Single-player games like Ancient Space
Below are 15 single-player Steam games similar to Ancient Space, 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 Ancient Space page.
Ranked picks
- 1
Astrosphere
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
In Astrosphere, a sci-fi strategy adventure game, you build a space station, explore galaxies, equip spaceships, and tackle risky missions. Gather resources, research technologies, and write your legend in the cosmos!
- 2
Asteroid Colony
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
In this real time strategy city builder game you will help humanity in reaching beyond earth by establishing a permanent and thriving settlement in the asteroid belt. Settling in space comes with enormous challenges and dangers, which you will have to guide your people through
- 3
Periapsis: Gravity Slingshot
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Lead humanity’s final journey beyond Earth. Launch ships, harness gravity slingshots, and explore distant star systems to make humanity multi-planetary.
- 4
Surviving Mars
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
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.
- 5
Venusville - Prologue
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Guide a robotic mission in Venus’s polar clouds in this space colonisation city builder. Collect energy, mine resources, balance buoyancy to stay afloat, in the treacherous Venusian atmosphere, and build a self-sufficient base while navigating storms and acid clouds to hunt mysterious anomalies.
- 6
Sins of a Solar Empire: Trinity®
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
In Sins of a Solar Empire: Trinity, you are the leader of a civilization embroiled in a galactic war, fighting for the survival of your entire race against relentless foes.
- 7
Space Haven
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
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.
- 8
Interstellaria
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
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.
- 9
Stellaris
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Explore a galaxy full of wonders in this sci-fi grand strategy game from Paradox Development Studios. Interact with diverse alien races, discover strange new worlds with unexpected events and expand the reach of your empire. Each new adventure holds almost limitless possibilities.
- 10
Homeworld Remastered Collection
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Experience the epic space strategy games that redefined the RTS genre. Control your fleet and build an armada across more than 30 single-player missions. Choose unit types, fleet formations and flight tactics for each strategic situation.
- 11
O.R.B: Off-World Resource Base
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
An epic struggle for control!
- 12
Hard West
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
When a tragic turn of events sets one man down a path of supernatural chaos and revenge, he must brutally hunt down all those who wronged him. Fight and survive through 8 unique story-based scenarios, and try your hand at 40 individually designed turn-based combat missions
- 13
POSTAL: Brain Damaged
Single-player alternative to Ancient Space — playable solo, no multiplayer required.
POSTAL: Brain Damaged is a new, action-oriented take on the Running With Scissors’ cult game series with throwback graphics, and fast-paced, modern gameplay. Take a wild roller coaster ride through the twisted wonderland encased in the POSTAL DUDE’S messed-up mind.
- 14
Phantom Doctrine
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
The year is 1983. The world teeters on the verge of destruction as the Cold War tightens its icy grip. East or West: trust no one, question everything. The fate of humanity rests in your hands as you pit spy versus spy in tactical Phantom Doctrine.
- 15
Aircraft Carrier Survival: Tutorial
Single-player alternative to Ancient Space — playable solo, no multiplayer required.
When the harshness of the sea meets the cruelties of war, a challenge for perseverance makes itself known. And it is like none other. Welcome to Aircraft Carrier Survival, a strategy set in the merciless reality of World War II, where your prowess as a commander decides the fate of a naval behemoth.