Single-player games like Astro Architect
Below are 8 single-player Steam games similar to Astro 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 Astro Architect page.
Ranked picks
- 1
Starship Colony
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Astro Architect.
A deep starship colony sim. Build your starship, manage air, water, food, fuel, energy, temperature and psychology to keep your crew alive across vast distances. Closed-loop system in space. Mining, wiring, plumbing, in-ship factory, (alien?) radio signals & translation, diplomacy, combat, and more.
- 2
Terra-7
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy with Astro Architect.
A Business Colony Sim where you build your company on a hostile alien world. Keep your employees happy. Bring results—and profits—to investors. All at the same time!
- 3
Starport Tycoon
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Astro Architect.
Starport Tycoon is a trade and management simulation set it space. Obtain landing rights, transport goods, plan profitable routes, develop spaceports and your fleet. Hold your ground against competitors and pirates.
- 4
Corsair Cove
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy with Astro Architect.
Build a sprawling pirate haven, raise a fleet to explore the high seas, and take on the Crown to keep the Age of Piracy alive! From ale to flintlock pistols, and from scallywags to swashbucklers, you’ll need to manage complex production chains and govern a rowdy crew to reign supreme over the seas!
- 5
Here Comes The Swarm
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Astro Architect.
Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?
- 6
IDLE BOSS RUSH
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Astro Architect.
Slay giant bosses and turn the hollow wasteland into the almighty kingdom! Endlessly rewarding incremental game where you collect fountains of rare loot, unleash crazy combos and watch the monsters fall under your knees. Boss Rush that keeps on going when you're gone!
- 7
Dark Moon
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy and Indie with Astro Architect.
Dark Moon is a survival strategy game where in order to survive you must avoid the Sun’s scorching rays and embrace the darkness. Gather resources, upgrade your mobile base, make tough moral decisions, but most importantly - don’t go into the light!
- 8
Surviving Mars: Relaunched
Single-player alternative to Astro Architect — playable solo, no multiplayer required. Shares Strategy with Astro Architect.
The award-winning sci-fi city builder is back - remastered, expanded and even more stunning. Colonize Mars and survive the process, from exploration and infrastructure to welcoming colonists and achieving long-term stability. Are you ready? Mars is waiting.