Metal Gear Solid V: Ground Zeroes

This achievement is attained during the "Ground Zeroes" mission. You will need to rescue the prisoner that is brought out to be executed close to the first area of the map, however, they will not be there from the spawn and will only appear later on during the mission after rescuing Chico from the prison camp.

This prisoner can be found in the area just down the hill and to the left of the initial starting location, and they will be accompanied by 3+ guards which you will need to take down. After clearing them out, you'll want to pick up this prisoner, call in the chopper using the menu, and extract them before returning to the mission, unlocking the achievement.

It is not recommended to pair this achievement this an S Rank walkthrough.

This achievement is easy. As soon as you load up the mission take out the guy in the light house straight in front of you. Then proceed left through the gate in front of you. There will be a guy on the road who starts talking to another, wait a min or so the he will walk away and take the guy still there out. Then just to the left will be another light house, take this guy out then all you need to form here is take the prisoner to the LZ.

Written by my friend Rave Monkey87 i am posting it becase it wouldnt let him

The prisoner who you need to rescue is in a ditch with tents near the beginning of the mission, right after the first locked fence. Before going to the fence, take out the guard in the guard tower who is shining a spotlight, by going to the right of it and up some rocks. Shoot him with your silent pistol and proceed crouched to the locked fence. Wait for a jeep and a truck to both pass to your left. The two guards by the fence will separate. When the truck disappears off of your map (if you identified it with your binoculars) open the fence. Push through gently and proceed to the left to a red and white barrel. There will be a guard around the corner to the right. Put him to sleep. Pick up his body and put it in the booth diagonally to the left. Climb the guard tower next to it and wait for the guard up there to finish speaking on the walkie then melee him (R trigger). Take over the spotlight and aim it to the left by the outhouses and you can see the prisoner who you need to rescue. At this point, if u have done everything I have written you should be able to pick up the prisoner (hold B button) and re-trace your steps back to the beginning cliff you started at. Call in your helicopter right away to said cliff (start button, menu index, third option down, SW landing zone on the map) as it takes a minute or so to arrive. Put the prisoner on the chopper (Hold B) and the achievement should unlock.
Sorry for the long solution, but it's my first time writing a solution for TA and I felt it would be better to explain everything than to be vague and have several questions asked. Good luck and happy hunting...

A little more stealthier way to the achievement . Reminder the achievement will pop during mission you don't have to finish mission unless you want the cassette tape you get for doing so

I can confirm that this prisoner is in the camp to the left of where you start at the beginning of the mission - you do not need to rescue Chico first, or do anything interesting or unique to make this guy available for rescue.

And it is actually easier if you make this guy your first priority at the start of the mission for two reasons:
1.) He is right there, so no backtracking required.
2.) If you get him first, you only have two stationary guards to deal with in that camp (one in the watchtower, the other standing in front of the camp entrance below the watchtower). If you save Chico pr Paz first, and then go for this guy, you will have 3+ guards circling the prisoner within varying parameters. If you are going for stealth, this will cause additional, and unecessary, difficulty.

Here is what you need to do:

STEP 1: Start the mission.
STEP 2: Take out out the guard in the watchtower directly in front of you.
STEP 3: Wait for the two guards on the other side of the fence to finish talking, and start their respective patrols.
STEP 4: unlock the gate, and neutralize the guard that took off to the left (hide the body).
STEP 5: Continue left on the road until you can make visual confrimation of the guard standing in front of the entrance to the small encampment. Take him out (don't worry about his body).
STEP 6: To save ammo, I would advise simply climbing the watchtower and choking the guard out. No need to worry about his body either.
STEP 7: Go down into the encampment, and turn left. The tent at the corner from where you came in has the prisoner in question. Pick him up.
STEP 8: Press and call in your chopper to rendezvous where you started the mission.
STEP 9: Get to the chopper (backtrack the way you came into the mission).

The achievement will pop once he is in the chopper, however I would advise continuing the mission from there. If you remain out of the enemies line of sight, as well as not kill anyone, and rescue all the prisoners in Chico's area while keeping all this under ~40 mins (with next to no retries - i.e. checkpoint abuse), then the S Rank is yours.

If you want the S rank, I found going after Paz first made it easier for me. Getting Chico first increases the concentration of guards around Paz, and vice versa. I had less difficulty with increased numbers around Chico simply because they were all out in the open (much easier to mark, track, and neutralize ).

Questions, corrections and neg vote justifications below.

Really easy.

1- As soon as the mission starts, select the pistol gun (push down on the D-pad ) and do not change it again until the end of the mission.

2- Fall down and wait for the searchlight to move pass your spot then sprint forward hugging the wall on your right towards the man in the watch tower BUT STOP RUNNING BEFORE you move too close to him. Aim at his head (headshots with the pistol gun put enemies to sleep right away) and shoot him.

3- Turn to your left. Pick either one of the 2 guys that are talking beyond the gate. You are going to need to perform 2 headshots here through the gate and in a short amount of time, the second of which will be during a few seconds of slow motion.

4- After they're both down, pick the lock at the gate and once you open it bring their bodies behind cover.

5- Now, go through the gate again, to the left. Fall down into the pit and start moving behind the tents towards this other watch tower. Before putting the guy in the tower to sleep though, you will have to deal with a guy that is guarding the tents. If he sees you you will have a few seconds again to shoot him in slow motion. Then climb the tower and put the watcher to sleep by pressing the once you are close enough of him and then mashing the (the other options are to press to kill him or to demand information, neither of which interests us right now).

6- Once all of the above enemies are taken care of, your path is clean. Grab the prisioner who is below, by the tents and close to the second to last guard you took care of, press , select the helicopter to come and meet you in the same landing zone from the beginning of the mission simply by pointing with the cursor on the circle and pressing . Run there, wait for it to go down and for the option to place the prisioner aboard to show (you just need to hold when it's time). Move away, go complete the rest of the mission. The achievement will unlock shortly after you start walking away from the helicopter.

Unlike Maka said, it's totally cool to cumulate this achievement while pursuing a "S" rank on this mission. I just did it and by rescuing all 7 prisioners (Chico, Paz and the other 5 unnamed ones, including the one from this achievement) I got over 20k points. That many plus another 20 something k made my final score "S" in a single run.

If this solution helps you in any way, please leave it a thumbs up to let me know.

Plan to rescue the escapee during your first playthrough of the main mission. He is worth 7,000 points--3,500 as a rescued prisoner and 3,500 as an escapee. He is in an unsupervised area so it is an easy task. It is best not to extract him individually. I recommend extracting him with Paz.

Pick the lock on the gate closest to the start point after taking out the watch tower guard and the two guards near the gate. Turn left and take an immediate right into a small compound. The escapee is located in the far left corner. Although the area is relatively safe, stay low to avoid detection. Retrace your steps. I recommend postponing the extraction and combining it with Paz. If you choose to do so, hide the escapee just outside the gate concealed by a tarpaulin on the fence. You may elect to call the chopper and extract the escapee immediately unlocking the achievement when you put the escapee on the chopper. If you combine the extraction with Paz's or Chico's, make sure you put the escapee on the helo before the mission prisoner. When you do so, you will pop the achievement.

In my opinion, the most efficient approach to the game is to rescue all prisoners including the escapee during the first playthrough obtaining an S rank as you do so. You then must do a second playthrough to mark all enemies and unlock an additional trial. This is not possible during the very first playthrough. In this second playthrough, score is not important so it is ideal for collecting cassette tapes and insignia. The following is a video that shows how to rescue the escapee and all other prisoners getting an S ranking in the process: