Arc Raiders: What We Left Behind Quest Guide

Home » Arc Raiders » Arc Raiders: What We Left Behind Quest Guide

If you just picked up “What We Left Behind” from Tian Wen, this quest will send you exploring across three different maps:

  • Dam Battlegrounds
  • Buried City
  • Spaceport

The objective is simple on paper: visit each marked location and “search” the highlighted object.
In practice? Some spots are hidden, some require a breach door, and a few are easy to miss if you’ve never been there.


Quest Overview

You must complete the following tasks:

  1. Search the South Swamp Outpost in Dam Battlegrounds
  2. Search the Raider Camp under the Parking Garage in Buried City
  3. Find Bilguun’s Hideout in Spaceport

There is no extraction requirement — once you trigger each objective, it stays completed even if you die afterward.


Dam Battlegrounds – South Swamp Outpost

📍 Location: South Swamp Outpost (southern Dam region)

Inside this outpost is a large ruined structure made from corrugated metal, almost like a tall busted tower.

How to Complete This Step

  1. Enter the South Swamp area.
  2. Look for the large, hollow metal structure.
  3. Inside, find a yellow glowing object you can interact with.
  4. Search it — objective done.

👉 This is one of the easier steps. However, this area sometimes has Patrol ARCs floating nearby, so keep your ears open.


Buried City – Parking Garage Raider Camp

📍 Location: Parking Garage — SE corner elevator shaft

You do not need to go to the top floor.
A much faster method is entering the garage through the elevator shaft on the ground floor.

How to Complete This Step

  1. Head to the Parking Garage POI in Buried City.
  2. Go to the southeast corner of the garage — you’ll find a breachable elevator shaft.
  3. Breach the elevator door on the ground floor.
  4. Inside you’ll find a zipline that drops directly into the Raider Camp below.
  5. Ride the zipline down.
  6. Search two containers inside the camp.
  7. Objective complete.

👉 This is the fastest and safest method compared to climbing the entire garage.

👉 Expect active ARC patrols (Hornets/Wasps) outside the structure — clear them first before breaching.


Spaceport – Bilguun’s Hideout

📍 Location: Container Storage → climb the outer wall → yellow hideout structure.

This is the most hidden location of the three.

How to Complete This Step

  1. Head to the Container Storage area in central Spaceport.
  2. Look for the massive wall structure behind the containers, facing east.
  3. On top of the wall is a large yellow metal hideout — this is Bilguun’s Hideout.
  4. Approach from the south side, climb the ruined section, and hop onto the platform.
  5. Enter the hideout and inspect the notes.
  6. Quest complete.

👉 Hornets sometimes patrol around the rooftops and wall edges here. If you hear that buzzing, don’t stand still.


Tips

★ You can do this with a free loadout

No special weapons or prison pocket needed. Even if you die, your progress stays.

★ Expect random ARC spawns

Across all three locations, I encountered:

  • Hornets
  • Wasps
  • Fireballs
  • Patrol drones

If one is floating nearby, handle it first — you don’t want to be interrupted inside a breach room.


Rewards for Completing “What We Left Behind”

Tian Wen gives you:

  • Muzzle Brake II
  • Vertical Grip II
  • Stable Stock II

Solid early-game upgrades.

GameNautica