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Hello Subnauts,
With Subnautica 2's Early Access launch on the horizon, we're hosting a Free Weekend for Subnautica, the game that started it all. From April 2nd at 10:00 AM PT through April 6th at 9:59 AM PT, you can play Subnautica for free.
If you haven't explored the vast oceans of Planet 4546B yet, or you want to invite a friend to try it out, now is the perfect time!
What’s waiting for you in Subnautica
Explore a vast and immersive alien ocean
Unravel the mysteries hidden within an ancient alien world
Discover unique creatures and diverse ecosystems
Build underwater bases and craft tools to survive
Interested? Play Subnautica for free from April 2nd.
Subnautica & Below Zero - 75% Off
Enjoyed your time exploring and surviving on Planet 4546B? You can continue your adventure with a purchase!
Both Subnautica and Subnautica: Below Zero are on sale at 75% off. The sale period runs from April 2nd, 10:00 AM PT until April 9th, 9:59 AM PT.
And an even bigger adventure is on its way!
In Subnautica 2, you’ll get to explore an all-new alien world, either alone or with up to three friends (four players total) in optional co-operative multiplayer. Built on Unreal Engine 5, it brings enhanced visuals, new creatures, and new mysteries waiting to be uncovered.
Wishlist Subnautica 2 now and be the first to know when Early Access launches.
This Free Weekend is a time-limited promotion. A purchase is required to continue playing after it ends.
Progress made during the Free Weekend is saved via Steam Cloud Saves.
Save data cannot be transferred between platforms. Achievements are tied to your platform profile and will carry over from the Free Weekend if you purchase the game.
Keep Diving!
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.
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.
About
This page aggregates Steam news feeds, patch notes, and developer announcements for Subnautica, sourced from official Steam community posts.
Major updates, balance changes, and seasonal events often correlate with player-count spikes — cross-reference announcements here with the live charts on the main Subnautica statistics page.
Articles link back to Steam for full changelogs. SteamScope refreshes news entries as new posts are published to the game's Steam hub.