Single-player games like Outer Frontier
Below are 9 single-player Steam games similar to Outer Frontier, 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 Outer Frontier page.
Ranked picks
- 1
Town Keeper
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
Build a rabbit town while defending it from the fluffy empire's invasions.
- 2
Shelter Manager
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
We live in a troubled world. Viruses, military conflicts - you never know what danger the world will face tomorrow. It's time to get ready now! Lead a bunker network and start developing society after a global disaster.
- 3
Surviving Mars: Relaunched
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Simulation with Outer Frontier.
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.
- 4
Space Colony: Steam Edition
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Simulation with Outer Frontier.
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.
- 5
United Penguin Kingdom
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
A city-building game where you build a penguin settlement and satisfy the various needs of your penguins while dealing with seals and killer whales. Enjoy the growth of your settlement, become the king, and lead the United Penguin Kingdom.
- 6
Imagine Earth
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
Build your own global colonies on distant worlds. Manage energy and resource supplies and produce goods for space trade. Form economic and diplomatic alliances or take over competing corporations. Conduct research to protect your colonists from disasters and avoid a climate crisis.
- 7
Prison Architect
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
Only the world’s most ruthless Warden can contain the world’s most ruthless inmates. Design and develop your personalized penitentiary in Prison Architect.
- 8
Northgard: Definitive Edition
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Strategy and Indie with Outer Frontier.
Northgard: Definitive Edition is a critically acclaimed real-time strategy game based on Norse mythology. Lead your clan, uncover the secrets of a mysterious newfound continent and defeat your enemies to conquer the Throne!
- 9
Kalzor: 2000
Single-player alternative to Outer Frontier — playable solo, no multiplayer required. Shares Indie and Casual with Outer Frontier.
Shoot different types of spaceships while avoiding getting shot yourself. Kill 10 minutes at a time with this affordable colourful timewaster.