The Prisoner is a type of UNSC Audio log that you get in Halo Infinite. There is a total of 7 The Prisoner UNSC Audio Logs in the game and this guide shows the locations of all of them. Click here to see the locations of all 37 UNSC Audio Logs.
1) The Prisoner UNSC Audio Log 1/7: Not My Fault (Foundation)
During the second mission (Foundation), you will have to find a Power Seed for the elevator. To find it you will reach a large room with a bridge. At the end of the bridge, you will find the audio log near the power seed. If you complete the mission without collecting it, then you will have to replay the campaign to it.
2) The Prisoner UNSC Audio Log 2/7: What Was Inside (The Tower)
In The Tower mission, after activating the Gravity Lift, take it to the top of the tower. Here you will find the Mjolnir Armor. After interacting with it, take the ramp to the next level. You will find the audio log at the foot of a pillar on this level.
3) The Prisoner UNSC Audio Log 3/7: She Was Smiling (Excavation Site)
In the Excavation Site, use the gravity lift to enter the structure. This audio log is around the corner near the gravity lift.
4) The Prisoner UNSC Audio Log 4/7: Easy to Break (Spire)
You will get it during the Spire mission. This audio log can be picked up outside of the mission area. This UNSC Audio Log is located on the eastern side of the Forerunner structure as shown on the map.
5) The Prisoner UNSC Audio Log 5/7: Barely Anything Left (Nexus)
During the Nexus mission, you will come to a large hall with three power crucibles. Here you will have to find three power seeds. The large hall will have four doors. As you go through one of the doors (see the picture below) to collect one of the three power seeds, you will find the audio log in the corridor. The audio log will be resting against the wall near a weapon rack as shown in the second picture below.
6) The Prisoner UNSC Audio Log 6/7: Price Paid (Repository)
In the Repository mission, after the cutscene with Weapon (where you get the 1st UNSC Audio log of the area), you’ll get a split path in a large room to go either left or right. Head to the left path and follow the linear path to a smaller workroom. Here you will find 2nd Audio Log placed on top of a desk with a hologram of the Halo ring.
7) The Prisoner UNSC Audio Log 7/7: 42410-02214-LB (House of Reckoning)
Soon after the start of House of Reckoning, you will reach the UNSC battle training room with a mock UNSC battleground at the center as shown in the picture below. On the right side of the room, you will find the audio log kept on a table near the ramp as shown in the pictures below.