Single-player games like Cosmonautica
Below are 14 single-player Steam games similar to Cosmonautica, 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 Cosmonautica page.
Ranked picks
- 1
Interstellaria
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Indie with Cosmonautica.
Managing a fleet across a dangerous galaxy. Every star and planet holds untold riches and dangers. Each encounter will require skills in trading, diplomacy, and combat. Allocate power to engines, charge all weapons, and take on the worst the galaxy has to handle.
- 2
FTL: Faster Than Light
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Indie with Cosmonautica.
This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat.
- 3
X3: Reunion
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy with Cosmonautica.
X3: Reunion continues the epic space saga, blending deep space trading and intense real-time combat. Explore a vast universe, establish your empire, and shape the new frontier. With enhanced graphics and intricate economies, it's a journey of strategy, simulation, and interstellar intrigue.
- 4
Rebel Galaxy
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Indie and Adventure with Cosmonautica.
Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.
- 5
Space Colony: Steam Edition
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmonautica.
Space Colony: Steam Edition is a remaster of the real-time base builder and strategy game from Firefly Studios, creators of the Stronghold series. In Space Colony you colonize to survive, designing intergalactic bases that keep your crew productive, happy and defended against hostile alien threats.
- 6
Void Destroyer 2
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Indie with Cosmonautica.
Start with nothing... End with everything! All you have is a basic ship, barely fit for combat, with it you'll start your journey and empire. A open world space sandbox, inspired by and expanding the classics.
- 7
High Seas, High Profits!
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmonautica.
Live your medieval trader life! Buy low, sell high and explore the world! Buy ships, build businesses, find or train captains. Deal with pirates, manipulate mayors and challenge traders. React to hundreds of events that shape your very own procedurally-generated world!
- 8
X4: Foundations
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Simulation with Cosmonautica.
Your journey to building a vast space empire begins behind the controls of a single ship. Explore, trade, fight, and build as you rise to command fleets, stations, and entire economies in a living, fully simulated universe that reacts to every decision.
- 9
Sid Meier's Pirates!
Single-player alternative to Cosmonautica — playable solo, no multiplayer required.
Sail the Caribbean, marauding all on the high seas or ally your ship and crew as a privateer in search of riches - the life you choose is up to you. Face dogged enemies, raid unsuspecting villages, woo fair maidens, avoid capture or dig for buried treasure. Discover what it takes to become one of the most famous pirates in history!
- 10
Gazillionaire
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Indie with Cosmonautica.
Become a Gazillionaire by starting a tiny trading company and building a business empire!
- 11
Halls of Torment
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Indie with Cosmonautica.
Slay hordes of terrifying monsters in this horde survival roguelite. Descend into the Halls of Torment where the Lords of the underworld await you. Treasures, magical trinkets, and a growing cast of heroes will grant you the power to vanquish these horrors from beyond. How long can you survive?
- 12
Good Company
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Strategy and Indie with Cosmonautica.
Good Company is an in-depth management sim about building a trail-blazing tech corporation. Assemble complex production lines, manage employee logistics, and sell high-quality products on the market to become the best company in the whole county!
- 13
Pressure Overdrive
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Indie with Cosmonautica.
Pressure Overdrive is arcade twin-stick madness on hot wheels in a colorful bathtub-punk setting!
- 14
Halls of Torment: Prelude
Single-player alternative to Cosmonautica — playable solo, no multiplayer required. Shares Indie with Cosmonautica.
Slay hordes of terrifying monsters in this horde survival roguelite. Descend into the Halls of Torment where the Lords of the underworld await you. Treasures, magical trinkets, and a growing cast of heroes will grant you the power to vanquish these horrors from beyond. How long can you survive?