Enter your name as !LAMAUDITE! and you will have all levels.
Chinese Embassy: Part 2
At the start, go to the restaurant doors and enter. Go into crouch mode and walk past the wall. Two men will be eating and saying something about a bomb detonating. Aim your assault rifle and the table post(make sure the diversion camera is equiped). Shoot it and aim up and over until you have both men in sight and use the gas. Do not worry about hiding the bodies as they are only K.O. The cook in the kitchen is eady. Turn out the lights and knock him out when he goes over to turn them on. Go into the corner of the room by the window and go up the ladder. Go up the other ladder and across the boards. Their will be a guard so make the first right down the hall and behind the toilet. When he comes in...FIRE! Hide him in the closet. Go out and go down the second hall onto the balcony. There will be a pole to your right. Go up it and onto the ledge. Shimmy all the way around until you can not go anymore. Drop down and go up the other pole. Go straight and fall through. SAVE IT! The rest is pretty explanatory.
Defense Ministry: Getting to the South Hall/Wing
After interrogating the driver and heading back upstairs, save at the checkpoint and view the intermission sequence of the window in the courtyard opening. Walk out on the balcony and turn left. Jump on the rain gutter on the wall. Move along the gutter towards the open window. If an alarm goes off, you have not properly hidden your dead bodies. Move back through the level and throw all your dead bodies into dark corners.
Defense Ministry: Nikoladze's Office
Once you rappel through the glass window and kill the guard, access the computer in the far right corner of the level first. Then, access the main (Nikoladze's) computer closest to the window. Immediately run back to the window and drop out, but stay near to the ledge so that you will grab hold of it and hang out with the window. Guards will enter and search the office. They will not see you if you remain hanging out the window. They will clear the room, then leave. You can now access the computer again (as instructed by HQ). Then, proceed with caution when reaching your extraction point.
Drop bodies quicker
If you are carrying a body and you need to drop it quickly then instead of pressing A, press X. Sam will drop the body instead of placing it on the floor. This also helps you equip your gun quicker if you are carrying a body and need your gun out quickly.
Escaping a room full of soldiers
Take a sticky camera or smoke grenades and throw it near where the most guards are located. For the sticky camera, a control bar that tells you how to make a noise or use smoke will appear at the bottom of the screen. Throw the smoke grenade and the smoke should knock out some guards. When the smoke appears from the grenade(s), it is your chance to run for it .
Extra Equipment Cia Level
Right after you have knocked out Mitchell turn around. Go to the last door in the hall. It will be marked UFO Sightings Office. Use your lock pick and unlock it. Go to the computer and get the data stick. It will be encrypted but, you can see the numbers 020781. Go to the keypad, type it in. Inside on the table to the right there is 2 sticky shockers and on the table to the left there is 5 reusable cameras. Take them and get the body. You may now proceed with the new equipment.
Gas Equipment Tips
Distraction Camera
Whenever you see some enemies gathered, throw a Distraction Camera so that they will not notice it. After you have control over controlling the camera, continuously press the distracting whistle noise. The guards will come over, but if not all the guards are there that are in fairly close distance with the camera, then keep making the distracting noise. Once some of the guards are over there, release the gas. Sometimes the guards may just cough a few times, but not get knocked on conscious.
Gas Grenade
This is an equivalent of the gas that is in the Distraction Camera. However, this has a taller and wider gas range. Also, instead of spraying in one direction, this is like a gas cloud. Whenever you see a group of enemies, you will want to ricochet these off of a wall and get it so that it's positioned near the enemies. It will burst open and gas will fly out. Again, the enemies may not be knocked on conscious. Usually, depending on how close you throw it to the enemies, the enemies will immediately be alerted.
Hiding
You cannot be seen when hiding in dark places. Shoot the lights to make it dark, but make sure that there are no guards around. Do not stay in the light too long.
Knock out an enemy
To knock out an enemy without killing him, equip the sticky camera and shoot it at his head. Aim slightly above the head to compensate for gravity. After he is down, pick up the sticky camera and use it again.
Luring your enemy
To do this, find a can or glass bottle to pick up. Once obtained, move to a location, preferably dark. While hidden, throw the can or bottle to an open area with an enemy nearby. When thrown, the enemy will wonder what happened and walk towards that location. After you have drawn him out, you can take him out for an easy kill.
Presidential Palace - The Library
At the part on the Presidential Palace level where you go down in the lift and you have several elites facing you, I have a tactic to skip the battle. As soon as you get out of the lift, run to the end left bookshelf near the stairs. Kill the guard behind it and then quickly run into the tunnel behind the bookshelf and it will skip the battle against the elites! This tactic saves you a alot of health and ammunation.
Thermal goggle keypad reading
The keypad is based on color it goes from Deep Blue, Blue, Light Green, Green, yellow, and orange-ISH for example if you looked on a keypad after someone and put in a code and see a dark blue at 5, light blue at 4, light green at 3, and orange-ISH 2 than the code is 5-4-3-2.
Training stage secret
At the beginning of the Training stage, after completing the looking at the lights task, go over to the left of where you are. You'll see a ledge above you that can be double-jumped onto. Jump onto the ledge and go to the door. Enter the code 5656 and you'll go into two rooms. In the second room there will be Anna Gromsdottir, who will talk to you about various things.
Various Hints and Tips
For players that are stuck these tips come in VERY handy!
1. Cameras can't spot you from long distances
2. Cameras can't pick up slow body movements (don't go running across the room)
3. If you hit a camera in the wrong place a small shower of sparks will show. DON'T BE FOOLED! Look for the big shower of sparks to disarm it. Only hitting it in the right area will disarm it.
4. You're not superman. A 20+ foot drop will kill you.
5. ALWAYS check under doors with the opticable. You don't want to walk in on a sleeping guard
6. Pace yourself. Always look for an answer to your problems. Lights, Cans, Bottles, and narrow hallways might help.
7. Do not save any items. Use them while you can because all items will be replenished at the end of a level. DO save bullets. You very rarely get any ammo in a level so if you can, use a KO method.
8. It's ok to kill a civilian. If one gets in your way, kill him. But don't kill two civilians or the mission is over.
9. Walk, don't run. Always crouch but never push too hard on the joystick; even running in crouch will alert the guards.
10. ALWAYS hide corpses. Many guards patrol many areas and it they find a dead man (woman) they will sound the alarms.
11. If a guard finds an unconscious man (woman) he will revive him/her.
12. Use your resources. A can or a bottle will come in handy. Search for them in trash cans.
13. Rolling will help you not get burnt by fire.
14. Double jumping will help you reach high ledges.
15. Don't expect to have an easy time ever! This game is a very challenging, so pace yourself and take your time. It is a strategy game.