s from the
JGTC racing league compete on High Speed Ring. The game is centered on an open-ended design. The single player menu presents players with three variables: mode (Time Trial, Single Race, and Drift Trial), car, and track selection. Rewards such as credits and cars earned based on the difficulty, performance and number of laps they have chosen. Players can select from one to 99 laps.
Gran Turismo is centered on completing driving missions in order to advance in the game, unlike
Gran Turismo 4's open-ended map. The game uses a new trading system to allow players to acquire cars. There are 45 tracks (including layout variations) plus the added bonus of reverse on most tracks, which takes the track number to 72. For the first time in the series, the game features the use of custom soundtracks that enables players to play their own songs while racing, but this option must first be unlocked by completing section B or C of the Driving Challenges. The music tracks can be used for offline or online races. There are some hidden tracks which are removed prior to release (notably Smokey Mountain and Tahiti Circuit from
Gran Turismo 3: A-Spec - both which initially debuted in
Gran Turismo 2 with some differences). These tracks are only accessible on systems with modified firmware and running
Gameshark-like programs, and some issues have been reported with them. During an interview at E3, it was revealed that tracks featured in the game (such as
Valencia Ricardo Tormo) are directly sourced from
Gran Turismo 4 and
Tourist Trophy, while the game's physics engine is based on
Gran Turismo 5 Prologue.
Gran Turismo features 833 vehicles, each modeled accurately and statistics derived from their real life counterparts. The exotic car manufacturer
Ferrari is featured, and for the first time in the main
Gran Turismo series,
Lamborghini,
Bugatti and various other cars were introduced and fully licensed. There is no damage model in the game. Players begin with a low-powered car, but can upgrade to better cars as they progress through the game. The dealerships available change after every other race, so players will not always be able to buy what they are looking for. Four cars are featured in a race at any one time, the player car and three opponents (with the AI having improvements since
Gran Turismo 4). It was initially announced that
downloadable content (DLC) would not be released for
Gran Turismo, 1974
Lamborghini Countach LP400 and the 2002
Ferrari Enzo, were made available for download via the
PlayStation Store. In the game also the Ferrari F2007 has been added, in two different colors, which will go to compose, with the Formula GT, the second F1 car available in the game. Parts of the game are narrated by TV personality and car enthusiast
Jay Leno. The controls are unusual because the PSP does not have pressure sensitive buttons, meaning the player cannot control the degree of acceleration or braking. Creator Kazunori Yamanuchi was against the idea of using external controllers via PSP Plus for more accurate control, telling an interviewer "if you want to play on
Gran Turismo using a PS3 controller, you will have to play on
Gran Turismo 5". ==Development and marketing==