Test Drive: Unlimited is the first ever fully online racing experience for PSP, placing an incredible line up of licensed cars from 30+ of the world's most exclusive manufacturers into the hands of gamers. With unique online play, Test Drive: Unlimited is the first PSP racing game to allow gamers to play via the internet, with no compromise to the gameplay experience. Players connect to a server via WiFi, then challenge any racer anywhere in the world and battle it out to the finish line.

Source: play.com