All weapons and infinite ammo
     Press Start, highlight Weapons and press Right + L2 + R2 + Square 
+ Circle + X.

Hard Mode
     At  the  New  Game  title  screen press Left + L1 + R2 + Select +
Square + Circle + X.

Movie Theater Mode
     After  jumping  out of the saloon window, there is an alley ahead
and to the left. Go down it, and you'll be in a cul-de-sac blocked off
by  burning  cars  (on  the  far side of the cars, some terrorists are
shooting  it  out  with  some CBDC agents on the roof). You will see a
movie  theater  across  the  street from the alley. Go up to the door,
pause  the  game,  and  go to the Map. Press L2 + R1 + X + RIGHT. Gabe
will  say, ''Got it!'' Exit the menu and resume the game, and you will
find  Gabe inside the theater. Go around past the concession stand and
enter  the  red-curtained  door to the auditorium. The FMV movies will
begin  to  play  in  succession.  Warning:  Some of the movies include
spoilers.

One-Shot Kill
     Pause  the game, highlight Silenced 9mm and press Left + Select +
Square + X + L1 + R2.

Stage Select
     Press  Start,  choose  Options, then highlight Select Mission and
press Left + L1 + R1 + Select + Square + X.

Super ammunition
     Start  the  game  and hit pause. Then, highlight the map menu and
press: right, R1, R2, X.

Weak Enemies
     Pause the game, highlight Map and press Right + L1 + R1 + X.