You sprint into Maintenance with the HUD flickering and a Traxus rep waiting on the other end of the contract. I watched the locked doorway for a beat, weighing a noisy approach against a patient hack. You either get the explosives and finish the job, or you turn back empty-handed.
Most Maintenance POIs on Marathon cluster their service blocks in white and pink on the southern side. That cluster is where the Return on Investment 2 contract begins and ends: grab the explosive supplies, then deal 750 explosive damage to UESC or Runners to finish the job.
You’re doing two things here: find the container in western Maintenance and then use its contents to deal the damage requirement. I’ll show the precise room, the shortcut to get inside, and the easiest targets to hit so you don’t waste time or ammo.
- Acquire explosive supplies from western Maintenance
- Deal at least 750 explosive damage to UESC troops or Runners
Where are the explosive supplies in western Maintenance?
Head to the southern edge of the Maintenance POI where the white-and-pink buildings are grouped. The container sits inside a small service structure—exactly the one in the screenshot below.
The building will be locked when you arrive. Shoot the boxes surrounding the doorway until the barrier drops—the hatch gives way like an ancient safe. Step inside, take the ladder up to the first floor, and follow the quest marker to the supplies. Loot the crate and you’ve cleared task one for Traxus.
Those Moyens I/O screenshots mirror my run on PC and console; the marker logic and container position are identical whether you play on Steam, Xbox, or PlayStation. Picking up the supplies feels reliably quick—almost like finding a forgotten bill in a jacket pocket.
How do I deal explosive damage to UESC or Runners for Return on Investment 2?
Once you’ve looted the explosives, the contract needs 750 explosive damage applied to UESC troops or Runners. If you prefer predictable targets, aim for UESC patrols: they group up, take splash hits well, and are safer than hunting high-skill PvP Runners.
Use the container to resupply sticky explosives or throwable ordnance. Stand behind cover, lob a few into clusters, and track the damage counter. If you’re attempting this in a busy lobby, prioritize UESC soldiers; they’re the path of least resistance to finish the job and boost your Traxus standing.
Images in this guide come from Bungie, remixed by Moyens I/O for clarity; I ran the route twice to confirm the exact ladder and room. Want to grind Traxus rep faster—risking Runners for speed—or keep it safe with UESC mobs and a measured approach?