

Main article: Need for Speed: Underground 2/Soundtrack There are 3 different levels for each upgrade in each category (except for the bonus upgrade): Controls (5 normal upgrades / 1 bonus upgrade).Brakes (5 normal upgrades / 1 bonus upgrade).Rims & Tyres (2 normal upgrades / 1 bonus upgrade).Suspension (3 normal upgrades / 1 bonus upgrade).Chassis (3 normal upgrades / 1 bonus upgrade).Drivetrain (3 normal upgrades / 1 bonus upgrade).Turbo Charger (4 normal upgrades / 1 bonus upgrade).Engine (5 normal upgrades / 1 bonus upgrade).Intake & Exhaust (4 normal upgrades / 1 bonus upgrade).N20 System (2 normal upgrades / 1 bonus upgrade).The Performance Upgrades are divided into 10 categories for a total of 46 upgrades: After purchasing a performance part, players can install it in other vehicles without re-purchasing. Any car in this game can be upgraded to be very competitive to even the strongest production cars. Most important are performance mods, with which players can modify acceleration, top speed, and handling. However, players can now write their own lettering and put them on the windscreen, backlight, and bonnet.

Visual parts don't come separate, but in body kit sets only. Players don't get any benefits for customising their car visually as there's no Star Rating. After completing the first lap, the player has to swap their vehicle. Rally Relay - Players drive two laps around a circuit.Street Cross is greatly based on Street X. Street Cross - Racers will drive on a narrow indoor circuit containing mostly 90° and 180° curves.By passing through a gate, time and nitrous are added. Nitrous Run - To win the race, players need to get from one checkpoint (called "gate") to another.Lap Knockout Race - Any player that completes a lap in last place will be eliminated.The winner is the one that collected most drift points.


This mode is only playable with a manual transmission. Drag Race - In a long straight race, players accelerate their car up to max speed.The first three are merely race events with horsepower restrictions, while Car Spec allows only compulsory cars to take part in particular events. Circuit Race - This mode is divided into four classes: Master, Novice, Pro, and Car Spec.Statistics are viewable in the Driver Status screen in My Underground. The Underground Mode can be played in four difficulties. Players can either play both Underground Mode (Career) and Quick Race. Tuning is a major factor in gameplay to unlock more, both performance and visual parts, players need to collect 'Upgrade Points'. Race events take place only at night and players cannot access freeroam.
