Games like Orbit One
Games like Orbit One include Kerbal Space Program, Totally Accurate Battle Simulator, Hardspace: Shipbreaker, FTL: Faster Than Light, and Space Engineers. We matched them by the tags players give Orbit One on Steam (Simulation, Strategy, Space Sim, Physics, and Space): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Simulation · Space · Physics

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Physics

Hardspace: Shipbreaker
Shared: Simulation · Space · Physics

FTL: Faster Than Light
Shared: Strategy · Space · Indie

Space Engineers
Shared: Simulation · Space · Physics

X4: Foundations
Shared: Simulation · Space · Space Sim

Universe Sandbox
Shared: Simulation · Space Sim · Space

Solar Expanse - Space Exploration Manager
Shared: Simulation · Space · Physics

Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim

Plague Inc: Evolved
Shared: Simulation · Strategy · Indie

Stellaris
Shared: Strategy · Space · Simulation

Spaceflight Simulator
Shared: Space Sim · Simulation · Space

Cosmoteer: Starship Architect & Commander
Shared: Space · Strategy · Space Sim

Dyson Sphere Program
Shared: Space · Simulation · Strategy

Between the Stars
Shared: Simulation · Space · Strategy

Teardown
Shared: Physics · Indie · Singleplayer

Elite Dangerous
Shared: Space Sim · Space · Simulation

Children of a Dead Earth
Shared: Simulation · Strategy · Space

Game Dev Tycoon
Shared: Simulation · Strategy · Indie

Tin Can
Shared: Simulation · Space · Strategy

Starpoint Gemini Warlords
Shared: Strategy · Simulation · Space

Kerbal Space Program 2
Shared: Space · Physics · Simulation

X Rebirth
Shared: Simulation · Space · Space Sim

Total Tank Simulator
Shared: Simulation · Strategy · Indie