Games like Solar Expanse - Space Exploration Manager
Games like Solar Expanse - Space Exploration Manager include Kerbal Space Program, Universe Sandbox, Kerbal Space Program 2, Totally Accurate Battle Simulator, and Hardspace: Shipbreaker. We matched them by the tags players give Solar Expanse - Space Exploration Manager on Steam (Space, Simulation, Sandbox, Science, and Physics): closest matches first, and among equally close ones the better-known games.

Kerbal Space Program
Shared: Space · Simulation · Sandbox

Universe Sandbox
Shared: Simulation · Space · Sandbox

Kerbal Space Program 2
Shared: Space · Sandbox · Physics

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics

Hardspace: Shipbreaker
Shared: Space · Simulation · Physics

Space Engineers
Shared: Space · Sandbox · Simulation

Spaceflight Simulator
Shared: Space · Sandbox · Simulation

SpaceEngine
Shared: Space · Sandbox · Sci-fi

Dyson Sphere Program
Shared: Space · Simulation · Sandbox

Stellaris
Shared: Space · Sandbox · Simulation

Universe Sandbox
Shared: Simulation · Space · Sandbox

X4: Foundations
Shared: Space · Simulation · Sandbox

Space Engineers 2
Shared: Space · Sandbox · Simulation

BeamNG.drive
Shared: Simulation · Physics · Sandbox

Cities: Skylines
Shared: Simulation · Sandbox · Singleplayer

Oxygen Not Included
Shared: Singleplayer · Sandbox · Simulation

Empyrion - Galactic Survival
Shared: Simulation · Space · Sandbox

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

Cities: Skylines II
Shared: Simulation · Sandbox · Singleplayer

Automation - The Car Company Tycoon Game
Shared: Simulation · Sandbox · Realistic

Elite Dangerous
Shared: Space · Simulation · Space Sim

Garry's Mod
Shared: Sandbox · Physics · Simulation

X Rebirth
Shared: Space · Simulation · Sandbox

Teardown
Shared: Sandbox · Physics · Singleplayer