Mission Impossible

Zoom without the Sniper Rifle:
First you have to select a gun (i.e. Dartgun).
Then, while holding the Rbutton to aim, the the Up and Down C's to zoom in and out.

Cheat Menu:
At the level select screen enter: C-Right, C-Left, C-Down, R, L, C-Right.

Big Feet Mode:
To get "Big Feet Mode", and the level select screen input: C-Down, R, Z, C-Right, C-Left.

Big Head Mode:
Enter this code at the mission select screen C-Down, R, C-Up, L, C-Left.

Kid Mode:
At the level select screen input: C-Down, C-Up, R, L, Z. This enables "kid"mode. Al players will be small and kid-like.

Turbo Mode:
To get "Turbo Mode", at the level select screen input: C-Up, Z, C-Up, Z, C-Up
until you hear a horn honking and Ethan saying "Ah, that's better!".

Meet The Infogames Team:
Beat the game on "Possible" difficulty setting. Then 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)-- then you will get a bonus animation of Ethan, that little devil.

Extra Weapons:
Press these during mission select(level select):
1. C-UP, L, C-RIGHT, C-LEFT, C-UP: Gives you 7.65 Silencer with 30 rounds
2. R, L, C-DOWN, C-UP, C-UP: Gives you 9mm HI POWER with 30 rounds
3. C-RIGHT, C-LEFT, C-RIGHT, C-DOWN, R: Gives you Uzi with 30 rounds
4. R, L, C-LEFT, C-RIGHT, C-DOWN: Gives you Mini Rocket Launcher with 30 rockets
These codes will give you weapons you can't get during the mission.

Interrogation Room Tip:
At the end of the Interrogation Room level, you must get in front of the agent as he sprints down the hall opening doors. He will try to board the elevator, and you must be near him in order to access the next mission.

Talk Twice:
Talk to everyone at least twice (if you can).
In the Embassy, for instance, the couple who where looking at the portrait are now sitting on the musical score you need.

Sniper Tip:
When in the train station playing as the sniper, you have to zoom in on Ethan carefully in order to accurately shoot the undercover agents. Some characters, like the civilian that offers Ethan a cigarette, could be mistaken for a gunman so stay alert at all times.

Crack Safe Open:
In the last baggage car on the train, you'll find a safe that's sealed. Find the blowtorch and nitrogen tank, then freeze the safe's two iron bars. That should crack the safe open.

Right Camera Angles:
Using the right camera angles is the key to success in the Terminal Room. Switch the camera around to see the lasers more clearly. Also, be aware that an agent will come into the room and use the computers every 30 seconds or so.

Guiding Candice:
Guiding Candice though the sewer system is trick because she's weak. Make sure that you wait for her, especially when taking tricky platform jumps.

Use One Bullet:
In the Train Car, you must neutralize all of Max's henchman (there are a lot of them). The easiest way to do this is with a clean head shot--you only use one bullet, and there's precious few to spare.

CIA Rooftop Level:
On the CIA Rooftop level, turn the lights off (look for out-of-the-way crates to hop on). When you find the bag Candice left for you, click on it in the menu and you'll change into a maintenance worker. Now, go to the heliport and fix the lights (the switch is down the left-hand stairwell on the wall), neutralize the guard near the switch, and obtain his passcard.

Terminal Room Glitch:
Go to where the last yellow lazer is and wait for that computer operator to come in and leave. Then touch the yellow lazer quickly when the first door closes to make the operator place you under arrest through the wall and will shoot you down through the wall too.

Make Ethan Cough:
This is a very simple trick that I found on accident. On any level, just stand still and don't move. (out of harms way of course) After a while, Ethan will cough and look from side to side. This trick can be performed on the Possible or Impossible setting.

Ethan Sits down:
This trick is done the same way as when you make Ethan cough. All you have to do is to stand and don't move, just like when Ethan coughs, only you wait longer. Ethan will cough about 3 times, and after the third cough he will sit down and wont get up unless you start to move him. This trick can be preformed on the Possible or Impossible setting.

Blow Up Helicopter:
Complete every objective in the CIA Rooftop, up to the point where you install the EMS. Don't install it, just wait for the helicopter to take off. When it's in the air, install the EMS. The helicopter will come back down and explode.

Cheatcodes:
Enter all of these codes during the mission select (level select) screen:

R , Z , C-Down, R , C-Down - Gives you Invincibility
C-Up, Z, C-Left, Z, L - Gives you Infinite Ammo
C-Down, L, C-Up, C-Right, L - Gives you Giant Head Mode
C-UP, Z, C-UP, Z, C-UP - Gives you Turbo Mode
C-DOWN, C-UP, R, L, Z - Gives you Kid Mode
C-DOWN, R, C-UP, L, C-LEFT - Gives you Big Head Mode
C-DOWN, R, Z, C-RIGHT, C-LEFT - Gives you Big Feet Mode
C-RIGHT, C-LEFT, C-RIGHT, C-DOWN, R - Gives you Uzi with 30 rounds
R, L, C-LEFT, C-RIGHT, C-DOWN - Gives you Mini Rocket Launcher with 30 rockets
C-UP, L, C-RIGHT, C-LEFT, C-UP - Gives you 7.65 Silencer with 30 rounds
R, L, C-DOWN, C-UP, C-UP - Gives you 9mm HI POWER with 30 rounds