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Subnautica Security Hotfix

Oct 3, 2025

We have released a hotfix that addresses a security-related concern raised to us by Unity. You can read more about the specific issue here: https://unity.com/security/sept-2025-01/

While the update patches out the flaw, Unity has said that, to their knowledge, no one has exploited the issue to date, and no players have been at risk.

To help ensure that this security flaw can never be exploited on Subnautica or Below Zero, we have updated Unity following the guidelines provided. We have also had to make the difficult decision to disable all legacy and alternative branches of Subnautica and Below Zero, as there is no way for us to patch out the security issue on each of those branches individually.

If you play Subnautica or Below Zero with any mods on our legacy or alternative branches, you should disable or remove them before launching the game after the update to preserve your save files. You will need to check that the mods you want to play are updated to work with the most recent version of the game.

For our speedrunning community, this also means that the speedrunners branch has been disabled. We understand that this will affect speedruns moving forward, but the security and safety of all our players is our highest priority.

Thank you for all your continued support for Subnautica and Below Zero!

Keep Diving.

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Subnautica 2025 Patch

Aug 12, 2025

We’re excited today to release a new patch for Subnautica!

Thanks to some of the incredible development done on the mobile version of Subnautica, we were able to port that work across to other versions of the game.

This update will roll out worldwide and might take some time to appear across the globe.

Change Log

PC & Console

Added a pop-up newsfeed that can be used for one-time-only announcements.
Fixed an issue where passing through the Alien Arch portals (e.g. in the Primary Containment Facility) in your PRAWN suit freezes stats like oxygen or hunger, if you exited the suit.
Fixed the PRAWN suit sometimes falling through the map or getting stuck when the player returns from an Alien Arch portal.
Fixed Leviathans having a tendency to fly above the ocean surface when grabbing the Seamoth or PRAWN suit in certain cases.
Fixed having a permanent player view rotation offset upon respawning, if the player died while piloting the Scanner Room Camera Drone.
Fixed the game freezing if a player managed to construct a SeaBase piece inside of the Cyclops. It is now recognized as an obstacle for base building.
Fixed a bug where the Repulsion Cannon could displace objects built inside the Cyclops, causing them to fall outside of it and sometimes disappearing into the sea floor.

PC Only (Excluding Windows Store)

Changed from legacy Unity input to the new “com.unity.inputsystem” to accommodate controller improvements.
Fixed a bunch of controller related issues.
- Reworked input options.
- Various InputSystem related fixes and performance optimizations.
- The game now properly supports the following controllers in both wired and wireless modes: Xbox 360, Xbox Series, PS4, PS5, PS5 Edge, Nintendo Switch Pro.
Changed to the new Unity Sprite Atlas packer (backport from Below Zero).
Changed from baked InputSymbols.ttf to SDF sprites for displaying inline control icons in text.
- Updated control icons.
- Fixed game falling back to text representation of controls instead of control icons for some input bindings when no controller is connected.
Fixed navigation icons in PDA and Builder Menu not updating bindings dynamically when they change (e.g. when controller type changes).
Fixed an issue where the user cannot toggle the 'auto move' setting to On while cycling through Cyclops' cameras.
Made Cyclops steering wheel animations gamepad-friendly.

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Subnautica 2 Early Access Coming 2025

Oct 17, 2024

We’re thrilled today to unveil the first teaser trailer for Subnautica 2 and announce that we’ll be heading to Early Access in 2025! 🥳

https://www.youtube.com/watch?v=WS0vTRl_2PQ

Store pages are now live and you can wishlist Subnautica 2 on Steam. Our goal has always been to bring Early Access to as many of our community as possible, and we’re excited to develop Subnautica 2 from the start alongside more of you than ever before!

Keen eyed Subnauts might have also noticed that we’ve given our profiles across the web a bit of an update. See if you can uncover all of the new details. Some are a little easier to spot than others 👀

And if you want to speculate about everything we revealed today, a new Discord channel specifically for Subnautica 2 is now available. Just head over and join the community[discord.gg] to get involved!

We’re excited to share more of what the team has been working on as we build up to the release of Early Access next year.

Keep Diving!

https://store.steampowered.com/app/1962700/Subnautica_2/

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Steam Deck Update Released!

Mar 7, 2023

Hi Subnauts,

We’re thrilled to release an update today for Subnautica on Steam to improve compatibility with the Steam Deck.

You’ll notice that Subnautica is now marked as ‘Verified’ on the Steam Store, which means that the game should work seamlessly when you play it on the Steam Deck.

Here are some of the improvements the team made to bring the Steam Deck compatibility update to life!

Patch Notes

Steam SDK upgrade
Steamworks .NET upgraded to 20.1.0
Virtual Keyboard support for Steam Big Picture mode
Fixed wrong controller stick dead zones handling (now should be easier to aim using controller)
Fixed occasional black screen on game start
Refactoring, other fixes and UX improvements (mostly related to controllers)
Fixed black screen in VR after resolution change

We hope these changes will make your Subnautica experience on Steam and the Steam Deck even better than ever!

Keep diving,
Unknown Worlds

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Subnautica Living Large Update

Dec 13, 2022

Hello Subnauts,

We’re delighted to bring you the long-awaited 2.0 update to Subnautica across all platforms.

This update has been a labor of love for the entire Subnautica team. As you might have seen in some of our previous blog posts, a lot of time has been spent addressing a ton of tech debt and bringing across some improved code from Below Zero.

Our goal was always to bring both Subnautica and Below Zero onto unified versions of Unity, and with today’s update, that goal has been achieved. By doing this, we’ve been able to implement several quality of life features, fix many outstanding bugs, and introduce some performance improvements that were already available in Below Zero.

We’ve also added some base pieces to Subnautica that were previously only available in Below Zero, specifically the Large Room, Glass Dome, and surface hatches. Now you can make your bases even more epic than before!

On top of these changes, we’ve also refactored and optimized our save system, which means it’s now even faster and more reliable to save and retrieve your save.
Other additions include:

Adding the TextMeshPro plugin, to improve UI readability and visual quality
Adding an ‘Unstuck’ button to the menu to help get you out of some sticky situations
Bringing over PDA pause, the ability to disable light flashes, and item bars from Below Zero

As for bug fixes, we’ve closed out over 800 in total, including multiple issues related to base building (server clipping, deconstructing buildings whilst inside them), vehicle navigation and piloting.

If you’re not quite ready to move to the new update, because you’re using mods on your save file or otherwise, you can also roll back to the ‘legacy’ beta on Steam to continue playing. Just head to ‘Properties,’ then ‘Betas,’ and choose ‘legacy’ from the drop down. You should do this before you open your save file to play.

We really hope that all of these changes make your Subnautica experience even better than ever! And as some eagle-eyed fans might have spotted, we might have some more exciting news for you in the new year.

But for now, enjoy, and happy diving!
Unknown Worlds

PATCH NOTES

All Platforms

Improved font rendering to increase UI readability and visual quality
Adds accessibility features: UI scaling, PDA pause, option to disable light flashes
Item bars
Adds pinned recipes
Adds run mode
Improved Air Bladder functionality
Adds the Large Room and Glass Dome base pieces from Subnautica: Below Zero
Adds Land Hatches from Subnautica: Below Zero
Pings are now visible when piloting the Cyclops
Save system improvements
Improved performance
Improved subtitles sync
Loading screen improvements
Intro skipping improvements
Various performance optimizations
Improved control mapping, for things like transferring items between inventory and storage
Fixed some creatures not spawning properly
Fixes for some VFX issues
Fixed multiple terrain streaming issues (vehicles/items falling through)
Fixed multiple issues related to base-building, vehicles
Fixes for many possible photosensitive issues
…And many more various bug fixes!

Changed how the dev menu is accessed to SHIFT + `
Fixed jittery movement on land
Less likely to get stuck in Alien Bases while operating the Prawn
Added an option to limit FPS
Added Cloud Save Support
Legacy Steam branch for Mod Integrity
Fixed VR frame lag in PDA UI screen movement
Fixed a VR issue with player orientation being slanted in some scenarios
Fixed Sunbeam countdown timer not showing up in VR
Fixed VR Main Menu prompts on selecting and interacting with the menu

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Minor Update B89 Released

Dec 7, 2021

This update changes the troubleshooting guide from being hosted on Steam to being hosted on our blog[unknownworlds.com].

Curious about our plans for Subnautica? Read our blog "What's Next for the Subnautica Series?"[unknownworlds.com]

Sign up to the Development Newsletter[unknownworlds.com] to receive word every time an update is released. You can also:

See update sneak peaks by following @Subnautica on Twitter
Get live source code changes by following @SubnauticaSCM on Twitter
See update news on Facebook[facebook.com]
Watch update summary videos on YouTube
Satisfy underwater Instagram craving by following @Subnautica[instagram.com]
See our task lists & milestones on Favro[favro.com]
Chat with fellow divers in the Subnautica Discord[discordapp.com] server

Happy diving!

- Unknown Worlds

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Subnautica Original Soundtrack Released

Apr 30, 2021

For the first time, the original Subnautica soundtrack is available to purchase from Steam.

To make the soundtrack more readily available, we've moved the soundtrack from the game itself to additional content. If you already own a copy of Subnautica on Steam, you will automatically be credited with a free copy of the soundtrack to download. You can find and download this directly from the game listing in your Steam Library.

Additionally, for the next seven days, any purchase of Subnautica on Steam will also come with the soundtrack. After that, it will be available to purchase for $9.99.

Enjoy, and happy diving!

- Unknown Worlds

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Below Zero Seaworthy Update

Feb 25, 2021

A new update is available for Subnautica: Below Zero Early Access. Visit the Seaworthy site[unknownworlds.com] to learn more!

Uncover the mysteries of the all-new, fully voiced Crashed Ship story
Enjoy the finalized soundtrack as you travel biome-to-biome
Utilize the improved Prawn Suit controls throughout your adventuring
Experience our most stable version of the game to-date with even more bug fixes
Check out the added gamepad and rumble support

https://youtu.be/yX5Lkk0iPU0

Crashed Ship Story

Have you ever found yourself wondering about the crew of the Mercury II whilst you trawl the wreckage scattered across the ocean floor? Wonder no more! You can now discover fully-voiced logs in the Mercury II wrecks that will provide more insight into the crew aboard... and their fate.

Completely Integrated Soundtrack

Below Zero's soundtrack, composed by Ben Prunty, is now fully integrated in-game. Every biome now features a rich and atmospheric track to deepen your immersion in the world of 4546B!

Prawn Suit Improvements

The Prawn Suit has more maneuverability than ever before with the addition of a horizontal boost, as well as improvements and refinement to existing Prawn Suit upgrade modules, such as the Torpedo Arm.

Bug Squashing

Thanks to all of your incredible feedback and bug reporting, the team has been hard at work squashing bugs for this latest release. With the Seaworthy update, you'll be able to play the most stable version of the game yet!

New Loading Bar

What's that waddling across the bottom of your screen? While you wait for Below Zero to load, a cute little Pengling will walk along the loading bar. It may stumble a few times, but don't worry, no Penglings were harmed during the loading process!

Steam Cloud

With this final Early Access update, we're bringing Steam Cloud support to Below Zero. You can utilize Steam Cloud to upload your saved games and download it to any computer with the same Steam account upon launching the game. So, if you need to move from computer-to-computer, taking your lived in saves with you has never been easier.
Note: If you have local save games on multiple computers, we recommend disabling Steam Cloud and manually merging your files before syncing.

Gamepad and Rumble Support

Below Zero now has added gamepad support. If you prefer to traverse the waters of 4546B using the gamepad of your choice, it should now provide a seamless experience. Rumble support is also available for Xbox controllers only.

1.0 Release Date

Oh, and we have just one more little announcement: Subnautica: Below Zero is coming to all platforms on May 14th! We want to extend our thanks to all Subnauts for your patience as we finalized the release date. We can't wait to bring the game to everyone playing on PC and console. And once again, we appreciate all of your support and feedback throughout the Early Access process.

Follow Below Zero development

You can find out about upcoming updates in all sorts of ways. Sign up to the Development Newsletter[unknownworlds.com] to receive word every time an update is released. Follow the Unknown Worlds and Subnautica: Below Zero Steam groups to get a notification on Steam. You can also:

See update sneak peaks by following @Subnautica on Twitter
Get live source code changes by following @SubnauticaSCM on Twitter
See update news on Facebook[facebook.com]
Watch update summary videos on YouTube
Satisfy underwater Instagram craving by following @Subnautica[instagram.com]
See our task lists & milestones on Favro[favro.com]
Chat with fellow divers in the Subnautica Discord[discordapp.com] server

Enjoy, and happy diving!

- Unknown Worlds
https://store.steampowered.com/app/848450/Subnautica_Below_Zero/

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Below Zero Relics of the Past Update

Oct 29, 2020

A new update is available for Subnautica: Below Zero Early Access. Visit the Relics of the Past site[unknownworlds.com] to learn more!

Experience Below Zero’s story in its most complete form, now fully voiced!
Check out Robin’s revamped look with a new Dive Suit and model
Unlock more alien mysteries in the Precursor Caches
Discover new world details, including artwork from the community
Venture to the edge of the world and encounter the vicious Void Chelicerate
Optionally pause your game when the PDA is open

https://youtu.be/YKoHTbvV188

Complete and Fully Voiced Story

Play through Below Zero from start to (almost) finish, with the most complete version of the story to date. With voice acting fully implemented, rich lore to be discovered through the PDA logs, encyclopedia entries, and databanks, as well as additional art assets, the truth of what happened to Sam and on Planet 4546B prior to your arrival is waiting for you. With voices implemented, we also recommend starting a new game, though old save files are still compatible with this update.

Updated Robin Model

Robin has a new look from head-to-fin with a sleek Xenoworx Dive Suit to wear, sporting a revamped hairstyle, as well as updates to the face model. Arctic survival has never looked better.

Void Chelicerate

Venture if you dare to the edge of the world, where a new Leviathan is awaiting your arrival. A rare mutation of the Chelicerates you might have uncovered on your journey, the Void Chelicerate is a hulking, aggressive creature that does not take kindly to your intrusion.

Precursor Caches

Uncover further secrets of the mysterious and ancient Architects in the Precursor Caches. Who knows what you might find as you explore these eerie and abandoned areas of the planet.

Beacons Drop on Death

Did you meet an unfortunate end on your journey across Planet 4546B? Make sure to carry a Beacon in your inventory, as it will drop on your death, ensuring a somewhat smooth rediscovery of your last known location, as well as assist with reclaiming any lost items.

PDA Pause

Found in the Accessibility menu, this opt-in feature will pause your game whenever the PDA is open. Now you can read through your PDA at leisure and never worry about running out of oxygen or getting hypothermia.

World Details and Polish

Traverse the intro area to discover additional details and revisions, unlock decorative items designed by the Subnautica community, and much more, with the latest rounds of polish to the game. There’s plenty to uncover and revisit, giving a fresh and rich experience for all players.

Follow Below Zero development

See update sneak peaks by following @Subnautica on Twitter
Get live source code changes by following @SubnauticaSCM on Twitter
See update news on Facebook[facebook.com]
Watch update summary videos on YouTube
Satisfy underwater Instagram craving by following @Subnautica[instagram.com]
See our task lists & milestones on Favro[favro.com]
Chat with fellow divers in the Subnautica Discord[discordapp.com] server

Enjoy, and happy diving!

- Unknown Worlds
https://store.steampowered.com/app/848450/Subnautica_Below_Zero/

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Below Zero Stranger Pings Update

Aug 13, 2020

A new update is available for Subnautica: Below Zero Early Access. Mystery awaits you in Stranger Pings. Investigate the abandoned Alterra bases, unlock new base decorations, experience new creature behaviors, and much more. Visit the Stranger Pings site[unknownworlds.com] to learn more!

Dig deeper into the mysteries of 4546B with new character portraits and base detailing
Decorate and personalize your base with new props and stairs for surface bases
Enjoy a smoother ride – with significantly less pop-in – thanks to improved grass and terrain fading technology
Discover further detail and polish work in Deep Lilypads and Iceberg Zone
Experience new creature behaviors, including Rock Puncher improvements
Utilize the Object Highlighting accessibility option to showcase interactable items

https://youtu.be/KNyR2yAlv_8

Alterra Base Polish

As you investigate the abandoned Alterra bases on 4546B, you will now uncover additional environmental storytelling. Learn more about the scientists that lived and worked on the planet prior to your arrival, ranging from unlockable employee profiles, to personal items and decor. It’s even easier to know which base you’ve arrived at too, with symbols and name plates added to the exterior!

Base Decorations

Add a touch more personalization to your own bases after you root through the Alterra labs, with the futuristic Executive Toy, a calming Aromatherapy Lamp, as well as stairs for your surface bases.

Artifact Pings

Never lose an Artifact in the world again! A Precursor symbol will now accompany any Artifact locations on the planet, which can all be managed through your trusty PDA.

Known Issue: PDA Unlocks

PDAs that you have previously collected during your playthrough may reappear with this update. If you have already unlocked them, you will not be able to pick it up again. We are working on a solution for the next update.

Biome Detail and Polish

Further detail and polish work has been added to Deep Lilypads and the Iceberg Zone. Revisit these impressive biomes to discover just how rich and vivid the world is becoming.

Creature Behaviors

The behaviors of several creatures that inhabit the vast waters of the planet have been revamped with this update. The Rock Puncher now trawls the ocean floor in search of sustenance, which also unearths resources that you can pick through. Squidsharks utilize a new lightning attack to chase away any threats. Other creatures have also seen updates to their pathing and animations, so make sure you get out in the world and interact with them... if you dare.

Object Highlighting

This feature can be found under the new Accessibility section of the menu. With a selection of colors to choose from, you’ll be able to highlight objects in the world that you can interact with.

Follow Below Zero development

See update sneak peaks by following @Subnautica on Twitter
Get live source code changes by following @SubnauticaSCM on Twitter
See update news on Facebook[facebook.com]
Watch update summary videos on YouTube
Satisfy underwater Instagram craving by following @Subnautica[instagram.com]
See our task lists & milestones on Favro[favro.com]
Chat with fellow divers in the Subnautica Discord[discordapp.com] server

Enjoy, and happy diving!

- Unknown Worlds
https://store.steampowered.com/app/848450/Subnautica_Below_Zero/

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