Puzzles and Progression Locks
Subnautica 2 puzzle guides for progression locks, alien structures, power routing, door logic, terminal clues, and troubleshooting.
Unknown Worlds Development
Source: Steam store / Unknown WorldsVersion policy
Early Access
Updated
2026-06-12
Content pages
66+
Account features
Offline
Indexed entities
Alien structures
Puzzle and lore spaces where access, power, item, or story locks can block routes.
Indexed pages
8
Tracking pages
7
Beginner-safe
0
First-session priority board
Start with survival, scanning, storage, and repeatable routes
Use the guide hub to build one safe loop before chasing every nearby signal or resource.
Filter indexed pages
Narrow puzzles by query, difficulty, and Early Access confidence.
8 of 8 indexed pages shown
Puzzle Guide Overview
A spoiler-aware guide to reading Subnautica 2 puzzles, terminals, route locks, power routing, and alien structure clues.
Most progression puzzles should be approached as information problems: scan the room, identify power or access requirements, trace the route, then solve only the blocker in front of you.
Puzzle Overview Scan Room
650m - 950mUse this when a room feels confusing but the actual missing piece is a scan, power state, or route clue.
Power Routing Puzzles
How to read power-flow rooms, cable paths, terminals, and inactive devices without burning oxygen or missing progression clues.
For power routing, trace visible inputs and outputs first, then inspect inactive devices from source to destination. If nothing reacts, you likely need a scan, item, or later unlock.
Power Routing Node
780m - 1,000mUse this when switches, turbines, power lines, or locked states need a readable order.
Alien Structure Puzzles
A careful route framework for reading alien structures, terminals, symbols, and locked interior routes in Subnautica 2.
Alien structures should be cleared methodically: scan first, map the room, identify locks, avoid wasting oxygen, and return when a missing tool or story trigger becomes obvious.
Alien Structure Puzzle Anchor
900m+Use this when you need a puzzle checklist instead of a blind oxygen-draining room search.
Old Habitat Walkthrough
A spoiler-aware Old Habitat walkthrough focused on approach safety, entrance checks, scanning order, and progression blockers.
Treat the Old Habitat as a structure route: orient outside, confirm the entry and exit, scan interior objects in layers, and leave when a missing tool or story state becomes obvious.
Old Habitat Entry Route
500m - 750mUse this before entering the habitat so you know which blocker you are trying to solve.
Cicada Wreck Lander Garage Guide
A route and checklist guide for the Cicada Wreck Lander Garage, including entry, databox checks, and safe exit habits.
Handle the Cicada Wreck Lander Garage like a compact wreck route: find the safe entry, scan or open the key objective, confirm the reward, and leave before interior searching becomes random.
Cicada Wreck Lander Garage Entry
650m - 900mUse this when a wreck route needs a single objective instead of wandering through every compartment.
Alien Observatory Door and Turbine Guide
A puzzle walkthrough framework for activating the Alien Observatory door, reading turbine steps, and checking room-state changes.
For the Alien Observatory, read the objective state first, interact with turbine or door devices in order, and verify what changed before leaving the room or forcing another action.
Alien Observatory Turbine Room
850m - 1,050mUse this when the puzzle is about room state, turbine activation, and verifying what changed.
Giant Alien Power Plant Guide
A route and puzzle guide for starting the Giant Alien Power Plant, reading activation rooms, and preserving the return path.
Start the Giant Alien Power Plant by treating it as both a route and a puzzle: reach the device safely, identify the activation room, change one state at a time, and confirm the final room response.
Giant Alien Power Plant Entry
1,000m+Use this marker only after the route, tool, and oxygen requirements are understood.
Tadpole Pens Keycode Guide
A spoiler-controlled Tadpole Pens walkthrough for investigating the area, reading keycode clues, and opening the door cleanly.
At the Tadpole Pens, investigate the room before forcing the door: read the clue state, confirm the code source, unlock the door, then leave once the objective state changes.
Tadpole Pens Keycode Door
760m - 980mUse this when the door is the blocker and you need the clue, panel, and room-state order.
