Alex’s Caves / Biome 3/6

Toxic Caves

An underground industrial disaster: irradiated Radrock, acid pools, abandoned structures and dangerous inhabitants. This biome punishes careless exploration.

Biome ID
alexscaves:toxic_caves
Where it forms
Underground Overworld

What makes this cave different

An underground industrial disaster: irradiated Radrock, acid pools, abandoned structures and dangerous inhabitants. This biome punishes careless exploration.

What to look for

Radrock uranium ore, acid pits and geothermal vents define the landscape. Severe threats include the Nucleeper, Brainiac and Tremorzilla.

How to prepare

Never leap into unknown liquids; scout from solid ground and build safe crossings. The Irradiated effect interferes with health recovery. Avoid major encounters without an escape route.

Resources and rewards

Radioactive materials, hazardous-zone resources and abandoned-structure loot.

How do I find this particular biome?

Use a matching Cave Tablet to create a Cave Codex and Cave Biome Map. The map targets a specific biome type, but discovery depends on your world and settings.

Other cave biomes

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Magnetic Caves

Neodymium, galena and materials for magnetic equipment and mechanics.

Read guide →
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Primordial Caves

Amber, limestone, Ambersol and prehistoric ecosystem resources.

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Abyssal Chasm

Deep-sea materials, ruin artefacts and unusual underwater items.

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Finding your way

Finding rare caves

Cave Tablets → Cave Biome Map

Read guide →

Original mod documentation: https://alexscaves.wiki.gg/wiki/Toxic_Caves