Troilite is one of the rarest and most important materials you will come across in Subnautica 2, and tracking it down requires navigating some of the game’s most dangerous territory. If you are stuck trying to progress the main story, chances are Troilite is exactly what you need.
What Is Troilite in Subnautica 2?
Troilite is an iron sulfide mineral described in-game as conductive and thermally reactive, with applications across a range of energy systems. In practical terms during Early Access, it is essential for repairing a turbine required for main story progression, with the repair alone consuming around 10 or more Troilite.
However, there are only around 8 to 12 Troilite nodes available in the world during Early Access, and they do not respawn under normal circumstances. Because of this, you should hold off using any Troilite at all until you have first built a Metal Farm to produce it passively. Many players have accidentally soft-locked their progression by spending Troilite on crafting before completing the turbine repair, so treat this as a top priority.
Where to Find Troilite
Troilite Location at a Glance
| Detail | Info |
| Biome | Root Canyon |
| Depth Required | 400 metres or deeper |
| Tool Required | Sonic Resonator |
| Recommended Vehicle | Tadpole with Depth Module Mk. 1 |
| Approximate Coordinates | -139k, 386k, -43k (may vary per world) |
| Distance from Lifepod | Roughly 1,800 to 2,000 metres east |
Troilite is found exclusively in the Root Canyon Biome. The easiest way to identify this area is by its distinctive green glow visible from a distance, produced by glowing pools on the seafloor. The biome sits past the Alien Ruins, Angel Comb, and the Turbine structure.
Step-by-Step Navigation
- From your starting Lifepod, travel east toward the Alien Ruins. Once you locate the Alien Ruins base, open your inventory with Tab and check your Signals panel to set navigation points.
- From the Alien Ruins, continue east toward the Angel Comb. You will unlock the Angel Comb waypoint after travelling roughly 400 metres east while descending to around 300 metres depth.
- From the Angel Comb, switch your heading to the northeast and descend below 400 metres. Alternatively, you can follow the roots leading east from the Angel Comb, which many players find a safer and more reliable route.
- After travelling approximately 300 metres in that direction, you will begin to see the characteristic green glow from below. Keep descending toward the seafloor with your Tadpole. The green glow is your primary landmark, so use it as your anchor point.
- Once you reach the seafloor, look for glowing green mounds that resemble clumps of scrap and industrial runoff. These are called Mineralized Clinkers, and they are the only source of Troilite in the game. Scan one with your scanner first so your PDA can track them going forward.
- Equip your Sonic Resonator and break open the Mineralized Clinkers to collect Troilite. Your Survival Multitool will not work on these clusters. Each Mineralized Clinker typically drops around 2 to 4 Troilite when broken.
Dangers in the Area
| Threat | What It Does | How to Avoid |
| Collector Leviathan (Route) | Patrols between Graveyard and Observatory Biomes, attacks even inside Tadpole | Move quickly through those sections and plan your route carefully |
| Collector Leviathan (Root Canyon) | Patrols at higher depth within the biome, attacks if alerted | Stay as close to the seafloor as possible at all times |
| Giant Squid | Attacks your Tadpole if you get too close above the pools | Park your Tadpole safely on the seafloor and swim on foot |
| Whale-type Creature (Red Zone) | One-shots both you and your Tadpole if you cross into the red zone | Stay aware of the red zone boundary and keep your distance |
| Aggressive Smaller Fauna | Roam throughout the biome and will attack on approach | Bring flares or weapons before making the trip |
What You Need Before Going
| Item | Why You Need It |
| Tadpole Submarine | Essential for reaching 400m+ depth safely and quickly |
| Tadpole Depth Module Mk. 1 | Required for consistent farming at these depths. Note: Mk. 2 is not available in Story Mode during Early Access |
| Sonic Resonator | The only tool that can break Mineralized Clinkers |
| Scanner | Scan your first Mineralized Clinker so your PDA tracks the rest |
| Flares or Weapons | Useful against the aggressive smaller fauna in the biome |
What Troilite Is Used For
Troilite feeds into several important crafting recipes across the Fabricator, Modification Station, and Processor. Keep in mind that the Mangalloy Ingot recipe is particularly significant because the turbine repair consumes a large number of Mangalloy Ingots, meaning your total Troilite demand for story progression can easily exceed 10 units across all requirements combined.
| Crafting Station | Ingredients | Output |
| Fabricator | Troilite x3, High Capacity Air Tank x1, Atacamite x3 | Ultra High Capacity Air Tank |
| Fabricator | Troilite x1, Conduit Crystal x1, Strong Acid x1, Gold Ingot x1 | Entangled Power Cell |
| Modification Station | Troilite x1, Copper Ingot x1, Strong Acid x1 | Photovoltaic Charger |
| Modification Station | Troilite x2, Dedicated Core x2, Mangalloy Ingot x2 | Tadpole Depth Module Mk. 2 |
| Processor | Troilite x1, Titanium Ingot x1, Atacamite x1 | Mangalloy Ingot |
Once you complete the turbine repair and unlock the Metal Farm, Troilite becomes farmable passively. At that point, supply becomes much less of a concern and you can freely use it for the remaining recipes.
Quick Tips Before You Go
- Do not use any Troilite until your Metal Farm is up and running.
- Park your Tadpole away from the squid before swimming down to the seafloor.
- Scan your first Mineralized Clinker immediately for PDA tracking.
- Stay close to the ground at all times and avoid ascending while inside the Root Canyon Biome.
- The green glow is your best visual cue when navigating toward the area.
- Each Mineralized Clinker drops roughly 2 to 4 Troilite, so work through every cluster you can find before leaving.
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