The Sony PlayStation Portable shifts into high gear with Gran Turismo for some high-octane, on-the-go fun. This PlayStation 2 console-port Gran Turismo 4 sees the inclusion of Ferrari, Maserati, Bugatti, and Lamborghini to the list of cars available. But sadly Porsche is still missing from the line-up. The game boasts an impressive 800 cars, including the Subaru Impreza, Mini Cooper, Honda NSX Type R, Ford GT and Audi TT Coupe 3.2 Quattro. Unfortunately for Steven McQueen fans, there's no '68 Ford Mustang 390 CID Fastback from the movie Bullitt, but a later model of the Dodge Charger R/T 440 is driven by the hit men. Each car is designed to handle exactly as its 'real world' counterpart would. Developer Polyphony Digital has recreated each car according to strictly engineered specifications and has taken into account details such as weight, speed, friction, and wind to create realistic simulations. Gamers can choose their favourite vehicle and race it on more than 30 tracks that include Nurburgring Nordschleife, Tsukuba Circuit and Mazda Raceway Laguna Seca. For something a little more scenic, there are the streets of New York City, the Grand Canyon and the ice-capped mountains of the Swiss Alps. One major surprise is the omission of the career mode that the franchise pioneered and is most well-known for. Rather, gamers have a single-player quick-race mode that allows them to choose the type of racing challenge (speed trials, drift trials and two-lap races), the car they want to drive and the track on which to race. Placing in the top three earns credits that can be spent on new cars. Challenge Mode is also a good place to earn extra credits to spend on buying new cars. Players can also race and trade cars with friends via the Wi-Fi Ad Hoc multiplayer mode, but unfortunately there is no online play. The graphics are good for a PSP game, and you can even load your own soundtrack. In short, this is a 'must have' for any PSP owner.