Cars

All races:
Enter MATTL66 as a code.

All cars:
Enter YAYCARS as a code.

All tracks and mini-games:
Enter IF900HP as a code.

Maters Speedy Circuit and Maters Countdown cleanup:
Enter TRGTEXC as a code.
Jason Anderson.

Super fast start:
Enter IMSPEED as a code.
chimpysunk.

Unlimited boost:
Enter VROOOOM as a code.
toi, tpe easrc bdiyty uicpemy.

All movies:
Enter WATCHIT as a code.
harrises.

All concept art:
Enter CONC3PT as a code.
harrises.

Hint: Avoid getting lost:
If you ever get lost in the desert, follow Mater or any other car without bumping into them. They will take you back to Radiator Springs.
Jordan Miller.

Hint: Lightning bolt:
The first stripe (near the fire house) of the new road is actually a lightning bolt.
IdaFatBoy.

Glitch: Sinking cars:
In Story mode, go to Ornament Valley. Follow the train tracks until you get to the big curve. Wait for a car to appear then drive into it. The car's wheels will sink into the ground and it will not move. If you hit Sarge's front he will sink into the ground and will not be there any more.
casamac.

All paint jobs:
Enter R4MONE as a code.
This code has been reported as inaccurate. Please submit any corrections or verifications.