Single-player games like Space Simulator
Below are 8 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
Reentry - A Space Flight Simulator
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space Simulator.
Do you have what it takes to become an astronaut? Reentry is a realistic space flight simulator inspired by the early NASA space programs, from orbiting Earth in Mercury and Gemini, to the moon landing in project Apollo. Learn the procedures. Operate the spacecraft. Complete the mission.
- 2
Go For Launch: Mercury
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space Simulator.
Re-live the early days of spaceflight in the accurate, detailed and exciting simulation of the Mercury spacecraft.
- 3
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.
- 4
Space Mechanic Simulator
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space Simulator.
Become a Space Mechanic! Get your hands dirty, explore the depths of space and repair broken machinery. Diagnose problems using diagrams and tools, perform repairs, manage your resources and watch the simulated machinery come alive. Or just gaze upon the beauty of the Solar System.
- 5
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.
- 6
Elite Dangerous
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space Simulator.
Take control of your own starship and blaze your trail in an ever-changing galaxy. Master the arts of combat, mining and trade or venture out into the unknown across a 1:1 scale universe.
- 7
Solar Expanse - Space Exploration Manager
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation and Early Access with Space Simulator.
Explore the Solar System. Mine and drop asteroids. Colonize and terraform. Lead the space race and compete with other corporations on your way to profit. Watch the expansion of human race over the centuries.
- 8
Take On Mars
Single-player alternative to Space Simulator — playable solo, no multiplayer required. Shares Simulation with Space 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.