The Stable Housing quest in ARC Raiders is one of those jobs that punishes autopilot. You walk into Security Bridge in Stella Montis expecting the usual hand-holding, then the game yanks it away and dares you to use your eyes. If you're the type who keeps a mental checklist of loot and ARC Raiders Items before pushing a PvPvE hotspot, you're already thinking ahead—and you'll need that mindset here, because this run can go sideways fast when another squad hears you fighting on the stairs.
Find the safe, then stop wasting time on it
First thing: get to the third floor. Near the stairwell there's a cramped side room with the safe sitting there like it's begging to be opened. Try it and you'll get nothing. No keycard prompt that works, no "press X to win," just a dead end. That's on purpose. Don't hang around in that room too long either—people check it, and ARC units love the noise you'll make if you panic and start clearing everything. Clock the location, then move.
Go to the fourth-floor control room and force the failure
Now head up to the fourth floor control room and use the terminal to print the access card. This step matters, even though it feels pointless. The printer will fail and kick back an error. A lot of players assume they did something wrong and start re-checking every door. You didn't. The quest needs to see that failure before it'll give you the next hint, and that hint is going to be annoyingly vague about "other methods."
The code is on the third floor, hiding in plain sight
After the printer fiasco, go straight back down to the third-floor safe room. Don't start sweeping offices or hunting random desks. Look near the door at the wall panel/notice board and actually inspect it—like, stop for a second and read it. There's a scribbled note tucked in there, and it's the whole trick. The four-digit code is 2746. Enter it, open the safe, and grab the Project Heartwood Blueprints.
Extraction is the real finish line
Here's where runs get ruined: the blueprints aren't just spare scrap you can shrug off. You've got to survive with them and extract, then hand them to Tian Wen back at base. Play it boring. Reset your route, avoid loud fights, and don't sprint through open sightlines just because you're excited. If you want to reduce the pain of repeated attempts—especially if you're rebuilding after a bad loss—some players top up gear and essentials through trusted marketplaces like RSVSR while they work through tricky quest chains like this one.