Single-player games like 9.8
Below are 8 single-player Steam games similar to 9.8, 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 9.8 page.
Ranked picks
- 1
Universal Combat CE
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Indie with 9.8.
The ultimate space capital ship combat compendium is the evolution of hard core space combat sims. The only game of its kind currently in existence.
- 2
Kerbal Space Program
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Indie and Simulation with 9.8.
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.
- 3
Rocket Science
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Simulation with 9.8.
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.
- 4
Empyrion - Galactic Survival
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Indie with 9.8.
Build and explore in a true space sandbox survival adventure. Construct mighty capital vessels, sprawling planetary settlements, and vast space stations in your galactic journey to discover the mysteries of Empyrion!
- 5
Kerbal Space Program 2
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Indie and Simulation with 9.8.
Kerbal Space Program 2 is the sequel to the acclaimed space-flight simulation game Kerbal Space Program. Enter the next generation of space adventure with exciting new parts, stunning visuals, fully revamped UI and Map View, and rich new environments to explore.
- 6
X3: Terran Conflict
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Simulation with 9.8.
It is the year 2938. The long wished-for encounter of the X Universe and the Earth holds both joy and sorrow for the people. Despite flourishing trade, the clash of the diverse races, cultures and life forms creates new tensions, mistrust and open conflict that need to be overcome!
- 7
X: Beyond the Frontier
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Simulation with 9.8.
The Human Race had advanced to the point where we could travel among the stars, we developed giant automated machines to help us colonise other worlds, but there was a fault in their programming and they turned and attacked. Forcing us to lay a trap to protect Earth and exiling the Human race to stay on Earth once again.
- 8
Celestial Command
Single-player alternative to 9.8 — playable solo, no multiplayer required. Shares Strategy and Indie with 9.8.
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.