How to complete Install UV Protocol from secure room and tag marked locations in Marathon – Protect/Destroy 3 guide

The Protect/Destroy 3 contract in Marathon requires you to complete two tasks in a single run, and knowing what you need to do will ease the process. Compared to the first two Protect/Destroy contracts, the third one is relatively easier. However, you can easily get confused on the map while trying to complete the objectives. Let's look at how to finish both tasks in a quick time.Table of contentsMarathon Protect/Destroy 3 contract guideHow to Install UV Protocol from secure room in southwest IntersectionHow to tag marked locations across Dire MarshMarathon Protect/Destroy 3 contract guide The Protect/Destroy 3 contract can be broken down into the following parts.Install UV Protocol from secure room in southwest IntersectionTag marked locations across Dire MarshHow to Install UV Protocol from secure room in southwest Intersection Screenshot and remix by Destructoid The first task is to install the UV Protocol, which is located in a secure room in the Intersection location. I have marked the exact spot on Dire Marsh. The room is protected by lasers, and you have to destroy the power boxes so as not to take any damage. Image via Bungie Three of the boxes are on the exterior walls, while the remaining one is inside (above the doorway). Once you've destroyed the power boxes, go upstairs, and the quest marker will show the location of the cabinet. From there, you can collect the UV Protocol. Image via Bungie How to tag marked locations across Dire Marsh Screenshot and remix by Destructoid The second task involves tagging three marked locations in either Compelx, Maintenance, or AI Uplink. The Maintenance POI is closest from Intersection. What you're looking for are three blank walls, and their locations pop up only when you're near them. I have marked the spots on the image above. Image via Bungie Go up to the roof on the east side, and head north. You'll find a wall in front of you that divides the roof. Tag this wall, and it covers one spot (marked as 1). Image via Bungie You'll find a red staircase in the middle of the northern entrance. You don't need to take the stairs; just tag the supporting wall by the three crates (marked as 2). Image via Bungie The last one is a large pillar in the center of the hangar bay to the south of Maintenance. The pillar is easy to find since it's supporting the roof. Reach for the ledge and jump up to the small walls on the side. This will be your third and final spot (marked as 3). This will wrap up the Protect/Destroy 3 contract, and you can proceed to finish the remaining two. The post How to complete Install UV Protocol from secure room and tag marked locations in Marathon – Protect/Destroy 3 guide appeared first on Destructoid.

Mar 7, 2026 - 03:00
How to complete Install UV Protocol from secure room and tag marked locations in Marathon – Protect/Destroy 3 guide


The Protect/Destroy 3 contract in Marathon requires you to complete two tasks in a single run, and knowing what you need to do will ease the process.

Compared to the first two Protect/Destroy contracts, the third one is relatively easier. However, you can easily get confused on the map while trying to complete the objectives. Let's look at how to finish both tasks in a quick time.

Table of contents
Marathon Protect/Destroy 3 contract guide
The Protect/Destroy 3 contract can be broken down into the following parts.

  • Install UV Protocol from secure room in southwest Intersection
  • Tag marked locations across Dire Marsh
How to Install UV Protocol from secure room in southwest Intersection
Screenshot and remix by Destructoid The first task is to install the UV Protocol, which is located in a secure room in the Intersection location. I have marked the exact spot on Dire Marsh. The room is protected by lasers, and you have to destroy the power boxes so as not to take any damage.

Image via Bungie Three of the boxes are on the exterior walls, while the remaining one is inside (above the doorway). Once you've destroyed the power boxes, go upstairs, and the quest marker will show the location of the cabinet. From there, you can collect the UV Protocol.

Image via Bungie
How to tag marked locations across Dire Marsh
Screenshot and remix by Destructoid The second task involves tagging three marked locations in either Compelx, Maintenance, or AI Uplink. The Maintenance POI is closest from Intersection. What you're looking for are three blank walls, and their locations pop up only when you're near them. I have marked the spots on the image above.

Image via Bungie
  • Go up to the roof on the east side, and head north. You'll find a wall in front of you that divides the roof. Tag this wall, and it covers one spot (marked as 1).
Image via Bungie
  • You'll find a red staircase in the middle of the northern entrance. You don't need to take the stairs; just tag the supporting wall by the three crates (marked as 2).
Image via Bungie
  • The last one is a large pillar in the center of the hangar bay to the south of Maintenance. The pillar is easy to find since it's supporting the roof. Reach for the ledge and jump up to the small walls on the side. This will be your third and final spot (marked as 3).
This will wrap up the Protect/Destroy 3 contract, and you can proceed to finish the remaining two.

The post How to complete Install UV Protocol from secure room and tag marked locations in Marathon – Protect/Destroy 3 guide appeared first on Destructoid.

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