Single-player games like Relativity Wars - A Science Space RTS
Below are 8 single-player Steam games similar to Relativity Wars - A Science Space RTS, 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 Relativity Wars - A Science Space RTS page.
Ranked picks
- 1
Celestial Golf
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Indie with Relativity Wars - A Science Space RTS.
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.
- 2
Spacefleet: Heat Death
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Simulation with Relativity Wars - A Science Space RTS.
In the 23rd century, Earth orbit is flooded with debris from constant warfare. Countries, megacorporations, and mercenaries are fighting for control. Take contracts, build your warfleets, and dominate the Earth-Luna system in this realism-focused strategy RPG!
- 3
Asteroid Colony
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Indie with Relativity Wars - A Science Space RTS.
In this real time strategy city builder game you will help humanity in reaching beyond earth by establishing a permanent and thriving settlement in the asteroid belt. Settling in space comes with enormous challenges and dangers, which you will have to guide your people through
- 4
Orbit-X
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Indie with Relativity Wars - A Science Space RTS.
Launch a rocket. Extend the Antenna. Set your internet service price and start making money. Oh and shoot down asteroids if they threaten your satellites.
- 5
Kerbal Space Program
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Indie and Simulation with Relativity Wars - A Science Space RTS.
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
Celestial Command
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Indie with Relativity Wars - A Science Space RTS.
Mine asteroids, salvage space debris, design your own small or massive spacecraft using individual functional components, complete missions, and engage in battles against enemies in a vast galaxy with realistic physics based on orbital mechanics or in a classic physics mode.
- 7
Solar Expanse - Space Exploration Manager
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Indie with Relativity Wars - A Science Space RTS.
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
Star Trek: Infinite
Single-player alternative to Relativity Wars - A Science Space RTS — playable solo, no multiplayer required. Shares Strategy and Adventure with Relativity Wars - A Science Space RTS.
Star Trek: Infinite is a grand strategy experience that lets you play your own Star Trek story as the leader of one of four major factions in the galaxy. Follow the specially crafted story or blaze your own trail in the first Star Trek grand strategy game.