Finish the game on hard mode. Then go to the game select screen hold L1 and L2. Then enter CIRCLE, CIRCLE, SQUARE, SQUARE, LEFT, RIGHT, DOWN, DOWN.

During some missions you won't be able to kill anyone, and it may be hard to get close to people to knock them out. To knock them unconscious from afar, equip the SC-20K rifle and the Sticky Cam subweapon. If you hit an enemy in the head with the Sticky Cam they'll automatically drop unconscious. You can pick up used Sticky Cams and use them over and over again.

On the train level search the second car. Knock out the guard and go behind the fenced door. Look down to find a magazine featuring Prince of Persia.

If you leave bodies unhidden guards will eventually find them and sound an alarm, even if there are no guards patrolling the area where the bodies are. To hide the bodies, pick them up and move them to a shadow area. Your light meter will flash when it is safe to drop the body.

When you begin the first level (Dili, Timor) you will start off in the water. Now just sit there, or run around in the water, but don’t progress through the level. After 15 seconds after Lambert stops briefing you, he will ask you what you are doing. 15 more seconds after you reply, he makes another comment. And another 15 seconds left, he tells you to get moving because lives are at stake. Now you are free to continue your game.

If you are out of SC-20K ammo but need to snipe a guard or knock out a light long distance use this.

Take out your SC-20K and zoom in on your target. When your are right on the target hit L1 to hold your breath. Before releasing L1, hit R2 to put away your SC-20K. Don't move anywhere. Shuffle through your weapons and take out your pistol. You should be directly in line with your target, go ahead and shoot it.

Remember that it is extremly important that once you put away your SC-20K you don't move anywhere, Don't even change the camera direction.