How To Unlock the Modification Station in Subnautica 2

Jessica Turner

Jun 24, 2026

The Modification Station is an advanced interior base facility that allows you to craft upgrades that cannot be made in the standard Fabricator. This important progression station unlocks advanced vehicle modules and tool modifications. The blueprint itself is easy to unlock, but reaching it can be challenging. You only need one scan, unlike some blueprints that require multiple fragments. After unlocking the blueprint, you'll still need Celestine to build the station. Modification Station can create enhanced versions of personal equipment, including Improved Oxygen Tanks, Upgraded Fins, and other survival gear upgrades. Let’s learn how to unlock Modification Station in Subnautica 2.

How Modification Station Works

The Modification Station in Subnautica 2 is an interior base facility built inside your Seabase. You unlock it by scanning fragments and then place it using the Habitat Builder. Think of it as the upgrade machine, not a standard crafting station. The Modification Station fragments are located in places like abandoned bases, Alien Ruins, and Research Outposts. Once unlocked, you build it with Titanium, Copper, and Celestine. Looking to get a Subnautica 2 game key, LootBar offers the best and most budget-friendly deal.

This station is basically used to upgrade existing items.

Take an existing item.
Upgrade it into a better version.
Craft upgrade modules for vehicles like the Tadpole.

Use the Modification Station in Subnautica 2 to do the following things.

Upgrade oxygen tanks (better breathing capacity).
Improve fins and movement gear.
Craft high-tier tool upgrades.
Create vehicle upgrade modules (like Tadpole upgrades).
Unlock deeper progression gear that the Fabricator cannot make.

Placing the Modification Station inside the seabed lets you unlock Depth Modules, Engine Efficiency Modules, Strike Armor, Cavitation Muffler, Photovoltaic Charger, Bioscanner, and Feedback Resonator.

How to unlock the Modification Station

To unlock the Modification Station blueprint in Subnautica 2, you don’t craft it directly at the start. Before heading out, don’t forget to bring the Scanner. The blueprint is found in the Alien Ruins area, not near the starting Lifepod. This location is 1,200-1,400 meters east of your Lifepod inside the large alien tower structure. However, you have to go 120-150 meters deep to find this exploration zone, so bring decent oxygen and mobility gear. Go all the way east from the Lifepod to large alien tower. Make your way inside the Alien Ruins and find a damaged base structure called the Research Outpost.

Enter through broken tunnels or side openings.
Explore interior rooms carefully (there are hazards and tight corridors).
The Modification Station is placed as a scannable intact machine inside the base.

You can also find the Modification Station inside the Cicada Wreck (EVA Prep) near the Karakorum Power Plant. Research Outpost is the earlier location, so follow this route. Once you find the station, equip your Scanner tool. You need to walk up to the Modification Station and perform a scan. You only need 1 scan to unlock the blueprint, allowing the PDA to add it to your crafting list.

What Items to Bring Before Heading Out

As mentioned above, the Modification Station blueprint is found in the Alien Ruins Research Outpost. This location is far and dangerous, so preparation matters a lot. Here are the things to bring before you go out to farm the blueprint.

Scanner: Needed to scan the Modification Station and unlock the blueprint.
Oxygen Protection: Helps you survive long base exploration and deep corridors.
Wakemaker: Helps cover a 1.3 km ocean distance quickly.
Sonic Resonator: Required to harvest Celestine nodes.
Celestine nodes: Tedpole can take damage from creature strikes.

Make sure to have enough inventory space to add 5x Celestine. 2x Celestine go into the station itself, while the other covers the Depth Module Mk. 1.

How To Farm Celestine

Celestine is one of the required materials to craft Modification Station in Subnautica 2. This resource cannot be found anywhere near the Lifepod. Instead, you can only find it inside the Alien Ruins biome. This is a blue-silver jagged crystal cluster attached to rock walls and cliff edges. Sonic Resonator is the only item used to harvest Celestine from the walls or edges. Keep in mind that this material is easy to confuse with other minerals at a distance. Below are the best locations to farm Celestine.

Location	Zone	Depth
Alien Ruins	Found around the Research Outpost or Alien Ruins zone	200-250 meters
Karakorum Deep	high-density farm zone	250-00 meters
Southeast of Research	Around a Needler nest biome. Roughly southeast of the Alien Ruins base	200-250 meters

Below is the best farming route method for Celestine in Subnautica 2.

Start at Alien Ruins Research Base
Move southeast into the Needler nest area
Sweep rock walls & seabed for blue crystal clusters
Continue toward Power Plant or Observatory zones
Return to base and repeat after restocking

How to build the Modification Station

After unlocking the Modification Station blueprint by scanning it in the Research Outpost, building it is straightforward. It can only be placed inside a Seabase room, not in your Lifepod or in open water. Make sure to have a Seabase room, power for the base, and a Habitat Builder tool. You need to have the following materials to build the Modification Station.

2x Titanium
2x Copper
2x Celestine

The easiest way to get Titanium early is to look for small Titanium nodes scattered across the ocean floor. Titanium ore appears as breakable rock deposits. Here are the steps to acquire the Titanium.

Swim up to a deposit.
Interact with it to crack it open.
Collect the Titanium pieces that drop.

Small deposits are easy to break, while larger deposits take more effort. The best possible way to collect Titanium is by collecting Metal Salvage from ruined structures. Copper commonly spawns on cave walls and ceilings. As soon as you start the game, swim straight down beneath the Lifepod. Copper commonly spawns on cave walls and ceilings. Make sure to look for a large coral dome east of your starting position.

Once you’ve got all the materials, you need to equip the Habitat Builder and select the Modification Station from the interior facilities list. Below are all the steps to build the Modification Station.

Equip the Habitat Builder and open the build menu.
Navigate to Interior Facilities and select Modification Station.
Place it against a wall.
Aim at a clear wall inside your base and ensure there is enough space around it.
Hold the build button until construction completes.

Once installed, the Modification Station unlocks advanced crafting options that are unavailable at the standard Fabricator.

All Upgrades at Modification Station

The Modification Station is where Subnautica 2 moves from basic survival crafting into advanced upgrades. Once built in your Seabase, it unlocks categories of upgrades. The first one is the Tadpole vehicle modules, while the other one is the prototype tool modifications.

Tadpole Upgrade Modules

These upgrades are crafted at the Modification Station and then installed into your Tadpole. You use these upgrades to improve depth capability, survivability, efficiency, and utility. Below are all the Tadpole Upgrades and what each does.

Tadpole Depth Module Mk. 1: Increases safe diving depth.
Tadpole Depth Module Mk. 2: Boost maximum depth for end game biomes.
Engine Efficiency: Mitigate power consumption and extend battery life.
Photovoltaic Charger: Gives passive charging in suitable conditions.
Strike Armor: Reduces damage from creature attacks and collisions.
Cavitation Muffler: Makes the Tadpole quieter and harder for wildlife to detect.

Prototype Tool Modifications

The Modification Station also upgrades certain Alterra tools into more advanced versions. Below are all the Prototype Tool Modifications and what each does.

Bioscanner: Enables advanced biological scanning.
Feedback Resonator: Advanced upgrade of the Sonic Resonator, letting you fire a sonic projectile at range.

Conclusion

Modification Station is what separates early survival gameplay from mid-to-late game exploration. This is because it unlocks advanced upgrades that the Fabricator cannot craft. Without it, your vehicle and gear quickly hit limits, which block progression into deeper biomes. You do not craft it blueprint, but find it in the world. Research Outpost in Alien Ruins is the best spot to find the Modification Station in Subnautica 2. The strategy is to equip the scanner, approach the station, and scan once. Depth Module Mk. 1, Engine Efficiency, and Strike Armor are the best upgrades to craft because they provide the biggest improvements to exploration range and survival. If you still haven’t bought a Subnautica game key, then LootBar is the reliable option due to the lower price and instant delivery.