These attacks are useful to know as there may be times when you have run out of ammo and only have your knife and bare hands.
Choke Hold to Fireman's Carry: Grab an enemy and hold the Left trigger to choke hold and do a fireman's carry with the body.
Stun Punch to Fireman's Carry: Stand behind an enemy and hold the Left trigger to deliver a non-lethal punch and fireman carry the body (if the person is to be kept awake or alive for an objective this will cause mission failure).
Knife to The Back to Fireman's Carry: To do a knife attack when you are behind an enemy hold the Right trigger. To do this move which ends with you fireman carrying the body you must be standing.
Unlock Elite Mode: When you have completed the game Elite mode will become availabe. In this mode you start the the game with only the knife and your guns are unloaded so you'd better start learning the button combinations for chokes and stun punches if you're going to have any chance of surviving this mode.
Unlock Movie Trailer: Complete the Lighthouse mission in solo mode to unlock a movie trailer.
Simple profile editing is involved for this cheat. First, start a new game and create a new profile and save it. Exit the game and go to the profiles folder in this path. My Computer ; C: ; Documents and Settings ; All Users ; Application Data ; Ubisoft ; Tom Clancy's Splinter Cell Chaos Theory ; Profiles ; then whatever profile you choose. Remember, Application Data is a hidden file, so you will have to set folders up to view hidden files. Now open the profile configuration settings for the profile you created with just about any word program. Move down to the F key assignments and find three of them that are unassigned. Write them down on a piece of paper or remember what you attach to each key. F2, F3, and F4 should be open. Here the example of what you will see when you're done. F2=invisible F3=invincible F4=ammo Save your changes and close the window and play the game with that profile. Hitting the hotkey on invisible and invincible will toggle it on and off each time you hit it. You will have to engage the cheats for each mission after it starts.