Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines, terraform voxel terrain, and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - All while trying to survive.
User reviews: Very Positive (1,493 reviews)
Release Date: 16 Dec, 2014

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Early Access Game

Get instant access and start playing; get involved with this game as it develops.

Note: This Early Access game is not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Some games are built inside boxes. No one can see inside the box, they can't enjoy the game while it is being built, and its strength depends completely on the skill of the people inside the box. Other games are made out in the open in full view, with countless people contributing to them in innumerable ways. They can be enjoyed while they are pieced together. At Unknown Worlds, we like making games in the open. It's more fun that way, and we think it makes better games.”

Approximately how long will this game be in Early Access?

“Subnautica will most probably be in Early Access for a significant portion, or most of 2015. There a reasonable chance that it will be longer, or shorter. Members of the Subnautica team have differing ideas about how what exactly will be done before Early Access finishes, and the scope of work to be done (and therefore time needed) will be heavily influenced by your feedback during the Early Access process.”

How is the full version planned to differ from the Early Access version?

“Early Access is a nucleus around which a better, bigger, and more fun game can form. Lots of the core elements of Subnautica gameplay are already in place. Over time the world will grow larger, deeper and more striking, creatures more diverse and intelligent, loot, crafting and vehicle construction more comprehensive, the story more fleshed out, and ecosystems richer and more vibrant . Large submarines, new unique life forms, and fantastic environments are all in production and will be introduced to Subnautica Early Access in updates.”

What is the current state of the Early Access version?

“Subnautica is absolutely playable and relatively stable right now. There is at least one hour of adventure content available for play right now. Before going on Early Access, Subnautica was publicly available and playable for two months. In this time, significant work was done to ensure that the game is in a state to stand up to the demands of Early Access.”

Will the game be priced differently during and after Early Access?

“Subnautica's price might go up, down, or stay the same during and after Early Access. We don't expect it to change, but the possibility is there.”

How are you planning on involving the Community in your development process?

“Open development is everything to Unknown Worlds. Here's how you can get involved in, influence, and be a part of Subnautica's development:

Production Tracking


Subnautica's production is tracked using a public Trello board, access it by clicking here. You can see and vote on tasks in real time.

Feedback System


Want to tell the development team something? Just fit F8 in game. You can give feedback in different categories, send screenshots, and more. It gets better: All feedback data are publicly available - View and download them by clicking here.

Changes & Checkins


See exactly what has been changed in and added to Subnautica, in real time, and for all history. Every checkin made by any member of the development team is available to view and download. Click here to see.

Experimental Branch


Subnautica gets an update, on average, every few weeks. If you want to get more involved in development, you can receive an unstable 'Experimental' branch twice per day. This is raw stuff: Experimental comes straight from out 'source repository' and receives no testing. Click here to find out how to access it.

Accessible Developers


There are a bunch of ways to tell the Subnautica development team what you think. Live chat rooms, public voice-chat play tests, twitter, forums, in-game feedback systems and more. All the ways to talk to the team are described in a handy Steam Guide.
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Buy Subnautica

CDN$ 21.99
 

Recommended By Curators

"An aggressively captivating underwater world. An onion of discovery and it's not even done yet!"

Recent updates View all (30)

29 March

Up Next: Crash Site



Here’s a peek at what will be coming to Subnautica in the next few weeks: The explosion and exploration of the Aurora starship.



Steam limits what we can embed in news posts. To see the full post, including interactive 3D models and SoundCloud files, go to the Subnautica Dev Blog

Back at in 2014, an extremely early prototype of Subnautica was shown at PAX East. A two dimensional starship, cut out from Cory's concept art, was placed on the ocean horizon. It was impossible to get closer to the ship, it would forever recede into the distance no matter how far a player swam.

Despite this a significant proportion of players would constantly swim across the surface towards the starship. They ignored objectives, vehicles, creatures, and even the whole undersea environment. There was something utterly compelling about the crashed Aurora, lying stricken on the sea floor.



At that time, there wasn’t a strong plan in place for what to do with the crashed ship. Various ideas were being tossed around, and continued to circulate even past Subnautica’s launch on Early Access. Approaches to the Aurora were cut off by deadly radiation fields, while we’ve figured out what to do with it.



Now, we’re ready to bring the Aurora into the game. In the past few weeks, crash site gameplay brainstorms have been category 5 hurricanes. Concept art, prototypes, gameplay ideas have all been flying around. The thing that most accurately describes what we’re thinking about is perhaps this sound made by Simon:

Boom

That’s the sound of a big starship going bang. When it goes bang, it will litter the sea-floor with debris, impact craters, and goodies formerly trapped inside the Aurora’s hull.



Michael, Jake, Russell and Oli are hard at work crafting the ocean floor at the Aurora crash site. This includes digging a huge impact trench out of the rock, and decorating it with debris, silt, and rubble. This represents a unique level design challenge, as it forces the mixing and disruption of existing biomes.



Some of the debris pieces on the sea floor will be large enough to enter and swim around in. Here’s a particularly large one:

Wreck Model



What of the deadly radiation field that currently prevents approach? You will soon be able to craft a radiation-resistant suit, capable of protecting you from pesky alpha, beta, and gamma rays. A new ‘paper-doll’ style inventory system will allow you to easily swap equipment, and know what you are wearing at a glance.



Radiation might be the least of your worries when swimming near the Aurora’s wreck. We don’t want to say too much – We’ll let this experimental video from Andi do the talking…

https://www.youtube.com/watch?v=5HY6S9uMnMs

This blog post can’t contain everything we’re working on at the moment. Heaps of stuff is being done, including the addition of new sea-base functionality, and rebalancing of loot/crafting mechanisms. To see more, check out the Subnautica development Trello board, and the checkin & changes list.

We can never be sure when we will release updates. The Crash Site might happen in one, two, or three weeks. It’s likely to be some time in April. Sign up to the Subnautica mailing list to find out the moment the update is released.

286 comments Read more

13 March

Seabases Released!



Subnautica now features underwater bases. They are available now, and allow the construction of habitats on the sea floor. Bases are composed of modular units such as compartments, windows, and hatches, bases allow you to create an outpost from which you can go forth and explore Subnautica's vast ocean.



Bases are the biggest new feature we've added to Subnautica since the Cyclops submarine. Like the Cyclops, bases are unfinished, buggy, and rough around the edges. Subnautica is an Early Access game, and we aim to give you the latest stuff well before it is truly 'finished' - Game development is more fun this way!

https://www.youtube.com/watch?v=Q-oa3bzir9A

Despite being incomplete, bases are tremendous fun to muck about with. To build a base, craft a Builder tool at a Fabricator. Then, right click while holding the tool. You will be presented with a crafting menu that offers various different base components.



Base construction requires lots of resources, particularly Titanium, so pick your site carefully. In the screenshots in this post, the bases have been built on sand in safer coral areas. You don't have to follow that lead: Bases can be built just about anywhere - Including inside caves!



There are a wide variety of base components to choose from, including L junctions, T junctions, X junctions, windows of various shapes and sizes, hatches, and foundations. Compartments can be stacked on top of each other and connected with ladders to create multiple decks.



When building bases, it is necessary to manage hull integrity. Placing lots of compartments, or weaker components like windows, lowers hull integrity. The effect is more pronounced the deeper the base is built, as water pressure increases. Placing hull reinforcements can increase hull strength, and allow the placement of more windows and hatches before hull integrity fails.



If your base has low hull integrity, it might flood. Flooding can be stopped by restoring hull integrity and repairing hull breaches. To restore hull integrity, place more reinforcements or remove weak components like windows. To repair hull breaches, use a Welder tool on the breach. Once all breaches have been repaired, the water will be drained by the base artificial intelligence.



Some base components, like Fabricators, require power. Place a power generator outside a base to give them the juice they need to function. If you don't have a power generator, you will see a big red 'Power' warning at the top of the head-up-display.



Remember: Bases are, like the rest of Subnautica, a work-in-progress. They will break frequently and sometimes with disastrous (or hilarious!) consequences for gameplay. This is the fun of Early Access, shaping a game over time rather than just throwing a finished product at people and hoping it works. Leave us feedback notes via the in-game F8 feedback system, talk to us on the forums, (here or on the dev blog!), Tweet at us, do whatever you can to tell us what you think. Your feedback will shape our work on bases, and help make them better and better as development continues!

135 comments Read more
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About This Game

Subnautica is an open world, underwater exploration and adventure game currently under construction at Unknown Worlds, the independent developer behind Natural Selection 2.

Dive Into a Vast Underwater World




After crash landing on an alien ocean world, the only way to go is down. Subnautica's oceans range from sun drenched shallow coral reefs to treacherous deep-sea trenches. Manage your oxygen supply as you explore Kelp Forests, plateaus, reefs, and winding cave systems. The water teems with life: Some of it helpful, much of it harmful.

Scavenge, Craft, and Survive




After waking up in your Life Pod, the clock is ticking to find water, food, and to develop the equipment you need to explore. Collect resources from the ocean around you. Craft knives, lights, diving gear and personal water craft. Venture deeper and further form to find rarer resources, allowing you to craft more advanced items.

Construct Underwater Habitats




Build bases on the sea floor. Choose layouts and components, and manage hull-integrity as depth and pressure increase. Use your base to store resources, park vehicles, and replenish oxygen supplies as you explore the vast ocean.

Disrupt the Food Chain




The ocean teems with life: Use the ecosystem to help you. Lure and distract a threatening creature with a fresh fish, or simply swim as fast as you can to avoid gnashing jaws of roaming predators.

Fear the Night




As the sun goes down, the predators come out. The ocean is unforgiving of those caught unawares in the darkness. Areas that are safe to explore during the day become treacherous at night, but also reveal a beauty that those who hide from the darkness will never see.

Shape the World




The Subnautica sea-floor is presented using a dynamic voxel terrain system. Dig caves to hide, store loot, or short-circuit cave systems. Impacts from vehicles, or even exploding creatures, will change the way the world looks.

Go Below The Deep




Cave systems wind below the sea bed, from dark claustrophobic passages to caverns lit by bio-luminescent life. Explore the world below the ocean floor, but watch your oxygen levels, and take care to avoid the threats lurking in the darkness.

Open Development




Get weekly or daily updates, see what the development team is working on, view real time change logs, and give feedback from inside the game. Subnautica Early Access development is open, and the development team wants to hear from you.

About the Development Team




Subnautica is being created by Unknown Worlds, a small studio founded by Charlie Cleveland and Max McGuire that traces its roots back to the 2003 Half-Life mod Natural Selection. The team is scattered around the globe, from the United States to the United Kingdom, France, the Czech Republic, Russia, Thailand, Australia, and many more places. There is a central office in San Francisco, California that serves as home base for the whole team.


System Requirements

    Minimum:
    • OS: Windows Vista SP2 or newer, 64-bit
    • Processor: Intel Haswell 2 cores / 4 threads @ 2.5Ghz or equivalent
    • Memory: 4 GB RAM
    • Graphics: Intel HD 4600 or equivalent
    • Hard Drive: 6 GB available space
    • Additional Notes: Subnautica is an Early Access game, and minimum specifications may change during development
    Recommended:
    • OS: Windows Vista SP2 or newer, 64-bit
    • Processor: Intel Haswell 4 cores / 4 threads @ 3.2Ghz or equivalent
    • Memory: 8 GB RAM
    • Graphics: Nvidia GTX 550 ti or equivalent
    • Hard Drive: 6 GB available space
    • Additional Notes: Subnautica is an Early Access game, and recommended specifications may change during development.
Helpful customer reviews
498 of 602 people (83%) found this review helpful
31 people found this review funny
5.4 hrs on record
Posted: 19 March
Early Access Review
The ocean is brighter than my future 420/10
Was this review helpful? Yes No Funny
118 of 121 people (98%) found this review helpful
1 person found this review funny
10.3 hrs on record
Posted: 22 March
Early Access Review
I have been burned by early access. Developers that spurn their own customers, and games that become vapourware.

On that note, I've been in a chat room, actively chatting to the developers and other players over the weekend, having only bought it on Saturday. I've never seen a dev team more engrossed in their own player base, from helping people with crash problems, to taking on board suggestions, to talking about planned features, they're completely open. There are stable releases every few weeks, and (three times a day) experimental developer builds to keep folks sated. I can without a doubt say that this game is made with passion, and as such, I think it'll go far.

The game itself? In its current state, it is highly enjoyable as an exploration game. I'm rarely one to enjoy a purely scenic experience, but with the sound design and asthetics, more often than not, I found myself just buildng a base somewhere pretty and pressing my face to the glass. There isn't a huge amount to do at the moment, collect resources, build the mini-sub, and larger submarine, build a base (though without much to put in it yet), considering this only came out on steam 4 months ago though, it's coming along at break neck speeds, and is astoundingly polished already.


I was worried I'd spend 2 hours and experience everything and be done with it, now I'm having to pull myself away less I spend another 5 hours today swimming around petting carnivorous fish.
Was this review helpful? Yes No Funny
133 of 158 people (84%) found this review helpful
21 people found this review funny
8.0 hrs on record
Posted: 2 April
Early Access Review
>Buy game
>Starts game
>Looks around
>Everythings Pretty
>catch fish and get salt
>eat fish
>decide to explore
>swimming on surface
>goes back down for a look
>sees open water with no land nearby
>lost
>freak out
>quit game out of fear of open water

1/-3 Would piss myself again.
Was this review helpful? Yes No Funny
65 of 69 people (94%) found this review helpful
3 people found this review funny
2.8 hrs on record
Posted: 21 March
Early Access Review
Okay. This game is gooood. Beautiful really, and easy to learn. Yeah, there a few minor bugs here and there, but it's fun, and that's what games are all about. Having fun.

I recommend it if you just wanna, ya know, relax underwater or get chased by angry fish.
Was this review helpful? Yes No Funny
75 of 94 people (80%) found this review helpful
3 people found this review funny
3.1 hrs on record
Posted: 20 March
Early Access Review
Two words:

Buy It.
Was this review helpful? Yes No Funny
49 of 57 people (86%) found this review helpful
1 person found this review funny
1.0 hrs on record
Posted: 22 March
Early Access Review
Amazing! This game is genius! Once you craft a knife and a builder, say good bye to an hour or more....

10/10 so far so good!
Was this review helpful? Yes No Funny
41 of 45 people (91%) found this review helpful
2 people found this review funny
2.7 hrs on record
Posted: 19 March
Early Access Review
Analysis

This game is first and foremost, absolutely beautiful. If I was pressed to come up with another term, I would have to go with pants-sh*ttingly terrifying. See that extremely useful pile of scrap metal at the mouth of that cave? Don't you dare try to pick it up unless you would like to permanently modify the scent of your computer chair.

And you better believe I'm going to keep playing it.

The game is fun, nice to look at, and much more unique than the other survival games that are currently bloating the shop. With the ability to construct your own bases and ships, survival is just the surface of the gameplay. Rarely do we get to experience a game that builds such a desire to explore. Just when you thought you've seen all the creatures this alien sea has to offer, you stumble across a cave full of entrancing pink jellyfish, or a monstrous horse-shoe-crab-whale.

With the recent addition of underwater bases, a little bit of my faith in early access games has been restored. As steam citizens, we are far too used to dissapointment while watching games develop (or... not develop?... starbound?), and this team shows promise. If you need a new game to put your faith in, try Subnautica.

Rating

Visual:
8.5/10
Although the textures could use some polishing, I absolutely love the overall appearance of the game and can not wait to see more areas and creatures added.

Audio:
7/10
The music does a great job of providing a sense of loneliness and inensity when necessary, but the transitions should be smoothed an dperhaps modified so the "intense" moments become less frequent, increasing the effectiveness.

Story:
-/10
There is a brief cutscene at the beginning regarding your ship crashing to the planet and you being the only survivor. Hopefully, the developers can come up with something a little bit more elaborate and original. That story seems like a placeholder, and as such, I will wait to post a score.

Was this review helpful? Yes No Funny
61 of 86 people (71%) found this review helpful
1 person found this review funny
2.8 hrs on record
Posted: 18 March
Early Access Review
The deep sea is a beautiful thing.
Was this review helpful? Yes No Funny
19 of 22 people (86%) found this review helpful
1 person found this review funny
12.5 hrs on record
Posted: 24 March
Early Access Review
I'm a bit of a graphics junkie - why else would I build overpriced rigs? So Subnautica struck me with it's colourful underwater world. For £15 I didn't really expect much other than a nice, relaxing timewaster. But hey, the devs might well be onto something here.

I was speaking to a friend earlier and he asked me what Subnautica was like. and I immediately thought of Minecraft. I'm not sure if the devs had Minecraft in mind when discussing the idea of Subnautica, but the intrigue that Minecraft has, of wanting to keep exploring and discovering is clear to see in Subnautica. The scavenging for items, construction of modular abodes, seeking out food and defending yourself against surreal creatures, is also hugely reminiscent of Minecraft.

And all these similarities are a good thing in my opinion. I'm no Minecraft fanatic, although I did enjoy approximately 20+ hours of it some while ago. And Subnautica has that same intrigue, albeit in a nicer looking environment. I've no idea if I'll tire of it oneday, for no reason, like I did Minecraft, but for now (after 11 hours), I'm really enjoying it.

I hope the devs continue to work hard on what could be the next big thing.
Was this review helpful? Yes No Funny
16 of 18 people (89%) found this review helpful
3 people found this review funny
16.7 hrs on record
Posted: 23 March
Early Access Review
Love the game so much. has lots of stuff to do and if you run out of stuff to do you can just swim around and look at the beautiful sea floors
Was this review helpful? Yes No Funny
13 of 13 people (100%) found this review helpful
8.2 hrs on record
Posted: 24 March
Early Access Review
Subnautica is a joyful, outstanding and long-time motivating game. Concerning the fauna and flora this title is detailled and plausibly modeled. In combination with the great matching sound effects and music Subnautica develops a unique atmosphere that you will find only in a few other games e.g. Metroid Prime (GCN)/Super Metroid (SNES) or Treasures of the Deep (PS1).

On daytime (in the game) it is a pleasure to discover the underwater world, collect and store materials and use them later to produce items in your safety capsule. Later on you will be enabled to build your own submarines and underwater base. In the early stage the capsule seems to be the one and only place were you can feel safe. Especially when night time approaches your mood changes radically. It is harmful out there. During night time I always develop goose bumbs because of the shock effect when suddenly a creature appears and bites you. You can hardly await for the next daytime to feel safe and carry on your discovery journey or make screenshots ;).

When playing Subnautica you will forget the time. When you loved Treasures of the Deep you will love this game too.
Even though it is an "early access" title it plays very smooth. Yes, it has got some bugs like crashes. When loading a saved game to continue gaming it crashes often on my machine (Lenovo W540 mobile workstation, playing in full graphics quality and highest resulution). Regarding drawbacks I have noticed some minor collision problems with objects when interacting with the environment (polygon intersection). Another deficit of this game is that within the actual build no missions are included like they are in Treasures of the Deep. But the dev-time is still in the design phase and maybe they will implement quests etc.

What is very interesting (when I noticed right) is the fact that each time you start a new game from the beginning (no save game) the topology of the ocean, position where items are placed and your start equipement is diffrent from the last one. Which is cool and an additional motivating factor of this game.

Hovewer in this early stage Subnautica makes a strong impression, especially in technical atmospheric context, and makes great value of your money spend for this game.
08/10

For the final build I would be very happy to have the opportunity ... :
- to load my own models/maps into the game or
- have an editor to design them by my own,
- quests are warmly welcome,
- grow my own see food on the ground of the ocean,
- more usage of the digging/terra morphing ability.
Was this review helpful? Yes No Funny
14 of 15 people (93%) found this review helpful
1 person found this review funny
10.3 hrs on record
Posted: 7 April
Early Access Review
Day 1: No survivors i am alone at sea, the creatures around me are nothing like i have seen before.
Day 2: When exploring the depths i found some wreckage i could use to make the tools i need, there also was a sound so loud i felt it troughout my whole body..
Day 3: I found fragments of the Cyclops, now i just need some more resources before i can craft it.
Day 4: The Cyclops is ready now i can investigate where the sound is coming from.
Day 5: There is something out here... the Cyclops.. i don't think it can protect me from it...
Was this review helpful? Yes No Funny
13 of 14 people (93%) found this review helpful
1 person found this review funny
6.3 hrs on record
Posted: 22 March
Early Access Review
cool game but IN EARLY DEVELOPMENT played for two hours made an underwater base and little sea moth ship went to 100m game crashed lost my save... made me not want to play again until fixed but very fun and not developers fault because the game is in early access so problems should be expected. Otherwise had lots of fun and from where it stands now with all the stuff in it and it’s not even done will be a very fun and time consuming game.

Rest in pepperonis 2 hours of life
Was this review helpful? Yes No Funny
14 of 17 people (82%) found this review helpful
0.8 hrs on record
Posted: 2 April
Early Access Review
What I find great about this game is that its not even released, but looks amazing and with these regular updates keeps getting better and better. I'll admit at first I worried the whole under water exploration/survival might get old, but I keep finding interesting things to do and did I mention BASE BUILDING!?!?! how freaking fun and cool. At the pace this game is going with content and functionality I cannot wait to see what they consider as the Release version.
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10 of 10 people (100%) found this review helpful
7.2 hrs on record
Posted: 21 March
Early Access Review
I have played a few hours on this game and for a game still in development it is oustanding! The game is absolutely beautiful and you, quite literally, have a whole ocean to explore and build in. The recent implimentation of the Cyclops submarine is quite amazing... you can even dock your small, one-man Seamoth sub inside it and you can customise the Cyclops with a few gadgets. Cool little feature: if you damage it too much the interior slowly starts to flood and you have a race against time to fix it before you run out of air. (Game within a game!)

Invest in this game!
It's far and few when it comes to finding a game that's doing this well so early. It's a procedurally generated, open-world, survival (optional), sandbox game. I can only imagine the amount of mods that will come out of this and I hope to see the opertunity for co-op gameplay sometime in the future. 9.5/10
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9 of 9 people (100%) found this review helpful
3.0 hrs on record
Posted: 22 March
Early Access Review
I havent played this game long. I already love it. Very easy to learn, beautiful graphics and very fun to explore. Happy I bought this!
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8 of 8 people (100%) found this review helpful
9.5 hrs on record
Posted: 22 March
Early Access Review
Great Game, its really good and its been out in alpha for for a very short time. If you like underweater life or event open world games, then this is for you. Keep in mind that its still an alpha, but I would say this. This is the best aplha game Ive ever played, and I love the concept and everything about it.
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9 of 10 people (90%) found this review helpful
1 person found this review funny
1.0 hrs on record
Posted: 23 March
Early Access Review
So far great game.
almost made me forget i had trypophobia untill i went into some sort of cavern.
10/10 cant sleep or play this ever again.
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6 of 7 people (86%) found this review helpful
8.1 hrs on record
Posted: 23 March
Early Access Review
This game is amazing.

Very atmospheric, for the first time since many years I rediscover this feeling again.
The dev team are very present with their custommer their are working hard and listening to our idea.
Can't wait to try this with the occulus.
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5 of 6 people (83%) found this review helpful
1 person found this review funny
45.1 hrs on record
Posted: 23 March
Early Access Review
Graphics are spot on 3d realm smooth as ever seen a game that runs smooth this it!
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