Single-player games like EarthX
Below are 9 single-player Steam games similar to EarthX, 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 EarthX page.
Ranked picks
- 1
Mars Horizon
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Strategy and Indie with EarthX.
Lead a major space agency as you guide humanity to Mars in this strategy simulation game. Construct a base, design and build rockets, conduct missions throughout the Solar System, and write your own history of Space exploration. Created with support from the European Space Agency.
- 2
Surviving Mars
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Strategy and Simulation with EarthX.
There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.
- 3
Kerbal Space Program
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Indie and Simulation with EarthX.
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
Rover Mechanic Simulator
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Indie and Simulation with EarthX.
As an Engineer - crew member of one of the first Mars colonies - you are responsible for repairing and maintaining Mars Rovers. In this advanced simulator you will learn the internal details of various Mars Rovers and their components.
- 5
The Final Earth 2
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Strategy and Indie with EarthX.
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony. Gather resources, then build and research your way to a better future! Grow your city from an exploration ship to a huge metropolis, full of advanced technology. What will you build?
- 6
Juno: New Origins
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Indie and Simulation with EarthX.
Bring to life anything you can imagine from rockets and airplanes to cars and more. Automate them with a visual programming language. Explore 3D planets and make your own. Share your creations online. Complete contracts, conquer milestones, and unlock technology in the newly added Career Mode.
- 7
Final Upgrade
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Strategy and Indie with EarthX.
Help humanity to spread throughout the cosmos by exploring new worlds, building space factories and setting up trade routes. Research advanced technologies to increase efficiency and unlock new paths of development. Fight off other artificial intelligences in your goal to reach the Final Upgrade!
- 8
Geo
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Indie and Simulation with EarthX.
Geo is a game about building and expanding an intergalactic mining corporation. Explore uncharted space and discover comets, moons, Planets and gas giants before heading in and drilling the cash out of them! Expand your HQ, build new rooms and facilities to increase your drilling stats.
- 9
EarthX 2
Single-player alternative to EarthX — playable solo, no multiplayer required. Shares Strategy and Simulation with EarthX.
Build and run your own space company. Launch reusable rockets, complete missions, and run a satellite internet network. Manage your factories and fleet, supply colonies on the Moon and Mars, and work toward terraforming the Red Planet.