Single-player games like Space Architect
Below are 12 single-player Steam games similar to Space Architect, 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 Space Architect page.
Ranked picks
- 1
Final Upgrade
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Help humanity to spread throughout the cosmos by exploring new worlds, building space factories and setting up trade routes. Research advanced technologies to increase efficiency and unlock new paths of development. Fight off other artificial intelligences in your goal to reach the Final Upgrade!
- 2
The Last Starship
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
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!
- 3
Oxygen Not Included
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Indie and Simulation with Space Architect.
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.
- 4
Space Haven
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
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.
- 5
Prison Architect
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Only the world’s most ruthless Warden can contain the world’s most ruthless inmates. Design and develop your personalized penitentiary in Prison Architect.
- 6
Astro Colony
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Explore endless Universe and create the most efficient constellation of colonies. Build conveyor systems to automate production. Take care of Astronauts and their needs! Establish new colonies as part of intergalactic simulation.
- 7
Per Aspera
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Make Mars your own! Take control of the world’s most sophisticated AI (AMI) and terraform the surface of the Red Planet for a city-building experience on a planetary scale. Transform this barren world into a lush paradise and explore the surface for any ancient secrets that may be waiting.
- 8
Endzone - A World Apart
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Endzone is a post-apocalyptic survival city builder, where you start a new civilization with a group of people after an ecological disaster. Build them a new home and ensure their survival in a shattered world, threatened by constant radiation, toxic rain, sandstorms and droughts.
- 9
Satisfactory
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Satisfactory is a first-person open-world factory building game with a dash of exploration and combat. Play alone or with friends, explore an alien planet, create multi-story factories, and enter conveyor belt heaven!
- 10
RimWorld
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
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.
- 11
Factorio
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Space Architect.
Factorio is a game about building and creating automated factories to produce items of increasing complexity, within an infinite 2D world. Use your imagination to design your factory, combine simple elements into ingenious structures, and finally protect it from the creatures who don't really like you.
- 12
Mindustry
Single-player alternative to Space Architect — playable solo, no multiplayer required. Shares Strategy with Space Architect.
An open-ended factory management game with RTS and tower defense elements.