Are there cheats for need for madness 2

This only works for some levels and I did not make it up. You just go to any level that you can get a car with, like level 16. Then you play level 16 or the other levels once dumbly, then you close need for madness and open it again and you will automatically have the next level/car. ( This only works for some levels) also i didn't make this one up or create it