Single-player games like Descent Horizon
Below are 8 single-player Steam games similar to Descent Horizon, 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 Descent Horizon page.
Ranked picks
- 1
K2-18b: Legacy
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
In this walking simulator, you'll immerse yourself in a mysterious and unknown atmosphere accompanied by original, atmospheric music. As you navigate unique labyrinths, you'll uncover a fascinating storyline, explore the world of an exoplanet, and uncover its secrets.
- 2
Vessels
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
Quarantined inside an airlock. No memories. No way out. The remaining crew thinks there’s something wrong with you, but the Voice says it’ll help you escape. Navigate volatile conversations & unravel mysteries in this narrative adventure about trust, self-destruction, & shifting identities.
- 3
Exo One
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
A strange signal... an alien craft... an interplanetary, gravity-defying journey through space and time.
- 4
Kerbal Space Program
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Simulation with Descent Horizon.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.
- 5
Gaia Beyond
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
Gaia Beyond is a handcrafted 2D Action-RPG, an exploration mix built around the core features fighting, mining and trading. Your decisions are footprints within a vast non-linear solar system. Forge alliances among numerous factions and develop relations with hundreds of NPCs.
- 6
Celestial Command
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
Mine asteroids, salvage space debris, design your own small or massive spacecraft using individual functional components, complete missions, and engage in battles against enemies in a vast galaxy with realistic physics based on orbital mechanics or in a classic physics mode.
- 7
The Swapper
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
What if someone knew your mind better than you did? The Swapper is an award-winning, narrative driven puzzle game set in the furthest reaches of space.
- 8
Empyrion - Galactic Survival
Single-player alternative to Descent Horizon — playable solo, no multiplayer required. Shares Indie and Adventure with Descent Horizon.
Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!