Start game as usual. Prior to entering each of the following Need for Speed: Underground cheats, go to the main menu, go to the Statistics sub-menu, go back again (press [Delete]), and finally enter your desired cheat:
gimmesomecircuits - Unlock all circuits
gimmesomesprints - Unlock all Sprint circuits
gimmesomedrag - Unlock all Drag circuits
driftdriftbaby - Unlock all Drift circuits
gimmeppablo - Unlock Petey Pablo car (Mitsubishi Motors Eclipse)
havyamystikal - Unlock Mystikal car (Toyota Celica)
gotcharobzombie - Unlock Rob Zombie car (Nissan 350Z)
needmylostprophets - Unlock Lost Prophets car (Nismo Nissan Sentra)
119focus - Unlock car
893neon - Unlock car
899eclipse - Unlock car
371impreza - Unlock car
222lancer - Unlock car
922sentra - Unlock car
667tiburon - Unlock car
334mygolf - Unlock car
77peugeot - Unlock car
777rx7 - Unlock car
350350z - Unlock car
111skyline - Unlock car
221miata - Unlock car
2000s2000 - Unlock car
889civic - Unlock car
228supra - Unlock car
240240sx - Unlock car
342integra - Unlock car
239celica - Unlock car
973rsx777 - Unlock car
givemenismo - Unlock car
allmylvloneparts - Unlock all level 1 performance parts
allmylvl2parts - Unlock all level 2 performance parts
seemylvl2parts - Unlock all level 2 visual parts
slidingwithstyle - Unlock drifting physics
Hints
Easy drift points
Simply stay behind a car and watch the points rack up.
Easy style points
After you unlock the oval drift track, go into "Quick Race" and choose that track. Then, race around it using the handbrake to powerslide into the corners. Depending on how good you are, you will unlock rewards every time you fill your meter, which does not take too long.
Shortcuts
Look for alternate routes on your in-game map while driving. These can get you ahead of an opponent easily og shave off seconds on your timer. They will look like another road on the map, but sometimes are narrower. Most of the time these shortcuts will be hard to see or take, and can be extremely risky. At the beginning of the races that take place in front of the prison Samantha told you to race to for at reward, when the race starts, crash in the gate of the prison: It is an underground shortcut. Note: This only works after the race in which Samantha tells you to race to the prison in time for a reward.
Use rims that normally will not fit
Certain cars can only fit so big of a rim. For example, the Miata can only fit 17s, but if you get a car like Skyline put 20s on it and trade it in for the Miata. The Miata will now have the 20s that the Skyline had in it. Do not try to install any other rims on your new car because rimms will go back to the maximum sized allowed.
1998 Nissan Skyline GRT34
Select underground mode and complete at least the first 80 missions. A recommended car to use is the Acura RSX. You will then challenge Samantha. Defeat her under the medium difficulty setting and win the next drag race to unlock the 1998 Nissan Skyline GTR34.
Eddie’s Nissan Skyline
To unlock Eddie’s car in the end, keep winning style points. Note: It is faster to win them in drift. When your style meter maxes out, a message stating that you have won Eddie’s Nissan Skyline will appear.
Shoot smoke from nitrous
To make nitrous shoot out smoke, put your car in neutral, or at the beginning of the race press [Nitrous].