Circuit

100/111: Rank 2 Sprint

101/111: Visual Upgrade Level 3 Rear Bumpers

102/111: Hot 4's Magazine

105/111: Drift Track 8; Rank 2 Drift

107/111: Rank 1 Circuit

108/111: Highway 1 Drag Reverse; Rank 1 Drag

109/111: Rank 1 Drift

110/111: 7th and Sparling Spring Track Reverse; Rank 1 Sprint

111/111: Samantha Unique Reward: Choice of Widebody Kits; Vapor, Mantis

112/111: Stuff Magazine