DRIV3R

Unlock all missions:
Go to the main menu, and press the following button combination on your
Xbox controller: X, X, Y, Y, R, R, L.
If the code is accepted, you should hear a sound

Unlock all vehicles:
Go to the main menu, and press the following button combination on your
Xbox controller: X, X, Y, Y, L, R, L.
If the code is accepted, you should hear a sound

Unlock all weapons:
Go to the main menu, and press the following button combination on your
Xbox controller: L, L, X, Y, Y, R, R.
If the code is accepted, you should hear a sound

Unlimited ammo cheat:
Go to the main menu, and press the following button combination on your
Xbox controller: R, R, L, L, X, Y, Y.
If the code is accepted, you should hear a sound

Unlock invincible mode option:
Go to the main menu, and press the following button combination on your
Xbox controller: X, Y, L, R, L, R, R.
If the code is accepted, you should hear a sound

Unlock Immunity option:
Go to the main menu, and press the following button combination on your
Xbox controller: X, Y, R, R, L, L, Y.
If the code is accepted, you should hear a sound

18 Wheeler Havoc option:
Go to Miami and kill all 10 hidden Timmy Vermicellis characters.
To activate the "18 Wheeler Havoc" option, enter to the Miami armory.

Pedestrians have weapons:
Kill all 10 hidden Timmy Vermicellis characters in Nice.
To activate the "Fugitive Mode" option, enter to the Miami armory.

Infinite Mass:
Kill all 10 hidden Timmy Vermicellis characters in Istanbul.
To activate the "Infinite Mass" option, enter to the Istanbul armory.

Burnout: Click the Right Analog-stick or hit B.
Horn: Click the Left Analog-stick - or hit R.