The Boss Extreme Walkthrough

Boss Extreme Walkthrough
This is from the Metal Gear Solid 4 Walkthrough page

Criteria
For the Big Boss Emblem you will need to achieve each of the following
 * Complete the game in less than 5 hours
 * Use no continues
 * Use no health items e.g. rations, regain, etc.
 * Kill no enemies (You can kill bosses but not the beauties, I’m not yet sure about Vamp but I’ll find out)
 * No alert phases (cautions are allowed)
 * No special items (stealth, bandana)

Ground Zero
Don't bother with the ration under the truck, we won't be using any anyway. Just head straight to the truck on the left and crawl under. After the cutscene make sure you take the left route. When the GEKKO's arrive, stick to the left side of the street, once you pass the first GEKKO stick to the right until you leave the area.

Red Zone NW Sector
Once you arrive on the large street, take an immediate right into a little room. There should be a box, and next to it a can, run into the can, pause for just 1 second then continue, if you did it right, the 2 guards will go to where the sound was and you can carry on (this also prevents the tank cutscene). Leave the room through the doorway and don't stop running. Stick to the right of the street, past the tank until you reach a destroyed vehicle. This is where you need to make a decision, for the quick way, turn right and shoot the barrel ahead of you, it can be quite hard to see. Both PMC's in the area will now be scared run down the middle passage, you can even run into the PMC and at the end, take a right and leave the area, for this to work you need to be as fast as possible, listen out for the alert sound when you leave because, reinforcements will be coming from there, that's why you need to be quick. For the easy way, you still turn right but instead stun knife the PMC's, go down the middle passage and turn right making sure you aren't seen.

Red Zone part 1
Don't go up the steps, instead run straight to the right and stand behind the 2 stacked boxes, if you look to the right there is a PMC. Wait until he turns away and then wait another second. Run ahead and as soon as the archways start, go inside, very slowly crouch towards the ladder, you may need to lie down, it just depends on the timing. When you climb the ladder, lie down and move forwards for 4 seconds, then it is safe to stand and run, at the end drop off and start crouching. slowly go around the corner and stun knife the PMC that’s in your way, wait until the other sets off and you then need to time your run right, you need to avoid being heard by the PMC who just set off and avoid being seen by the PMC's ahead and behind you.

Red Zone part 2
Don’t forget you will have face camo available from now on. Equip the Militia Disguise, I don’t know if this applies to you but I think that having NV (Night Vision) turned on really helps headshots, anyway tranq. the three PMC’s. Continue staying reasonably close to the barriers, you won’t be seen at the big gap. Stick to the right hand wall and enter the opening, crouch to avoid being seen and continue to the other side. Enter the Militia Safe House

Militia Safe House
Just run through as fast as you can, after all you have the Militia Disguise, near the start there are three dead ends, one of which has tranq. ammo, make sure you get it, never miss out on an opportunity. Give away ration to the Militia to keep them extra friendly.

Urban Ruins
Just don’t waste your time picking things up and get through as quickly as you can.

Downtown
Head forward and take the first right, follow the alleyway, at the end there should be some militia. When you get to the point where Otacon mentions there being snipers, take a left and keep looking right until you see a very narrow space between two walls, wall press and get to the other side turn right twice then left. You will know if you are quick because if you are you will see a tank passing, it’s OK if you don’t though. You should see a large street ahead of you but go behind the bunch of 4 boxes and turn left immediately, where you will see another 2 next to a doorway. Go through the doorway, past the stairs, turn left and then out of the window. Turn right and then look left where you will see a vehicle, get behind it then once the first guard is at the left side of the van you crouch to the right slowly advance towards the front while being careful not to alert the second guard who will soon follow the first. Now there should be three bits of wall that stick out the third will have a vase near it. Take cover behind the second one to avoid being seen by the soon to arrive guards. They will move to your left and stop for a while, once they have gone move forward to what is now you right, and turn the corner. Stick to the right whilst crouching using the first vehicle as cover, keep moving until you come across a crawlspace. go through and when you come out you should be with some Militia. Move forwards crouching and turn the corner where the boxes are, make sure you stick to the boxes to avoid being seen. Enter through the door.

Advent Palace
Just make sure you get rid of all traps before you get to the bar. If you know you aren't in a rush for time collect them by lying on them oor by using the Metal Gear Mk.2

Advent Palace, Escape
Before anything, DON'T SHOOT ANY FROGS CLINGING TO A WALL OR CEILING Equip octocamo and facecamo as well as Mk.2 with night vision on the solid eye,. If you have the solar gun it will be useful because we don't want to use too much tranq. ammo. In case you don't have it I won't use it. Lie down in front of the Rat Patrol but not outside. You should only use 3 tranq. bullets on this first part, two for the ones on the roof and one so you don't get shot at forever because the stupid team your with can't aim and kill the FROGS. Also Because your solid eye tells you how much health an enemy has, you can shoot them eith the operator in the leg or arm to damge them slightly and help out while not killing them. Once the FROGS are dealt with dont follow the team but lokk left to find a crawlspace. Enter it and ignore all of Otacon's comments, after all what does a super intelligent clever computer programmer scientisty person know??? When you reach the noodles take a right and have a stun grenade at hand with a smoke grenade in your inventory continue until you reach a hole in the floor throw a stun grenade down first follwed by a smoke grenade, RAT Patrol should kill most of them but you may have to tranq one or two. Once you are sure there aren't any FROGS below you, drop down and find the kitchen, tranq. any frogs in there and the look to the right of where you entered, go throught his door and make an immediate right, lie down and release the Metal Gear Mk.2 (this is also an opportunity for you to recover your health). Look at your map on the pause menu, take the MG Mk.2 around where there are 2 blocked paths and clear all of the FROGS. You will want to go back to the kitchen now unless you want to be attacked by 5 FROGS. Clear the area you were just in, and then tranq. the 3 FROGS who will come into the kitchen. Follow the group down the stairs turn right and continue to the bathroom, take a break here and recover any lost health (make sure you are in the one with a hole in the wall. When the other bathroom wall explodes and Akiba/Johnny is knocked out throw a stun and smoke grenade through the hole. Wake Akiba when you are safe. Just watch out here, your team can't die here die here (unless you help to kill them), even if you don't help so just focus on keeping yourself alive! When you get down the hole and into the next fight it's just best to stay out of it and let the team do the work if you don't feel confident. Get the stun grenades straight after you drop down aswell. In one of the rooms you will find a nice helping of tranq. ammo. When finished, jump down the shaft and SAVE!!!!!!

Advent Palace, Garage
Collect the FROG doll if you didn't get it in the first playthrough, it's one of the 5 items needed for the all powerful Solar Gun.

Crescent Meridian
Run to the opening on the right (after the tank scene) crawl all the way to the crawlspace and then through turn left at the end the right and stick to the wall, keep going, once you get to the end of where there is a change of terrain height stand and run while staying to the right. On your left there will be some PMC's behind sandbags, just before you are in line with them, crouch, not so far behind them is a ladder which is where you are headed, keep going until you are in line with the ladder then approach and climb, follow the route until you reach a cutscene.

Millenium Park
You may want to save at the start of this area, you will need to get some difficult headshots. Ignore all the weapons and continue until you can see both the PMC's, tranq. them. If you look to the left of the burning car you will see some boxes, while crouching, run towards them, the lone PMC should see you and then pause, while he is headed in your direction(or when he stops), tranq. him. Slowly look around the corner and tranq. the PMC against the wall, NV helps. Next target the PMC on the turret, again try and use NV. Take out the 3 PMC's arund the fountain any way you like, the way you do this will depend on how quickly you take out the first lot. Once they are dealt with, use the Mosin Nagant to take out the PMC in the tower. Hide, behind the boxes at the right of the entrance to the new area, tranq. the PMC to the right of the boxes, move straight right and at the end of the tent look left and tranq. the PMC. Slowly make your way to the door. Note - following this your time should be around 45 minutes (I was at 32 minutes)

Cove Valley Village
Crawl along the edge of the cliff where you start but not too far that you are seen. Take everyone out (not the rebels) and as soon as you have, drop down, get ready to stun knife the PMC who is about to come out of the door ahead on the left. Look at the right side of your map on the pause menu and take the top route (under the steps of the most North East building are some smoke grenades). Turn NV on and you will see a guard walking away creep up on him, tranq. him or get to the same height and use the Mk.2. For the next area you will have to find your own strategy because one slight action makes a big difference to where things are. In the next area, look out on the right for a crawlspace, it will have 20 tranq. bullets. Go to the other end and keep moving right, make sure you stay on the floor until you get to where there is a PMC up above on your right. Crouch and tranq., you can run from now on.

Power Station part 1
Go straight to the right and climb up, climb the boxes then roll over the gap. Ahead there should be a PMC, tranq. him, now look to your left, tranq. him aswell. Get to where the first PMC was and move north. using the solid eye, find out where nearby PMC's are and tranq. them, make sure you always stay low, keep that camo index high! When you reach the mortar emplacement, go to the right of it and roll/crawl down the hill. Use cover to make your way round the back of the power station.

Power Station part 2
After the Drebin cutscene you can choose between two routes, the right one is the easiest but the left has tranq. ammo, if you go right, make sure you have NV turned on so you can see the PMC's hidden above, if you go left, make sure you are always watching the solid eye, there are enemies all over. If you look at your map, you will notice there are 2 ways in the end from the power station. Personally, I think it's best to go left.

Confinement Facility
Take a look at your map at the top there are 2 ways, you want to get to the left one. There were two ways into this area, which ever way you got into this area, use the water and tranq. the guards to make your way to the left path. When you get there, tranq. any neaarby PMC's. Turn left and crawl while sticking to the cliff wall, keep going until you get to a path that goes up. (btw at this point my stress was %80.00 but you just have to put up with it. Don't take chances and make sure you get the headshot) At the end of this 'path' there will be ground at varying heights make sure you kill anyone within range before you drop down. Proceed forward and try to take out the PMC in the tower, stick to the right of the area, roll over the barrier, turn right and exit the area.