Single-player games like Spacebase DF-9
Below are 20 single-player Steam games similar to Spacebase DF-9, 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 Spacebase DF-9 page.
Ranked picks
- 1
Space Haven
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
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.
- 2
Planetbase
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
Guide a group of space settlers trying to establish a base on a remote planet. Grow food, collect energy, mine resources, survive disasters and build a self-sufficient colony in a harsh and unforgiving environment.
- 3
Surviving Mars
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Simulation with Spacebase DF-9.
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.
- 4
Spacebase Startopia
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Simulation with Spacebase DF-9.
Spacebase Startopia captivates with its original mixture of economic simulation and empire building strategy paired with classic RTS skirmishes and a good dose of humor.
- 5
The Final Earth 2
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
The Final Earth 2 is a vertical sci-fi city builder. Earth is unlivable, so you decide to create a space colony. Gather resources, then build and research your way to a better future! Grow your city from an exploration ship to a huge metropolis, full of advanced technology. What will you build?
- 6
RimWorld
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
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.
- 7
The Crust
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Simulation with Spacebase DF-9.
Automate a lunar base as you become the savior of humanity exploring the future on the moon. Mine, craft, research, and trade resources with Earth in this gripping narrative basebuilder.
- 8
Aven Colony
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
Build a new home for humanity in Aven Colony. Discover Aven Prime - an alien planet of deserts, tundras, and wetlands light years from earth. Build your colonies into massive, sprawling cities whilst dealing with the challenges faced when settling on a new world.
- 9
Prison Architect
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
Only the world’s most ruthless Warden can contain the world’s most ruthless inmates. Design and develop your personalized penitentiary in Prison Architect.
- 10
Space Engineers
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
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.
- 11
The Spatials: Galactology
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy and Indie with Spacebase DF-9.
The Spatials are back with Galactology! Design, build and protect your colony station from the many enemies you will make while exploring the galaxy and exploding their homeworlds.
- 12
Oxygen Not Included
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Indie and Simulation with Spacebase DF-9.
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.
- 13
Psychonauts
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
A Psychic Odyssey Through the Minds of Misfits, Monsters, and Madmen. This classic action/adventure platformer from acclaimed developers Double Fine Productions follows the story of a young psychic named Razputin.
- 14
Psychonauts 2
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
Combining quirky missions and mysterious conspiracies, Psychonauts 2 is a platform-adventure game with cinematic style and tons of customizable psychic powers.
- 15
Brutal Legend
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Strategy with Spacebase DF-9.
Brütal Legend is an action-adventure that marries visceral action combat with open-world freedom. Set in a universe somewhere between Lord of the Rings and Spinal Tap, it’s a fresh take on the action/driving genre, which in this case is full of imitation cover bands, demons intent on enslaving humanity and Heavy metal tunes.
- 16
Grim Fandango Remastered
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
One of the most acclaimed adventure games of all time is now back, better than ever. Grim Fandango Remastered has the all the beautiful art and engaging story fans remember, but has also been remastered to look, sound, and control even better than the award-winning original release.
- 17
Broken Age
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required. Shares Indie with Spacebase DF-9.
A family friendly, hand-animated, puzzle-filled adventure game with an all-star cast, including Elijah Wood, Jack Black and Masasa Moyo. Funded by a record breaking crowdfunding campaign and designed by industry legend Tim Schafer, Broken Age is a timeless coming-of-age story.
- 18
Day of the Tentacle Remastered
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
Originally released by LucasArts in 1993 as a sequel to Ron Gilbert’s ground breaking Maniac Mansion, Day of the Tentacle is back in a remastered edition that features all new hand-drawn, high resolution artwork, with remastered audio, music and sound effects.
- 19
Costume Quest
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
A Halloween adventure from Tim Schafer's Double Fine Productions.
- 20
Full Throttle Remastered
Single-player alternative to Spacebase DF-9 — playable solo, no multiplayer required.
Originally released by LucasArts in 1995, Full Throttle is a classic graphic adventure game from industry legend Tim Schafer, telling the story of Ben Throttle; butt-kicking leader of biker gang the Polecats, who gets caught up in a tale of Motorcycles, Mayhem and Murder.