Single-player games like Stargazer Simulator
Below are 8 single-player Steam games similar to Stargazer 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 Stargazer Simulator page.
Ranked picks
- 1
Space Crash Simulator
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer Simulator.
Real-time planetary collision sandbox powered by SPH physics: smash planets together and watch the destruction and its aftermath!
- 2
Celestial Golf
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required.
It’s 2D golf on an astronomical scale. Bite-sized missions will teach you the techniques of real space flight, without having to worry about fuel or crew. Precisely plan orbital trajectories over the moons of Mars, through the rings of Saturn, and boldly go where no golf ball has gone before.
- 3
Kerbal Space Program
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer 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.
- 4
Soyuz Constructors
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer Simulator.
Become a pioneer of spaceflight. As an engineer in the Soviet Space Program you will be responsible for repairing, fixing and building the iconic spacecraft and rockets from the R-7 family.
- 5
Spaceflight Simulator 2
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer Simulator.
Build rockets and fly them around the Solar System in this realistic aerospace sandbox. Attempt landings, build space stations, drive rovers, perform spacewalks, explore alien worlds, and get your crew home safe.
- 6
Rocket Science
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer 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.
- 7
PlanetMars3D: Spirit Mission
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer Simulator.
Explore Mars in 3D through real Pancam photographs from NASA's Spirit rover. Glide between images with detail that sharpens as you approach, and skim thousands of rover photos at a glance — manual mode, slideshow, or automated flythrough. Photo credit: JPL / NASA / Cornell / ASU
- 8
Take On Mars
Single-player alternative to Stargazer Simulator — playable solo, no multiplayer required. Shares Simulation with Stargazer 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.