Hot Biome Guide
- Threat level: High
- Key resources: Sulfur, Heat-resistant materials, Deep Ore
- Landmark: thermal vents with heat-damage zones
Layout & Navigation
The Hot Biome is the game's volcanic region, entered through a deep trench at the edge of the Graveyard. Thermal vents line the basin floor, and heat-damage zones surround the vents — crossing them without a thermal suit slowly drains your health. The Power Plant finale of the current build sits at this biome's far end.
Resources & Farming
Sulfur deposits cluster around the vent mouths (harvest quickly — the heat zone lingers). Deep Ore veins run along the basin walls, and heat-resistant materials come from the mineral crust that forms on cooled lava. Route planning matters: the return trip to the surface is long, so bring a full O2 tank and a beacon chain marking the exit trench.
Dangers
Heat damage is the constant threat — watch your health bar near vents. Leviathan-class predators patrol the deeper basin, and the final boss area (Power Plant) is a no-go zone until you have the Sonic Resonator. Bring the Tadpole or a full set of thermal protection before committing to this biome.
What to bring
Standard loadout for a first pass: full O2 stack (Standard Air Tank at minimum, Portable Oxygen Generator for cave work), charged Scanner, Survival Tool, food and water for the swim, and at least one decoy if the threat rating is High or above. Drop a beacon at the entrance — the alien ocean has no compass zones, and landmarks plus beacons are the only reliable way back. If you have the Tadpole, take it: speed, cargo and a movable O2 refuge in one.
Route planning notes
Use landmarks, not coordinates, and press R3 on the map screen to check the Abyss layer — floating fast-travel points let you dive straight down toward ground-level destinations instead of swimming the whole way. Split any long trip into a scan run and a materials run; mixing them is how inventories get lost. Leviathans patrol the deep transition zones here, so learn the silhouette tells and plan your surface intervals where cover is available. Night can open safe windows: some predators patrol further out after dark, which trades visibility for room.
FAQ
Is the Hot Biome safe for new players?
Check the threat notes in the sections above: Low-rated shallows areas are fine from the first hour, while anything flagged High or needing an Adaptation should wait until you have the Tadpole, an upgraded air supply, and decoys. The Biomes index lists every region in rough difficulty order.
What should I build near the Hot Biome?
A forward base or at least a beacon chain if you farm here regularly. Power it with the cheapest stable source available (a bioreactor fed by fish and organics works anywhere), and keep a charged Repair Tool on hand — the same one that maintains your lifepod maintains base modules.
How do I survive the heat?
Build the thermal suit (or dive with high heat resistance) and avoid lingering in the vent heat zones — they drain health continuously.
What resources are unique here?
Sulfur clusters around vents and heat-resistant mineral crust are the biome's signatures; Deep Ore runs along the basin walls.