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 DONT 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.

After killing off all of Sadono's guards, lure him into a dark corner then shoot him with a Ring Airfoil. Then, run up behind him and grab him. You can now force him to use the retinal scanner and complete the mission. Also, rather than picking off each one of the bodyguards, you can go to the right all the way around the room in the shadows. You should then reach the stage behind Sadono. Follow the curtain's shadow to Sadono. There will be a gap. Stand up and run until you see the "Grab Character" option appear. Grab him. You will be shot at and probably get hit, but once you grab him they will stop and you will hear someone say "Don't shoot, you might hurt Sadono". After that you are home free as they will not follow you.

To aim better with the pistol, press X to pull it out. The crosshair should appear normal. Then, press Up on the D-pad and the crosshair should become a laser sight. This makes it very easy to aim, since the laser sight is smaller and thinner than the normal crosshair. This allows fast kills and head shots. Note: If you are in dark corners and have the laser sight on, the enemies will notice and attack you.

Click the Right analogue stick to zoom in the sniper scope, then press L to hold your breath. You should be able to get a good shot while Sam stays still.

To knock out a guard without using a Sticky Shocker or a Air Foil, shoot a Sticky Cam at their head. Note: It must hit him directly in the head for the guard to get knocked out.

When you complete the game on the normal or hard difficulty setting, when you go back into the game make sure you go over towards the level select instead of checkpoints. You could lose your data and have to do it over again if the wrong choice is made.

On the mission when you are on the train, look in the second car where the guard is located. Knock him out then go behind the fenced door. Look down you will see a magazine featuring Prince Of Persia. Also on the third level when you are in Paris on the train, at the beginning there will be a room with an engineer. Knock him out. On the floor of the room is a Prince Of Persia strategy guide.

The code for the security room on the Lax level is 1387.

Theres a trick you can perform as a mercernary in the Mount Hospital. Both teamates (p1 & p2) on the merc side have to meet in room 202 in order to do the trick. In order to get outside the Mount Hospital one of your teamates has to get on top of the neutralization pod, and the other teamate has to neal right against the window in front of your partner. once both teamates are in place the person in the pod has to jump off onto your teamates back and jump onto the window sill.this will temporarily knock your teamate out.once he is up jump out of the window and have fun supprising the spies when you kill them.

When you are playing in an online match and lose all of your respawn lives, mute your teammate and then unmute him. Both of you can now communicate with each other.

On the first half of the Jerusalem level, there is a book store directly behind an alley with a swinging lamp. Next to it is another smaller alley with a swinging lamp. If you look inside the large window you can see many different picture references to The Punisher, Ubi Soft's XIII, an anime, and a picture of the infamous "Sniper Kitty" among many other things. Use the binoculars to get a much better look.

To whistle, press Black. This will usually make a guard approach the sound. Note: Hide in a dark area and whistle, then jump the guard when he stops.