Ship's Bow
As soon as the mission starts, run to the right, until you reach the wall, then take out some sort of scoped weapon. If you look to the top right of your screen, you should see a FROG jump from the roof to the top of a flight of stairs, shoot it in the head. Then, depending on what difficulty, your playing on, one or more FROGS will drop down, shoot them in the head, then run forwards. As soon as you've rounded the big crate, you should see a narrow corridor with explosive barrels to the right and a ladder on your left, ignore both of these things and start crawling along the ground, make sure your octocamo changes, this should give you around 90% camouflage. Two more FROGS will be in the next area, shoot them in the head. More will drop down, shoot them in the head. Run forwards till you get to a big barrel on your right, wall press past the barrel, then start crawling and take out a scoped weapon. FROGS will be at the end of this corridor thing, shoot them in the head. Run to the end of the corridor will you cant go any further. You will notice a gekko guarding the door you need to get into, ignore it for now, instead take out the sniper atop the large tower. The USS Missouri will destroy the gekko guarding the door. Once it has been destroyed, wait for the other gekko to come check it out, then run and open the door, run straight into the elevator and your done.
Command Center
All you have to do is here is kill/tranquilize the FROGs. There will be many of them, so make use of the computers and walls around you to take cover. Stay on the walls of the room so you will not get shot from behind. Watch out for the ones sniping you from the balcony. Use a 200 round machine gun or p90 if you have one, it makes it much easier, and watch out for the snipers.
Screaming Mantis
After defeating all those FROGs, the final member of the Beauty and the Beast Unit arrives – Screaming Mantis. The battle reeks of the battle with Psycho Mantis in Metal Gear Solid, just don't try to change your controller port!
If you talk to Otacon, he'll guess she's using people's nanomachines to take control of them. Notice you can't aim at her. The gun keeps getting nudged aside... Use the Syringe on yourself.
1. She makes the FROGs shoot at you.
2. She makes Meryl shoot at you.
3. She makes Meryl shoot herself.
Use a CQC chokehold on Meryl, and inject her with the Syringe.
Keep shooting Mantis, but notice that she takes no damage, but when you hit one of the dolls, she buckles in pain. You need the Mantis doll, but the Sorrow doll is a nice trophy. You need to shoot it around 4 or 5 times before she will drop it, and when she does, hurry to grab it.
Shoot her once with the Mantis doll and shake the SIXAXIS to kill her. It counts as a non-lethal kill as well, so don't worry if you're aiming for a No-Kill Run.
Screaming Beauty. This fight is the same as the other Beauty fights. The Screaming Mantis doll is in the doorway you came from. Collecting all the dolls unlocks the Solar gun. Screaming Beauty facecap if you kill her non lethally.
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Missile Hanger
There will be Scarabs for the next few rooms, so use a chaff grenade and run through the hallway. If any of them grab Snake, just do a forward roll and keep on going. You can mow down a few to earn some Drebin Points, but there's no point in trying to kill them all: they just keep on coming. If you want to buy any discounted weapons for your next playthrough, now is your last chance!
Next, you will have to make Snake suffer through the hallway of microwaves. All you have to do is keep pressing Triangle when it tells you to and force Snake to the end of the hallway. This is possibly one of the most touching and heart wrenching scenes in the whole Metal Gear Saga...
Ship Exterior
The final battle with Liquid Ocelot is here. Instead of shooting him, you must fight him with your bare fists. Only a fool trusts his life to a weapon! The battle is split into three parts. If you die in one of the later fights, you'll have to start at the beginning.
Liquid Snake
This fight is similar to how you fought Liquid Snake in MGS and is the easiest of the three fights. A good tactic to use is to corner Liquid and repeatedly hold L1 and then press R1 for a strong punch. If you do this correctly, you will keep attacking him before he even gets a chance to hit you, saving your life for the next fights.
DID YOU KNOW that when you press the TRIANGLE button to make Snake do a taunt, Liquid Ocelot won't come near you, no matter how many times you taunt!!!! a little secret here is to taunt when Liquid Ocelot is taunting you, because when he taunts, his life goes back up a bit. But if you taunt when he does, then YOUR LIFE GOES BACK UP TOO!!!! This will only work if you taunt when he does! Keep that in mind throughout the battle!
Liquid Ocelot
Now Liquid Ocelot's attacks are much stronger, so be careful of when he unleashes a really powerful punch that can take out 1/4 of your health. This fight is much tougher than the first one, so be careful near him. A good tactic to use is after he uses his powerful punch, use CQC against him by holding R1 near him or use the dash attack by pressing X and then R1. Then, stay some distance from him so that he will do the powerful punch attack again and repeat.
Ocelot
For the third fight, it is a CQC brawl. Hence, you can expect Ocelot to use a lot more CQC then you ever want to think about. You can also CQC him, or just beat the crap out of him the old-fashioned way. But be warned, if you get to close to Ocelot, he can headbutt you, which is not only unblockable, but can also deal a great deal of pain. And the sleeper hold. GAAHH! This is the most annoying attack Ocelot has, which forces you to flick the control stick back and forth until you free yourself. Use the triangle prompt to treat him to a nice elbow strike to the kidneys.
After finishing this fight, both Snake and Ocelot will have become tired out and you'll have a final easy fight, where all you have to do is press R1 near him, eventually ending Liquid Ocelot's life, completing the game. Be careful, though, as it is possible to die during this section of the fight.
Now sit back and watch the long, but well deserved ending!
Refference: metalgear.wikia.com
