You step into Buried City with the wind scraping at your helmet. A derailed car gapes like a wound, and the map suddenly feels smaller. I kept one eye on scavengers and the other on a tiny business card that would decide the rest of the run.
The west rails still smell of burnt iron. How to complete Line in the Sand in ARC Raiders
I’ve run this quest three dozen times while tracking patch notes on Steam and debate threads on Reddit; I’ll walk you through the cleanest path. You play smart, you keep the Marano Market card safe, and you leave with the answers—no guesswork. Read fast, move faster.
Street-level: Break the quest into clear checkpoints before you head out
Think of the mission as a chain of small investigations, each one revealing the next clue. If you follow these checkpoints in order, you’ll avoid backtracking and reduce the chance of losing the business card to a random firefight.
- Find out why the train never reached Marano Station
- Discover who orchestrated the robbery
- Secure the Marano Market business card and stash it
- Track the thruster valves to Market Ruins
- Search the merchant’s apartment basement to finish the quest
Where is the Line in the Sand quest located?
The quest is tied to Buried City, not the new Riven Tides map. Head west for the derailed railcar—this is your ignition point. Approach the wreck and interact with the prompt that appears; it’s the cue that starts the chain of clues.

Small tower, stubborn terminal. Climb, search, and keep the momentum
There’s a short climb east of the railcar to a metal tower with a terminal on the floor. I’ve seen players sprint past this because they expect loot—don’t. Interact with the terminal, read the prompt, and you’ll get the next lead.

How do you get the Marano Market business card?
After you finish the terminal interaction, the business card drops as an item. Pick it up and move it to a safe pocket immediately—this is one of those moments where a single mistake costs you time. I stash it before I engage anything else.

Market Ruins, an empty lot that tells a story. Follow the marks, not the loot
Go to the spot near Market Ruins marked in the map; you won’t immediately pick up the thruster valves. The quest updates once you reach the area, so treat the marker as a trigger point rather than the endpoint.

Where are the thruster valves hidden?
The valves are effectively bait: the map leads you to Market Ruins, then points you north to a merchant’s apartment. Take the zipline down into the basement; there’s a stack of boxes you need to search. Pull the right set and the quest will mark the completion.
Basement light, a room that rewards patience. Search systematically and grab what matters
The basement is cramped and noisy; use cover and clear pockets before you open boxes. When you find the boxes, search them and pick up the items. Treat the business card like evidence—if you die, reload and return to the same steps rather than improvising.

One practical tip: watch community clips on YouTube or the ARC Raiders Discord for player routes if you want visual timing. I use short clips to time when to approach the tower and when to zipline down—those seconds matter.
If you prefer a fast checklist before you drop: keep the card in a safe pocket, visit the western railcar, check the tower terminal, reach Market Ruins to trigger the update, then search the northern basement boxes. Treat each step as evidence in a case, not a loot run—your odds go up fast when you move with a purpose.
Think I missed a shortcut or a contestable spawn point—what’s your fastest clear time in Line in the Sand?