Subnautica 2 Endgame Progression Guide

What is Subnautica 2’s Endgame?

The Alien Ruins — endgame territory

The endgame starts once you cross the deep open water to the Alien Ruins. This is where the final story progression happens.

Endgame Priorities

1. Survive Against Leviathans

The Collector Leviathan guards the path

Have Scout Chassis on your Tadpole to outrun it.

2. Explore the Alien Ruins

New region with new discoveries

Find new tech and collect new materials.

3. Build Base in Alien Ruins

Set up a base to avoid repeated Chasm crossings

Build crafting stations and Battery stations first

Build Modification Station for tool upgrades

4. Upgrade Your Tadpole

Tadpole Depth Module Mk.1 — essential for Alien Ruins

Module	Effect	Recipe
Depth Module Mk.1	Max depth 450m	Celestine x3, Enameled Glass x2, System Chip x1
Strike Armor	Reduces damage	Enameled Glass x2, Strontium x2
Engine Efficiency	Reduces power use 20%	Titanium Ingot x1, Glass x2, System Chip x1
Photovoltaic Charger	Charges in shallow water	Copper Ingot x1, Strong Acid x1, Troilite x1

5. Upgrade Tools

Find Alien upgrades in the ruins

Tool	Recipe
Bioscanner	Scanner x1, Enameled Glass x2, Conduit Crystal x3
Feedback Resonator	Sonic Resonator x1, Enameled Glass x2, Conduit Crystal x2, Strontium x2
Improved Fins	Basic Fins x1, Fiber Mesh x1, Conduit Crystal x2
Ultra High Capacity Air Tank	High Capacity Air Tank x1, Troilite x3, Atacamite x3

6. Complete the Current Story

Learn Alien Language, fix Power Plant, open Observatory

7. Collect All Biomods

Push to unlock all available Biomods

---

The Bottom Line: Subnautica 2 doesn’t hold your hand, and that’s exactly why we’re here. The progression loop is simple: explore, find something that kills you, build the thing that stops it from killing you, go deeper. Get the Digestion Adaptation early. Build a base near the Alien Ruins before you attempt the crossing. And when NOAH marks a Blackbox location? Go there. That’s the game telling you where the good stuff is.