Arc Raiders: Complete Line in the Sand Quest Guide

The Line in the Sand quest in Arc Raiders sends you back into the dunes of Buried City to figure out what happened to a missing train and a shipment of thruster valves. On paper, it is a simple four-step objective chain, but vague map hints and the size of the zone can turn it into a time‑consuming scavenger hunt. This guide walks you through every step with clear explanations, positional tips, and survival advice, while staying spoiler‑light on story details.

Quest Overview

Line in the Sand is a narrative quest that unfolds fully inside the Buried City zone. Instead of collecting items and extracting, you mostly need to:

• Visit four specific locations in order.
• Interact with one hidden stash and one photo prompt.
• Return to your quest giver once the final step is complete.

You are free to tackle the objectives across multiple runs, so you can use a free kit or low‑risk gear and not worry about losing valuable equipment if things go badly.

Objective Flow at a Glance

Preparing for Line in the Sand

Because this quest forces you to cross Buried City from one side to the other, preparation helps you avoid needless deaths and wasted time.

Recommended Loadout Type

You can complete the mission with basic gear, but consider the following:

• Free kit or disposable loadout: Since you do not need to extract with rare loot to complete any step, you can run a low‑risk setup and repeat attempts with minimal loss if you die.
• Mid‑range weapon: Many fights will take place along open streets and dunes. A reliable assault rifle or marksman rifle makes it easier to handle enemies before they close in.
• One mobility tool: Anything that helps you reposition quickly—such as movement abilities or utility gadgets—reduces the time you spend exposed in open sand.
• Healing items: Buried City combat can escalate quickly when patrols overlap. A modest stack of healing and shielding items dramatically improves your odds of reaching all four locations in a single run.

General Survival Tips for Buried City

Buried City is designed as a dangerous open combat space, with vertical sightlines and long roads that encourage flanking. To make the trek easier:

• Use cover aggressively: Move between crushed vehicles, building corners and dunes rather than sprinting down the center of roads.
• Plan routes around known POIs: Landmarks like Warehouse, Piazza Roma, Hospital, and Marano Station help you navigate without staring at the map every few seconds.
• Avoid unnecessary fights: If a patrol can be bypassed by circling a block or cutting through an alley, do so to preserve ammo and health.
• Watch enemy density near major objectives: Points such as Hospital and large intersections often spawn more enemies. Approach slowly and scout before committing.

Step 1 – Track Down the Missing Train

The quest begins with a mystery: a train carrying thruster valves never made it to Marano Station. The game gives you a vague pointer, but the actual location you need is not the station itself.

Finding the Derailed Train

From any insertion point, navigate toward the western half of Buried City. Your target is a line of blue train cars partially buried in the sand. They are positioned along the tracks between major map landmarks—typically south of Marano Station and near structures labeled around Warehouse and Piazza‑style plazas in many player maps.

You do not need to interact with anything specific at this location. Simply walk close to the derailed cars until the game registers your presence and updates the objective. If nothing triggers, try walking the length of the wreck, especially near the more exposed carriages.

Combat and Positioning Advice

• Approach via side streets or dunes instead of running straight down the tracks; this reduces the chance of being caught in crossfire between patrols.
• Clear any enemies on higher ground first so you can inspect the wreckage without being sniped.
• Once the objective updates, do not linger—move on quickly to the next step while your resources are still intact.

Step 2 – Identify the Robbers at the Tower

After inspecting the train, your quest log shifts focus to discovering who sabotaged it. The next clue is stored in a small, easily overlooked tower.

Locating the Tower With the Hidden Stash

From the train wreck, turn east and look up toward the nearest elevated structures on the hillside. You are seeking a small square tower near a wall segment that sits a short distance above the level of the tracks.

Climb the incline or take nearby ramps and stairs to reach the tower. There should be a low railing or ledge you can mantle over to enter the interior.

Finding the Clue Inside

Once inside the tower:

• Search the corners of the interior, focusing on spots partially hidden by debris or foliage.
• Look for an interaction prompt near a stash or device tucked behind a bush or in a dark corner.
• Interacting with it reveals a key quest item, typically a business card tied to Marano Market or a similar clue pointing to the market area.

Picking up this item advances the quest and shifts the action toward the eastern section of the map.

Efficient Tower Run Tips

• Because this tower is close to the train wreck, you can usually complete both Step 1 and Step 2 in a single skirmish before enemies fully respawn.
• Mind the confined space inside the tower. If enemies follow you in, explosives can be risky; use controlled bursts and melee if necessary.
• Once you obtain the clue, check your ammo and healing before committing to the long trek east.

Step 3 – Follow the Trail to the Market Ruins

The clue you found indicates that the stolen thruster valves are connected to a merchant based in a market district. In the current timeline of Buried City, that market is now a set of ruins buried under sand and debris.

Navigating to the Market Area

Open your map and identify the Hospital POI. Your next stop, the market ruins, lie to the east of the Hospital, in the northeastern quadrant of Buried City. The area is characterized by crumbled buildings, sunken storefronts, and partially exposed walkways.

As you approach:

• Use streets that run north past Library‑like structures and then curve east to avoid long lines of sight.
• Hug the edges of buildings and move along collapsed walls to reduce exposure to patrols crossing the open plaza areas.

Triggering the Market Objective

The third step is one of the easiest mechanically. You do not need to interact with smaller objects; you just need to enter the ruined market zone itself. When you cross the invisible boundary near the center of the rubble, the quest log will automatically update to the final step.

If the quest does not progress immediately, slowly walk around the largest ruined building, especially near any remaining signage or archways that look like former market entrances.

Staying Alive in the Market Ruins

• The ruins provide plenty of cover and flanking routes. If you draw aggro, fall back into internal corridors instead of fighting in open alleys.
• Watch for enemies firing from elevated positions—broken stairwells and partial balconies can hide snipers or turrets.
• If you are running short on supplies, this is a good point to decide whether to extract and return later or push on to the finale.

Step 4 – Descend Into the Merchant’s Basement

The final step sends you to the merchant’s apartment, where the missing thruster valves were allegedly stashed. This location is a bit more hidden than the previous zones and requires you to use a vertical traversal tool inside the building.

Reaching the Apartment at the Edge of the Map

From the market ruins, aim slightly northeast toward the outer edge of the Buried City map. You are looking for a building perched near the boundary dunes—often referred to by players as a last block or end‑of‑the‑line structure.

Approach it from the uphill side if possible, using the terrain to avoid being silhouetted against the skyline. Once you reach the block of buildings, identify the one with a noticeable entryway facing toward the interior of the city.

Finding and Taking the Zipline

Inside the apartment building:

1. Enter through the front door or main entrance.
2. Look ahead for a door leading to a shaft or an opening overlooking a deep drop.
3. You should see a zipline stretching down into a basement area. Approach it and interact to ride it down.

The descent leads to a large underground room that serves as the quest’s final investigation site.

Completing the Photo Objective

Once you land in the basement:

• Turn toward the right‑hand wall from your landing point.
• Look for a cluster of boxes or crates stacked against the wall.
• Move close until you see an on‑screen prompt to take a photo or document the evidence.
• Activate the prompt to photograph the stash. This action completes the Line in the Sand quest.

At this point, you are free to either explore more of Buried City or make your way to an extraction route and return to your social hub to turn in the mission.

Bug and Progress Tracking Tips

As with many live‑service games, occasional progress hiccups can occur in quest tracking. If you run into issues, try the following:

• If you die after taking the photo and the step appears incomplete when you return to the hub, revisit the market ruins before going back to the apartment. Re‑entering the earlier objective zone can sometimes refresh the quest state.
• Double‑check that each previous step has updated properly in the log before moving on to the next; do not skip ahead based solely on map knowledge.

Rewards and Why This Quest Matters

After completing the photo objective and extracting, return to your quest‑giver NPC (often Celeste in many players’ progression) to officially turn in Line in the Sand. You will typically receive a package of components useful for builds focused on mobility and energy manipulation, such as:

• Exodus Modules
• Magnetic Accelerator components
• Magnetron parts

The exact numbers can vary with future patches and balance updates, but the general theme of the rewards is consistent: they support builds that favor speed, repositioning, and energy‑based weapon systems.

Strategic Value of the Quest

Beyond the loot, Line in the Sand serves several gameplay roles:

• Navigation training: It effectively forces you to learn Buried City’s geography—from west‑side tracks to east‑edge apartments—so later missions and contracts feel less overwhelming.
• Combat pacing practice: Because the objectives are location‑based rather than item‑based, you can focus on learning when to fight and when to disengage.
• Story context: The quest deepens your understanding of how scavengers, merchants, and Raiders interact in this region, contributing to the political and economic backdrop of the setting.

Quick Reference Checklist

If you only need a rapid refresher on the route, use this condensed checklist:

• West side — Derailed train along the tracks: walk close to update.
• Nearby — Small tower east of the wreck: climb in, search the stash, grab the market‑related clue.
• Northeast — Market ruins east of Hospital: approach the ruined buildings until the quest updates.
• Far east edge — Merchant’s apartment: enter, find the zipline, ride down, photograph the boxes in the basement.
• Extract and turn in the quest at your hub NPC for module and component rewards.

Frequently Asked Questions (FAQ)

Do I have to complete all four objectives in a single run?

No. Line in the Sand tracks progress across multiple visits to Buried City. You can safely extract after any step and return later to continue from where you left off.

Can I fail the quest if I die?

You will not permanently fail the quest by dying in the field. However, depending on when you die, some objectives may not register correctly until you revisit the location. Always confirm that your quest log updated before extracting.

Is there any reason to bring a high‑value loadout?

Mechanically, no. Since the quest is location‑driven and does not require extracting with rare loot, most players prefer a low‑risk loadout. However, bringing stronger gear can make traversal and combat faster and safer, especially if you are running the quest alongside other contracts.

Why does the game send me past Marano Station but tell me not to go there?

The story setup mentions Marano Station, but the actual evidence lies on the derailed train before it reaches the station. The quest is deliberately designed to nudge you away from obvious POIs and toward a more scenic, story‑rich wreck site.

What should I do if the final photo step doesn’t complete?

If the quest does not mark the final step as complete after taking the photo, try the following: extract, then revisit the market ruins and confirm the third step is flagged as done. After that, return to the apartment basement. In most reported cases, re‑entering the previous objective area resolves the progression issue.