What We Left Behind ARC Raiders: The Ultimate Tactical Scavenging & Survival Guide

Quick Takeaways / At-A-Glance

• What is "What We Left Behind"? In ARC Raiders, "What We Left Behind" refers to the high-value Golden Age relics, industrial blueprints, and historical tech leftovers abandoned on the surface of Speranza after humanity fled underground to escape the ARC machine invasion.
• Primary Objective: Scavenge these high-tier quest and crafting items from dangerous, machine-patrolled ruins and extract safely to trade with vendors in the underground colony of Speranza.
• Key Threat Vectors: Hostile ARC units (Drones, Harvesters, and Hunters) and rival Raiders seeking the exact same loot.
• High-Yield Zones: The Buried City, the Rustyard, and the abandoned Spaceport terminal.

1. Complete Overview & Search Intent

In Embark Studios' highly anticipated PvPvE extraction shooter, ARC Raiders, players are thrust into the boots of a Raider—a rugged scavenger descending from the underground sanctuary of Speranza to the devastated surface of Earth. The core driving force of this gameplay loop is encapsulated by the phrase "What We Left Behind." — the remnants of our golden civilization."**

When players search for "what we left behind arc raiders," they are looking for two things: the deep narrative lore behind the abandoned ruins of Speranza, and the practical, hard-nosed tactical strategies required to find, secure, and extract these high-value "Leftovers" (the formal in-game classification for historical, industrial, and military loot).

This guide serves as your masterclass manual. Whether you are hunting for Old World electronics to upgrade your workshop, searching for rare medical supplies to level up your trader standing with Theresa, or trying to survive a run against ruthless machine AI and opportunistic rival players, this article provides the precise data, maps, and loadouts you need to succeed.

2. Deep Dive Mechanics & Technical Specs

Scavenging the surface is not as simple as running up to a container and pressing an interaction key. Embark Studios has built a highly tactile, physical world where every action has consequences. Understanding the mechanical underpinnings of scavenging is the difference between a successful extraction and losing your entire loadout.

Loot Weight and Stamina Penalties

Every piece of "Leftover" tech you shove into your tactical backpack has a physical weight value.

• Light Items (0.1 - 1.0 kg): Microchips, old-world currency, medical ampoules. These have negligible impact on your movement speed and stamina regeneration.
• Medium Items (1.1 - 5.0 kg): Weapon parts, intact circuit boards, ration packs. These slightly increase your stamina consumption rate when sprinting.
• Heavy Items (5.1+ kg): Industrial batteries, engine blocks, pristine machine cores. Carrying these will significantly reduce your maximum sprint speed, increase your footstep audio profile, and slow down your stamina recovery.

Audio Footprint and Container Tiers

Searching containers makes noise. The rarer the container, the louder and longer the search interaction:

• Civilian Duffel Bags: Fast search time (2 seconds), low audio footprint (audible within 5 meters).
• Military Weapon Crates: Medium search time (4 seconds), moderate audio footprint (audible within 12 meters).
• Secure Tech Safes / Industrial Vaults: Slow search time (8-10 seconds), high audio footprint (audible up to 25 meters). Opening these often triggers localized alarms that alert nearby ARC units and rival Raiders.

3. Comprehensive Data Comparison Table

To optimize your looting runs, you must know what items are worth the space in your inventory grid. Below is a breakdown of the primary "What We Left Behind" loot tiers, their spawn probabilities, average market value in Speranza Credits, and weight-to-value ratios.

4. Step-by-Step Practical Walkthrough: A Perfect Scavenger Run

To successfully extract with high-tier "What We Left Behind" items, follow this battle-tested operational plan during your next drop.

Phase 1: The Pre-Drop Loadout

Do not enter the surface naked, but do not risk your absolute best gear unless you are running with a coordinated three-man squad.

1. Weaponry: Equip a silenced mid-range weapon (like the companion assault rifle with a suppressor attachment) to clear wandering ARC drones without alerting the entire sector.
2. Utility: Always carry at least two EMP grenades. ARC machines are highly susceptible to electronic disruption.
3. Backpack Selection: Choose a medium-capacity backpack. A large backpack makes your silhouette bigger and encourages over-looting, which leads to fatal stamina depletion.

Phase 2: Infiltration and Vector Analysis

Upon spawning on the surface, do not immediately rush the nearest point of interest.

1. Take 30 seconds to crouch in cover and listen. Listen for gunfire, jetpack boosts, or the metallic clanging of patrolling ARC units.
2. Identify your nearest extraction point on your tactical map overlay. Plan a looting route that moves in a crescent shape toward that extraction zone, rather than a straight line that forces you to backtrack.

Phase 3: High-Value Scavenging

When you enter a loot zone (e.g., the Sunken Mall):

1. Establish an escape route before you start looting. Look for open elevator shafts, broken windows, or scaffolding.
2. Clear any active ARC Drones in the immediate vicinity using silent melee takedowns or suppressed headshots.
3. Search containers systematically. Prioritize high-value-to-weight ratio items (Microprocessors, Medical Kits) over bulky industrial parts unless you have a specific hideout upgrade requirement.

Phase 4: The Extraction Loop

Extractions in ARC Raiders are tense, loud affairs.

1. Approach the extraction beacon cautiously. Throw a decoy grenade in the opposite direction to draw away any wandering ARC patrols.
2. Call the extraction pod. This will alert nearby players and spawn a localized wave of ARC interceptors.
3. Do not stand directly on the extraction pad. Find a defilade position nearby with a clear line of sight to the beacon, and only move to board the pod in the final 3 seconds of the countdown.

5. Map Locations & Threat Mitigation

Speranza's surface is divided into several distinct biomes, each containing unique remnants of what humanity left behind, along with specialized threats.

+-------------------------------------------------------------+
|                       THE SPACEPORT                         |
|                  (High Tier Tech / Sniper Threat)           |
+-------------------------------------------------------------+
                               | 
                               | (Mountain Pass)
                               | 
+----------------------+       v       +----------------------+
|     THE RUSTYARD     | ------------> |   THE BURIED CITY    |
| (Industrial/Scrap)   | <------------ | (Residential/Caches) |
+----------------------+               +----------------------+
                               ^
                               |
                       [SPERANZA ELEVATOR]

1. The Buried City (Residential & Commercial Ruins)

• What you'll find: Ancient luxury goods, old-world electronics, medical supplies.
• Environmental Hazards: Tight, claustrophobic corridors, verticality that allows enemy Raiders to drop down on you from above.
• ARC Presence: High density of Scramblers (small, fast machines that disrupt your HUD and radar mapping).
• Mitigation Strategy: Stick to the ground floor shadows. Avoid crossing open streets. Use your scanner frequently to detect heat signatures through thin drywall.

2. The Rustyard (Industrial Sector)

• What you'll find: Machine parts, heavy-duty batteries, weapon upgrade components.
• Environmental Hazards: Open sightlines with minimal cover, hazardous chemical spills that deal damage over time.
• ARC Presence: Patrolling Harvesters (massive multi-legged tanks that actively mine resources and will engage you with heavy artillery if spotted).
• Mitigation Strategy: Keep a distance of at least 75 meters from Harvesters. If targeted, use smoke grenades to break line-of-sight and escape into the industrial warehouses.

3. The Spaceport (High-Tech Laboratories)

• What you'll find: Pristine ARC cores, experimental weaponry blueprints, gold-tier tech components.
• Environmental Hazards: Long, barren runways watched over by AI sniper towers.
• ARC Presence: Hunters — lethal, humanoid machines designed specifically to track down and eliminate human Raiders.
• Mitigation Strategy: Never cross the runways during daylight hours. Use the underground service tunnels to navigate between hangars. Work as a squad to flank and disable Hunters using coordinated EMP strikes.

6. Pro Survival Tips & Stash Strategy

To truly excel in the post-apocalyptic economy of ARC Raiders, you must manage your stash with extreme discipline. Here are four pro-level tips from our veteran playtesters:

1. The "One-for-One" Rule: Never return to your stash with more than two heavy industrial items. If you find a third, evaluate its utility. If it does not immediately serve a pending upgrade for your Speranza hideout, discard it for lighter, high-value electronics.
2. Level Up Theresa First: Focus your early-game scavenging runs on medical supplies. Turning these over to Theresa (the colony's chief medical officer) unlocks high-tier healing items and stims that dramatically increase your survivability during solo drops.
3. Utilize Safe Pockets: Always place your rarest keys, access cards, and microprocessors into your secure container slots. Even if you get wiped by a rival squad or a surprise ARC ambush, you will retain these vital progression items.
4. Sound Cues Are Wallhacks: Embark Studios uses advanced spatial audio. Turn off in-game music and boost your treble frequencies in your audio settings. You can hear the distinct hydraulic hiss of an ARC Hunter's joints from up to 40 meters away, giving you ample time to hide or set up an ambush.

7. Frequently Asked Questions (FAQ)

Q1: What exactly is "What We Left Behind" in the context of ARC Raiders lore?

In the lore of ARC Raiders, "What We Left Behind" refers to the material wealth, advanced technology, and cultural artifacts of 21st-century humanity. When the ARC (a mysterious, mechanized alien threat) descended from orbit, humanity was forced to flee into subterranean bunkers, abandoning their cities, factories, and spaceports. Raiders venture back to the surface to reclaim this lost heritage to keep the underground colony of Speranza alive.

Q2: Can I play solo and still extract with high-tier leftovers?

Yes, playing solo is highly viable, but it requires a radically different playstyle. As a solo scavenger, your primary weapon is stealth. Avoid engaging large ARC squads or player trios. Stick to the edges of major points of interest, use suppressed weapons, and focus on looting high-value, low-weight items that allow you to remain fast and quiet.

Q3: How do I open locked military vaults on the surface?

Locked vaults require specific keycards or hacking tools that can be found on elite ARC units (such as downed Hunters) or purchased from Knox in the Speranza bazaar. Opening a vault triggers a loud alarm that alerts all players and machines in a 100-meter radius, so always ensure your squad is ready to defend the area during the unlock sequence.

Q4: Does loot respawn during a single match?

No, loot does not respawn during a match. Once a container is looted, it remains empty for the duration of that raid. This makes fast pathfinding and maps knowledge incredibly important; if you arrive at a major point of interest and find open doors and empty crates, it is a clear sign that a rival squad is nearby and you should proceed with extreme caution.

8. Final Verdict & Raider Checklist

Success in ARC Raiders is not measured by how many machines you destroy or how many rival players you defeat; it is measured solely by what you manage to bring back to the safety of Speranza. By mastering the art of scavenging "What We Left Behind," you will rapidly level up your traders, upgrade your personal hideout, and secure the gear necessary to tackle the game's most challenging endgame content.

Before you pull the lever on the drop elevator, run through this quick checklist:

• Silenced Weapon Equipped? (Crucial for avoiding unwanted attention)
• At Least 2 EMP Grenades in Inventory? (Your primary defense against mechanical threats)
• Inventory Grid Clear? (Ensure you have at least 65% free space before dropping)
• Extraction Plan Formulated? (Identify your primary and secondary extraction points on the map)
• Sound Settings Optimized? (Spatial audio turned up to detect footsteps and machine mechanical whines)