Single-player games like Subnautica 2
Below are 10 single-player Steam games similar to Subnautica 2, 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 2 page.
Ranked picks
- 1
Depth Diver
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action and Adventure with Subnautica 2.
Dive into an unforgiving underwater nightmare alone or with friends! Complete deadly missions for the Union in the terrifying depths of Gornak. Repair broken pipes, replace defective equipment, and gather scattered body parts to pay off your debt... if the local fauna doesn't get you first.
- 2
No Man's Sky
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action and Adventure with Subnautica 2.
No Man's Sky is a game about exploration and survival in an infinite procedurally generated universe.
- 3
Subnautica: Below Zero
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Adventure with Subnautica 2.
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.
- 4
Subnautica
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Adventure with Subnautica 2.
Descend into the depths of an alien underwater world filled with wonder and peril. Craft equipment, pilot submarines and out-smart wildlife to explore lush coral reefs, volcanoes, cave systems, and more - all while trying to survive.
- 5
Blind Descent
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action and Adventure with Subnautica 2.
Blind Descent is an open-world survival adventure that unveils the mysteries of the Martian depths. Play solo or with friends in 4-player co-op as you search for the missing team. Adapt to survive by building custom tools, upgrading the base, and/or mutating in this bizarre alien world.
- 6
Don't Starve Together
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action and Adventure with Subnautica 2.
Fight, Farm, Build and Explore Together in the standalone multiplayer expansion to the uncompromising wilderness survival game, Don't Starve.
- 7
Satisfactory
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Adventure with Subnautica 2.
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!
- 8
Dune: Awakening
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action and Adventure with Subnautica 2.
Dune: Awakening is an Open World Survival RPG where you can fully immerse yourself in the epic world of Dune. Alone or with friends, explore a vast open world Arrakis, survive the sandworms, build a home, craft an ornithopter, and unravel the mystery of the missing Fremen.
- 9
Moonbreaker
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required. Shares Action with Subnautica 2.
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.
- 10
Zen of Sudoku
Single-player alternative to Subnautica 2 — playable solo, no multiplayer required.
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.