Subnautica 2 Guide: How to Find and Farm Celestine
Hearing the metal of your Tadpole groan and buckle under extreme water pressure is terrifying.
If you want to survive the late-game zones, your baseline submarine simply won't cut it. Your Tadpole caps out at a depth of 250 meters. If you push past that, the hull crushes like an empty soda can. To craft the depth module and upgrade your tools, you absolutely need Celestine. This blue-silver ore doesn't spawn anywhere near your cozy Lifepod. You have to push deep into the darkest corners of the ocean. I mapped out exactly where to find it without losing your sub in the process.
Prepping for the Alien Biome
You can’t just swim to this ore. It spawns roughly 1,200 to 1,300 meters east of your starting position, sitting directly inside the alien biome.
To get there, you have to cross a massive trench guarded by a Collector Leviathan. Do not attempt this swim by hand. Bring your Tadpole. Even if you get grabbed by the leviathan, the vehicle will absorb the damage and keep you from instantly dying. Ensure you fully repair the hull before you leave the shallows.
You should also bring a Sonic Resonator, which you’ll need to blast the massive ore boulders apart. If you don't have one yet, refer to my Subnautica 2 Lead Location guide to track down the materials.
The Safest Celestine Route
The game directs you to this area naturally during the "Investigate the Tadpole Pens" mission. Once you use the keycode in the pens and get the Alien Ruins waypoint, you are exactly where you need to be.
The Northwest Cliff Path
Instead of fighting the hostile Needler fish south of the ruins, I use a much safer farming route. Start at the Alien Ruins marker in your Tadpole and drive exactly 180 meters northeast.
Drop down until your depth gauge hits exactly 250 meters. Do not go deeper, or your sub takes damage. Look back toward the rock wall. You’ll spot your first Celestine deposit sitting right next to an underwater current. From here, follow the cliff edge heading west-northwest. You will find a long line of deposits spread across the wall. Keep moving west until you spot a cave entrance, and head inside to find two more massive deposits. This specific route yields seven large Celestine nodes with zero aggressive fish bothering you.
Since your Tadpole is parked right at the crush depth limit, you’ll have to hop out, swim down manually to blast the nodes with your Resonator, and quickly swim back up for air.
Processing Strontium and Upgrades
Grabbing the raw Celestine is only step one. To actually use it for advanced upgrades, you need to run it through a Processor back at your base.
Drop two pieces of raw Celestine into the machine, and after 30 seconds, it spits out one piece of Strontium.
Here is exactly what you are risking your life to craft.
If you get tired of blindly searching the cliffs, consider setting up a small scanning outpost right inside the alien biome. I detail exactly how to build one in my Subnautica 2 Creature Enamel guide.
Still struggling to survive on Proteus? Check out my complete Subnautica 2 Guide Hub for base building tips, resource maps, and more.
