How to Survive Your First 100 Days in Subnautica
Dropping onto an alien ocean with nothing but a hidden‑by‑mist Lifepod can feel both exhilarating and terrifying. The first hundred in‑game days are a whirlwind of scavenging, building, and learning just how deep the sea can bite. Below is a conversational, step‑by‑step look at what you’ll need to keep your oxygen tanks full, your thirst quenched, and your curiosity satisfied.
Day 1‑10: The Essentials
When the water’s still dark and the creature noises are just a distant hum, focus on the basics.
- Fabricator: Craft it from the Lifepod’s terminal using the 2× Titanium and 2× Copper Ore you’ll find nearby. It becomes your kitchen, workshop, and emergency medic.
- Oxygen: Gather titanium and copper to build a Scanner and start mapping the immediate area. The scanner also reveals oxygen sources like kelp forests.
- Food & Water: Harvest Bladderfish for quick water, and pick Garry’s algae or “Cave Plume” for calories. A simple Water Filtration Machine can be assembled once you’ve secured enough titanium.
Don’t rush to build a base yet; the early ocean is unpredictable, and staying mobile lets you react to sudden currents or hostile fauna.
Day 11‑30: Setting Up a Safe Spot
By now you’ll have a rough map of the shoreline and a handful of resource nodes. It’s time to claim a corner of the sea.
Choosing the Right Location
A good base spot satisfies three criteria:
- Proximity to resources – titanium, quartz, and copper should be within a short dive.
- Accessibility to fresh water – near kelp or a shallow spring.
- Relative safety – avoid the immediate territory of Stalkers or the deeper Abyssal zones.
Many players favor the Megalodon Cave entry point: it offers a natural shelter and a clear line of sight to the surface.
Building the First Habitat
Start with a Multipurpose Room (the “hub”). It grants power, storage, and a place to install a Solar Panel. Add a Water Filtration Machine inside, then a Fabricator for on‑site crafting.
Don’t forget a Battery Charger – you’ll be mining out of oxygen later, and a few extra amps can mean the difference between a successful dive and a frantic sprint to the surface.
Day 31‑60: Expanding Horizons
Now the ocean feels less alien, but the challenges get bigger. It’s time to explore further, upgrade gear, and tackle tougher creatures.
- Upgrade your suit with a Reinforced Dive Suit – just a few extra titanium and you’ll gain extra oxygen capacity.
- Blueprints for Seamoth and Prawn Suit become available after a few scans. Build a Seamoth first; it’s your underwater taxi.
- Power: Replace solar panels with a Thermal Plant if you plan to settle near vent zones.
If you’re feeling adventurous, venture toward the Floating Island. The region holds golden pearls and rare minerals, but also the first encounter with a Reaper Leviathan. Keep a distance until you’ve mastered quick‑escape maneuvers.
Day 61‑80: Mastering Resources
At this point the game feels less about survival and more about optimization.
Efficient Mining
Set up a Miner in a safe zone and feed it a continuous supply of titanium ore. Connect the output to a Reinforced Fabricator and you’ll have a steady stream of building material without leaving your base.
Food Production
Plant a Base Water Plant and grow Kelp and Marblemelon. These crops provide a reliable food source and also generate bioluminescent algae for decorative lighting – a nice morale booster.
Dealing with Predators
Rather than fighting, many seasoned players install Defensive Turrets around high‑traffic routes. They cost a bit of power, but the peace of mind is worth the trade‑off.
Day 81‑100: Preparing for the Endgame
The final stretch is where you lay the groundwork for the story’s climax – the alien AI “Leviathan” and the beacon that will launch you home.
- Gather advanced blueprints like the Hatched Egg and Deep Dive Helmet. They require rare resources such as Lithium and Plasteel Ingots.
- Construct a Base Jump Pad near the Primary Containment Facility. It speeds up the final sprint to the Aurora wreck.
- Upgrade your Prawn Suit with a Drill Arm and Laser Cutter. These tools make cutting through the Aurora’s hull a manageable task.
Don’t forget to save often. The deeper you go, the more unpredictable the environment becomes, and a sudden breach can wipe out hours of progress.
Quick Reference Checklist
- Fabricator and basic tools – days 1‑5
- Water Filtration and food sources – days 5‑10
- First base (Multipurpose Room) – days 15‑20
- Seamoth and power upgrades – days 30‑45
- Mining automation and crop farms – days 60‑70
- Defensive turrets and advanced gear – days 70‑90
- Endgame preparations (Prawn Suit upgrades, beacon components) – days 90‑100
Surviving a hundred days in Subnautica isn’t about perfect timing; it’s about adapting to the rhythm of the ocean. Embrace the occasional mishap, learn which creatures are worth avoiding, and let the underwater world gradually become your home. Happy diving!
