Go to the Options Screen and select Credits. Now enter the following:

Infinite Ammunition:

L1, Triangle, Up, Down, Circle, Circle, Triangle, Square, Left, Triangle.

Infinite Health:

L1, Triangle, Up, Down, Circle, Circle, Triangle, Square, Right, Square.

Instant Puzzle Solve Mode:

L1, Triangle, Up, Down, Circle, Circle, Down, Down, Down, Up.

Expert Mode:

L1, Down, Down, Down, Triangle, Down, Down, Down, Square, Left, Right for a harder challenge.

Instant death with All Firearms:

L1, Triangle, Up, Down, Circle Circle, Triangle, Square, Down, R1 for one-shot kills.

Hints:

Deactivate Bomb on Jin:

When you have to disable the bomb on Jin, the wires go in this order. Left section red, center section yellow, blue section right. Then you will have 18 seconds do another pattern and it goes like this, red section center, blue section left, then finally yellow section right.