In Street Racer Underground, you have to earn money to upgrade your car and win races. Plus, you have to avoid the cops as well. Start out with a cheap new ride and upgrade it until it's maxed out. Hit as many checkpoints as you can in Endless mode to earn money, then try racing until you beat all the competition.
Luckily, your car comes with a nitro boost. To fill your nitrous, you must pass the traffic as closely as possible. Be careful not to hit them, though, because the police will catch you!
Control your street racer with arrow keys and spacebar for nitro, or use the mouse or touchscreen controls.
How much can you earn? Enough for a Ferrari or Lamborghini? The races get more challenging, but you can do it!