Alias Cheats

Level select:
After finishing the game. Then, hold L1 + L2 + R1 + R2 at the main menu to select any level.

Clothing:
Choice of clothing can prove imperative at certain points in the game. For Instance if Sydney Bristow is wearing skimpy clothing in a cold environment (i.e. freezer) then her movement will become sluggish. Therefore it is important to utilize the gadget selection menu to change her clothing based on the environments Sydney encounters.
User Cheat by TennesseeStar

Fighting:
Weapons can be anything from pool cues, to glass bottles, to knives, to guns, to metal poles. You can find them anywhere and if one is within arm's reach you will see the message "Pick Up Weapon".  Holding the action button (normal attack or special attack) will perform different moves with different weapons.
User Cheat by TennesseeStar

Asylum: Elevator code:
In the Asylum mission, there is an elevator. The code for the elevator is "4747". The code is given to you by speaking with Neil Caplain, who can be found in one of the padded cells.

Asylum: Getting DNA:
When you are trying to get the man's DNA and must follow him, when you get in the room with all the picnic tables go to the right side of the door and stand there. He will walk by time after time until you get all of his DNA. You will then fight him, escape from the Asylum, then move on to the Embassy level.

Embassy: Fire alarms:
When at the end and you have to turn on all the fire alarms, one is in Basement 2. REMEMBER: After you turn on all the alarms you must hurry to the ballroom and fight three men, then find Dixon and escape.