Need For Speed Underground

Completion bonus:
Successfully complete Go Underground mode to unlock all cars and upgrades.

Hint: Recommended cars:
The first car that you should buy is the Subaru Impreza. The second best car to race would be the Toyota Celica. With the Celica, you should be able to be number one in drift, circuit, and drag racing.
Information in this section was contributed by Marcos Morales.

Hint: Fast getaway:
When racing in Underground mode or against a friend, never use the emergency brake (L). Using it will almost make you come to a complete stop, allowing your opponent to pass you. The best way is to just let off the gas for a few seconds before your next turn.
Information in this section was contributed by Michael Suput.

Hint: Easy drag race win:
When you are taking part in a drag race (either in quick race or underground mode), someone might overtake you even if you are driving a GTR . Try to knock him out of commission by crashing into the back or side of his car. This is very useful when someone drives faster or has a better car. However, the CPU may also use this trick.
Information in this section was contributed by au chichun.

Glitch: Free roam:
Select Underground or Quick Race mode. Enter a sprint race on the "Spillway" track. It is the last track on the Sprint menu. When the race starts, ignore winning completely and instead drive backwards from the starting line down the track. Ignore the "turnaround arrows". Once the turnaround arrows disappear you will find that if you keep driving, almost all of the blockades preventing you from going down certain streets in other races will have disappeared. You can now drive anywhere in the city.
Information in this section was contributed by Gerald Gabriel.

Glitch: Morph cars:
Select "Quick Race" from the menu. Then, choose any car (for example, the Nissan Skyline). Press A, and "Select Car?" will appear. Choose "Yes", and as soon as you select it, hold Left pad until you can see the Mazda Rx-7. The screen should fade away, and the car you are left with is a car that drives like an Rx-7 but resembles a Skyline. You can notice this better if you make the Mazda Red with all upgrades, and the Skyline White with no upgrades. You can do this with any two cars on the game, but if the cars are more than four spaces apart, the screen will fade away before you can get to it. For example, you cannot morph a Celica with a Skyline.
Information in this section was contributed by John Mayor.

Glitch: Always win Sprint race:
When you are challenged for a Sprint race, choose 9th and Frey. As the race begins, drive backwards ignoring the backward sign (represented as a yellow arrow on the top of the screen). Keep going and eventually the sign will disappear and reappear. If done correctly, it will take you approximately twenty seconds to complete the race with no performance upgrades. You should always win.
Information in this section was contributed by alan rice.