At the Press Start screen, press X, X, White, White, Y, Y, White, X, Y, Y, X, White.
Extra Money
At the Press Start screen, press Y, X, White, Y, X, White, X, X, Y, White, X, Y.
Ruputation
While at the "Press Start" screen, press Y, Y, White, X, X, White, Y, Y, Y, X, X, X.
Money for Free
This cheat takes a while but it's worth it. Once you have a truck successfully complete a mission, any mission is fine but the more money you earn on the mission the faster you'll gain money. After you have completed the mission. Save the game as you regularly would, then go to garage, profiles, save game, press B, then choose no to save game. This will put you back on the end of mission screen. After this don't save and keep doing it again, it'll work over and over.
Get $800
In mission mode, on the third challenge for the indian thing, find the Gold city and right below it is secret #3 which gives $800.
The Winch
To activate the winch, first buy one that can support your car then press the black button and hold it. While holding it a crosshair will appear aim with that the winch car be shot into a tree or a rock. If you want it to pull you press the A button, if you want it to release slack press the B button, and if you want it to detach press the black button again.
Twin Turbo
Become a member of the Jeep racing team and buy a prototype twin turbo. This will greatly increase you horsepower and torque. You can buy it for any make of vehicle, as long as your a member of Team DeGeniro.
Monster Truck
Become a member of the team with the monster truck. You will win just about every race! If your pretty good you will win all. This monster truck is the fastest car in the whole game.
A Game Inside Of A Game
On the ''Autumn Leaves'' track, there should be a zippy little pizza delivery car, and it is VERY fast. But I made a game out of it. Select 2 player mode, select your truck, let your friend select his or her truck, go to Autumn Leaves. And that's where it starts. Start following the pizza car, and follow it without stopping, the person that lasts the longest following the car and not stopping or losing sight of it, wins. Happy driving !
Get 2000+ Dollars
On Farm Road 109, from the start, make a left and drive into the water, in the middle of the pond you will find a treasure chest. Drive over it and you will get over 2000 bucks for use in career mode.
Fun With Water
This isn't really a hint, just something fun to do, go to the Quarry Lake track, and select your truck. From your starting position, turn around so your driving in the wrong direction, then just follow the track until you reach the abandoned house near the 1st to last checkpoint, then smash into the huge water tower next to the house, if you aim correctly, the tower will come smashing down on the home, although no damage will come to house or the tower, it is still real interesting.