Test Drive Unlimited PSP

In the world of Test Drive Unlimited, the player is able to drive both on-road and off-road in free-roam mode, challenging any real life racers they encounter. The roads are modeled after satellite images of the island of Oʻahu.The terrain differs from rainforest and mountains to sandy beaches and Hawaiʻi's capital city, Honolulu. It is worth noting however, that other built-up areas on the island are not represented. It is possible to drive on small islands outside of the main island, and even drive underwater (using glitches or mods) The latter requires the use of a known exploit in the game. The Xbox 360 version has supported steering wheel controllers since launch. Following the third free update, Test Drive Unlimited supports force feedback wheel controllers such as Microsoft's Xbox 360 Wireless Racing Wheel.

Although advertising material for the game suggests it to be an exact depiction of the Hawaiian island, numerous government buildings (such as those on Pearl Harbor, Camp H. M. Smith, Hickam Air Force Base), commercial buildings (Ala Moana Center, the convention center, the entire commercial strip in Pearl City and the Pearlridge Center), and notable landmarks (statue of King Kamehameha I, USS Missouri, etc.) are not present in the game. Many roads and highways are also missing or placed far from their real-life counterparts. The ships docked in Pearl Harborare also in very low detail and do not represent any active or retired USN vessel at all.