Free games like Space Simulator
Below are 8 free-to-play Steam games similar to Space Simulator, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Space Simulator page.
Ranked picks
- 1
Cell to Singularity - Evolution Never Ends
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.
- 2
Procelio
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
Procelio is a multiplayer vehicle builder/shooter set amidst a proxy war on the red planet. Build and refine your custom machines from orbit, then pilot them in a distant war against CPU and enemy players.
- 3
Spacelines from the Far Out: Flight School
Free-to-play alternative to Space Simulator — no purchase or trial window.
Spacelines from the Far Out: Flight School is all about getting you prepared to take on the task of running your own Spaceline before launch! Join up to 3 other people to take on the challenges and demands as you ferry people to their destination.
- 4
Prosperous Universe
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
In Prosperous Universe start your galactic empire by trading on the real-time market exchange with other real players. Build your 1st base from humble beginnings & watch as your business flourishes with complex supply chain strategies. Economics, politics & realism fuel this immersive business MMO.
- 5
Galaxy Idle Clicker
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
Embark on an interstellar journey with Galaxy Idle Clicker! Conquer galaxies, upgrade your spaceship, and face off against a myriad of enemy ships. With engaging minigames, powerful upgrades, GIC delivers an unparalleled idle space adventure. Join the cosmic conquest today and dominate the universe!
- 6
Gods and Idols
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
Take the role of a newly ascended deity in Gods and Idols. Carve your place among the stars in an open, dynamic, and massive MMORTS universe. Command the powers of the cosmos, form alliances, and use your worshipers as instruments to further your goals.
- 7
Star Hunter - Infinite Lagrange
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
In a remote corner of the Milky Way, you, a star hunter, will control a fleet, take on a wide variety of bounty contracts and missions, and venture into the vastness of space. You will hunt for mysterious items for your employers and explore specific targets in uncharted territory.
- 8
Idle Sphere
Free-to-play alternative to Space Simulator — no purchase or trial window. Shares Simulation with Space Simulator.
Stunning sphere-themed idle/incremental game. Experience simplicity's beauty.