In Marathon, the Anomalous Reverbs spawn in the Central Anomaly zone on Dire Marsh, and you need to defeat 5 of them to complete the Economic Espionage 1 contract.
Economic Espionage 1 details
How to Complete Economic Espionage 1
Step 1: Accept the Contract from Traxus
Before heading into a raid, accept Economic Espionage 1 from the Traxus faction agent. This is a standard contract that grants Traxus reputation upon completion. You must first unlock Traxus by completing the “Introducing: Traxus” priority contract.
Insert into the Dire Marsh map.
From your drop point, head directly toward the Central Anomaly — this is the large glowing anomaly zone in the middle of the map. This is the only location where Anomalous Reverbs spawn.
Step 3: Track the Blue Anomaly Matter Icon (If Reverbs Don’t Spawn Immediately)
If Anomalous Reverbs aren’t visible when you arrive at the Central Anomaly:
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Open your map and look for the blue anomaly matter icon
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Follow this icon to locate active anomaly activity
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Wait near the anomaly zone — Reverbs will spawn there shortly
The blue icon indicates where anomaly-related enemies are currently active.
Step 4: Engage and Defeat 5 Anomalous Reverbs
Once you locate the Anomalous Reverbs:
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They spawn consistently in the Central Anomaly zone
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Eliminate 5 total Anomalous Reverbs in a single raid
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Watch your quest tracker — it displays “Defeat Anomalous Reverbs 0/5”
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Important: This objective has known tracking issues. If the counter doesn’t update, confirm you’re killing the correct enemy type in the anomaly zone
Step 5: Successfully Exfiltrate
After defeating all 5 Anomalous Reverbs:
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Make your way to an extraction point
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Successfully exfiltrate to complete the contract
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If you die or fail to extract, you lose all progress on this contract.
Tips for Completion
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Stay in the Anomaly Zone: Anomalous Reverbs spawn specifically in the Central Anomaly area, not elsewhere on Dire Marsh
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Single Run Requirement: All 5 kills must happen in one raid — dying or extracting resets progress to 0/5
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Expect Heavy Competition: The Anomaly zone is high-traffic; other players will contest this area for anomaly events and loot
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Watch for Anomaly Events: Random anomaly events can trigger during raids, potentially affecting enemy spawns and creating squad fights
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Verify Kill Tracking: The quest has reported bugged tracking — if progress doesn’t update, stay in the zone and continue killing.
Mistakes to Avoid
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Hunting Reverbs outside the Anomaly zone — they won’t spawn anywhere else on the map
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Extracting before completing 5 kills — you’ll lose all contract progress
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Ignoring the blue anomaly icon — if Reverbs aren’t spawning, track this icon to find active anomaly zones
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Not verifying quest tracking — confirm your kills are registering on the 0/5 objective counter
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Running the contract without a squad — the Anomaly zone is heavily contested; solo play is riskier.
Completing Economic Espionage 1 efficiently helps you grind Traxus reputation for faction upgrades and cutting-edge equipment. Focus on the Central Anomaly, stay alert for competing players, and verify your kills are tracking before extracting. Once you’ve unlocked Traxus, you’ll have access to all 5 Traxus contracts including Hostile Takeover, Operational Focus 1, Light & Shadow, and Research & Development.
