Beginner’s Guide#
Subnautica 2 opens differently from most survival games: instead of a tutorial that explains all the rules, it drops you straight into the shallows and lets the colony AI’s scattered voice logs push you forward. The key to avoiding detours is not reversing the order of “exploring” and “building” — establish yourself first, then go deep.
I. Where You Are and What You’re Doing#
You play a freshly printed Pioneer. The mission brief is simple: prepare this moon for the colonists to come, and stockpile enough resources to print them. In practice it reduces to one line — stay alive, and keep getting stronger.
| Stage | Main goal | Completion sign |
|---|---|---|
| Landing | Read your surroundings; find stable food and water | No longer scrounging for hand-to-mouth snacks |
| Footing | First shallow base built; basic tools complete | Fixed storage and charging spots |
| Expansion | Build the Tadpole; push out your activity radius | Round trips to farther resource points |
| Descent | Acquire depth and heat adaptations; enter the ruins | Able to operate around the Karakoram |
II. The First Hour: Only Three Things#
Many new players swim deep immediately, run out of oxygen, lack gear, and can’t even find the way back. In the first hour, do only three things.
1. Do All the Scanning#
The scanner is the most important tool in the game, full stop. It serves three tracks at once:
- Unlocking fabricator recipes (scan wreckage fragments)
- Advancing the bestiary (scan creatures)
- Opening passive slots for biological mods (cumulative scans)
The criterion is simple: when you see something unscanned, scan it before deciding whether to take it.
2. Gather the Basic Four#
| Resource | Common source | Main use |
|---|---|---|
| Titanium | Shallow metal salvage | Basic building, tools |
| Copper | Shallow veins and fragments | Electronics |
| Quartz | Shallow reefs | Glass, viewports |
| Lead | The lead zone | Radiation shielding and some structural parts |
All four are obtainable inside the shallows without taking any risk.
3. Build the First Base#
Your first base doesn’t need polish — it needs three things: power, storage, and a docking point.
| Site criterion | Why |
|---|---|
| Shallow depth | Easy repeated trips; less oxygen pressure |
| Near wreckage | Materials and fragments close at hand |
| Open terrain | Future expansions won’t snag on rocks |
| On your route outward | No detours heading deeper later |
III. Don’t Ignore Biological Mods#
Many new players treat biological mods as late-game collectibles, but the 1.1 update moved them earlier. Their value: converting the act of scanning directly into stat growth.
| What you do | What you get |
|---|---|
| Find a bio lab module | One mod unlocked |
| Accumulate creature scans | Additional passive slots |
| Equip a mod | Passive benefit; uses no active equipment slot |
Criterion: whenever your route passes a lab module, go in and take it. Pure upside, no downside.
IV. Oxygen Is a Hard Constraint, Not a Soft Hint#
| Situation | Correct decision |
|---|---|
| Half your oxygen left | Stop gathering; head back |
| More than 20 seconds’ round trip from the surface | You need a mid-route breathing point |
| Warning tone sounds | Drop the gather or fight; solve oxygen first |
| Just upgraded your tank | Recalculate your radius; don’t reuse old habits |
The one-liner: whether a dive is safe isn’t measured by “how deep I got” but by “whether I can come back with enough oxygen.”
V. When to Build the Tadpole#
The Tadpole is currently the only submersible. It solves three things at once: speed, oxygen reserve, and cargo.
| If this happens | It’s time |
|---|---|
| One round trip can’t carry a full load | Not enough cargo |
| Most of your oxygen is spent just getting there | Not enough mobility |
| Repeatedly blocked by depth | You need vehicle pressure ratings |
Criterion: when you start worrying that “the road is too far” rather than “my gear is too weak,” build it.
VI. The Two-Hour Checklist#
- Scanner fabricated, with a “scan-on-sight” habit established.
- A stockpile of each of the shallow-water four.
- First base has power and storage.
- At least one biological mod acquired.
- Oxygen tank upgraded once.
- Return route memorized, or a beacon placed.
Once every box is ticked, you can push beyond the coral gardens. For region order and depth bands, see Biomes.
Related Pages#
- Subnautica 2 Hub — start here if the systems’ connections aren’t clear yet
- Tips and Tricks — this page covers the first two hours; that page has directly executable criteria for everything else
- Oxygen and Depth — this page treats oxygen as a return principle; the full mechanics live there
- The Tadpole — this page answers “when to build it”; configuration and use are there
- Biomes — your next stop after the checklist, region by region