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Marathon Return on Investment 2 Guide

Marathon Return on Investment 2 Guide – Explosive Damage Contract

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Marathon Contract Guide: How to Complete Return on Investment 2

 

Runners! Contracts are the backbone of progression in Marathon, and few are as explosive—literally—as the Return on Investment 2 contract. Part of the Traxus priority contract series, this mission tasks you with breaking into a secured building, stealing explosive supplies, and then using them to deal serious damage. Here’s everything you need to know to get it done.

 

By the BuyCarry News Team | March 28, 2026

💣 Marathon Return on Investment 2 – Explosive Damage Contract Guide

🎯 The Objective: Explosive Damage

Return on Investment 2 has two main steps:

  1. Acquire Explosive Supplies – Break into a secured building in Maintenance on Dire Marsh and loot the explosives.
  2. Deal 750 Explosive Damage – Use grenades or other explosives to deal damage to UESC robots or enemy Runners.

The good news? Progress carries over between runs. If you don’t hit 750 damage in one match, your progress saves for the next.


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📦 Step 1: Acquire Explosive Supplies

Head to the southwestern side of Maintenance on Dire Marsh. Look for a small white and red building connected to an elevated catwalk. You’ll know you’re in the right spot when you see green lasers covering the windows.

Those lasers aren’t just for show. They’re security sensors. Trip them, and an alarm will trigger, sealing you inside with live claymores on the floor—a recipe for disaster.

The Safe Way In: Instead of barging in, peek through the windows until you spot security breaker boxes on the walls. There are two:

  • One on the first floor
  • One on the second floor

Each has a distinct red light. Shoot both boxes to disable the security system. Now you can climb inside without triggering the alarm. Just watch your step—the claymores are still there.

Once inside, head to the second floor and loot the yellow and orange explosives container. You’ll grab a set of grenades to use for the next step.


💥 Step 2: Deal 750 Explosive Damage

Now it’s time to put those explosives to work. You can target enemy Runners, but the most reliable method is hunting UESC robots. They’re predictable, plentiful, and often found in groups.

Best Opportunities for Grouped UESC:

  • Guarded Exfils – Multiple robots spawn to defend extraction points
  • Container Hacks – Hack events often draw UESC dropships
  • Proximity Sensors – Found in Maintenance; triggering them spawns robots

You’re not limited to the grenades from the supply box. Any explosive equipment you bring or find counts toward the total. If you don’t hit 750 in one run, the progress carries over.


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🏆 Rewards for Completion

Finishing Return on Investment 2 is well worth the effort. You’ll receive:

  • 420 Traxus Reputation Points
  • Additional rewards tied to the priority contract chain

These points help unlock higher‑tier gear and progress toward endgame content.


💬 BuyCarry’s Take: Efficient Contract Farming

At BuyCarry, we appreciate contracts like Return on Investment 2. They’re clear, achievable, and reward smart play over brute force. The security breaker mechanic is a nice touch—it rewards observation rather than just running in guns blazing.

That said, we know that not everyone has hours to spend hunting UESC spawns or dodging claymores. Contract grinding can eat up time that could be spent on higher‑level objectives like vault runs or boss fights.

That’s where we come in. Whether you need help clearing contracts, farming reputation, or securing exfils, our team handles the grind so you can focus on the fun.


🔥 Skip the grind – let our boost team complete Return on Investment 2 for you!

🎮 Our Marathon Services

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❓ Frequently Asked Questions

  • Q: Where is the explosive supplies building located?
    A: Southwestern side of Maintenance on Dire Marsh. Look for a small white and red building with green laser security.
  • Q: How do I disable the security lasers?
    A: Peek through windows and shoot the security breaker boxes (one on first floor, one on second) until their red lights go out.
  • Q: Do I have to complete this in one run?
    A: No. Explosive damage progress carries over between matches.
  • Q: What’s the easiest way to deal explosive damage?
    A: Target UESC robots, especially during events like Guarded Exfils, Container Hacks, or Proximity Sensor activations.
  • Q: What’s the reward for completing this contract?
    A: 420 Traxus reputation points plus additional rewards from the priority contract chain.
  • Q: Can BuyCarry help me complete contracts faster?
    A: Absolutely. We offer contract completion services, reputation farming, and full carries so you can skip the grind.