Single-player games like Subnautica
Below are 17 single-player Steam games similar to Subnautica, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Subnautica page.
Ranked picks
- 1
Subnautica: Below Zero
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
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.
- 2
No Man's Sky
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.
- 3
The Forest
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
As the lone survivor of a passenger jet crash, you find yourself in a mysterious forest battling to stay alive against a society of cannibalistic mutants. Build, explore, survive in this terrifying first person survival horror simulator.
- 4
Grounded
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
The world is a vast, beautiful and dangerous place – especially when you have been shrunk to the size of an ant. Can you thrive alongside the hordes of giant insects, fighting to survive the perils of the backyard?
- 5
Breathedge
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Survive in outer space! Together with your immortal chicken, discover the truth behind your sudden spaceship crash. Craft tools, pilot vehicles, and even control space stations to survive and explore the wreckage.
- 6
Project Castaway
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
Project Castaway is a survival crafting title set in the Pacific Ocean. Live the life of a stranded castaway, with only yourself - and the island's inhabitants - for company! Sail the ocean, hunt, explore unique islands and gather resources as you fight for survival.
- 7
Bermuda - Lost Survival
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Survivors, Adventurers, Explorers! Prepare for the journey of your life and experience one of the world’s most mysterious regions! The Bermuda Triangle is notorious for the vanishing of countless ships and airplanes. Will you survive long enough to reveal its secret?
- 8
Raft
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Raft™ throws you and your friends into an epic oceanic adventure! Alone or together, players battle to survive a perilous voyage across a vast sea! Gather debris, scavenge reefs and build your own floating home, but be wary of the man-eating sharks!
- 9
Outer Wilds
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
Named Game of the Year 2019 by Giant Bomb, Polygon, Eurogamer, and The Guardian, Outer Wilds is a critically-acclaimed and award-winning open world mystery about a solar system trapped in an endless time loop.
- 10
The Planet Crafter
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
A space survival open world terraforming crafting game, designed for 1 to 10 players. Alter the ecosystem of an inhospitable planet to render it habitable for humanity. Survive, gather resources, and build your base. Then, generate oxygen, warmth, and pressure to create a brand new biosphere.
- 11
Pacific Drive
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Face the supernatural dangers of the Olympic Exclusion Zone with a car as your only lifeline in this driving survival adventure! Scavenge resources, load up your trusty station wagon, and drive like hell to make it through alive.
- 12
The Long Dark
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
THE LONG DARK is a thoughtful, exploration-survival experience that challenges solo players to think for themselves as they explore an expansive frozen wilderness in the aftermath of a geomagnetic disaster. There are no zombies -- only you, the cold, and all the threats Mother Nature can muster.
- 13
Don't Starve
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Don’t Starve is an uncompromising wilderness survival game full of science and magic. Enter a strange and unexplored world full of strange creatures, dangers, and surprises. Gather resources to craft items and structures that match your survival style.
- 14
Satisfactory
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie and Adventure with Subnautica.
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
- 15
Subnautica 2
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Adventure with Subnautica.
Subnautica 2 is an underwater survival adventure set on an all-new alien world, developed by Unknown Worlds. Play alone or with friends in 4-player co-op. Adapt to survive by building custom bases and crafting tools. Explore the unknown to uncover the mysteries hidden within the depths.
- 16
Moonbreaker
Single-player alternative to Subnautica — playable solo, no multiplayer required.
Moonbreaker is a turn-based strategy, tactical skirmish game. The game is designed to be a true digital miniatures experience, set in an expansive sci-fi universe crafted by Brandon Sanderson. Direct Captain and Crew in gripping, ever-changing competition and adventure.
- 17
Zen of Sudoku
Single-player alternative to Subnautica — playable solo, no multiplayer required. Shares Indie with Subnautica.
From the creators of Natural Selection comes Zen of Sudoku, a relaxing, easy to play version of Sudoku for your PC.Relax with hand-painted Japanese-styled backgrounds, no timer and lush natural soundscapes.Stimulates your brain to keep it healthy and alert.