ARC Raiders is packed with ARC Raiders Coins exploration, scavenging, and action-packed missions that send you across multiple zones. One of these is What We Left Behind - a quest that feels a bit old-school with its minimal guidance and cryptic objectives. But that's part of the charm. The challenge of piecing together clues and traversing dangerous terrain makes every discovery feel earned.

If you've been working your way through the game's early content, you'll eventually unlock this quest after completing a few prerequisites. This guide will walk you step-by-step through everything you need to know - from how to unlock the mission to where to find all three objectives. You'll also learn what rewards you'll get once you finish.

How to Unlock "What We Left Behind"

Before you can start What We Left Behind, you'll need to complete two earlier quests: Dormant Barons and Greasing Her Palms. Neither of these is particularly difficult, though the Dormant Barons quest can be dangerous if you're not cautious - the enemies and explosive loot in that area can catch you off guard if you're not paying attention.

Once both quests are finished, What We Left Behind will become available. After unlocking it, you'll be treated to a short cutscene offering some narrative context and hints about your next mission. When the scene wraps up, accept the quest, gear up, and prepare to head topside. Things are about to get interesting.

Quest Overview

Unlike some missions that require you to extract specific ARCR Items, What We Left Behind focuses on finding and investigating three different areas across the world map. You won't need to bring anything back, which gives you a bit more freedom to take risks and explore aggressively.

Here's what you'll be doing:

Explore three distinct areas across the Dam Battlegrounds, Spaceport, and Buried City.

Collect important notes or data in each zone.

Return to Tian Wen to complete the quest and claim your rewards.

Location 1: Dam Battlegrounds - South Swamp Outpost

Your first stop is the Dam Battlegrounds, specifically the South Swamp Outpost. When you arrive, make your way to the western side of the map. This is not only where your objective is located, but it's also one of the best areas in the region for consistent loot.

Look for a large main building that sits directly beneath the "Dam Battlegrounds" lettering on your map. Head inside and keep an eye out for a set of notes placed on a table. Interact with them to complete this objective.

While you're here, don't rush off too quickly - the area often spawns good loot and materials. Just stay alert for enemy patrols that can catch you by surprise while you're scavenging.

Location 2: Spaceport - Bilguun's Hideout

Next, it's time to move on to the Spaceport. This one can be a little confusing because Bilguun's Hideout isn't marked as a named location on your map. You'll be searching somewhat blindly, but here's how to find it.

Head toward the eastern side of the Container Storage area. You should be looking for a Raider Camp-style structure that's built against the outer wall. Follow the wall until you find a large encampment with scaffolding or barricades - that's your spot.

Climb the ladder to enter the hideout. Inside, you'll discover another set of notes similar to the ones in the Dam Battlegrounds. Grab them to complete the second part of the quest.

Be cautious while navigating the Spaceport - enemies here often patrol in groups, and getting ambushed while climbing can be dangerous. A stealthy approach or using ranged weapons to thin out guards before entering can make things smoother.

Location 3: Buried City - Raider Camp

The final objective brings you to the Buried City, one of the more treacherous areas in ARC Raiders. This section tends to have a heavy ARC enemy presence, so come prepared for a fight.

Your goal is located in or around the parking garage. Enter the structure and move toward the second level. From there, make your way to the southern side of the garage - you'll find a door leading to a zipline.

Take the zipline down to the lower area. You'll spot several containers and loot crates nearby - some locked, some open. Your quest item will be among them.

Be extra careful here. A Bombadier enemy can spawn in this location, and if you're unprepared, it can easily overwhelm you with its explosives. Clear the area methodically before looting, and consider using cover or explosives of your own if things get intense.

Completing the Quest and Claiming Rewards

After you've gathered all three sets of notes, the hard part is over. You can complete the objectives in any order, so if you've finished them all, return to Tian Wen to turn in your findings.

Hand over the data to receive your rewards and unlock new missions. The completion also advances your storyline progress, opening up further opportunities to ARCR Coins for sale explore and upgrade your loadout.