Easy revolver and more:-  When u are in the beginning of the game kill any 1 of the  solders and click x  then o  27 to 30 times right were the solider died and u will  activate a cheat that will  let u beat the revolver with 2 shots .it will also let get unlimited Nita ammo. Make sure that u do not have any saved metal gear solid data  on your  memory card(s) that are in the playstation (there must be at least 1 memory card in your playstation.

Briefing Camera Fun 

• During more than a few of the briefing "tapes", you'll see the words "camera change" and "camera free". This lets you know that you can mess with the camera for a little something to do while you're watching them. To zoom in or out, use the square and triangle buttons. To switch cameras, use the circle button. Of course, if you have been playing the game all night and are drowsy, you'll probably figure out that the X button stops and ejects the "tape" by accident. 

Change Title Screen Colors 

• When at the the Title Screen, simply press Up, Down, Left or Right on the d-pad to cycle through the different colors in the background graphics. 

Defeating Metal Gear 

• To knock out the radome on Rex, use your stingers, but first throw out a chaff grenade or two be fore he "wakes up". Use the stingers while rex is trying to find you (but he can't since you used the chaff grenades.) Don't wait for the target to come back after you shoot once, just wait for the smoke to clear. Don't forget to keep throwing out chaffs. After you talk to Gray Fox, use the stingers, and don't stop. If you put the stinger launcher away, the missiles will knock you down, just keep firing the stingers into the cockpit. Use you rations sparingly. Chaffs won't do any good this time, since Liquid is controlling rex manually. Remember, if you take it out of the launcher screen, you'll get knocked over by the missiles, and most likely die. Just remember you don't need the electronic site to fire. 

Defeating Psycho Mantis 

• Before fighting Psycho Mantis plug your controller into the controller #2 slot and press any button, the screen should turn black and have the word "HIDEO" in green in the corner. After a few seconds it will go away and you can use the 2nd player controller to fighting against Mantis. This way he won't be able to tell where your going to go because he can only read your left brain (left controller), he can't read your right brain (right cont.). 

Defeating Sniper Wolf 

• To defeat Sniper Wolf, you need to go all the way back to the Armory and go into the room with six mini-rooms inside of it. Go into the top-left room using your recently acquired level 5 key card. Inside is a PSG-1 and some ammo for it. 
  Now go back to Sniper Wolf. You should have picked up some Daizepam by now. This will allow you to aim your PSG-1 without it shaking. Go back to Sniper Wolf and shoot her with your PSG-1. She may be hard to spot and times because she likes to hide behind things. Look for her breathe, and wait for her to come out. Equipping your thermal goggles will also help.

Defeating Sniper Wolf (2nd time) 

• Equip your nikita and run up. You will have a little fmv and then run to the lower left. Use your nikita to attack Wolf. It is easier to attack her with the missiles than to snipe her with the PS-G1. Make sure she doesn't see your missile because she might shoot it. It is easier to see her in first-person mode. 

Defeating The Ninja 

• Once you've reached the Ninja hit the Ninja with your bare hands a couple of times and he will fight you the same way. After the Ninja starts to glow, (which is at the end of the fight) time the glowing and hit the Ninja with your hands. If you are hit with the glowing you will probably die. 

Defeating the Gunner 

• After Meryl opens the cargo door for you in the first floor of the Tank Hangar, you should go up top and make sure you get the Mine Detector. Now go back down and through the door.
  
  Turn on your Thermal Goggles so you can see the infrared sensors moving across the room. Make your way across the room carefully so you don't touch any of them. If you do, the doors will shut and the room will fill up with poisonous gas.
  
  After making it through that room, you'll have to fight the Gunner. First, turn on the Mine Detector and crawl over all of the Claymore mines so you can pick them up. Then throw out a Chaff Grenade to disable the Gunner's main weapon.
  
  With the main weapon temporarily unfunctionable, all the gunner can hit you with is the regular gun. Try to manouvre yourself so that you can get behind the tank, and then throw as many grenades as you can on it.
  
  Be sure to throw a Chaff Grenade out every time the one you previously threw out wears off. Also, there are Rations and more Grenades scattered out over the battle field. These will certainly help you make it through this fight. 

Destroying the Generator 

• To blow up the generator, you need a Nikita. Simply fire it and then get in first-person mode to make it easier to aim the missile. First turn right, and go through the door straight ahead, then left and you'll be in the room with the generator. Now just run into it. The cameras may shoot it down, so you'll probably have to try this more than once. 

Exercising Meryl 

• While crawling along the duct in the Holding Cells, you may look down to see Meryl in her cell exercising. Should you leave the duct immediately (down the ladder), and re-enter it again. Meryl adopts a series of power workout moves each consecutive time you view her. They are: A) sit- ups, B) single-arm push-ups, C) stretching, D) sit-ups in underwear, E) single-arm push-ups in underwear, F) stretching in underwear, G) sit-ups (same as A, and continuing with these from now on.) 

Exploding Soldiers 

• After getting the stealth suit start a new game. When you find the C4 try to sneak up behind a Genome soldier and plant it but be careful. You need to be close. With any luck you will plant a C4 pak on the Soldier's back. Get back and detonate it. Sayonara Soldier!!! 

Extra Modes 

• The regular game is excellent, but the built-in VR Training mode is a definite must.

At first there is only one choice, Practice. Finish all 10 stages, then you gain Time Attack, where the difficulty is heightened a little, but shouldn't be a problem besides the time limit.

Complete these 10 and you gain Gun Shooting mode, in which the difficulty is at max, and you HAVE to kill ALL the guards to progress within the time limit. You are given a Socom regular gun with supressor silencer and 5 bullets per guard. If you run out of bullets, you'll have to choke your way out.

If you can finish these 10 stages, one last stage can be chosen, Survival Mission, where you rush through all 10 stages one after another, in under 7 minutes. You start with 30 bullets and dead guards drop bullets. Good luck, if you can complete this, you are a true Metal Gear Solid Master. 

Fa-Mas Tracer Trick 

• First you need to get the bandana. To do this, DO NOT submit to Revolver Ocelots torture. When you complete the game and start over, you will have the bandana.
  
  Now start your second game and play up to the part where you get the level 2 keycard. Go to the Armory Basement Level 2 and get the Fa-Mas and Fa-Mas ammo.
  
  Now on your bullet counter in the lower right hand corner of your screen, you'll see that the last three shots are colored red. Fire the Fa-Mas until you use up all of the yellow shots and reach the red ones.
  
  These are your tracers, and they trail when you fire them damaging things that they hit as badly as your normal Fa-Mas ammo would. Now put on your bandana. Because the bandana tricks the computer into thinking that you didn't fire your last shot, you will now fire all tracers. This acts as a "guidance system" of sorts and allows you to aim the fa-mas just as acurately as the socom. 

Fast Travel 

• To move about through the complex faster, hide inside a cargo truck and use a C.Box. Remain perfectly still and a guard will drive the box to the area noted on the box. (There are three boxes, each to a different location.) 

First Person Nikita Missile 

• You can go into first person mode with the nikita missiles by launching the missile, then pressing triangle. However you can only do this for a certain amount of time or else it will blow up. this comes in handy when fighting Sniper Wolf, and also blowing up the electric panel source. 

Frequency for Meryl 

• The frequency for Meryl is 140.15. This is helpful if you are renting the game and don't have the cd case. 

Fun with Hal Emorick 

• When fighting the ninja lean against the locker that Hal is in and knock on it. He will make a funny whining sound. 

Get the Bandana 

• To get the Bandana, which gives you infinite ammo and no auto re-loads, play up until you get to Ocelots Torture Rack. If you make it out of The Rack without dying or giving up, when you beat the game, you will get the Good ending, where you save Meryl. She will give you the Bandana, and then once the credits a through, you can save your game. Save it and then load it up again. Look into your inventory and you will see the Bandana. 

Get the Camera 

• To get the camera, when you get a Level 6 keycard go to the first building (Tank Hanger), Then take the Elevator down to Basement 2. Go into the hall before the Room where you fought Ocelot. Then there should be a spot where you can blow a hole in the wall with C4, when you blow it up there are two rooms, The camera is in one of the rooms, and there is ammo and a ration around in there also. 

Getting Sick 

• If you fail in Revolver's torture room and come into close contact with Sasaki (the guard patrolling outside your prison cell), you can catch the flu. This flu makes you sneeze every minute or so. You can cure this flu with medicine. This medicine is a green box with a red cross on top of it. Another way to catch a cold is as follows: 
  
  When you're being held in the cell between Ocelot's torture tests, the guard talks loudly to himself about his cold, then runs to the bathroom. This is the point that most people usually break out of the cell. If you stick around and don't use the ketchup though, you will be treated to Ocelot's hospitality yet again. Survive, and you will be in the cell, and the sick guard will get the runs again. NOW you can break out of the cell. Give Snake a little time in the snow, and he will catch a cold, and start sneezing every minute or so. the sound will probably give you away to your enemies, so ask Otacon if there is anything he can do for you. 

Ghost Images 

• First, you need to obtain the camera either by [A] Finishing the game with the ending where Meryl dies and starting that newly created save file with the camera automatically in your inventory or ...
  
  [B] Getting at least as far as defeating Liquid Snake in the hind helicopter sequence, then going to the room located in Base 1, floor B-2 with a Level 7 cardkey where there are two autoguns you will have to use C4 explosives to the wall below and to the right of the bottom entrance to the room where you fight Revolver Ocelot -- in one of the two rooms here, the camera is located in the top one. BTW if you run into a jammed door that you should be able to, try using a C4 explosive on it and trying to it then.
  
  In either case, here is how you see "Ghosts". Make sure you have at least 2 blocks free on a memory card to save at least one picture Take pictures of different things and you may find a "Ghost" image of different programmers, artists, etc. superimposed on your new snapshot I've found two by taking pictures of the ravens on the last major elevator and one by snapping a shot of the dead guy in the prison cell.

Here are the locations for all 43 Spirit photos:

Kojima: Otacon lab (the picture frame to the right) 
Matsuhana: Hallway of corpses (outside Otacons lab) 
Sato: Comm Twr A (roof destroyed by a Hind D missiles) 
Nakamura: In Meryl's blood pool (where she is sniped) 
Shinkawa: Deep in Sniper Wolfs hallway behind the second pillar 
Uehara: Edge of elevator (the one were the ravens are) 
Negishi: Sewage waterfall 
Mizutani: When fighting Metal Gear 
Korekado: Men's retroom 
Sasaki: Picture frames in the Commanders room 
Sonoyama: Torture machine 
Toyota: Container in the middle of Raven's warehouse 
Kozyou: Behind the watertank-like structure in the Canyon 
Shimizu: Wolf dog cave (first crawling point) 
Kaneda: The mirror located in the Women's restroom 
Fukushima: Heliport,looking out to sea from cliff 
Takade: Ninja room,glass atedga 
Fujimura: Elevator,in the Comm Twr B complex 
Shikama: Electic floor 
Kimura: MG underground base,tip of of Metal Gear 'srailgun 
Kobayashi: Rock in canyon 
Okajima: Maggots of the real DARPA Chef in cell 
Nishimura: Next to Baker's corpse 
Mukaide: Reflection in wolfdog cave puddle 
Onoda: Where Baker is tied up 
Kitao: Decoy Octopus (fake DARPA chief) corpse 
Yoshimura: Dead end ofair duct 
Hirano: Elevator (Comm Twr B) deep in the shaft of top level 
Muraoka: Water in cargo dock 
Ishiyama: Heliport top of building 
Ito: Inside elevator to tank hangar 
Jerem Blaustein: Sniper Wolfs corpse 
Yoshioka: Bridge on the third floor of the the blast furnace 
Mori: Lowest point of elevator (Comm Twr B) 
Kinbara: Darck area of stairs 
Tougo: End of boiler room (in Blast Furnace where the stemeam is) 
Makimura: Hidden armory store room behnd the weakened wall) 
Kutome: Observation room 
Tanaka: Heliport,sleeping soilder 
Shigeno: Heliport,security caera by staircase 
Yamashita: Tip of nuke warhead in nukestorage room 
Kobayashi: Johnny Sasaki holding cell, near DARPA chief 
Scott Dolph: Way down in the dark from the walkway between Comm Tower A and B 

Jail Break 

• When you are in your jail sell after being tortured, you can get out with out the help of Otacon. The guard is very sick and has the runs. When he leaves to go to the bathroom crawl under the bed and wait for him to come back. When he sees your gone he will run to the jail cell and open it. When he first gets to the door quickly get out from under the bed and when he comes in you knock him down once, and he will be out for good. Also if you call Otacon he will give you some stuff and one thing he gives you is ketchup. When the guard leaves lay on the ground with the ketchup equipped in your items. It will look like your bleeding when he comes back he will think you are dead when he opens the door knock him down and your out. 

Knockout Punch 

• Hit Triangle+Square 5 times to charge up then do rapid punch and in 10 punches it will kill any boss. 

Mad Mei Ling 

• This is a code to make Mei Ling angry with you. Keep calling her over and over without saving. If you do it enough (8-10 times) she will stop talking to you and the stick her tongue out at you. 

Mantis Memory 

• The Mantis reacts with startlingly correct witticisms depending on the save games of other Konami games you have on your memory card. Try confronting him with a Castlevania, ISS Soccer, Suikoden or Silent Hill save game on your memory card for startling revelations. 

Meryl's Undergarments 

• In the Women's Restroom where you meet up with Meryl prior to the Psycho Mantis confrontation, if you follow Meryl straight in and move up to the top stall within five seconds. Meryl will not have time to properly change, and spends the first part of the conversation without her combat pants on. 

Nice Wolves 

• Method 1: When you first enter the caves, kill all the wolves. Meet up with Meryl, and kill those dogs there. Leave only the small one. Shoot Meryl with the Socom, then immediately equip a Cardboard Box. The little dog will pee on the box. Now whenever you are in the cave, equip the Box that the dog peed on and the Wolfs will leave you alone.
  
  Method 2: Simply equip Sniper Wolf's handkerchief. 

Policenauts Guest Appearance 

• After you defeat Ninja for the first time, and meet up with Otacon, he tells a story about Japanese Metal Gear prototypes. In the movie, scenes from Konami's Japanese game, Policenauts can be seen. 

See Through Mantis's Eyes 

• When battling Psycho Mantis, hold in the Triangle (1st Person View) button. Instead of seeing through Snake's eyes, you will see through Mantis's. 

Sharp Dressed Man 

• When you start your game for the third time on the same save, your memory card icon will be the ninja, and Snake will be wearing a tuxedo. Also the "Cyber Ninja" will be in a red costume sort of like spider-man 

Shy Meryl 

• When walking around with Meryl, if you keep staring at her in first-person mode. Meryl starts blushing, turning embarrassed and tapping her gun to her leg. Keep looking at her, and she turns more and more red, whispering embarrassed little questions. 

Silent, Deadly, and Easy Neck Snap 

• Sneak up, unarmed, behind a guard. When close, tap the square button really quickly ten times. This way you don't have to risk any ruckus. 

Stats when fighting Liquid 

• When fighting hand to hand with Liquid at the end, hit the circle button on the second controller and it shows the stats of the fight. 

Stealth Suit 

• To get the Stealth, which makes you invisible to all enemies except for Wolfs and bosses, play up until you get to Ocelots Torture Rack. Submit to Ocelot by pressing SELECT. After the game is beaten, you will get the bad ending where Meryl dies and you escape with Otacon. He will give you his Stealth suit. Watch the credits, then save your game. After you save, go to the Main Menu and load your game. Look in your inventory, you will find the Stealth Suit. 

Thermal goggle tips 

• When you play in a harder mode without the radar, the mine dector doesn't work. But if you use the thermal goggles you can see the mines. Also when fighting Mantis he likes to disappear. Just pop out the thermal goggles when he disappears and you can see him. 

Torture Tips 

• This tip contains a minor spoiler. You've been warned.

As you probably know, there are no continues in the torture event. If you lose, you start at your last save. So this won't be a huge loss, remember to save after beating Sniper Wolf. The torture event is coming very soon afterwards.

If you want the best ending, don't submit to the torture. It gets more difficult on the higher difficulty levels, but it never gets impossibly hard.

After getting through two tortures, you will have a chance to escape. When the guard runs to the bathroom, hide under the bed. When he says, "He's gone!" and runs to the door, hop out and snap his neck.

After you get your stuff back, get rid of the "Timer B." It's a time bomb.

Defeat The Ninja:
Submit by Kewlkat91

An easy way to defeat the ninja when he becomes invisible. simply equip the thermal goggles and you will never lose sight of the ninja.