Need for Speed: Most Wanted

Unlock Castrol Ford GT:
Press Up, Down, Up, Down, Left, Right, Left, Right at the 'Press Start' screen. Unlock Porsche Cayman:
Press L, R(3), Right, Left, Right, Down at the 'Press Start' screen. Unlock Castrol Syntec Ford GT
Press Left, Right, Left, Right, Up, Down, Up, Down at the 'Press Start' screen. $10,000:
To an extra $10,000 in career mode have a Need For Speed Underground career game saved on your hard drive. After the prologue you will get $10,000.

Unlock Free upgrades:
Press Up(2), Down(2), Left, Right, Up, Down at the 'Press Start' screen. One Stop Shop Marker
Press Up, Up, Down, Down, Left, Right, Up, Down at the 'Press Start' screen. A special marker for the Junkman Engine part will appear in the back room of the One Stop Shop in career mode. This code can only be enabled once per career. Perfect Starts
The best way to get a perfect start is to floor it when the countdown starts. As soon as it reaches '1' let go. The needle should go down nicely into the middle of the perfect launch zone. Then floor it again when it says 'Go!'. This is a great way to get ahead of the pack at the start of a race. Submitted by: Chris

Additional cars:
Defeat the indicated Blacklist Boss to win the corresponding car. Aston Martin DB9: Blacklist Boss 7 Audi A3 3.2 Quattro: Blacklist Boss 15 Audi A4 3.2 FSI Quattro: Blacklist Boss 14 Audi TT 3.2 Quattro: Blacklist Boss 15 BMW GTR (Race version): Blacklist Boss 1 Cadillac CTS: Blacklist Boss 12 Corvette C6: Blacklist Boss 5 Corvette C6.R: Complete 100% of the game Dodge Viper SRT 10: Blacklist Boss 6 Ford GT: Blacklist Boss 4 Lamborghini Gallardo: Blacklist Boss 6 Lamborghini Murcielago: Blacklist Boss 4 Lotus Elise: Blacklist Boss 8 Mazda RX-7: Blacklist Boss 9 Mazda RX-8: Blacklist Boss 12 Mercedes-Benz CLK 500: Blacklist Boss 8 Mercedes-Benz SL 500: Blacklist Boss 11 Mercedes-Benz SLR McLaren: Blacklist Boss 3 Mitsubishi Eclipse: Blacklist Boss 14 Mitsubishi Lancer Evolution VIII: Blacklist Boss 11 Mustang GT: Blacklist Boss 12 Pontiac GTO: Blacklist Boss 10 Porsche 911 Carrera S: Blacklist Boss 7 Porsche 911 Turbo S: Blacklist Boss 5 Porsche Carrera GT: Blacklist Boss 3 Porsche Cayman S: Blacklist Boss 10 Renault Clio V6: Blacklist Boss 13 Subaru Impreza WRX STi: Blacklist Boss 9 Toyota Supra: Blacklist Boss 13 Vauxhall Monaro VXR: Blacklist Boss 10 Good car:
The best start car is the Cobalt SS. Use that car until you get the Eclipse. When you win Blacklist races, try for the three '?' markers. You can get cash or the pink slip car. If you get their car, go to the safe house and sell it. You can get good money by doing this, and get unique upgrades after you start getting into the visuals (after you switch from the Cobalt).
If you are low on cash, just defeat one of the opponents on the black-list. You will get two marks to use on several different things. Do not use them on the Uniques early in the game. Instead, use them on the middle or the left 'Random' choices. They should always come out to either be a big cash bonus or the opponent's pink slip.

Easy upgrades:
Before you can do anything, you must win the Burger King Challenge. When you win it, you will unlock all unique parts (also called Junkman parts). Get any car and put all the parts except performance. Once you have your car the way you desire, go to the performance shop. Max out your car by pressing X. Then, put the Junkman parts on. Max out your car again. Then put on the Junkman parts again. Your car should be fully upgraded. Mo' Money
When you're going to sell a car, always take it to the tune up shop and sell all the parts first. The selling price of the car is the same either way. Quick start
Pay close attention to your tachometer when launching from the start line. Grab a perfect launch to gain a few precious seconds. When the needle turns blue drop the clutch and hold on. Nitrous and grip
 

Hitting nitrous torques the chassis back, giving the rear tires immensely more weight under the new acceleration. The end effect is that you will go straight. If you find your tail sliding out or are about to spin out of control, hit your nitrous. You will be surprised at how fast you will get straight again. This is a great trick in combination with Speedbreaker. With the correct timing, there is no corner you cannot take at any speed. Recommended car tuning:
If you are performance tuning your car, try to raise 'Top Speed', 'Acceleration', and 'Handling' at the same time, and keep them even as much as possible.

Xbox Live gamer points:
Complete the following achievements in single player career mode to unlock the indicated number of Xbox Live Gamerscore points: Defeat Clarence Callahan 'Razor' (350 points): Defeat Blacklist Boss 1 Defeat Eugene James 'Earl' (25 points): Defeat Blacklist Boss 9 Defeat Hector Domingo 'Ming' (25 points): Defeat Blacklist Boss 6 Defeat Ho Seun 'Sonny' (10 points): Defeat Blacklist Boss 15 Defeat Isabel Diaz 'Izzy' (10 points): Defeat Blacklist Boss 12 Defeat Jade Barrett 'Jewels' (25 points): Defeat Blacklist Boss 8 Defeat Joe Vega 'JV' (85 points): Defeat Blacklist Boss 4 Defeat Karl Smit 'Baron' (25 points): Defeat Blacklist Boss 10 Defeat Kira 'Kaze' Nakazato (25 points): Defeat Blacklist Boss 7 Defeat Lou Park 'Big Lou' (25 points): Defeat Blacklist Boss 11 Defeat Ronald McCrea 'Ronnie' (100 points): Defeat Blacklist Boss 3 Defeat Toru Sato 'Bull' (200 points): Defeat Blacklist Boss 2 Defeat Victor Vasquez 'Vic' (10 points): Defeat Blacklist Boss 13 Defeat Vince Kilic 'Taz' (10 points): Defeat Blacklist Boss 14 Defeat Wes Allen 'Webster' (75 points): Defeat Blacklist Boss 5