Biosteel is one of those resources you’ll constantly find yourself needing in Killing Floor 3. This is especially true once you start crafting attachments and upgrading weapons for higher-difficulty runs.
It’s tied to so many recipes that the small amounts you earn per match can quickly feel like a bottleneck. On that note, there are a few good methods to get Biosteel in Killing Floor 3.
Where To Get Biosteel in Killing Floor 3

There are two main ways to get Biosteel that you need to keep in mind. Follow these tips:
- Environmental Breakables: The most recommended method is destroying specific objects scattered across maps, particularly Electronic billboards. These always drop Biosteel when broken and can be destroyed with any weapon damage, so you don’t need special gear to farm them.
- Enemy Drops: Certain Zed types, like Sirens, Gorefasts, and Husks, can drop Biosteel when killed. These drops are random, so while it’s worth keeping an eye out during normal play, you can’t rely on this method if you’re aiming to stockpile quickly.
Biosteel is required for multiple crafting recipes and is intentionally scarce. So, learning how to maximize your Biosteel gains is extremely valuable if you would rather progress at a sensible pace rather than long grind sessions.
Best Maps for Farming Biosteel in Killing Floor 3
Many maps contain billboards, so it wouldn’t be a good idea to just list those. Instead, you should keep in mind that two maps stand out for farming runs.
City Streets
City Streets is easily the most straightforward option. Its layout makes it simple to spot the billboards you need. There are five billboards scattered around the map, and most are in open areas where you won’t get blindsided by Zeds while breaking them. Make sure to clear these before triggering the final boss; once the mission ends, you lose the chance to grab their drops.
Offices
The Offices map contains five billboards but is more vertical and maze-like compared to City Streets. It can take longer to memorize all billboard locations here, but once you know the spots, it’s equally effective for farming. The enclosed spaces also make it easier to funnel enemies if you want to farm drops from Sirens or Gorefasts at the same time.
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How To Farm Biosteel Efficiently
Weapon upgrades in Killing Floor 3 are more than just convenience. On Hell on Earth difficulty, some modifications can be the deciding factor between surviving a wave or getting overwhelmed. So make sure to focus on getting Biosteel by doing the following:
- Prioritize Billboards: To ensure you receive drops, we recommend mapping a route and destroying them before the final wave.
- Clean Up Enemy Drops Along the Way: While moving between billboard locations, eliminate the variety of Zeds to collect extra Biosteel, in addition to other assured pieces.
- Repeat Runs on Favourable Maps: City Streets is the easiest map for farming back-to-back without much downtime, as you aren’t stuck at a particular angle.
- Stay Aware of Mission Timers: Don’t trigger the boss fight or extraction until you’ve cleared all the billboards and looted the area.
In addition to Biosteel, winning a round may provide resources. You can be rewarded with Electrical Parts, Scrap Metal, Chemical Agents, Gray Matter, Bio Samples, Ichor, and more.