Easy Mode- At the mission selection screen, continuously tap C-up, Z. During this time Ethan will rapidly say "Ah, that's better". It starts out without turbo but almost doubles the health. It then eventually gets you turbo.
Invincibility- Press R, Z, C-down, R, C-down at the level select screen
Infinite Ammo- Press C-up, Z, C-left, Z, L at level select screen
Meet The Infogrames Team- After you complete the game on “Possible”, wait until the credits are over. You will now be able to go back into the Embassy and meet the Mission: Impossible (second) design team. Talk to all the people until your health bar is full. You’ll then get a bonus animation of Ethan.
Giant Head Mode- At the Level Select screen press C-down, L, C-up, C-right, L. If done correctly you'll hear Ethan say "There, that's better."
Big Feet Mode- At the Level Select screen press C-down, R, Z, C-right, C-left.
Big Head Mode- Press C-down, R, C-up, L, C-left at the Level Select screen.
Kid Mode- At the level select screen press C-down, C-up, R, L, Z.
Turbo Mode- Press C-up, Z, C-up, Z, C-up at the Level Select screen. You will hear a horn honk and Ethan say "Ah, that's better!"
Mini Rocket Launcher- At the Level Select screen press R, L, C-left, C-right, C-down at the level select screen. This will give you the mini rocket launcher and 30 rockets.
7.65 Silenced Pistol- Press C-up, L, C-right, C-left, C-up at the Level Select screen. You’ll get the pistol with 30 rounds.
High Powered 9mm Pistol- At the level select screen press R, L, C-down, C-up, C-up. This pistol comes with 30 rounds.
Uzi- At the level select screen press C-right, Dead Piano Player- In the game go to the recover NOC: List mission. First you need the 7.65 silinced pistol, the UZI, the minnie rocket launcher, and the 9mm high power gun. Go to the Embassy Function, the first level. Go over by Dieter and get out the rocket launcher, or any one you like I would perfer the rocket louncher, kill Dieter. You might have to shoot him a couple of times but thats ok, when the gaurd comes down quickly turn around and kill him. Then kill everyone in sight but remember, DON'T KILL THE PIANO PLAYER YET!, then kill all of the gurds and everyone in the next erea. Then when everyones dead kill the piano player. Wait about 40 seconds then press START. Wait 40 more second while in START menu. Then press START. You will hear the piano player playing the piano!
Fly Mode- Hold R, A, B, and C-down at the level screen.