Subnautica 2 drops you into an entirely new ocean on Planet Proteus with almost no hand-holding. There's no traditional map, oxygen is always ticking down, and Leviathans are lurking at depths you'll eventually need to reach. The good news: the early game is forgiving if you know what to focus on first. These 9 tips cover everything from oxygen management to vehicle progression, so your first few hours go somewhere other than the respawn screen.
Scan everything you see
Your scanner is active from the moment you spawn. Use it constantly. Every creature, resource node, and piece of wreckage you scan adds a data entry to your PDA and, more importantly, unlocks crafting blueprints you'll need later. According to GameSpot's coverage of the early access launch, the rule is simple: scan anything you see for the first time, even a common fish or a rock you've already picked up. The scanner costs you nothing but a few seconds, and missing a scan early can leave you short on recipes when you need them most.
For a full breakdown of how the scanner works and which items to prioritize, check out the Subnautica 2 scanner guide covering how to scan new items and unlock recipes.
Scan early, scan often
Don't explore too far, too fast
The map opens up almost immediately, but that freedom is a trap for new players. Spend at least 2 to 3 hours in the starter shallows before pushing into new biomes. This is where you gather the resources needed for early survival, learn how oxygen depletion works in practice, and build your first base without the pressure of hostile creatures nearby.
Deeper regions aren't designed for underprepared players. Leviathans patrol certain depths, and running into one before you have oxygen upgrades or a vehicle is a fast way to lose your gear.
Oxygen restrictions will physically block some areas early on, but many dangerous zones have no such gate. Curiosity is fine; sprinting toward distant landmarks without a return route is not.
How do you manage oxygen efficiently?
Oxygen is the single resource that ends runs faster than anything else in Subnautica 2. Every dive needs a planned return route before you go down. As you progress, upgrading your oxygen tank should be the first character upgrade you chase, ahead of base expansions and most tools.
According to Game8's beginner guide, many deeper biomes simply aren't designed for early exploration. Increasing oxygen capacity first lets you stay down longer, which means fewer surface trips and safer progression into new areas.
Upgrade oxygen before diving deep
Before any deep dive, check your route back. A beacon placed at the descent point means you always know which direction leads to air.
Place beacons everywhere
There is no pull-up map in Subnautica 2. Navigation relies entirely on environmental landmarks, terrain recognition, and beacons you place yourself. Beacons are craftable items you can drop anywhere in the world. Once placed, you name them, and they appear as labeled icons on your HUD.
GameSpot's tips guide describes beacons as the closest thing the game has to a map system. The subnautica2map.com multiplayer guide goes further, recommending that in co-op sessions, one player is assigned specifically to beacon placement before the group fans out, because four players strip resources fast and can lose their route home just as quickly.
Name beacons clearly: "Base Alpha," "Kelp Cave Entrance," "Copper Deposit" all work better than leaving them as defaults. The more specific, the more useful they are when you're disoriented at depth.
Build your starter base in the shallows
Resist the urge to build your first base somewhere that looks impressive. A functional starter base near the spawn area, with basic storage containers and crafting stations, is worth far more than an elaborate structure in a distant biome. According to GameSpot, you'll be in the starting area for most of the early game anyway, so proximity to your base saves constant travel time.
When you're ready to move on, you can recover all your materials from the starter base and relocate. Nothing is wasted.
For detailed placement advice and what to build first, the Subnautica 2 base building guide on finding the Habitat Builder covers the full setup process.
Place your base near key resources and in a safe zone. A base that requires a dangerous swim every time you need to craft is a base you'll avoid using.
Build the Tadpole before expanding your base
The first vehicle you can build is the Tadpole, which GameSpot describes as similar to the Seamoth from the original Subnautica. It lets you move faster across the map, reach greater depths, and carry additional items on longer expeditions. According to GameSpot's tips, the Tadpole is arguably the best early-game upgrade available, and you should prioritize its construction over spending materials on base expansion.
The logic is straightforward: a bigger base makes your existing area more comfortable, but the Tadpole opens up entirely new areas and accelerates progression in ways a larger storage room simply cannot.
What should you prioritize upgrading first?
Character upgrades outrank most other crafting goals early on. Your oxygen tank, suit, and personal equipment directly determine where you can go and how long you can survive there. Unlocking new crafting recipes depends on reaching new biomes, and reaching new biomes depends on having the survivability to get there.
GameSpot's guide is direct on this: upgrading your oxygen tank, suit, and other personal equipment is more important to early survival than any base or tool upgrade. New recipes and resources unlock as you explore deeper, so the character upgrades pay forward.
Manage food carefully and keep emergency supplies
Food spoils in Subnautica 2. Catching and cooking two dozen fish at once sounds efficient until half of it rots in your inventory before you eat it. The better approach, according to GameSpot, is catching what you need plus a small buffer. Fish are plentiful enough that you don't need to hoard.
Separately, always reserve a few inventory slots for emergency supplies: extra food, water, a first aid item, and an Air Bladder. These are for situations where an expedition runs long or a creature forces you into an unplanned retreat. Losing those slots to extra resources you don't need yet is a mistake that tends to hurt at the worst possible moment.
Reserve slots for emergencies
Listen to the audio cues
Planet Proteus communicates danger through sound before it shows it to you visually. Leviathans make noise before attacking. New biomes have distinct audio signatures that tell you something about what lives there before you see it. GameSpot's guide identifies audio cues as one of the most underrated survival tools in the game.
Play with headphones if you can. The difference between hearing a Leviathan approaching and being surprised by one is the difference between a controlled retreat and a death screen.
How does multiplayer change the early game?
Subnautica 2 supports up to 4 players in co-op, with drop-in and drop-out functionality and cross-platform play between PC and Xbox. According to Game8, shared PDA entries and discovered information update for the whole team, so one player scanning a creature benefits everyone.
The subnautica2map.com multiplayer guide recommends splitting into four roles for efficient sessions:
- Quartermaster: Stays near base, manages power, keeps food and oxygen stocked
- Gatherer: Runs resource loops and supplies the Quartermaster
- Scout: Pushes outward, drops beacons, records landmarks and confirms map markers
- Biologist: Scans fauna and flora, tracks food sources, warns the team before entering unknown ecosystems
The Scout role is worth highlighting specifically because beacon placement and landmark documentation are the co-op equivalent of map awareness. A Scout who drops beacons consistently keeps the whole team oriented.
The game is built single-player-first, so no story content or progression is locked behind multiplayer. Playing solo is a complete experience.
For more on getting started across every system, the Subnautica 2 ultimate beginner's guide covers the full range of early mechanics in one place. You can also find the complete Subnautica 2 guide collection for deeper dives into specific systems as you progress through the survival game.