Need for Speed: Underground (NFSU) is a racing game, developed and published by Electronic Arts in 2003. It is part of the Need for Speed video game series. It was developed by EA Black Box. Its premise (highly tuned, customized cars participating in illegal street races) was likely inspired by the Import Scene and the movies The Fast and the Furious and 2 Fast 2 Furious. A complete reimagining of the series' formula, NFSU offered a career mode featuring a storyline, and a garage mode that allowed players to fully customize their cars with a large variety of brand-name performance and visual upgrades.

All races take place in a generic city at night (though the city bears some resemblance to New York, San Francisco and Los Angeles). Instead of hundred-thousand dollar exotics, Underground featured vehicles associated with the Import Scene. This, plus the increasingly arcade-like controls, became points of controversy for Need for Speed fans. Despite this, Underground was commercially very successful, and inspired a sequel. (Wikipedia)

Action Replay Codes

*Note: These codes won't work unless you use an Action Replay cartridge:

There are 9 codes for this game.

(M)
0E3C7DF2 1853E59E
EEA3EF5A BCA99C80

Max Cash
DEB42482 C19E7B82

Max Circuit Starts
DEB3A502 C19E7B82

Max Circuit Wins
DEB3A50E C19E7B82

Max Circuit Style
DEB3A50A C19E7B82

Max Style
DEB49C6A C19E7B82

Stacks Of Extras Unlocked A
DEB435E6 BEAB9D85
DEB435E2 BEAB9D85
DEB435CE BEAB9D85
DEB435CA BEAB9D85
DEB435D6 BEAB9D85
DEB435D2 BEAB9D85
DEB435DE BEAB9D85
DEB435DA BEAB9D85
DEB435E6 BEAB9D85
DEB435E2 BEAB9D85
DEB435EE BEAB9D85

Stacks Of Extras Unlocked B
DEB435EA BEAB9D85
DEB435F6 BEAB9D85
DEB435F2 BEAB9D85
DEB434FE BEAB9D85
DEB434FA BEAB9D85
DEB43486 BEAB9D85
DEB43482 BEAB9D85
DEB4348E BEAB9D85
DEB4348A BEAB9D85
DEB43496 BEAB9D85
DEB43492 BEAB9D85
DEB4349E BEAB9D85
DEB4349A BEAB9D85
DEB434A6 BEAB9D85
DEB434A2 BEAB9D85
DEB434AE BEAB9D85
DEB434AA BEAB9D85
DEB434B6 BEAB9D85
DEB434B2 BEAB9D85
DEB434BE BEAB9D85
DEB434BA BEAB9D85
DEB43446 BEAB9D85
DEB43442 BEAB9D85
DEB4344E BEAB9D85

Have Skyline From Start
DEB42492 BCA99B84

(Thanks to Codejunkies)

*Note: The screenshots below are taken from the GameCube version of the game.

Phat songs and phat cars right here: