Single-player games like StackFortress
Below are 8 single-player Steam games similar to StackFortress, 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 StackFortress page.
Ranked picks
- 1
Spacebase DF-9
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy and Simulation with StackFortress.
In Spacebase DF-9, you'll build a home among the stars for a motley population of humans and aliens as they go about their daily lives. Mine asteroids, discover derelicts, and deal with the tribulations of galactic resettlement in Earth's distant future.
- 2
Cliff Empire
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy and Simulation with StackFortress.
After a nuclear war life on the surface became impossible. A 300m thick radioactive fog covered the Earth. We are looking for bold active people to manage the process of restoring life on Earth. Join!
- 3
Space Haven
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy and Simulation with StackFortress.
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.
- 4
RimWorld
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy and Simulation with StackFortress.
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.
- 5
Mars or Die!
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy with StackFortress.
Control two characters simultaneously! Survive, gather, collect upgrades, fight all sizes of one-eyed Martians, build defensible outposts and conquer Mars, in this glorious mix between roguelite and tower defense.
- 6
Surviving Mars
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy and Simulation with StackFortress.
There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.
- 7
The Riftbreaker
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Strategy with StackFortress.
The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.
- 8
Oxygen Not Included
Single-player alternative to StackFortress — playable solo, no multiplayer required. Shares Simulation with StackFortress.
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.