Need For Speed can actually be challenging to beat however I found this handy reference need for speed cheats guide that pushed me through my rise to the top of the game.
need for speed cheats are typed at the main menu. A confirmation message will display when a cheat code is entered with no errors.
In Cheat Mode, Start up your game and proceed to the screen that displays "Click to continue" or "Main menu". need for speed cheats can then be entered for the desired effect.
You will have to enter the cheat codes in blindly because there is no dialog box on screen. If you input a single code wrong, you are messing up your chances typing any future cheats. If you are sure you made a mistake entering the need for speed cheats, you'll have to restart the game for the cheats to take effect again.
In the guide you will gain cheats for all of the Need For Speed video games, on all platforms. All games from Need For Speed Underground to Need For Speed Most Wanted, Carbon,etc. on Xbox 360, Sony PSP, DS, Wii, PC, Xbox, PS3 and more.