D-Pad - Move Snake. Directional Pad To Move While Leaning.
Press O To Tap On Wall.
Square - Choke Guard.
Square then Square Repeatedly - Break Guard's Neck.
Hold Square And D-Pad - Drag Guard Back. Can Be Used As Shield.
D-Pad and Square - Throw Guard.
X - Crouch Onto Knees.
X then D-Pad - Low Crawl.
O - Punch / Kick
O, O, O - Punch, Punch, Kick
Triangle - First Person Perspective.
Triangle and D-Pad - Look Around In First Person Perspective.
L2 - Bring Up Items Menu.
L1 - Bring Up Last Item Activated.
R2 - Bring Up Weapons Menu.
R1 - Bring Up Last Weapon Activated.
Select - Bring Up CODEC.
Start - Pause Game.

WITH WEAPONS:

With SOCOM Pistol:
Hold Square - Aim With Laser Sight.
Hold Square And Let Go - Shoot.
Hold Square, X and D-Pad - Move Snake While Aiming Gun.

With FA-MAS Machine Gun:
Square - Shoot.
Hold Square - Automatic Shoot.
Hold Square, X and D-Pad - Move Snake While Shooting Automatically.

With PSG-1 Sniper Rifle:
D-Pad - Aim Cross Hair.
Square - Shoot.

With Stinger Missile Launcher:
D-Pad - Aim.
Square - Launch Rocket.

With Nikita Missile Launcher:
Square - Launch.
D-Pad - Steer Missile.
Triangle - First Person Perspective.
Triangle And D-Pad - Steer Missile In First Person Perspective.

With Stun, Chaff And Regular Grenades:
Square - Release Pin And Throw.
Hold Square - Release Pin And Hold.

With C-4 Explosive:
Square - Attach To Ground.
Square (Near Guard) - Attach To Guard.
D-Pad Toward Wall And Square - Attach To Wall.
Crouch, D-Pad Toward Wall And Square - Attach To Lower Part Of Wall.