Single-player games like Starship Theory
Below are 14 single-player Steam games similar to Starship Theory, 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 Starship Theory page.
Ranked picks
- 1
Judgment: Apocalypse Survival Simulation
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
Build, scavenge, craft, and perform occult rituals to survive in a demon-infested, post-apocalyptic colony simulation. Will you survive Judgment day?
- 2
Space Haven
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
Embark on a space voyage with your ragtag crew of civilians in search of a new home. Build spaceships tile by tile, create optimal gas conditions, manage the needs and moods of their crew, encounter other space-faring groups, and explore the universe in this spaceship colony simulation.
- 3
Against the Storm
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Simulation with Starship Theory.
A dark fantasy city builder where you must rebuild civilization in the face of apocalyptic rains. As the Queen’s Viceroy, lead humans, beavers, lizards, foxes, and harpies to reclaim the wilderness and secure a future for civilization's last survivors.
- 4
The Spatials
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Indie and Simulation with Starship Theory.
It's the year 5781 -- and you have been chosen to build and lead a space station in a wild corner of the galaxy! Attract visitors and explore hundreds of planets to fund your station.
- 5
Spacebase DF-9
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
In Spacebase DF-9, you'll build a home among the stars for a motley population of humans and aliens as they go about their daily lives. Mine asteroids, discover derelicts, and deal with the tribulations of galactic resettlement in Earth's distant future.
- 6
Surviving Mars
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Simulation with Starship Theory.
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.
- 7
Oxygen Not Included
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Indie and Simulation with Starship Theory.
Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.
- 8
Stationeers
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Indie and Simulation with Starship Theory.
Stationeers puts you in control of the construction and management of a space station to run by yourself or online with your friends. Complex atmospheric, electrical, manufacturing, agriculture, and gravitational systems require your thought and management at all times!
- 9
RimWorld
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
A sci-fi colony sim driven by an intelligent AI storyteller. Generates stories by simulating psychology, ecology, gunplay, melee combat, climate, biomes, diplomacy, interpersonal relationships, art, medicine, trade, and more.
- 10
Stardeus
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
Stardeus is a deep colony sim set on a broken starship manned by drones and hibernating human survivors. As the AI, have your drones repair your ship, save your crew and travel the stars in this beautiful simulation.
- 11
The Last Starship
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
The Last Starship is a 2D space construction game where you design and upgrade your starship. Choose your path: pirate hunter, miner, engineer, spacebus driver, and more, whilst exploring vibrant star systems. Enjoy a growing sandbox world, with regular free updates. Your cosmic adventure awaits!
- 12
SpaceSlog
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
Build your spaceship, manage your crew, and explore the cosmos whilst trying to keep your crew alive and your ship fully functioning. This game features simulated ship systems and a lived in universe which creates a challenging, unique and unforgettable experience with every playthrough.
- 13
Minecraft: Story Mode - A Telltale Games Series
Single-player alternative to Starship Theory — playable solo, no multiplayer required.
Episode 1 is now FREE - for a limited time! In Minecraft: Story Mode, playing as either a male or female hero named 'Jesse,' you’ll embark on a perilous adventure across the Overworld, through the Nether, to the End, and beyond.
- 14
Prison Architect
Single-player alternative to Starship Theory — playable solo, no multiplayer required. Shares Strategy and Indie with Starship Theory.
Only the world’s most ruthless Warden can contain the world’s most ruthless inmates. Design and develop your personalized penitentiary in Prison Architect.