In Helldivers 2, samples are one of the most valuable resources you can collect, especially if you want to upgrade your ship modules or unlock high-tier gear. While samples can be found across the surface of different planets, underground caves remain one of the most consistent farming spots. These areas often hide clusters of samples that can give you a big boost in just one run, but getting in and out safely requires some strategy.

Why Underground Caves Are Worth Farming

Caves usually spawn a higher density of samples compared to the surface. You’ll often find multiple deposits in a single tunnel system, and they’re usually closer together. That makes them excellent targets if you’re aiming to stockpile resources for ship upgrades. However, the danger level underground is much higher. The tight spaces make it harder to dodge attacks, and enemies like bugs and automatons tend to swarm aggressively in these environments.

Preparing for a Cave Run

Before you even step into a cave, make sure you have the right loadout. Light armor is risky underground since mobility doesn’t help much in tight corridors, so medium armor with strong defensive stats works better. Weapons with good stopping power, like shotguns or explosives, are excellent for clearing out groups. It’s also a good idea to bring stratagems that help with crowd control, since fights underground tend to be chaotic and close-range.

Best Strategies for Farming Samples Underground

1. Stick to the edges: Many caves have side paths where samples spawn. Hugging the walls often reveals hidden clusters.

2. Clear before collecting: Don’t rush straight to a glowing sample node. Secure the area first to avoid being overrun while picking it up.

3. Use stratagems wisely: Orbital strikes and sentries can help create safe zones. Place them near choke points before gathering.

4. Stay together: Splitting up underground is one of the fastest ways to get wiped. A squad should always move as one.

5. Extract quickly: Once you’ve collected enough samples, don’t linger too long. The longer you stay, the more enemies spawn.

Efficient Farming Routes

On most planets, caves are marked clearly on your map once you scout the area. Plan a route that chains several caves together. This way, you maximize your sample intake without wasting time wandering around. Some missions naturally spawn multiple caves close to each other, making them ideal for farming runs.

Why Samples Matter

Samples are tied directly to long-term progression. Upgrading your ship allows access to better stratagems, stronger weapons, and more efficient tools. While you can focus on surface farming, underground caves will often cut down your grind time significantly. For players looking to advance quickly, it’s smart to combine cave farming with mission objectives so no run feels wasted. 

Farming samples in underground caves is risky, but the rewards are well worth it. With the right preparation and squad coordination, you can walk out with enough resources to speed up your progression. Whether you’re saving up for ship upgrades or trying to balance resources alongside other priorities like when you choose to buy Helldivers 2 medals or buy Helldivers 2 items, cave runs can give you the edge you need.