Gran Turismo 4 Cheats - PlayStation 2

cheat description		size
SAVEGAME FOR US VERSION Dec. 06, 2011		1.5MB
SAVEGAME FOR US VERSION Jul. 22, 2010		1.5MB
SAVEGAME FOR EUROPEAN VERSION Aug. 22, 2008		1.5MB
PHOTO TRAVEL MODE FAQ Apr. 15, 2006		8KB

Hidden Controls
There are a number of "hidden" controls in Gran Turismo 4 that will make navigating the game a bit easier:

Press [L1] on the main Gran Turismo Mode screen to jump the cursor to Home
Press [R1] on the main Gran Turismo Mode screen to jump the cursor to the country of your vehicle's manufacturer.
Press [Start] when looking at your garage to bring up the vehicle settings screen.
Press [Start] when changing your vehicle's settings to enlarge the Engine Power/Torque curve.
Press [Start] at the end of a series race to skip the finish times and championship points screens.
Press [L3] at any screen with scrolling text to pause it.
Press [L3] during a replay to fast-forward.
Press [X] during a pit stop, to to stop refueling, letting you get out of the stop faster.
Press any combination of [Left], [Right] and [Down] buttons on the D-pad to look in that direction while driving.

Secret Black Cars
The vehicle line-up in the used car showrooms is constantly changing. On the last week of the changing cycle--starting day 694--four secret black race cars appear in the showrooms. Two of the cars are in the Used Car Showroom I and the other two are in Showroom II, and they only appear for one week (Gran Turismo time). All four cars can be purchased for about Cr.8,500,000 total, which is an absolute bargain for these sort of race cars.

Unlock Dome Zero '78
Get all "Gold" ranks in the International A License test.

Unlock Ford Model T Tourer '15
Get all "Gold" ranks in the Super License test.

Unlock Honda Dualnote '01
Get all "Silver" ranks in the Domestic A License test.

Unlock Honda S500 '63
Get all "Gold" ranks in the Domestic B License test.

Unlock Jensen Healey Interceptor Mk.III '74
Get all "Gold" ranks in the International B License test.

Unlock Mazda Kusabi '03
Get all "Silver" ranks in the Domestic B License test.

Unlock Mazda RX-8 Concept (Type-II) '04
Get all "Silver" ranks in the International B License test.

Unlock Mercury Cougar XR-7 '67
Successfully complete the Super License test.

Unlock Nike One 2022
Successfully complete the International B License test.

Unlock Nismo 270R '94 (S14)
Successfully complete the International A License test.

Unlock Nissan GT-R Concept '01
Get all "Silver" ranks in the International A License test.

Unlock Nissan Skyline GT-R '01
Get all "Gold" ranks in the Domestic A License test.

Unlock Pontiac Solstice Coupe Concept '02
Get all "Silver" ranks in the Super License test.

Unlock Pontiac Sunfire GXP Concept '02
Successfully complete the Domestic A License test.

Unlock Volkswagen Lupo 1.4 '02
Successfully complete the Domestic B License test.

Unlock Audi Nuvolari Quattro
Complete 25% of the game to unlock Audi Nuvolari Quattro.

Unlock New cars and tracks
To unlock cars and tracks, compete in the GT Career mode. You can earn money there to upgrade your cars, and buy or sell new and used ones.

Transfer Files
If you have a save file from GT3 you can import money and licenses into GT4. You can transfer license qualifications but you do not receive the unlockable items that come with the license when you get them without importing. You can transfer money up to 100,000 dollars. This can only be done once.

Best Starting Car
To smoke the competition at the beginning of the game purchase the Mitsubishi Lancer Evolution GSR '92, on sale in the Used Car Showroom I.

Horse Power
When you buy or receive a new car, before driving it change the oil. This will increase the Horse Power of the car, which sometimes can be a pretty significant increase.

Use of NOS
If you install a NOS system on your car, you can tap into it by pressing the [R1] button. The Nitro guage is located to the right of the dash. Once it is empty, you will need to take a pit stop to refuel it or wait for it to slowly recharge.

Fast Racing For Fast Profit
Start out with any vehicle you like. When you make enough money to make your vehicle faster using the beginner hall, move over the the special conditions Hall. Defeat the first race (Rally d' Umbria) and you will receive a Cadillac CIEN '02. Get more money and put more power into your Cadillac CIEN '02 (you won't have to if you don't want to). The CIEN will gain almost 1000+ HP. Go to the second race with the CEIN in the Special Conditions Hall called Rally d' Capri. After you win that race you will get a Toyota RSC Rally Raid Car '02 which you can sell for more than $230,000+. Keep racing that race and keep making the money.

To obtain over 260,000 credits easily just take your best car and take it into the Rally d' Capri easy in the Special Conditions hall. Once you obtain the car sell it and you get over 260,000 credits. You can repeat this over and over and soon enough you should be able to afford anything you want.

Enter the European Hall event 1000 Miles! I recommend either the Ginetta G4 '64 (won from Beginner Lightweight K Cup) or the Chevelle SS 454 '70 (won from American Muscle Car Championship). Enter the Cote d'Azur race (I think the last one works just the same). Make sure your car's HP is near or above 200. Put it on B-spec, 5-Push, overtake, 3x speed. Come back after a couple hours (this works best if you leave it overnight). You should have won the race, along with 150,000 credits! This can also be done with the championship race, which is 4 races. 4 races times 150,000 credits plus 300,000 credit prize equals 900,000 credits. The prize car is crappy, but who cares, you have 900,000 credits from doing nothing!