Single-player games like Solar System Simulator
Below are 8 single-player Steam games similar to Solar System Simulator, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Solar System Simulator page.
Ranked picks
- 1
StarbaseSim
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
Operate the Starship space launch system and learn how to catch a rocket to understand what it takes to colonize Mars in this ever-evolving simulation of SpaceX Starbase Texas.
- 2
Space Crash Simulator
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Solar System Simulator.
Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!
- 3
Starship Simulator
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
Explore a scientifically accurate Milky Way galaxy and discover distant uncharted worlds, while having unrestricted access to every deck of your Magellan Class deep space exploration vessel. Interact with numerous fully simulated ship systems, or simply relax in the bar and watch the stars drift by.
- 4
Lunar Odyssey
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
Don your xEMU Spacesuit, explore the Orontius Crater, and Lunar Module in an immersive first-person VR experience with out of this world accuracy and interaction. Follow real-life procedures, launch the Apollo-era Lunar Module, play Space Golf, and experience the moon like never before.
- 5
Rocket Science
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
Take part in a space program. Design spacecrafts and send them off to explore the vast expanses of space. Experience the real scale of the Solar system and the size of its celestial bodies.
- 6
Space Travellers
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Indie with Solar System Simulator.
Space Travellers is a unique open-world sandbox space simulator set in the year 2343. Travel the galaxy, trade, explore unexplored worlds, fight, build bases and factories, forge alliances and experience new adventures!
- 7
World Climate Lab
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Solar System Simulator.
World Climate Lab is a real-time planetary climate simulator. Import your own terrain or sculpt a world in the topography editor, then watch a living climate emerge from physics: winds, oceans, cloud bands and ice. Every climate is calculated, not painted.
- 8
Kerbal Space Program
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Solar System Simulator.
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.