Metal Gear Solid V: The Phantom Pain Walkthrough – Mission 39: [Total Stealth] Over the Fence

The prisoner is located in a locked room on the bottom level of the unfinished building within the barracks. To reach him, sneak in from the South-West corner, which will put you closest to the prisoner. By approaching from the side and maneuvering around, you can avoid nearly all the enemies in the area. Once you’re in the basement, simply grab the prisoner and escort him to a safe extraction point. This approach minimizes risk and allows for a smoother rescue operation.

The prisoner is situated in a locked room on the bottom level of the unfinished building within the barracks. To get to him, it's best to sneak in from the South-West corner, which will position you closest to the prisoner. By entering from the side and maneuvering around the perimeter, you can avoid nearly all the enemies in the area. Once you reach the basement, simply grab the prisoner and escort him to a safe location for extraction. This strategy allows you to complete the mission with minimal risk and maximum efficiency.