Getaway, The cheats and cheat codes for Playstation 2

Before the main menu appears you can see a movie. During the 
movie plays enter the following codes. Sound of a woman groaning 
will confirm the correct code entry.

Unlock free roam mode and all extra features
Press Triangle, Triangle, Triangle, Left, Square, Triangle, 
Triangle, Triangle, Left, Circle.
       
2x health
Press Up, Up, Left, Left, Right, Right, Circle, Circle, Down. 

Unlimited ammo with no reloading
Press Up, Down, Left, Right, Triangle, Up, Down, Left, Right, Square. 

Armored car weapon
Press Up, Down, Left, Right, Square, Triangle, Circle.

All weapons
Press L2, L1, R1, R2, X, R, X.

Unlock Free Roam option 
(You walk around London without having to do any missions)
Finish all regular missions

Unlock Credits
Finish the 12 missions

Kelvin Deamer mode:
Finish the game to unlock free roaming mode. Then, go to the golf cart 
that you will find in one of the parks. Press Up, Down, Triangle, Down, 
Triangle, Left, Right, Circle, to be transformed into a character 
known as Kelvin Deamer.

Gas tank kills
Shoot a gas tank when an enemy is nearby to easily kill them.

DC Carter moves

Knock out hostage:
With a gun, press X to get a hostage then press Square.

Kick hostage:
While unarmed, X to get a hostage then press Square. 

Mark Hammond moves

Shoot hostage:
With a gun, press X to get a hostage, then press Square.

Break hostage's neck:
While unarmed, press X to get a hostage, then press Square.

Mark Hammond's Mother
Press L2 L1 L2 L3 and you should hear a woman scream then your character 
will automatically change.