Subnautica | Steam

Subnautica is an underwater adventure game based on an alien planet-ocean. A vast open world full of wonders and perils awaits you!

Dive into a vast underwater world

You've crashed on an alien ocean world, and the only way forward is to descend. Subnautica's oceans range from sun-soaked shallow coral reefs to underwater trenches, lava fields and bioluminescent underwater rivers. Manage your oxygen supply by exploring kelp forests, plateaus, reefs and winding cave systems. The water is teeming with life: some useful, some harmful.

Harvest, manufacture and survive

After crash-landing in your escape pod, the clock is ticking to find water, food and develop the equipment you need to explore. Gather resources from the ocean around you. Craft knives, lamps, diving equipment and personal boats. Venture deeper and further out to find rarer resources, allowing you to craft more advanced items.

Build underwater habitats

Build bases on the seabed. Choose plans and components, and manage the integrity of the hull as depth and pressure increase. Use your base to store resources, park vehicles and replenish oxygen as you explore the vast ocean.

Unravel the mystery

What's happened to this planet? There are many signs that something is wrong. What caused you to crash? What's infecting the marine life? Who built the mysterious structures scattered all over the ocean? Can you find a way off the planet alive?

Disrupt the food chain

The ocean is teeming 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 snapping the jaws of roaming predators.

Withstand the pressure

Build a Pressurised Re-Active Waterproof Nano-suit, or PRAWN suit, and explore extreme depths and heat. Modify the suit with drills, torpedo launchers, propulsion cannons, grappling hooks and more.

Fear the night

When the sun goes down, predators come out. The ocean is merciless to those caught off guard in the dark. Areas that can be safely explored by day become treacherous at night, but also reveal a beauty that those who hide from the darkness will never see.

Dive beneath the seabed

Cave systems snake beneath the seabed, from dark, claustrophobic passages to caverns lit by bioluminescent life and hot, burning lava flows. Explore the world beneath the ocean floor, but watch your oxygen levels and take care to avoid the threats that lurk in the darkness.