Syphon Filter

Deafeating Gurdiux-
Ok, first you have to hide behind one of the pillar thingys.  (If you don't already have the shotgun, get it in the green box.)  
Ok, be careful not to catch on fire by Gurdiux's flamethrower.  use R1 to get him in your target and shoot him.
(with the shotgun.)  If you hit him right there will be a small explosion and Gurdiux will say "ahhh" or somthing like that. 
Hit him about 5-10 times and a movie will start.


Theatre mode.
Level one,enter the bar and shoot the geezer in the small crate room.Then smash and climb through the window then go left and theres a small silver box climb over the box.
Then there would be 2-3 cop cars flippes side ways on fire then go to the box and get the flak jacket.
Then there would be 2 doors in front of you then press start then highlight map and hold Right+L2+R1+X then you would hear "GOT IT" then you would on pause then you would be in the theater.Press X to skip and Start to quit.

All weapons and unlimted ammo:
Pause the game then highligweapons,then hold Right+L1+L2+R2+O+X then the weapons in the currently level will be available.

Silenced 9mm one shot kill:
pause the game go to weapons highlight 9mm then hold Left+L1+R2+Select+Square+X

Expert mode:
At the title screen highlight New game and hold Left+L1+R2+Select+Square+O+X and you would hear "damn it" if the code is entered correctly.