Subnautica 2 Beginner Guide: First Hours on Planet Proteus (2026 Early Access)

I crash-landed on Proteus three times before I figured out what the game actually wants from you in the first hour. The Cicada's wreckage is scattered across the Shallows and the AI, NoA, keeps printing cryptic messages about "qualified investigators" while you're just trying to figure out which fish won't poison you.

Here's what I wish someone told me before my first dive.

Forget Everything From the First Game

Yeah, I know. You built a Cyclops in Subnautica 1 and felt like a god. Proteus doesn't care. There's no Seamoth here. No Stasis Rifle waiting in a convenient wreck. The crafting tree is different, the threats are unfamiliar, and the whole DNA modification system changes how you approach survival.

The biggest shock for me was realizing there's no traditional weapon progression. Unknown Worlds doubled down on their "you're not a soldier" philosophy. You survive through adaptation. Biomods replace weapons. Get used to scanning creatures not to kill them but to steal their biological tricks.

Hour One: The Scanner Rush

Get out of your escape pod. Ignore NoA's chatter for a minute. Here's the only crafting order that matters in your first 30 minutes.

Scanner first. Always. It costs a measly bit of titanium and a battery. Without it you're swimming blind. Every fragment you scan unlocks blueprints for tools, base parts, and eventually Biomods. I wasted an hour on my first run picking up random plants before I realized scanning them actually teaches you what they do.

Then a Survival Knife. The Shallows have these small aggressive fish called Snapjaws. They're not deadly but they're annoying. A couple of slashes sends them off.

Fins and an O2 Tank come next. Your starting oxygen is pathetic. Maybe 45 seconds. The basic tank doubles it. Fins make you noticeably faster. You'll want both before venturing past 50 meters.

One thing I noticed that the game doesn't tell you: metal salvage nodes in the Shallows give way more titanium than limestone outcrops. Look for the twisted metal chunks near the Cicada debris field. Three salvage nodes and you've got enough titanium for your first five tools.

The Tadpole Changes Everything

Around hour three or four you'll find the Mobile Constructor Bay blueprint. This floating platform builds your first vehicle: the Tadpole. It's a tiny sub, like a personal underwater pod. The thing handles like a shopping cart at first, honestly. But once you get used to it you'll wonder how you ever swam everywhere.

What makes the Tadpole interesting is the chassis system. You can swap the base chassis for different configurations. The cargo chassis adds storage. The scout chassis boosts speed. The deep chassis gives you more crush depth. I stuck with cargo for my first 10 hours because inventory management without it is a nightmare.

The Tadpole blueprint fragments are in the Kelp Forest equivalent on Proteus, which the community is calling the "Vine Tangle" biome. Look for glowing orange pods on the vines. Those are the fragment spawns.

Biomods: The Real Progression System

This is where Subnautica 2 gets weird in the best way. When you scan enough creatures in a biome you unlock DNA templates. Feed those into the Biomod station and you can graft creature abilities onto yourself.

My first Biomod was from scanning those little glowing jellyfish in the Shallows. It gave me a faint bioluminescent aura. Not exactly game-breaking but it meant I stopped needing the flashlight at night.

Later Biomods get significantly more useful. Increased lung capacity from scanning deep-water fauna. Thermal resistance from volcanic biome creatures. Electric discharge defense from those eel-like things in the Trench. I won't spoil the full tree but trust me, the system rewards thorough scanning in a way the first game never did.

The catch: Biomod slots are limited. You start with two. Expansion chips are rare. Choose carefully.

Base Building on Proteus

Your first base doesn't need to be fancy. A Multipurpose Room, a Fabricator, a couple lockers, and a power source. That's it. I built mine at about 80 meters in the Shallows near a thermal fissure. The heat vent gives you access to Thermal Plant power later, and you're high enough that solar still works as a backup.

The mistake I see new players make: building too big too early. You don't have the blueprints to fill four Multipurpose Rooms. You don't have the hull integrity to support a moonpool. Start small. Expand when you actually need the space.

What Kills New Players

Drowning. Still drowning. Just like the first game. The O2 warning at 10 seconds is already too late if you're in a winding cave at 150 meters. I set a mental alarm at 30 seconds and turn back immediately. Tedious but I haven't drowned since.

The other big killer is the Brine Crawler. Nasty crustacean thing that camouflages against the seafloor in the deeper parts of the Shallows. You won't see it until it moves. If you hear a clicking sound, stop and look down. It usually backs off if you stare at it. No, seriously.

Oh, and don't eat raw Spinefish. Just don't. Cook everything.

Co-op Changes Everything

This is the first Subnautica with multiplayer. Up to four players. Having a friend means someone watches your oxygen while you mine. It means you can split tasks. One person builds the base while the other scouts for blueprints. It also means twice the resource consumption and much more aggressive fauna spawns.

The game scales difficulty with player count. Don't expect the Shallows to be as peaceful with three friends as it is solo. I learned that the hard way when a Brine Crawler that normally ignores you decided four players was too much trespassing.

One more thing about co-op: Biomods are per-player. You each build your own DNA library. Coordinate who specializes in what. My buddy went full exploration Biomods while I focused on resource gathering. It made our runs dramatically more efficient.

To be real with you, I'm still figuring out parts of this game. The Early Access build is deep but incomplete. Some biomes are clearly placeholder. The story about the Axum civilization and the Tailings only really kicks in around hour 15. But those first ten hours? Pure underwater survival bliss. Take it slow. Scan everything. And never trust the clicking sound.