If you're stuck on "What We Left Behind" in Arc Raiders, yeah, you're in good company. I kept looping the same corridors, swearing there had to be a hidden door somewhere, and it just wasn't happening. Before you burn another deploy doing that, it helps to treat this objective like a navigation problem, not a loot sweep, and keep your run funded with something like ARC Raiders Coins so you're not stressing every wasted minute.
Start With the Map, Not the Building
You're told it's "near Container Storage," and that wording messes people up. Most players hear "storage" and immediately go indoors, checking corners, stairwells, and every shadowy gap between crates. Don't. Deploy to Spaceport, head for the Container Storage landmark, then stay outside the main structure. You're looking for the perimeter, not the interior, and the faster you accept that, the less time you'll spend exposed in the open while machines wander into your path.
Head to the Southeast Perimeter Wall
Once you're at Container Storage, rotate your approach toward the southeast side of the zone. If you're circling the north or west edges, it'll feel busy and wrong, like you're constantly crossing sightlines for no payoff. The hideout sits along the outer wall, tucked against junk and broken construction pieces. On the tactical map, picture the big rectangular footprint of Container Storage. You want the bottom-right edge of that shape, just outside the boundary, then walk the wall until the rubble starts to look climbable.
Look Up, Because It's Not at Eye Level
This is the part that gets everyone, because we're trained to scan at ground height for doors and interact prompts. Bilguun's Hideout isn't a basement nook. It's higher up, like a rough little shelter perched on debris—more "scrap-built treehouse" than "secret room." When you hit the right rubble pile, tilt your view up and you should spot the structure blended into the mess. Climb the broken slabs and twisted metal to reach it, and don't rush the climb if you hear patrol audio nearby. You're exposed for a few seconds and that's usually when things go sideways.
Grab the Objective and Get Out Clean
Once you're inside the elevated shelter, you'll find what you need to advance the quest, and the whole thing suddenly feels obvious in hindsight. The smarter play is to treat it like a quick in-and-out: clear your immediate angles, loot only what's right there, then drop back down and rotate away before you attract attention. After one successful run you'll remember the route, and if you're planning more attempts, it's easier when you've got ARC Raiders Coins buy in RSVSR options in mind so a rough extraction doesn't sting as much.