Single-player games like Project Sol
Below are 8 single-player Steam games similar to Project Sol, 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 Project Sol page.
Ranked picks
- 1
VALTERION: THE LOST EARTH
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy with Project Sol.
VALTERION: THE LOST EARTH is a sci-fi colony-building strategy game. Lead 50 survivors on Elyra, build a thriving colony, develop its economy and research, return to the stars, and search for the lost path back to Earth.
- 2
Empires of a Tiny Universe
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy with Project Sol.
Empires of a Tiny Universe is a relaxed single-player RTS where you build and expand your empire across space. Manage planetary infrastructure, develop new technologies for your fleet, and conquer the galaxy - all from a clear, minimalist perspective.
- 3
Space Alliance: Frontier
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy with Project Sol.
Get ready to protect the entire solar system from an unprecedented threat - the D'Ahari, a race of insect-like aliens. Control an entire fleet of spaceships, trade with other races of an Alliance, and develop your own space station.
- 4
Beyond Astra
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy with Project Sol.
Lead your civilization in a galaxy brimming with life and intrigue. Seamlessly explore and expand across uncharted worlds, from their surfaces to the stars. Forge your destiny in this sci-fi 4X offering a unique blend of grand strategy, planetary city-building, and RTS combat.
- 5
The Diner at the End of the Galaxy
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy and Early Access with Project Sol.
Influence the fate of the Nusa star system through your clientele’s stomachs. Grow exotic ingredients, create a menu that appeals to intergalactic palates, and discover treasures in the outer worlds. Come on in! The Diner is always open for business.
- 6
Calyx
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy and Early Access with Project Sol.
A strategy game with a new kind of enemy, Calyx puts you in charge of a space mining outpost, locked in battle against powerful plant-aliens. Build your base, gather resources, assemble your forces, and take on the Calyx. With only an out-of-date AI for company, can you survive?
- 7
Reshaping Mars
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy with Project Sol.
「Reshaping Mars」is a colony simulation game on Mars, you will start by gathering resources, storing food, accepting immigrants, and building a better colony together. Develop powerful technologies for Mars Reshaping, make Mars great agai..sorry, just great. Don't forget to make the residents happy.
- 8
Space Drilling Station
Single-player alternative to Project Sol — playable solo, no multiplayer required. Shares Strategy and Early Access with Project Sol.
In Space Drilling Station, manage a drilling station on a distant planet. Build a multi-level vertical structure to produce and manage your resources and staff, in order to dominate the competition!