How to Complete What We Left Behind Quest in ARC Raiders (February 2026)

I’ve spent countless hours diving into the world of ARC Raiders, and let me tell you, the “What We Left Behind” quest from Tian Wen had me scratching my head more than once. If you’re anything like me, you want to get these quests done efficiently without running around like a headless chicken. Well, you’re in luck! I’m going to walk you through every single step of this quest so you can complete it without breaking a sweat.

What Is the What We Left Behind Quest?

Before we dive into the nitty-gritty, let me give you the lowdown on what this quest is all about. Tian Wen, Speranza’s resident weapons expert (and honestly, a bit of a gun nut), wants you to scavenge three specific locations across different maps. She’s looking for valuable materials and intel left behind by previous Raiders.

The quest requires you to visit three separate maps:

  • Buried City
  • Dam Battlegrounds
  • Spaceport

Each location has its own challenges, and I’ll be honest with you – some of them can be pretty tricky to find if you don’t know exactly where to look. But don’t worry, I’ve got your back!

Quest Overview and Requirements

Here’s a quick breakdown of what you’ll need to do:

LocationObjectiveWhat You’re Looking For
Buried CitySearch 2 containers in Raider CampAny 2 containers in the underground camp
Dam BattlegroundsFind something significantYellow-marked documents in main building
SpaceportFind something significantYellow-marked notes in Bilguun’s Hideout

The best part? You don’t need to bring any specific items for these expeditions. I recommend going with a free loadout if you’re worried about losing your precious gear. Trust me, I’ve learned this the hard way!

Buried City: Raider Camp Beneath Parking Garage

Let’s start with the first location, which honestly gave me the most trouble when I first attempted this quest.

Step-by-Step Guide:

  1. Launch a match on Buried City – Pretty straightforward, right? But here’s where it gets interesting.
  2. Head to the Parking Garage – You’ll find this POI near the center of the map, close to Marano Park. Be careful though, this area is usually crawling with ARC enemies, including those pesky Pops inside the building itself.
  3. Find the breach door – Look for a door you can breach in the southwest corner of the ground floor. It’s easy to miss if you’re not paying attention, so keep your eyes peeled.
  4. Take the zipline down – Once you breach the door, you’ll see a zipline that takes you to the bottom floor. This area is mostly buried in sand, which gives it that creepy, abandoned vibe.
  5. Search two containers – In the center of this underground area, you’ll find a makeshift Raider camp with several containers. You need to search any two of them to complete this objective. I usually go for the long case and the bag behind the corrugated metal – they’re the easiest to spot.

Pro Tip: There’s a chance a weapon crate will spawn here that can drop Purple Rarity weapons. I’ve scored some pretty sweet gear from this spot, so keep your eyes open!

My Personal Experience:

When I first tried this, I spent like 20 minutes searching the wrong part of the Parking Garage. I was looking for containers on the ground floor and getting frustrated because nothing was working. Then I realized I needed to go underground! Don’t make my mistake – look for that breach door immediately.

Dam Battlegrounds: South Swamp Outpost

Thankfully, this next location is much easier to find. I actually breathed a sigh of relief when I got to this part.

Step-by-Step Guide:

  1. Launch a match on Dam Battlegrounds – You know the drill by now.
  2. Head to South Swamp Outpost – This POI is located in the western part of the map, near the Water Treatment Control facility. You can’t miss it – it’s a large cylindrical building that looks kind of like a silo.
  3. Enter the main building – The building has multiple entry points, so you can get in from various sides. I usually approach from the south side as it tends to have fewer enemies.
  4. Find the yellow-marked item – Inside the building, you’ll find some documents on a table marked with a yellow search icon. This is what you’re looking for! Just interact with it to complete this part of the quest.

Pro Tip: This area has plenty of ARC enemies, so clear them out before going for the objective. I learned this the hard way when I got ambushed while trying to grab the documents!

My Personal Experience:

This was actually the easiest part of the quest for me. The building is pretty distinctive, and once you’re inside, the yellow marker makes it impossible to miss what you’re looking for. I’d recommend doing this part first if you want to build some confidence before tackling the trickier locations.

Spaceport: Bilguun’s Hideout

Alright, here’s where things get interesting. This location tripped me up for a good while, and I’m not ashamed to admit it. The quest description just says “search for anything significant,” which is about as helpful as a screen door on a submarine.

Step-by-Step Guide:

  1. Launch a match on Spaceport – Final stretch, you’ve got this!
  2. Head to Container Storage – This POI is located near the center of the map. You’ll want to go to the eastern side of this area.
  3. Find the wall – Look for the large wall behind the Container Storage building. Bilguun’s Hideout is actually ON TOP of this wall, not at ground level. This is what confused me for so long!
  4. Climb up – You’ll need to find broken sections of the wall to the north or south where you can climb up. I prefer the southern approach as it tends to be less exposed to sniper fire.
  5. Locate the hideout – Once you’re on top of the wall, you’ll see a metal Raider camp structure hanging off the side. That’s Bilguun’s Hideout!
  6. Collect the notes – Inside, you’ll find notes marked with a yellow identifier. Grab them to complete this final part of the quest.

Pro Tip: This area can be a sniper’s paradise, so move carefully when climbing up. I’d recommend using cover and checking your surroundings before making the climb.

My Personal Experience:

Oh man, this part frustrated me so much! I kept searching around Container Storage at ground level, wondering why nothing was working. I must have spent a good 30 minutes circling that area before I realized I needed to go UP. Don’t be like me – look for the climbing spots immediately!

Common Issues and How to Fix Them

Based on my experience and what I’ve seen from other players, here are some common problems you might encounter:

Bug at Bilguun’s Hideout

Sometimes, the high-tier loot at Bilguun’s Hideout fails to register when you add it to your inventory. This happened to me twice, and it’s incredibly frustrating. Here’s how to fix it:

  • Extract and revisit – The only solution is to extract from the mission and then redo the Spaceport portion. I know it’s annoying, but it’s the only way to get the quest to progress properly.
  • Try a different item – Sometimes, specific items might be bugged. If one item doesn’t work, try interacting with a different one in the same area.

Can’t Find the Breach Door in Buried City

If you’re having trouble finding the breach door in the Parking Garage:

  • Check the southwest corner – It’s specifically in the southwest corner of the ground floor.
  • Look for the breach prompt – When you’re close enough, you’ll see the breach option appear on screen.
  • Clear enemies first – Sometimes enemies can block your path or make it hard to see the door.

Quest Rewards

So, what do you get for completing this quest? Let me tell you, it’s worth the effort! Tian Wen rewards you with some pretty sweet weapon attachments:

  • Muzzle Brake II – Great for reducing recoil
  • Vertical Grip II – Improves weapon stability
  • Stable Stock II – Even more stability for your weapons

These attachments can seriously improve your weapon performance, especially if you’re like me and tend to spray and pray during intense firefights.

Tips for Success

Before I wrap this up, let me share some additional tips that I’ve picked up from completing this quest multiple times:

General Tips:

  1. Go with a free loadout – Unless you’re super confident, there’s no need to risk your best gear.
  2. Play during off-peak hours – Fewer players mean less chance of getting into PvP situations you didn’t ask for.
  3. Bring healing items – Better safe than sorry, right?
  4. Check your map regularly – The POIs are marked, so use them to navigate efficiently.

Location-Specific Tips:

Buried City:

  • Close doors behind you when going down the zipline to slow down any pursuing players
  • The ground floor of the underground area has fewer enemies than other floors

Dam Battlegrounds:

  • The South Swamp Outpost building has multiple entrances – use this to your advantage
  • Clear the area outside first before entering the main building

Spaceport:

  • Use the broken wall sections to climb up to Bilguun’s Hideout
  • Be aware of sniper positions when on top of the wall

Frequently Asked Questions

How long does this quest take to complete?

From my experience, you’re looking at about 45-60 minutes total, assuming you don’t run into any bugs or get sidetracked by other loot opportunities. Each location takes about 15-20 minutes to complete if you know where you’re going.

Can I complete all objectives in one match?

Unfortunately, no. Each objective requires a separate match on a different map. You’ll need to complete three separate matches to finish this quest.

What level should I be before attempting this quest?

I’d recommend being at least level 10-15 before attempting this quest. The enemies can be pretty tough, especially if you’re underleveled. Plus, you’ll want some decent skills unlocked to make your life easier.

Is this quest worth doing?

Absolutely! The weapon attachments you get as rewards are really good, and the quest itself helps you learn the maps better. I’ve found that completing this quest made me much more familiar with the three maps involved.

What happens if I die before completing an objective?

If you die before completing an objective, you’ll lose any loot you’ve collected but the quest progress should save. However, you’ll need to start a new match to continue from where you left off. This is why I recommend using a free loadout!

Final Thoughts

The “What We Left Behind” quest might seem daunting at first, but I promise it’s totally doable once you know where to look. I’ve completed this quest multiple times now, and it gets easier every time. The key is knowing exactly where each objective is located and being prepared for what you’ll encounter.

Remember, the most challenging part is usually finding Bilguun’s Hideout in Spaceport, but now that you know it’s on top of the wall, you should have no trouble. And if you run into the bug where the item doesn’t register, just extract and try again – it’s annoying but fixable.

I hope this guide helps you complete this quest without all the frustration I went through. Happy raiding, and may your loot be legendary!

Bookmark this page for future reference – I’ll be updating it as new information becomes available or if any changes are made to the quest in future updates!

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