Radio Frequencies
140.01 - Salty Catfish / 66 Boys
140.52 - Rock Me Baby / 66 Boys
141.24 - Sea Breeze / Sergei Mantis
142.94 - Pillow Talk / Starry.K
144.06 - Jumpin' Johnny / Chunk Raspberry
147.08 - Surfing Guitar / 66 Boys
147.59 - Sailor / Starry.K
149.53 - Don't Be Afraid / Rika Muranaka
Unlockable List
Beat the game to get:
Tuxedo
Camera
Patriot with infinite ammo
Single Action Army
Camouflage
Beat Ocelot non-lethally: Animals - Steady aim
Beat The Pain non-lethally: Hornet Stripe - Wards off insects
Beat The Fear non-lethally: Spider - Trades stealth for stamina
Beat the Fury non-lethally: Fire - Less damage from fire
Get to the end of the Sorrow - Choke people for stamina.
Beat Volgin non-lethally: Cold War - Russians will not attack
Monkey Mask
Get the five best times in Snake Vs. Ape to unlock the monkey mask.
Nightmare Mini-Game
After Snake's torture, you can save the game. If you load this save in another game, a sword fighting mini-game will begin.
Snake Pukes
Spin snake in circles in the cure menu to make Snake throw up.
Title Screen Fun
On the title screen the L3 button changes the pattern in the background. R1 speeds up action and R2 slows it down. L1 switches the black silhouette from the foreground to the background and L2 changes the color of the silhouette. L3 changes the color of the pattern in the background.
Defeating Volgin
Defeating Volgin on top of the Shagohod is the same as fighting it the first time. Take out your RPG and aim for the treads. When you hit the treads, you will stun the Shagohod and leave a window open to do damage to Volgin. You cannot hurt him unless you shoot him in the sides of the back. Make sure you are close enough to get behind him and unload with any gun. Do this to make quick work of Volgin.
Frustrate Volgin
In the battle against Volgin in the Shagohod hanger, put on the mask. Volgin will begin to say things like " Ivan?". This will make Volgin slightly more aggressive, and ake it easier to attack his back. However, his attacks will become more fierce.
Special snake
When you are fighting The Boss at the field of daffodils, throw a grenade anywhere when you get the chance. If you hear the sound of an animal turning into a ration, put your thermal goggles on and look for the ration with a special snake inside. Press Start and look at your food. If you picked it up, you will have a snake named after one of the sons of Big Boss. You can eat it, and he loves it. If you do not find a ration or hear a sound, throw another grenade. Eventually you will get one. They are mostly near the rocks.
Purge poison
When Snake is stricken with food poisoning, use the "Sick Snake" trick to make him vomit. It will cure the food poisoning. Note: The "Sick Snake" can be done when standing and crouching.
Sleep talking
In the scene where you have to reach the Wig with Eva injured, shoot her with a tranquilizer dart. She will pass out and begin to talk in her sleep. To wake her up again, go into the survival viewer and cure her with the knife. Alternately, you can kick her awake.
Opening the door in weapon lab and getting Skorpion
To open the door that requires a radio frequency, you must capture a guard. Hold the knife to him to get the information by pressing L3 (145.86). Call that while standing in front of door to open it. You should hear a click. Once inside the door, the very powerful Skorpion (includes laser sighting) can be found in the far northeast of the room, along with ammunition. Note: The room can only be entered through the door located to the east. The one to the west does not open until after the east door is opened.
Hidden intermission sequence
In Groznyj Grad after the torture scene, you will wake up in the prison. Get the fork and remove the bullet, but do not remove the transmitter. Then, continue the game. Later when you meet Eva behind the water fall, there will be a funny extra intermission sequence that takes place after Snake pushes her away from the kiss. The extra scene will only play if you still have the transmitter in you at this point.
Moss Camouflage
When fighting The End, if you sneak up behind him when he is asleep and hold him up, he shakes down and will eventually give you the camouflage moss.
Ocelot Time Paradox
After the cut scene where you first meet Ocelot, knife him to death. Once you kill him the game over screen will pop-up and say "OCELOT IS DEAD." Cambell will then yell at Snake for creating a time paradox.
Skip The End
In the cut scene when you see The End in a wheelchair, quickly get your gun out (use the sniper rifle if you have it) and shoot his head before he gets back inside the building.
Raiden Poster
When you steal Raikov's outfit in Groznyg Grad you hide Raikov's body in a locker room on the 2nd floor. Once you take his body in the room, a cut scene will start showing snake putting Raikov's body in a locker. If you look closely, you can quickly see a poster of Raiden from MGS2 on the inside of the door of the locker. This is the locker that contains the sneaking suit later.
Movie
After you're through with the torture and you're in your cell, leave the transmitter in that's lodged in you rather than extract it with the knife. When you get to the cave with Eva, you'll see a funny cut scene.