Where to Get Unstable Biomass in Marathon

If you’re playing Marathon and trying to farm Unstable Biomass, you’re likely starting to dig into crafting, upgrades, or higher-tier progression systems. This material is one of the more important mid-game resources, but it can be a bit confusing to locate consistently if you don’t know where to look.

Best Locations to Farm Unstable Biomass in Marathon

The most reliable way to get Unstable Biomass in Marathon is by targeting infested or bio-contaminated regions. These areas usually feature:

• Mutated enemy types

• Organic growths or environmental hazards

• Higher density of PvE encounters

Focus on eliminating biomass-based enemies — anything that looks mutated, infected, or non-mechanical tends to have a higher drop rate.

You can also find Unstable Biomass through:

• Loot containers in contaminated zones

• Event areas with increased enemy spawns

• Extraction runs where you prioritize PvE over PvP

If you’re consistently running the right zones and prioritizing organic enemy encounters, you’ll start building up a solid stock of Unstable Biomass for crafting and upgrades pretty quickly.

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