Snake's Revenge/Part 2

The Dock
You will find yourself outdoors again, at the port. You will receive a call from Nick, who will inform you that John should be aboard the ship. All you have to do in this area is to go north, eliminating the enemies you encounter. Nothing complicated. As soon as you get on the ship, it will start moving and you will never be able to go back.

On the ship
On the first screen, go left. Open the top door with Pass Card 2 to fill up on truth gas. Then go back to the first screen and this time go right. Open the door with Pass Card 2 and enter. Open the door to the north to free a prisoner, who will tell you that John is somewhere else and that there is something important on the bottom of the ship. Exit and go right. Open the door on the right with Pass Card 1 to stock up on grenades. Go north and open the door you find with Pass Card 1. Force the hostage to talk to the truth gas and it will tell you that the Metal Gear has no weak points and will suggest you sink the ship. Exit, go right and open the door at the bottom with Pass Card 2 to go back outside. Go north and open the door at the bottom with Pass Card 2 to stock up on plastic explosives. With that done, go left and then south. You can ignore the door on the right for now. Head south again to return to the first screen and this time enter the grate to the north. Use the elevator to go down to the floor below (going lower is useless for now). Go right and then north, ignoring the door on the left for now because you still can’t open it. On the next screen you will receive a call from the pilot. Then go left. Open the door at the bottom to find a flare gun. Then go back and this time go right. First open the south door with Pass Card 2. You can start collecting claymore mines. Finally, open the door to the north with Pass Card 1 and prepare yourself for a tough battle.

Boss fight - Grenader Unit
As soon as you cross the door you will find yourself locked in this room with three enemies who will throw grenades at you, from as many holes protected by barricades. In this battle it is essential to keep moving, so as not to be hit by enemy grenades. Enemies will throw the grenades where you are at that moment, but since the grenades take a few moments to reach you, you will be able to avoid them. Their attacks aren't too hard to dodge, but you'll still need to be very careful, as a single grenade will take away 4 notches of energy, so at your current rank, two hits will be lethal. If you get hit, use a ration immediately. The best way to take out these enemies is to use your grenades in turn. So avoid their attacks and, when you have the opportunity, throw one or more grenades (the maximum you can throw at one time is 3) at one of the enemies. Try to eliminate the middle one first, when he dies things will get easier. Then focus on one of the others. It takes six grenades to kill one of these enemies, so since the maximum you can have at your current rank is 15, you won't have enough grenades to kill them all. Even if all of your grenades hit, there will be at least one enemy alive when you run out of them. At that point, you can switch to your plastic explosive and place a charge close to the enemy, between one grenade and the next. Or, if you still have some rations, you can go to his side and finish him off with some gunshots. If you have already damaged him with grenades, it will soon die. Just be careful not to pass over the holes where the other enemies were before, or you will die instantly.

After killing the three enemies, the door on the right will automatically open and you can take Pass Card 3.

The bottom of the ship
At this point, go back and use Pass Card 3 to open the door you previously could not open to find a mine detector. Go back to the elevator and go up to the deck of the ship again. Go north and open the door on the right with Pass Card 2 to get your fill of flare bombs. Then go back to the elevator and this time go down to the lowest floor.

You will arrive in a room with a single enemy. Kill him and open the door on the right with Pass Card 3. In the following rooms it is completely dark, so quickly grab the flare gun and use it to light up the area. In this room, you will notice several copies of the Metal Gear and metal sensors, which you must avoid. Go right. Also use the flare gun here to light up the room and enter the door using Pass Card 3. You will now find yourself in an ammunition depot. Place a plastic explosive on the ammo pile to detonate it and sink the ship.

The escape
The helicopter pilot will contact you, telling you to get on the ship's deck immediately and use the radar to locate the recovery point. A timer will appear in the bottom bar and the screen will start vibrating. If you don't reach the recovery point before the time runs out, it will be game over, so you better hurry up. Return as quickly as possible to the deck of the ship, using the elevator. This is the only time in the game where you will need radar. By accessing it from your transceiver, you can identify the position to reach. Go right and enter the door. Go right again and then north. An explosion will free a new passage and you will automatically reach the helicopter, saving you.

The pilot will tell you that even if you have destroyed the Metal Gear, the existence of Metal Gear 2 has been confirmed. He will also inform you that Nick is now missing and will suggest that you contact the undercover agent in the enemy base.