Subnautica 2 Beginner Guide: Surviving Your First Days Underwater

Subnautica 2 starts with you waking up wet, alone, and holding about 45 seconds of air the moment you duck under. That's the whole vibe of the first few days: short dives, quick trips home, and a growing pile of gear that slowly turns the ocean from terrifying into familiar ground. Here's how to get through the opening stretch in one piece, solo or with a crew (co-op takes up to four players, crossplay included).

Crash Landing and Initial Priorities

Quick story note first. The colony ship Cicada was headed for a desert planet called Zezura when the ship's AI diverted course and crash-landed on an uncharted ocean moon, named Proteus by the survivors. That crash is old news by the time you show up, though - it happened decades ago. You play a Qualified Investigator, a fresh body the ship's AI (NoA, short for Noetic Advisor) prints up to figure out where the settlers went. You don't remember the crash. You just inherit the mess.

Your lifepod launches from bay 73 during the intro and always lands in the same spot in the Shallows, floating right above a big cave opening. That fixed spawn is handy - wrecks and points of interest keep the same coordinates in every save, so anything you learn about the map stays useful on your next run.

Inside the pod you get four things:

• A biobed. Your respawn point. Die anywhere and NoA reprints you here (or at any biobed you set later).
• A NoA terminal. The orb that talks to you. It picks up signals - mostly black boxes from the missing crew - and sends you out to check them. That's the story engine: get a signal, swim out, find the box, come back for the next transmission.
• A storage locker with 35 slots, starting with 1 Basic First Aid Kit and 3 Nutrient Blocks inside.
• A corrupted fabricator. It handles the basics only. Anything advanced has to be built at a fabricator you place inside your own base, and that's one big reason to get a base going.

So what actually comes first? Day one, roughly in order:

1. Grab loose metal salvage, quartz, and copper near the pod. One metal salvage breaks down into 4 titanium at the fabricator, and titanium is in almost every early recipe.
2. Build the Survival Multitool (3 titanium). Your harvester for anything too tough to just pick up.
3. Follow NoA's first signal. The opening objectives stay close to home and walk you past useful wrecks.
4. Cure your stomach at the Angel Comb northeast of the pod, about 160 meters out. This one's big - details in the food section below.
5. Don't fight anything. More on that with the tools.

While you're swimming, two air rules matter a lot. You start with 45 units of oxygen and burn roughly one per second above 100 meters, so your first dives are short by design. When you surface, look straight up - you swim faster in the direction you're facing, and rising face-down wastes seconds you don't have. And if your air does hit zero, there's a tiny grace period after the screen goes dark before you actually die. People survive on that sliver all the time.

One more thing: your inventory and blueprint screens don't pause the game. Only the system menu does (Esc, or Options on a controller).

Death is mostly an errand, not a disaster. You reprint at your biobed with a full health bar, and everything you were carrying waits in a storage cache at the spot where you went down, marked with a signal you can follow back. Before you do anything risky, drop a manual save.

Building Your First Base and Oxygen Supply

Getting the Habitat Builder

Base building starts with a tool, not a building. The Habitat Builder recipe unlocks after you scan 2 Habitat Builder fragments, and those fragments are scattered all over the shallow zone near the pod. Two of the easiest sit right at the Welcome Center, a pioneer structure a short swim from home - one fragment outside at about 9 meters, one underneath at around 16. More wait in caves east and west of the lifepod, none deeper than about 25.

The builder itself costs 2 titanium, 1 glass, 1 Basic Battery, and 1 copper wire. All of that traces back to shallows junk: glass is 2 quartz, a battery is 2 copper plus 1 Acidic Raion pouch picked off the spiky raions, and copper wire is 2 copper.

What the first base actually needs

The temptation is to build something pretty. Save that for later. A first base has a job: hold your stuff, craft everything the pod's corrupted fabricator can't, and give you a safe air pocket in the middle of a long run. The cheap version that does all three:

• Room (5 titanium) plus a Hatch (1 titanium, 1 quartz) for the shell
• Fabricator (1 titanium, 1 copper, 1 quartz) - now every unlocked recipe is buildable, and it pulls materials automatically from your inventory and any lockers in the base
• Two wall lockers (2 titanium each) - one for raw mats, one for tools and snacks. A single locker fills up shockingly fast.
• Solar panel (1 titanium, 2 quartz) - and put it on the roof. Side-mounted panels catch a fraction of the light since the alien sun sits high, and a side rig can bottom out overnight.
• Biobed (3 titanium, 1 glass, 1 copper wire) - set it as your reprint point
• A NoA terminal (3 titanium, 1 copper wire, 1 glass) if you'd rather get transmissions here than swim back to the pod

That's around 20 titanium plus some odds and ends. An evening of salvage, give or take.

Hull integrity is real, too. Modules built past their depth rating will crack, flood, and drag the lockers inside down with them. A shallow starter base won't hit that, but keep a manual save before any deep expansion.

And plan on building again. The map is big, and once you push out toward the Karakorum ruins you'll want a forward base there instead of a 500-meter commute home.

Your oxygen supply, worst to best

The starter 45-unit tank runs dry in about 45 seconds above 100 meters. The first fix is the Standard Air Tank: 2 titanium, 1 rubber (that's 2 Lucifer Rotsacs through the fabricator), and 2 silver. It's unlocked from the start and adds 30 units, taking you to 75 - a bit over a minute of bottom time, and roughly double your safe range from the surface. Silver shows up in the Plateaus, the Necrolei Hills, and the Dolerite Spires, so it's a close trip.

Tanks only drain while equipped, so a spare carried in your bag holds its air until you swap to it.

The rest of your air sources, because you'll use all of them:

• The surface. Free, always works.
• Your base or vehicle - but only if it has power, and fires inside a structure eat your air until you put them out.
• Oxygen Tunic plants. Teal bulbs with purple tips that release a bubble you swim through for a top-up. Learn these on day one; they line a lot of shallow routes.
• The Air Bladder (2 titanium, 1 rubber). Squeeze it to rocket toward the surface, or inhale it for a few seconds of air. One or the other per use, then it refills next time you surface.
• The Oxygen Control biomod (biomods being the mutation abilities you pull off Angel Combs), which slows consumption. You can unlock it early by powering the Bio Lab at the Welcome Center with a single battery.

Down the line there's the High Capacity Air Tank (a Standard Tank plus a Plasteel Ingot) and the Rebreather. One warning: below about 200 meters your air burns several times faster than the shallows rate. That's a turn-around wall, not a push-through wall, until your gear catches up.

Scanning and Fabricating Essential Tools

The scanner runs the whole game

Craft the Scanner before almost anything else: 2 titanium, 2 quartz, 1 Basic Battery. Point it at anything mechanical, dead, or rooted in place and hold the trigger. Scans do two jobs - they write databank entries (lore, creature info) and they unlock fabrication blueprints. Most recipes don't come from a menu - they come from scanning a fragment, a wreck chunk, or a piece of pioneer equipment.

So the habit that separates a fast start from a slow one: scan everything that isn't swimming around. Living things can be scanned too for lore, but progression lives in the dead stuff. Co-op makes it better - databank entries and recipe cards are shared with the whole team.

A craft order for day one

1. Survival Multitool - 3 titanium
2. Scanner - 2 titanium, 2 quartz, 1 Basic Battery
3. Flashlight - 2 titanium, 1 quartz, 1 Basic Battery. Night underwater gets pitch dark.
4. Basic Fins - 2 rubber, 2 fiber. Rubber is 2 Lucifer Rotsacs; fiber is 2 Fibrous Pulp from the anchored life all over the shallows. Straight speed upgrade.
5. Standard Air Tank - 2 titanium, 1 rubber, 2 silver
6. Air Bladder - 2 titanium, 1 rubber. Cheap insurance.
7. Habitat Builder - 2 titanium, 1 glass, 1 Basic Battery, 1 copper wire, once you've scanned its fragments

The multitool is not a weapon

Hitting wildlife with it drops nothing useful, burns durability, and makes life worse: anything you smack will hunt you across the map and only give up when you die or enter a base. Most creatures forget you the second you swim away. The winning move is distance, not violence - the game is openly built around vulnerability rather than weapon combat.

Know your starter conversions

A few basic recipes run through nearly everything you'll make early:

| You have | You make | Cost | |---|---|---| | Metal Salvage | Titanium | 1 salvage gives 4 titanium | | Quartz | Glass | 2 quartz | | Fibrous Pulp | Fiber | 2 pulp | | Lucifer Rotsac | Rubber | 2 rotsacs | | Copper + Acidic Raion Pouch | Basic Battery | 2 copper, 1 pouch | | Copper | Copper Wire | 2 copper |

Wrecks hold the real unlocks

Data chips and recipe cards show up in wrecks and bunkers, usually next to storage caches with consumables. The best early target is the Cicada's Lander Garage wreck, sitting east in the Lead Zone (34 to 65 meters down). Scanning there unlocks the Repair Tool, the Processor, the Rebreather, the Bioreactor, and the Tadpole - your first vehicle. The Tadpole still needs a dock, a vehicle fabricator, and processed ingots from the Processor, so it's a medium-term goal - but every unlock is sitting in one shallow wreck a short trip from home.

Two small things that pay off immediately: beacons (1 titanium, 1 copper) dropped on anything you want to find again, because there's no map - beacons, landmarks, and toggled signals are how you find your way around. And a portable locker (4 titanium) before a big gathering run: it holds roughly half a wall locker's worth, and you can drop it, stuff it, and carry the whole box home.

Managing Hunger, Thirst, and Health

One toggle you can't undo

When you start a new game, you choose whether hunger and thirst are on, and you can't flip it later on that save. Keeping them on gives the classic survival feel. Turning them off removes a chore without breaking anything, since oxygen, pressure, and predators are still fully in the business of killing you. Neither choice is wrong - just decide on purpose.

Fix your stomach before anything else

Every new save starts with Digestive Incompatibility: you can't keep any local food down, even cooked. Your food and water bars just drain with nothing to do about it, which is a slow death sentence if you ignore it.

The fix is close and easy. Northeast of the lifepod, about 160 meters out, an Angel Comb grows right above Anita's black box in about 5 meters of water. Follow NoA's signal for Anita, find the big pink bulb on the comb, and interact with the Gene Donor. That grants the Digestion adaptation - and as a bonus, touching it refills your oxygen, health, food, and water on the spot. A free full heal five minutes into the game.

Water

The entire hydration loop is one creature. Water Slugs are passive, common in the shallows, and one slug becomes a bottle of Water at the fabricator. Flash Slugs (the zappy defensive ones) plus salt make Isotonic Water, a fancier version. You'll also find bottled water sitting in wrecks and caches.

Food

Once Digestion is sorted, the local menu opens up. The small fish everyone catches early are Halfmoons and their cousins - Bluemoons, Harvestmoons - and the fabricator cooks each one into a solid meal. A few standbys:

• Cooked Halfmoon and the rest of the cooked fish line - the bread and butter
• Halfmoon Jerky - 2 Halfmoon plus 1 salt makes 2 pieces
• Hoverthorn Souvlaki - 3 Hoverthorn plus salt. Hoverthorns are those drifting passive things all over the shallows.
• Cherimoya Chutney and Pavlova, once you're picking cherimoya rotsacs and Deepwing egg clumps over in the Plateaus
• Nutrient Blocks - made from a biofuel block plus salt, and the lifepod locker starts you with 3

Rule of thumb for trips: a couple of waters and two or three snacks - enough for an emergency without burning bag space you need for titanium.

Health

Health drops come from creature bites, heat, and your own creative driving later on. Fixes from weakest to strongest:

• Medical Gel Sacs picked from Acid Raion plants - eat one raw for +10
• Basic First Aid Kit - 2 fiber. Cheap; keep one on the belt.
• Enhanced First Aid Kit - 1 fiber plus 1 Medical Gel Sac, good for about +50. This is the one that matters.
• Staying fed and hydrated, which triggers slow natural regen - a healthy diver heals without using anything
• And death stays the full reset: reprint at the biobed, full bar, go collect your cache

Early Biomes Safe to Explore First

Everything below sits in the starting region, Coral Gardens. Depths and resources straight from the wiki:

| Biome | Depth | What's worth the trip | |---|---|---| | Shallows | 0-224m | titanium, quartz, copper, Water Slugs, Acidic Raion, Medical Gel Sacs, Lucifer Rotsacs | | South Raceway | 0-85m | copper, salt, titanium | | North Raceway | shallow strip | copper, quartz, salt, titanium | | Plateaus | 23-119m | silver, quartz, copper, Cherimoya Rotsacs, Deepwing egg clumps | | Necrolei Hills | 0-100m | silver, Medical Gel Sacs, Necrolei cysts | | Lead Zone | 34-65m | lead, plus the Lander Garage wreck | | Dolerite Spires | 0-128m | lithium, silver, titanium | | Graveyard | 0-266m | gold, sulfur, salt, Tadpole Pens |

The home turf

The Shallows are your front yard, and most of day one lives here. That 224-meter range is misleading - it includes the big hole just southeast of the lifepod, which drops fast. Your day-to-day work is up on the shelf. Two locals cause trouble: Nibbler Mangos will pick fights out of nowhere, and Hammerheads mostly ignore you unless you swing first. Both lose interest once you're far enough away or inside a base.

The two Raceways are shallow, quiet strips south and north of home - copper, quartz, salt, titanium, basically zero drama. Perfect "empty your pockets and fill them" runs.

The Plateaus are the first real upgrade trip: 23 to 119 meters, silver on the ground, cherimoya rotsacs to pick, plus two pioneer sites (Camp One and the Old Habitat) stuffed with scannables and storage. Bring the 75-air tank and a beacon.

The Necrolei Hills sit in the same depth band and also carry silver, gel sacs, and the necrolei bits that go into Strong Acid. The Dolerite Spires run a touch deeper, to 128, and add lithium to the menu - worth the swim once the Standard Tank feels comfortable.

The Lead Zone is small and shallow but punches way above its weight. It's your lead source, and it hosts the Lander Garage wreck with all those fragment unlocks. If you only take one goal-driven trip in your first few days, make it this one.

The Graveyard is the edge of the safe world. Its shallow margins hold gold, sulfur, and salt, plus the Tadpole Pens and the Tailings Village. The deep lanes down toward 266 meters, the hot cave area, and the Great Jaw's territory around the 100-meter mark are not beginner content. Skim the surface when you cross open water, drop only when the signal says drop, and keep your audio on - ominous music means something huge is closing in.

About that leviathan

The Collector Leviathan doesn't work the starter region at all. It patrols the Intermediary Basin and the metal farms out past the Karakorum ruins. The rules that keep you alive anywhere: stay near the surface over deep water, listen for the music, and save your Distraction Flares for the truly giant ones - small and mid-size predators could not care less about them.

Treat depth past 200 meters like a subscription you haven't paid for yet. The first-week game is stacking small advantages: 75 air, a beacon on home, a locker per material, a silver route you could swim in your sleep. Get those down and the deep stuff stays a choice instead of a funeral.