Games like Solar System Simulator
Games like Solar System Simulator include Kerbal Space Program, Universe Sandbox, SpaceEngine, Kerbal Space Program 2, and X4: Foundations. We matched them by the tags players give Solar System Simulator on Steam (Simulation, Space Sim, Space, Sandbox, and Exploration): closest matches first, and among equally close ones the better-known games.
Kerbal Space Program
Shared: Simulation · Space · Sandbox
Universe Sandbox
Shared: Simulation · Space · Space Sim
SpaceEngine
Shared: Sandbox · Space · Space Sim
Kerbal Space Program 2
Shared: Space · Sandbox · Exploration
X4: Foundations
Shared: Simulation · Space · Space Sim
Elite Dangerous
Shared: Space Sim · Space · Simulation
Space Engineers
Shared: Sandbox · Space · Simulation
Spaceflight Simulator
Shared: Space Sim · Simulation · Sandbox
No Man's Sky
Shared: Space · Exploration · Sandbox
Empyrion - Galactic Survival
Shared: Simulation · Space · Space Sim
SPORE™
Shared: Simulation · Sandbox · Space
EVE Online
Shared: Space Sim · Exploration · Simulation
Avorion
Shared: Space Sim · Sandbox · Exploration
Universe Sandbox
Shared: Simulation · Space · Sandbox
PC Building Simulator
Shared: Simulation · Sandbox · Education
Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Physics
Hardspace: Shipbreaker
Shared: Simulation · Space · Sandbox
Goat Simulator 3
Shared: Sandbox · Simulation · Exploration
Ostranauts
Shared: Simulation · Space Sim · Sandbox
BeamNG.drive
Shared: Simulation · Sandbox · Realistic
Reentry - A Space Flight Simulator
Shared: Simulation · Space · Space Sim
Stellaris
Shared: Space · Simulation · Exploration
Goat Simulator
Shared: Simulation · Sandbox · Casual
Garry's Mod
Shared: Sandbox · Casual · Simulation