During the FMV sequence that plays before the main menu appears, press Triangle(3), Left, Square, Triangle(3), Left, Circle. If you entered the code correctly, you will hear the sound of a woman groaning. Repeat the code to disable its effect. You will now be able to go to the extra features menu and view the credits and play in free roam mode.
Double healthDuring the FMV sequence that plays before the main menu appears, press Up(2), Left(2), Right(2), Circle(2), Down. If you entered the code correctly, you will hear the sound of a woman groaning.
Infinite ammunition with no reloadingDuring the FMV sequence that plays before the main menu appears, press Up, Down, Left, Right, Triangle, Up, Down, Left, Right, Square. If you entered the code correctly, you will hear the sound of a woman groaning. Repeat the code to disable its effect.
Armored car weaponDuring the FMV sequence that plays before the main menu appears, press Up, Down, Left, Right, Square, Triangle, Circle. If you entered the code correctly, you will hear the sound of a woman groaning.
Note: The weapon can only be used during missions.
Free Roam modeSuccessfully complete all standard missions to unlock the "Free Roam" option. This mode allows you to go around London without having to do any missions.
CreditsSuccessfully complete the first twelve missions to unlock the "Credits" option at the extra features screen.
Turn signalsIn free roam mode, for added realism you can use your indicators (turn signals). Press L1 to indicate right and L2 to indicate left.
Skip intermission sequencesPress R3 + L3 during FMV sequences to skip them.
Note: You can only skip FMV sequences that have already been viewed.
Land Of Hope And Glory mission with DC CarterWhen you are escaping the Sol Vita and come down the stairs at the start, on the left hand side there is an explosion which brings down a staircase blocking your way through. However, first kill the men in front of you, then the man on the walkway above the wreckage. Then, instead of having to go through the package room, where you fight Harry for Hammond, go up to the wreckage. There will be a part where the floorway meets the hand rails. If you roll in the correct location, Carter will roll straight through the wreckage, avoiding the package room area and saving time and health.
Health recoveryIf you have been getting damaged badly by enemies and are close to dying, walk up next to a wall. Your character will lean up against it in order to recover. With each breath your character takes, part of his bullet holes disappear until he is fully recovered. This may take a minute -- make sure that no enemies are attacking you.
Small boostOn certain cars you can get a small boost of acceleration. When you are stopped, hold the handbrake (R1) and hold X. Keep holding it until the car starts to move forward, even though you are still pressing the brake. Once it starts to move forward, release R1. The car should rocket forward. On some cars, the wheels will just keep spinning and your car will slowly accelerate. This works well with the station wagon and the Saab.
Gas tank killsShoot a gas tank when an enemy is nearby to easily kill them.
Hidden vehiclesYou can find some hidden vehicles in the parks of London, such as a sooty van (Little Suzuki van with grass in the back) and a very fun golf cart parked behind huts and bushes around the parks.