The Simpsons: Hit & Run

Codes

Go to the options menu, either in game, or on the main menu
Hold L1+R1 and press the following:

Alternate Audio during Credits	X, Square, Square, Triangle
Alternate Views	O, O, O, X
Blow up cars on impact	Triangle, Triangle, Square, Square
Car is invincible	Triangle, X, Triangle, X
Drunk Driving	triangle, circle, triangle, circle
Grid Mode	O,X,O,Triangle
High acceleration	Triangle, Triangle, Triangle, Triangle
No top speed	Square, Square, Square, Square
Press L3 to make car jump	Square, Square, Square, Triangle
Speedometer	Triangle, Triangle, Circle, Square
Unlock the red brick car	Circle, circle, triangle and square