Games like Star Horizon
Games like Star Horizon include No Man's Sky, Elite Dangerous, Rebel Galaxy, Deliver Us The Moon, and Starfield. We matched them by the tags players give Star Horizon on Steam (Indie, Action, Simulation, Adventure, and Space): closest matches first, and among equally close ones the better-known games.
No Man's Sky
Shared: Space · Sci-fi · Adventure
Elite Dangerous
Shared: Space · Simulation · Sci-fi
Rebel Galaxy
Shared: Space · Sci-fi · Adventure
Deliver Us The Moon
Shared: Indie · Action · Adventure
Starfield
Shared: Space · Singleplayer · Sci-fi
Kerbal Space Program
Shared: Simulation · Space · Indie
Endless Sky
Shared: Space · Simulation · Sci-fi
SPORE™ Galactic Adventures
Shared: Action · Simulation · Adventure
Fallout 4
Shared: Adventure · Singleplayer · RPG
Between the Stars
Shared: Action · Indie · Space
鬼谷八荒 Tale of Immortal
Shared: Simulation · Singleplayer · Action
EVE Online
Shared: Adventure · Simulation · Space
STAR WARS Jedi: Survivor™
Shared: Action · Adventure · Singleplayer
Cyberpunk 2077
Shared: Singleplayer · RPG · Sci-fi
Empyrion - Galactic Survival
Shared: Simulation · Space · Indie
Fallout: New Vegas
Shared: RPG · Singleplayer · Action
Starpoint Gemini 2
Shared: Simulation · Space · Action
Space Engineers
Shared: Simulation · Space · Indie
X Rebirth
Shared: Simulation · Action · Space
Space Pirates And Zombies 2
Shared: Action · Indie · Space
Breathedge
Shared: Space · Indie · Singleplayer
3030 Deathwar Redux - A Space Odyssey
Shared: Indie · Adventure · Action
Mount & Blade II: Bannerlord
Shared: Action · RPG · Singleplayer
Starcom: Nexus
Shared: Space · Action · Sci-fi