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Watch trailer on Steam ↗Subnautica: Below Zero
Unknown Worlds Entertainment · Published by Unknown Worlds Entertainment · Official site ↗
Very Positive — 90% positive (108,503 reviews) · 13 achievements
Last updated 27 Sept 2026
Dive into a freezing underwater adventure on an alien planet. Below Zero is set two years after the original Subnautica. Return to Planet 4546B to uncover the truth behind a deadly cover-up. Survive by building habitats, crafting tools, & diving deeper into the world of Subnautica.
-75%
£6.49
£25.99Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
£6.49£25.99
Price history
3 Sept 2026Lowest: £6.49 · Highest: £6.499 Oct 2026
Adventure, Indie · 2021 · More £5 - £15 games
Discover the icy secrets of Planet 4546B two years after Subnautica's events. Craft tools, construct shelters, and dive into an adventure filled with danger and mystery.
About this game
Below Zero is an underwater adventure game set on an alien ocean world. It is the next chapter in the Subnautica universe and is developed by Unknown Worlds.
Submerge yourself in an all-new, sub-zero expedition in an arctic region of Planet 4546B. Arriving with little more than your wits and some survival equipment, you set out to investigate what happened to your sister...
Alterra left in a hurry after a mysterious incident. Abandoned research stations dot the region. What happened to the scientists who lived and worked here? Logs, items, and databanks scattered among the debris paint a new picture of the incident. With limited resources, you must improvise to survive on your own.
Swim beneath the blue-lit, arching expanses of Twisty Bridges. Become mesmerized by the glittering, mammoth crystals of the Crystal Caverns. Clamber up snow covered peaks and venture into the icy caves of Glacial Basin. Maneuver between erupting Thermal Vents to discover ancient alien artifacts. Below Zero presents entirely new environments for you to survive, study, and explore.
Survive the harsh climate by constructing extensive habitats, scavenging for resources, and crafting equipment. Blast across the snowy tundra on a Snowfox hoverbike. Cruise through enchanting and perilous biomes in your modular Seatruck.
Something undiscovered lurks around every corner. Swim through the giant Titan Holefish, encounter the haunting Shadow Leviathan, and visit the adorable Pengwings. Keep your wits about you. Not all creatures in this strange world are friendly.
Jump in, the water’s warm. The below zero temperatures of this arctic region pose a new threat. New weather conditions blanket above-ground habitats. Craft a toasty cold suit, sip on piping hot coffee, and warm up next to Thermal Lilies to stave off the chill.
What really happened to your sister? Who were the aliens who came here before? Why were they on this planet? Can we find solace from grief in truth? Below Zero extends the story of the Subnautica universe, diving deep into the mystery introduced in the original game.
Below Zero is created by Unknown Worlds, a small studio that traces its roots back to the 2002 Half-Life mod Natural Selection. It is the same studio that created the original Subnautica. The team is scattered around the globe, from the United States to the United Kingdom, France, Russia, Austria, Australia, Canada, and many more places.
This game contains flashing lights that may make it unsuitable for people with photosensitive epilepsy or other photosensitive conditions. Player discretion is advised.
Return to planet 4546B
Submerge yourself in an all-new, sub-zero expedition in an arctic region of Planet 4546B. Arriving with little more than your wits and some survival equipment, you set out to investigate what happened to your sister...
Uncover the truth
Alterra left in a hurry after a mysterious incident. Abandoned research stations dot the region. What happened to the scientists who lived and worked here? Logs, items, and databanks scattered among the debris paint a new picture of the incident. With limited resources, you must improvise to survive on your own.
Discover uncharted biomes
Swim beneath the blue-lit, arching expanses of Twisty Bridges. Become mesmerized by the glittering, mammoth crystals of the Crystal Caverns. Clamber up snow covered peaks and venture into the icy caves of Glacial Basin. Maneuver between erupting Thermal Vents to discover ancient alien artifacts. Below Zero presents entirely new environments for you to survive, study, and explore.
Construct habitats and vehicles
Survive the harsh climate by constructing extensive habitats, scavenging for resources, and crafting equipment. Blast across the snowy tundra on a Snowfox hoverbike. Cruise through enchanting and perilous biomes in your modular Seatruck.
Research alien lifeforms
Something undiscovered lurks around every corner. Swim through the giant Titan Holefish, encounter the haunting Shadow Leviathan, and visit the adorable Pengwings. Keep your wits about you. Not all creatures in this strange world are friendly.
Survive the chilly temperatures
Jump in, the water’s warm. The below zero temperatures of this arctic region pose a new threat. New weather conditions blanket above-ground habitats. Craft a toasty cold suit, sip on piping hot coffee, and warm up next to Thermal Lilies to stave off the chill.
An ocean of intrigue
What really happened to your sister? Who were the aliens who came here before? Why were they on this planet? Can we find solace from grief in truth? Below Zero extends the story of the Subnautica universe, diving deep into the mystery introduced in the original game.
About the development team
Below Zero is created by Unknown Worlds, a small studio that traces its roots back to the 2002 Half-Life mod Natural Selection. It is the same studio that created the original Subnautica. The team is scattered around the globe, from the United States to the United Kingdom, France, Russia, Austria, Australia, Canada, and many more places.
Warning
This game contains flashing lights that may make it unsuitable for people with photosensitive epilepsy or other photosensitive conditions. Player discretion is advised.
System Requirements
Will my PC run this? →Minimum
Minimum:
- Requires a 64-bit processor and operating system
- OS *: Windows 7 64-bit
- Processor: Intel Core i3 4XXX series / AMD Ryzen 3 2.6ghz+
- Memory: 8 GB RAM
- Graphics: Intel HD 530 or better
- DirectX: Version 11
- Storage: 15 GB available space
Recommended
Recommended:
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Intel Core i5 4XXX series/ AMD Ryzen 5 @ 3Ghz +
- Memory: 8 GB RAM
- Graphics: Nvidia 1050 Ti / AMD Radeon 570, 4GB VRAM
- DirectX: Version 11
- Storage: 15 GB available space
Supported Languages
English*, French, Italian, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Spanish - Latin America, Russian, Simplified Chinese, Turkish, Ukrainian, Czech, Finnish, Hungarian, Polish, Traditional Chinese, Slovak
*languages with full audio support
*languages with full audio support
Latest news
Press Coverage
Steam Global Top Sellers for week of 12 May — 19 May 2026
* Subnautica 2; * Forza Horizon 6; * Subnautica; * Diablo® IV; * LEGO® Batman™: Legacy of the Dark Knight; * Battlefield™ 6; * Red Dead Redemption 2; * Subnautica: Below Zero; * NBA 2K26; * Gamble With Your Friends; * excluding free to play games View top 100 on SteamDBRead full article on SteamDB (SteamDB)AnnouncementsOfficial
Subnautica Free Weekend & Series Sale
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 oceanUnravel the mysteries hidden within an ancient alien worldDiscover unique creatures and diverse ecosystemsBuild underwater bases and craft tools to surviveInterested? 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. Subnautica 2 Store Page 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!Read full article on Community Announcements (virtualdon)Patch NotesOfficial
Below Zero Security Hotfix
We have released a hotfix today 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.Read full article on Community Announcements (virtualdon)Patch NotesOfficial
Below Zero 2025 Patch
We’ve just released a brand new patch full of bug fixes and improvements for Below Zero! This update will roll out worldwide and might take some time to appear across the globe. PC & Console Added a pop-up newsfeed that can be used for one-time-only announcements.Fixed a rare bug that would stop the game world from streaming in and make the game unresponsive when attempting to save in some cases.Fixed the Ice Worm always damaging the Vehicle/Snowfox/Player from any distance.Changed the chance of knocking the player off of the Snowfox when taking damage from the Ice Worm from 100% to 25% to make the encounter less frustrating..Changed the Snowfox's collider to make it less annoying to drive by, greatly reducing the amount it can get stuck on obstacles and props.Changed the orientation of the Snowfox when deployed to now properly face the same direction as the player to make it easier to mount in a hurry.Changed the Snowfox's damage from terrain impact from 100% to 12%, to not need as many repairs from just driving.Fixed when the Ice Worm pushed the Snowfox it would only trigger a cooldown to the physical push but not damage and knock off.Fixed the Snowfox occasionally falling inside the terrain and disappearing forever when deploying it.Fixed the "lightning flashes" accessibility option preventing the Repair Tool from using power when it was unchecked.Changed the main menu on all platforms by removing the merchandise store banner.Fixed the texture filter quality to use Bilinear for some sprites on the Blueprints PDA tab. PC only (excluding Windows Store)Fixed gamepad selection indicator being visible after switching from gamepad to keyboard and mouse.Read full article on Community Announcements (virtualdon)AnnouncementsOfficial
Subnautica 2 Early Access Coming 2025
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 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/Read full article on Community Announcements (DamJess)
