Mission: Impossible - Operation Surma cheats and cheat codes for Gamecube

Selecting stages:
Select "Profiles" option. Highlight "Jasmine Curry" tab after 
hold L + R + Y + X buttons. You will be throwed 
back to the main menu, and you should see the unlocked 
"Levels" option. Note: You can't save the game, when 
you use this cheat.

Unlock movie sequences
Type "SEECOOLMOVIE" as code at "Load Game".

Kill Algo faster:
Aim for the muzzle, as soon when he start fires, move up slightly and fire.

Kill guards easily:
1.) Go behind a guard silently by pressing L1
2.) After press R2 to grab him. 
3.) Pressing X to kill him
4.) You can move him to a handscanner also, just press Triangle to scan his hand 
to open the door. 
5.) After you kill someone, go near him and press R2 button to hide him in the 
shadows.