X Button - Crawl Button, crouch, cancel
O Button - Punch Button, when flattened to wall: knock on wall, confirm menu selection
Square Button - Weapon Button, use weapon, throw, strangle, drag unconscious enemy
Triangle Button - Action Button, turn handle, climb up object, hang down outside handrail
L1 - Lock-on, Lock on to enemy (with weapon held)
L2 - Item Select, Selection of item, peek
R1 - First Person View
R2 - Weapon Select, Selection of weapon, peek
Start - Pause
Select - Enter/exit Codec screen
Left Analogue Stick/D-pad - In normal view: move player. In First Person View: move viewpoint
Right Analogue Stick - Change camera direction during Corner View