Hey guys! So, you're thinking about taking on the challenge of surviving 100 days in Subnautica? Awesome! It's a thrilling experience that will truly test your skills and resourcefulness in this amazing underwater world. Subnautica, for those who might not know, is an open-world survival action-adventure video game developed and published by Unknown Worlds Entertainment. Players are tasked with surviving on the alien ocean planet 4546B, after their spacecraft, the Aurora, crashes on the planet's surface. The game is known for its stunning visuals, immersive gameplay, and the constant sense of wonder and danger that lurks beneath the waves. But surviving for 100 days? That takes some serious planning and know-how. This guide is here to help you do just that, breaking down the essentials and offering some pro-tips to ensure you not only survive but thrive in the depths.

Getting Started: Day 1-10

Okay, let's dive right in! The first 10 days are crucial in Subnautica. This is where you'll set the foundation for your long-term survival. You need to get the basics sorted, so you aren’t scrambling for resources later. These initial days are all about establishing a stable base, acquiring essential tools, and understanding your immediate surroundings. The urgency of these early actions cannot be overstated; you are, after all, stranded on an alien planet with limited resources and a whole lot of ocean to explore. Getting a handle on these basics early will make the rest of your 100-day survival challenge significantly smoother and more enjoyable.

Scavenging and Resource Gathering

First things first, scavenge everything you can from the Aurora wreckage and the immediate area around your lifepod. Look for metal salvage, titanium, copper ore, and quartz. These are your building blocks for tools and habitats. Don't underestimate the importance of basic resources; they are the cornerstone of your survival in the early game. Start by prioritizing the collection of titanium, which is essential for constructing your first habitat modules and tools. Copper ore is crucial for crafting electronics, which you'll need for advanced equipment and base functionalities. Quartz is another vital resource, as it is used to create glass for windows and other transparent structures, allowing you to observe the mesmerizing underwater world while remaining safe within your base.

Crafting Essential Tools

Next up, craft the essential tools: the Scanner, the Survival Knife, and the basic Fins. The Scanner is your best friend for finding resources and blueprints, the Survival Knife is for defense and gathering certain materials, and the Fins will significantly improve your swimming speed, making exploration far more efficient. The Scanner, in particular, is an indispensable tool. It allows you to scan fragments of technology scattered throughout the seabed, which in turn unlocks blueprints for more advanced tools, vehicles, and habitat modules. The Survival Knife is not only a defensive weapon against hostile creatures but also a versatile tool for harvesting certain flora and fauna. And, of course, the Fins are crucial for navigating the vast underwater environment; the faster you can move, the more you can explore and the quicker you can escape danger.

Building Your First Base

Now, let's talk about building a small base. A simple one-room compartment will do for now, but make sure to include a Fabricator and a Storage Locker. This is your safe haven, your crafting station, and your storage solution all rolled into one. Choose a location that is relatively safe, preferably in the Safe Shallows or the Kelp Forest, where hostile creatures are less common. The initial base doesn't need to be extravagant; a single compartment equipped with the essentials will suffice. The Fabricator is your primary crafting station, allowing you to create tools, equipment, and other necessary items. Storage Lockers are essential for organizing your resources, preventing your inventory from becoming cluttered and ensuring you can quickly access what you need.

Water and Food

Don't forget about your basic needs: food and water. Catch fish like Peepers and Boomerangs and cook them in the Fabricator. Craft a Still Suit to passively generate water as you explore. Dehydration and starvation are real threats in Subnautica, so managing your hunger and thirst is paramount. Peepers and Boomerangs are relatively easy to catch in the Safe Shallows and provide a decent source of food. Cooking them not only makes them more nutritious but also eliminates the risk of consuming raw fish, which can carry diseases. The Still Suit is a game-changer when it comes to water management. It passively converts seawater into potable water, allowing you to stay hydrated without constantly seeking out fresh water sources. Investing in a Still Suit early on will save you a lot of time and effort in the long run.

Mid-Game Mastery: Days 11-50

Alright, you've survived the initial scramble and established a foothold in the underwater world. Now, the mid-game, from days 11 to 50, is where things start to get really interesting. This is the time to expand your operations, explore further afield, and start tackling some of the game's bigger challenges. The mid-game is all about transitioning from basic survival to establishing a sustainable presence on Planet 4546B. You'll need to improve your mobility, expand your base, and delve deeper into the mysteries of the planet. This phase requires a more strategic approach, balancing resource gathering with exploration and technological advancement.

Expanding Your Base

Time to expand your base. Add more compartments, a Moonpool (if you've found the blueprint), and specialized rooms like a Scanner Room or a Multipurpose Room. A larger base means more storage, more crafting options, and more comfort. Think about adding windows for a better view of the underwater world! Expanding your base is not just about creating more space; it's about enhancing your capabilities and improving your quality of life. A Moonpool allows you to dock and recharge your vehicles, making exploration more efficient. The Scanner Room is an invaluable tool for locating resources and points of interest within a large radius. A Multipurpose Room can be customized to suit your needs, whether you want to set up an indoor grow bed for cultivating plants or create a dedicated research station.

Vehicle Acquisition and Upgrades

Vehicles are your key to exploring further and faster. Aim to build the Seamoth first – it’s fast, maneuverable, and can be upgraded with modules like the Depth Module and the Storage Module. Eventually, you'll want the Cyclops submarine for deep-sea exploration and the PRAWN Suit for resource gathering and combat. The Seamoth is a versatile vehicle that will significantly expand your exploration range. The Depth Module is a must-have upgrade, allowing you to access deeper and more resource-rich areas. Storage Modules provide extra inventory space, which is essential for long expeditions. The Cyclops submarine is a mobile base in itself, capable of housing the Seamoth and PRAWN Suit. It's ideal for exploring the deepest and most dangerous parts of the ocean. The PRAWN Suit is a powerful exosuit that excels in both resource gathering and combat, making it indispensable for tackling tough challenges.

Exploring New Biomes

Venture out and explore new biomes: the Grand Reef, the Dunes, the Lost River. Each biome has unique resources, creatures, and challenges. Be prepared for anything! Exploration is the heart of Subnautica, and each biome offers a distinct experience. The Grand Reef is a sprawling kelp forest teeming with diverse marine life. The Dunes are a vast desert biome known for its aggressive predators. The Lost River is a mysterious underground river system with unique flora and fauna. As you explore, keep an eye out for wrecks and abandoned bases, as they often contain valuable resources, blueprints, and story fragments.

Story Progression

Start following the storyline. Visit the Quarantine Enforcement Platform on Mountain Island and the alien structures scattered around the map. Unraveling the mystery of Planet 4546B will give you direction and purpose. The storyline in Subnautica is a compelling narrative that gradually unfolds as you explore the planet. Visiting the Quarantine Enforcement Platform and other alien structures will reveal crucial information about the planet's history and the events that led to your crash landing. Following the storyline will also unlock new technologies and areas to explore, adding depth and complexity to your survival experience.

Late-Game Domination: Days 51-100

Congrats! You've made it past the halfway mark. The late game, days 51-100, is about mastery and preparation. You've got the skills, the gear, and the knowledge to conquer anything Subnautica throws at you. The late game is where you truly establish your dominance over the underwater world. You'll focus on consolidating your resources, upgrading your equipment, and preparing for the final stages of the game. This phase requires careful planning and execution, as you'll be facing some of the most challenging environments and creatures in Subnautica.

Base Optimization

Optimize your base. Add power generators (Nuclear Reactor, Thermal Plant), a Water Filtration Machine, and grow beds for sustainable food production. A self-sufficient base is key to long-term survival. Power generators are essential for keeping your base running, especially as you add more power-hungry devices. The Nuclear Reactor provides a massive amount of power but requires careful management of nuclear waste. Thermal Plants are a more sustainable option, harnessing geothermal energy from thermal vents. The Water Filtration Machine automatically produces potable water, eliminating the need for the Still Suit. Grow beds allow you to cultivate edible plants, ensuring a steady supply of food.

Vehicle Upgrades and Customization

Fully upgrade your vehicles. Equip your Cyclops with a Shield Generator and a Sonar. Give your PRAWN Suit the Grappling Arm and the Drill Arm. These upgrades will make you unstoppable. Upgrading your vehicles is crucial for tackling the most dangerous environments in Subnautica. The Shield Generator on the Cyclops provides a temporary shield against attacks, while the Sonar reveals the surrounding terrain and creatures. The Grappling Arm on the PRAWN Suit allows you to swing through the environment and attach to creatures, while the Drill Arm is used for mining large resource deposits.

Endgame Exploration

Explore the endgame areas: the Lava Zones and the Primary Containment Facility. These areas are dangerous but hold vital resources and story elements. Be prepared for a challenge! The Lava Zones are the deepest and most hostile environments in Subnautica, filled with aggressive creatures and extreme temperatures. The Primary Containment Facility is an alien structure that holds the key to curing the Kharaa bacterium, a deadly disease that infects the planet. Exploring these areas requires careful planning, advanced equipment, and a healthy dose of courage.

Preparing for Departure

Finally, prepare for your departure. Gather the necessary materials to build the Neptune Launch Platform and the rocket itself. This is your ticket off Planet 4546B. Building the Neptune Launch Platform and the rocket is the ultimate goal of Subnautica. It requires a significant amount of resources and effort, but it's the only way to escape the planet. As you gather the necessary materials, you'll reflect on your 100-day journey and the challenges you've overcome.

Pro-Tips for 100-Day Survival

Okay, before you embark on your 100-day adventure, let's go over some pro-tips that will make your life a whole lot easier. These are the little things that can make a big difference between surviving and thriving in Subnautica.

• Map Out Your Route: Before heading out on an expedition, plan your route and mark important locations on your Beacon. This will prevent you from getting lost and help you find your way back to base. Mapping your route is especially important when exploring new biomes or venturing into dangerous areas. Beacons are invaluable tools for marking resource deposits, wrecks, and other points of interest.
• Carry Repair Tools: Always carry a Repair Tool and spare batteries. Your vehicles and base can take damage, and you don't want to be caught unprepared. The Repair Tool is essential for fixing hull breaches in your base and repairing damage to your vehicles. Spare batteries ensure that your tools and equipment remain operational, even on long expeditions.
• Use the Habitat Builder Wisely: The Habitat Builder can be used to create temporary safe zones and oxygen stations in dangerous areas. Place a foundation and a hatch to create a small shelter where you can replenish your oxygen and repair your vehicles. These temporary safe zones can be lifesavers when you're far from base and in danger.
• Scan Everything: Seriously, scan everything. New blueprints unlock new possibilities. The Scanner is your key to technological advancement. Scanning fragments of technology scattered throughout the seabed will unlock blueprints for advanced tools, vehicles, and habitat modules.
• Don't Be Afraid to Run: Sometimes, discretion is the better part of valor. If you encounter a dangerous creature, don't hesitate to flee. Survival is the name of the game. While combat is an option in Subnautica, it's often more efficient to avoid confrontation, especially in the early game. Knowing when to run is a crucial survival skill.

Final Thoughts

Surviving 100 days in Subnautica is a massive achievement. It requires planning, skill, and a bit of luck. But with this guide and a little perseverance, you'll be well on your way to conquering the depths. So, dive in, explore, and have fun! The underwater world of Subnautica is full of wonders and challenges, and surviving for 100 days is a testament to your resilience and adaptability. Remember to embrace the unknown, learn from your mistakes, and never give up. Good luck, and happy diving!