Games like OrbitFix
Games like OrbitFix include Kerbal Space Program, Hardspace: Shipbreaker, Elite Dangerous, Dyson Sphere Program, and Starpoint Gemini 2. We matched them by the tags players give OrbitFix on Steam (Simulation, Singleplayer, Space Sim, Shop Keeper, and 3D): closest matches first, and among equally close ones the better-known games.
Kerbal Space Program
Shared: Simulation · Space Sim · Singleplayer
Hardspace: Shipbreaker
Shared: Simulation · Singleplayer · Sci-fi
Elite Dangerous
Shared: Space Sim · Simulation · Sci-fi
Dyson Sphere Program
Shared: Simulation · Sci-fi · Building
Starpoint Gemini 2
Shared: Simulation · Space Sim · Singleplayer
Starfield
Shared: Singleplayer · Sci-fi · First-Person
Cosmoteer: Starship Architect & Commander
Shared: Singleplayer · Sci-fi · Space Sim
SpaceBourne 2
Shared: Space Sim · 3D · First-Person
X4: Foundations
Shared: Simulation · Space Sim · Sci-fi
House Flipper
Shared: Simulation · Singleplayer · Building
Supermarket Simulator
Shared: Simulation · Singleplayer · First-Person
Space Engineers
Shared: Simulation · Singleplayer · Building
Cyberpunk 2077
Shared: Singleplayer · RPG · Sci-fi
Slime Rancher 2
Shared: Singleplayer · Simulation · First-Person
Retro Rewind - Video Store Simulator
Shared: Simulation · Shop Keeper · Singleplayer
Quarantine Zone: The Last Check
Shared: Simulation · Singleplayer · First-Person
TCG Card Shop Simulator
Shared: Simulation · Singleplayer · Shop Keeper
Universe Sandbox
Shared: Simulation · Space Sim · Space
PC Building Simulator
Shared: Simulation · First-Person · 3D
Oxygen Not Included
Shared: Singleplayer · Simulation · Building
SpaceEngine
Shared: Space Sim · Sci-fi · 3D
FTL: Faster Than Light
Shared: Singleplayer · Sci-fi · Indie
Empyrion - Galactic Survival
Shared: Simulation · Space Sim · Space
Gas Station Simulator
Shared: Simulation · Singleplayer · First-Person