Troilite is the rarest resource in Subnautica 2 right now, and it sits behind one of the most dangerous runs in the game. You need it to craft Mangalloy Ingots, fix the Alien Power Plant, and build the Photovoltaic Charger upgrade. Miss the soft-lock warning and you could process every last piece before realizing you need ten of them for story progression. This guide covers exactly where to find it, how to get there safely, and what to craft with it.
What is Troilite and why do you need it?
Troilite is an iron sulfide mineral that is conductive and thermally reactive, with applications across energy systems. In practical terms, it is a late-game crafting material tied to some of the most important recipes in the current early access build.
The reason players run into trouble is that Troilite nodes are limited in the world, and the Metal Farm structure, which can duplicate metals, requires you to seed it with one piece of the metal you want to produce. Process every Troilite you find into Mangalloy Ingots before building a Metal Farm, and you have no way to keep producing it without waiting on resource respawns, which as of the current build are not confirmed to work reliably.
Keep at least one Troilite in reserve before processing any into Mangalloy Ingots. You need it to seed a Metal Farm for later bulk production. Multiple players have reported soft-locking themselves by converting all available Troilite too early.
Where to find Troilite in Subnautica 2
Troilite only spawns in one biome: the Root Canyon. The ore does not appear as loose rocks or standard mineral deposits. Instead, it forms large clusters called Mineralized Clinker, which glow green and can be spotted from a distance even in the dark.
Subnautica 2 Guide: How to Get Troilite
How to reach the Root Canyon Biome
From your starting Lifepod, travel approximately 2000 meters east and descend to a depth of around 400 meters. You will see the green glow of the area before you arrive, which makes navigation easier in the dark depths.
The area sits at roughly bearing 75 degrees on the compass, about 870 meters from the Alien Ruins Research Base, near a glowing green pool surrounded by Metal Farm structures. The route via the Angel Comb is worth knowing:
- Head east from the Alien Ruins Research Base and drop off the edge, descending until you spot the large purple tube.
- Follow the purple tube toward the Angel Comb beneath the Alien Power Plant.
- From the Angel Comb, continue northeast following another purple tube down a ravine until you reach the green-glowing pool area with pillar-like alien structures around the perimeter.
The Root Canyon area also contains the Metal Farm blueprint (scan the pillar structures), the Feedback Resonator, and Axum Bacterial Culture. Grab all of them while you are there.
What vehicle and tools do you need?
The depth of the Root Canyon makes preparation non-negotiable. The area sits at or beyond the 450-meter depth limit of the Tadpole submarine even with the Depth Module Mk. 1 equipped, meaning you will need to swim the final stretch yourself. Bring healing items and a Repair Tool for your Tadpole in case of leviathan damage.
Critically, Mineralized Clinker cannot be broken with the Survival Multitool. You must use the Sonic Resonator to harvest Troilite from these clusters. If you have not built one yet, check out our guide on how to get the Flashlight and other early tools before heading this deep.
How to avoid the Collector Leviathan
The path to Root Canyon passes through some of the most hostile territory in the game. Two separate Collector Leviathan encounters can ruin a farming run if you are not careful.
- The first Collector Leviathan patrols between the Graveyard and Observatory Biomes on the route to Root Canyon. It will attack you even while you are inside the Tadpole.
- A second Collector Leviathan patrols at a higher depth above the Root Canyon Biome itself. Ascending too high while mining will alert it.
The recommended approach is to hook right from the observatory to avoid the leviathan patrolling the large expanse to the east. Stay low and hug the terrain when you reach the Root Canyon area to avoid triggering the second creature.
The Tadpole Depth Module Mk. 2 requires 2 Troilite to craft, so plan your farming run to collect enough for both story progression and the upgrade. Crafting it also needs 2 Dedicated Cores and 2 Mangalloy Ingots at the Modification Station.
What can you craft with Troilite?
Troilite feeds into several recipes across different crafting stations. Here is a full breakdown:
The Mangalloy Ingot recipe via the Processor is the one that trips players up. You need ten Mangalloy Ingots to repair the Alien Power Plant, and each one costs a Troilite. That is a lot of material from a biome with limited nodes. For recipes that require other processed materials, our guides on finding Necrolei Cysts and crafting Strong Acid and making Titanium Ingots cover the full process.
Troilite's in-game description classifies it as an iron sulfide mineral. The game describes it as conductive and thermally reactive, which explains its role in energy-related recipes like the Entangled Power Cell and Photovoltaic Charger.
How to farm Troilite without running out
The safest long-term strategy is to build a Metal Farm and seed it with one piece of Troilite. Metal Farms require you to insert one unit of the target metal to begin production, so the order of operations matters:
- Collect Troilite from Root Canyon using the Sonic Resonator.
- Scan the pillar structures in the same area to unlock the Metal Farm blueprint.
- Build a Metal Farm at your base.
- Insert one Troilite into the Metal Farm to start producing more.
- Use your remaining Troilite for crafting recipes.
This eliminates the risk of running dry mid-progression. For players still building out their resource base, the Subnautica 2 guides collection has everything you need to stay stocked on materials from copper to quartz before attempting the Root Canyon run.