Tom Clancy's Splinter Cell Chaos Theory

After going through the gate when chasing Shetland, the first bomb is directly to the left of the gate that you enter. Go left through a little crevice and you should see a red light flashing. Go to it and disarm it. When you do that, one of Shetland's gaurds will walk up the stairs. Kill him. To get to the second bomb, go up the stairs. Turn left then turn right and look straight ahead. You should see another red flashing light down below the walkway. Hop over the ledge of the railing and disarm the second bomb. When you are done disarming the bomb, jump on to the railing and pull yourself up. Two guards will be to your left, walking on the walkway. They will probably hear you; get ready to kill them. It is fairly difficult to kill them without losing a lot of life, or at least dying. After you kill them, go down the walkway to the back wall. About halfway you will see another red flashing light. Jump across the little gap and disarm it. A guard will come through the back door right when you disarm the bomb. Kill him, then go through the door and meet Shetland. You will then have to make a critical choice; pull the trigger. Note: It would be a good idea to quicksave the game whenever you disarm and kill the guards.

To get rid of the enemy on the top of the lighthouse, hang along the edge of the lighthouse. Get underneath him and select the command "Grab NPC". Sam Fisher will grab and throw him off the edge. From here you can watch him scream and fall to his death.

To avoid detection by the invisible laser trip wire in the entrance of the vault, closely examine the entrance with your thermal goggles on. Then, use your OCP to disable the laser emitter and walk out of the vault. By doing this, you can leave without sounding the alarm.

Mission 1: Lighthouse
No keypad locked doors

Mission 2: Cargo Ship
No keypad locked doors

Mission 3: Bank
Keypad to left security booth on first floor: 3624
Keypad to right security booth on first floor: 3624
Keypad to main security room: 2306
Keypad to treasurer's office: 8645
Keypad to bank's back door: 3901
Keypad before president's office: 3490
Keypad to safe in president's office: Code unknown, must be hacked

Mission 4: Penthouse
Keypad To Dvorak Room: 0280

Mission 5: Displace
Keypad to door between meeting room and lobby on second floor: 8136
Keypad to door between meeting room and lobby on first floor: 8136
Keypad to CEO's meeting room: 2346
Keypad to CEO's office: 2609
Keypad to fire escape: 3485
Keypad to central server room: 2109
Keypad to R&D server room: 9205

Mission 6: Hokkaido
No Keypad Locked Doors

Mission 7: Battery
Keypad to shipping area: 1879
Keypad to elevator: Code unknown, must be hacked

Mission 8: Seoul
No keypad locked doors

Mission 9: Bathhouse
Keypad to owner's office: 3650

Mission 10: Kokubo Sosho
Keypad To Server Room: 1945

In order to do a better ledge grab, press X, then when the spy puts his legs up on the thing he is hanging from, press Forward while tapping A.

When you are at the place where you must scan the license plate, make sure that you first have blown out the candle and destroyed the guard inside. When you go outside you will see a man leaning on the car. Stand beside the car on the left and whistle. If done correctly, he will not come to the place that you have whistled to, but instead he will go inside the hut.

When you get to the lower floors in the I-SDF base, interrogate a guard. Sam will ask him about his LTL (less-than-lethal) weapon. The guard will tell Sam that the ammunition is some kind of electric round. Sam asks where he can find some. To this the guard replies: "It's not like you can shake me, and make my ammo drop on the floor". This is a reference to the Metal Gear Solid games, in which you can do just that.

Successfully complete the Lighthouse mission in solo mode to unlock a movie trailer.

When you begin the level, you will be in a kid's room. Immediately exit the room and go to the right. When you reach the end of the hall, in which the walls are blown away, turn to the right and enter a half-destroyed room. There should be a radio inside. Turn it on, and it will play the same music from the cafe from where you started near the Chinese Embassy 2 level on the original Splinter Cell.

In the final level, go through the second checkpoint. There will be two guards talking in a room; one behind a desk and the other in front. Once you go through the two sheets used as a door, to your left will be a bench. Jump on it. Then, stand up so that you are not crouching and move the camera behind you. You will then be able to see inside of Sam's head.