Single-player games like Cosmoteer: Starship Architect & Commander
Below are 15 single-player Steam games similar to Cosmoteer: Starship Architect & Commander, 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 Cosmoteer: Starship Architect & Commander page.
Ranked picks
- 1
Avorion
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Simulation with Cosmoteer: Starship Architect & Commander.
A procedural co-op space sandbox where players can build their own space ships out of dynamically scalable blocks. Fight epic space battles, explore, mine, trade, wage wars and build your own empire to save your galaxy from being torn apart by an unknown enemy.
- 2
MineEngineer
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Simulation with Cosmoteer: Starship Architect & Commander.
Mine. Build. Survive. Engineer your way through the cosmos in this 2D space engineering sandbox!
- 3
Starship EVO
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Simulation with Cosmoteer: Starship Architect & Commander.
Mine and craft your way to orbit, build your own starship and explore a vast, dangerous galaxy alongside your crew. For players who love a meaningful survival progression, a unique and elegant building system, and epic space-opera scale.
- 4
Rank: Warmaster
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
Stranded on Mars with next to nothing, build a city, assemble a fleet, and expand your empire to survive a hostile solar system in this new take that combines elements of space combat and RTS inspired by the classics.
- 5
Stellar Shipyard
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
Stellar Shipyard is a space colony sandbox where you design modular ships and stations, and automate resource production using drones and workers. Let the automated systems fly even the most improvised designs. Face rival factions and threats solo, or alongside friends as allies or rivals.
- 6
Empyrion - Galactic Survival
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
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!
- 7
Arvoch Alliance SE
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Simulation with Cosmoteer: Starship Architect & Commander.
Advanced First Person Space Flight Combat Simulation.
- 8
Evochron Legacy SE
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Simulation with Cosmoteer: Starship Architect & Commander.
Advanced Space Flight, Combat, Trading, and Exploration Simulation. Set in a vast explorable universe, Evochron Legacy offers freeform gameplay with many diverse objectives and paths to choose from.
- 9
Space Engineers
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
Space Engineers is a sandbox engineering game where you design and build ships, stations, and planetary bases in a fully destructible environment. Explore planets and space, mine resources, survive hazards, and engage in combat alone or with friends in Creative or Survival modes.
- 10
Starvector
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy with Cosmoteer: Starship Architect & Commander.
Eat a snack while you watch an entire planet burn in your image.
- 11
Space Pirates and Zombies
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy with Cosmoteer: Starship Architect & Commander.
Explore a randomly generated Galaxy populated with factions, enemies, missions, and items providing you with a unique experience each time you play.
- 12
RimWorld
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
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.
- 13
Battle Brothers
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmoteer: Starship Architect & Commander.
Lead a mercenary company in this tactical RPG set in a medieval fantasy world. Chase fame and fortune as you choose where to go, who to recruit, which contracts to pursue, and how to train and equip your men in a procedurally generated open world campaign.
- 14
Mount & Blade
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required.
Calradia is a land at war, offering great riches and even greater dangers to adventurers and mercenaries that flock to shed their blood on its soil. With courage and a strong sword, an unknown stranger can make a name as a warrior. Free-form sand-box gameplay.
- 15
Event Horizon - Frontier
Single-player alternative to Cosmoteer: Starship Architect & Commander — playable solo, no multiplayer required.
Build an invincible starbase and protect it from enemies. Choose your fleet from an expanse of ships to suit your playstyle, and use the best weapons and modules you have to hand to destroy invaders.