Subnautica: Below Zero

Subnautica: Below Zero

Unknown Worlds Entertainment · 2021 · Open World Survival Craft, Survival, Underwater, Singleplayer, Open World

PC
Very Positive90% · 98,6651,244playing now
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$7.49-75%
$29.99lowest tracked $6.20
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Trailers & screenshots

About Subnautica: Below Zero

✦ AI summary

Explore a frozen alien ocean, uncover the mystery of your sister's disappearance, and survive by constructing bases and vehicles while studying bizarre creatures. Below Zero brings you back to Planet 4546B with entirely new arctic biomes, challenging weather mechanics, and a deeper story that expands the original Subnautica universe.

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.

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.

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Not recommended Jul 17, 2026
Forced myself to play through this game and it was not nearly as good as the first one. Whole time playing the game it was like trying to find a needle in a haystack. The seatruck was a piece of ♥♥♥♥, no devs i don't want to drive the modular dildomachine 9000 for the entirety of the game. Bring my goat Riley back.
1 found this helpful
Recommended Jul 17, 2026
Good Game!
Recommended Jul 17, 2026
its really cold
Not recommended Jul 16, 2026
The sound of slurping water is disgusting!
Recommended Jul 16, 2026
not as good as subnautica 1 but still a very good game, love it
Recommended Jul 16, 2026
It s a good game, however not better than the first one. Still recommend it.

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