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
Space Reign
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
An indie space-sim and strategy game featuring ship and fleet combat mixed with RTS elements. Complete contracts and Claim sectors for your faction in the near-future, where resource exploiting corporations are in a state of constant conflict over territory control.
- 2
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.
- 3
Void Destroyer
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Combining the best of space combat and real time strategy. Victory can be tactical, a dogfight or capital ship slugging match - depending on how you decide to achieve it. Space combat on a RTS scale with space sim savagery.
- 4
Galactic Ruler
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Galactic Ruler offers real time strategy game play at both planetary level and in space! Lead your faction in diplomacy or conquest across a procedurally generated galactic map where any system might hold hostile enemies or resource riches. Develop advanced technologies to rule the galaxy!
- 5
Mars Horizon
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Lead a major space agency as you guide humanity to Mars in this strategy simulation game. Construct a base, design and build rockets, conduct missions throughout the Solar System, and write your own history of Space exploration. Created with support from the European Space Agency.
- 6
Freespace 2
Single-player alternative to Ancient Space — playable solo, no multiplayer required.
FreeSpace 2, the follow up to the classic Descent: FreeSpace – The Great War is ready to engage you in the second round. Follow the Grand Terran Vasudan Alliance further into the mysteries of the Shivans. Get your flight stick and hit the flight deck. The last time was just a warm up.
- 7
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.
- 8
Nexus - The Jupiter Incident
Single-player alternative to Ancient Space — playable solo, no multiplayer required. Shares Strategy with Ancient Space.
Ambitious megacorporations monopolize the conquest of space and the colonization of the solar system. At the very edge of the solar system, the companies make a discovery that will shift the technological advantage and upset the balance. And so a new conflict is born: "The Jupiter Incident."
- 9
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.
- 10
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!
- 11
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
- 12
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.
- 13
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.
- 14
Black Gold: Oil Drilling Simulator
Single-player alternative to Ancient Space — playable solo, no multiplayer required.
Step into the grit of the early 20th-century oil boom. Build your drilling empire from the dirt up chop timber, maintain rusty machinery, and manage a rugged crew. Strike black gold, overcome ruthless crises, and turn raw earth into an unimaginable fortune. The rush begins now.
- 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.