Single-player games like Space Simulator
Below are 7 single-player Steam games similar to Space 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 Space Simulator page.
Ranked picks
- 1
Dyson Sphere Program
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
Build the most efficient intergalactic factory in space simulation strategy game Dyson Sphere Program! Harness the power of stars, collect resources, plan and design production lines and develop your interstellar factory from a small space workshop to a galaxy-wide industrial empire.
- 2
Kerbal Space Program 2
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
Kerbal Space Program 2 is the sequel to the acclaimed space-flight simulation game Kerbal Space Program. Enter the next generation of space adventure with exciting new parts, stunning visuals, fully revamped UI and Map View, and rich new environments to explore.
- 3
Spaceflight Simulator
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
In Spaceflight Simulator, you will get to build your rockets, plan launches and flights, attempt landings, deploy payloads and explore new worlds.
- 4
Universe Sandbox
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
Create & destroy on an unimaginable scale with a realistic physics-based space simulator. Explore the beauty of our universe and the fragility of our planet. Use science to bend the laws of gravity, collide planets, boil away oceans, fire epic space lasers, and customize your universe.
- 5
SpaceEngine
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
The world's first science-based photorealistic interactive 3D planetarium that models the entire Universe, using procedural generation for uncharted areas.
- 6
Cosmoteer: Starship Architect & Commander
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
Design and simulate the starships of your dreams! Command your ship or fleet in epic battles and manage your crew while exploring a dangerous galaxy. Play alone or with friends, test your ships in online PvP, and let your imagination reach for the stars!
- 7
Kerbal Space Program
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space 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.