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
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.
- 3
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.
- 4
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!
- 5
Periapsis: Gravity Slingshot
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Indie and Simulation with Solar System Simulator.
Lead humanity’s final journey beyond Earth. Launch ships, harness gravity slingshots, and explore distant star systems to make humanity multi-planetary.
- 6
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.
- 7
Take On Mars
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
Take On Mars places you right in the middle of mankind’s most exciting undertaking. Start out in the seat of a rover operator, finish as the first human to have ever set foot on the Red Planet.
- 8
Airport Ground Handling Simulator VR
Single-player alternative to Solar System Simulator — playable solo, no multiplayer required. Shares Simulation with Solar System Simulator.
This is a consumer version of the professional VR training software developed by AVIAR and used by the biggest airports and ground handlers to train their ground staff. Your role is a ground crew member and you will perform different tasks during an aircraft turnaround process at the airport.