Unlock All Missions
     At  the  Main Menu, press Select, Select, Circle, Circle, L1, L1,
Circle, L1, L1.

View All FMV Sequences
     At the Main Menu, press Select, Select, Circle, Circle, L1(7x).

Invincibility
     Pause   gameplay   and  press  Select,  Select,  Circle,  Circle,
Triangle, Select.

All Weapons and 50 MedKits
     Pause  gameplay and press Select, Select, Circle, Circle, L1, L1,
R1, R1.

Max Health
     Pause gameplay and press Select, Select, Circle, Circle, Up, Up, 
Down.

Min Health
     Pause  gameplay  and  press Select, Select, Circle, Circle, Down,
Down, Up.

Ethereal Mode
     Pause   gameplay   and  press  Select,  Select,  Circle,  Circle,
Triangle, Triangle, Triangle, Triangle.

Cheat Camera
     Pause  gameplay and press Select, Select, Circle, Circle, R2, R2.
Then  press  R1  to move forward, L1 to move backward, L2 for left, R2
for right, Triangle for up, and X for down.

Quicker Bond
     Pause  gameplay and press Select, Select, Circle, Circle, Square,
Square, Circle, Circle.

Freeze All Objects
     Pause  gameplay and press Select, Select, Circle, Circle, Select,
Select, Triangle.

Successfully Complete Current Mission
     Pause  gameplay and press Select, Select, Circle, Circle, Select,
Circle.

Remove All Objects
     Pause  gameplay and press Select, Select, Circle, Circle, Select,
Select, Square, Square.

Remove All Surfaces
     Pause  gameplay and press Select, Select, Circle, Circle, Select,
Select, Circle, Circle.

Remove On-Screen Displays
     Pause  gameplay  and  press Select, Select, Circle, Circle, Left,
Right, Select.

Color Beams
     Pause   gameplay   and  press  Select,  Select,  Circle,  Circle,
Triangle, Triangle, Square, Square.

View Debug Info
     Pause gameplay and press Select, Select, Circle, Circle, L2, R2.

Exit Door Anytime
     Pause  gameplay and press Select, Select, Circle, Circle, Square,
Triangle, Square.

???
     Pause gameplay and press Select, Select, Circle, Circle, R1, R1, 
R1.

Remove Fire
     Pause  gameplay and press Select, Select, Circle, Circle, Select,
Select, R1, R1.