XIII Cheats

In the ssh secret base at the third check point in the locker room
there is a secret vent where you are under a security camara  there is
a gi right in front of you so hurry

When you first start the FBI level, immediately after the woman shoots out your cuffs, go to the center of the room with the three computers. You will find the Ubisoft logo acting as a screensaver. Also, if you walk up to the computer screen, look down at it, and press X, the screen will say "GAME OVER".

To unlock all levels pause game-play and press the following combination:
R1
Circle
R1
L2
R1
L1
Square

At the start of the game, run though the back door to a gun faster and safer than going to the man at the front. Note: Hit him in the head and he will die faster.

Pause the game and press R1, CIRCLE, R1, L2, R1, L1, SQUARE