During the FMV before the Press Start screen appears press TRIANGLE, TRIANGLE, TRIANGLE, LEFT, SQUARE, TRIANGLE, TRIANGLE, TRIANGLE, LEFT, CIRCLE. A womanly sound confirms the code.
If you have a damaged car and an FMV plays, the car will regain its factory sheen. Nifty!
During the movie before the main menu appears, press UP, UP, LEFT, LEFT, RIGHT, RIGHT, CIRCLE, CIRCLE, DOWN. A woman will groan if you entered the code right.
If you stand next to a wall and don't touch the controller for a while, you will rest against the wall.
On the first level, get to the warehouse then die. You restart by your car. You can get in the car and drive away from the warehouse and explore. You cannot do this on later levels as cops will appear.
During the FMV that precedes the main menu, press UP, DOWN, LEFT, RIGHT, TRIANGLE, UP, DOWN, LEFT, RIGHT, SQUARE. Repeating the code disables it.
Yes, that's right. See a pigeon, shoot a pigeon. Use a long-range weapon for maximum effectiveness.
Not all movies can be skipped, but you can get past some of them by pressing R3.
During the movie that plays before the main menu, press UP, DOWN, LEFT, RIGHT, SQUARE, TRIANGLE, CIRCLE. This will give you the armored car weapon during missions.
To unlock Free Roam Mode, beat all of the missions in the game.