Single-player games like Battlevoid: Sector Siege
Below are 13 single-player Steam games similar to Battlevoid: Sector Siege, 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 Battlevoid: Sector Siege page.
Ranked picks
- 1

Battlevoid: Harbinger
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Action and Strategy with Battlevoid: Sector Siege.
Battlevoid: Harbinger is a hard sci-fi space exploration game blending roguelike, turn-based, star map strategy, and real-time space battles. You are a young commander venturing out into enemy territories, to unknown galaxies, never knowing what you will face as you jump out from hyperspace.
- 2

Polaris Sector
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Simulation with Battlevoid: Sector Siege.
Can anyone build an empire in a place like this? Other factions are naturally suspicious of newcomers and may wage war at the first sign of unidentified craft. Here, a natural death is an uncommon luxury.
- 3

The Red Solstice
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy with Battlevoid: Sector Siege.
2280 A.D. The last few survivors of a ruined Earth seek a new home: Mars, a planet whose inhabitants didn't take too kindly to outsiders. The Red Solstice is a tense, tactical, squad-based action game. Fight to survive with up to 8 players in co-op, or lead your own squad in single-player mode.
- 4

Infested Planet
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Action and Strategy with Battlevoid: Sector Siege.
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
- 5

Homeworld: Deserts of Kharak
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy with Battlevoid: Sector Siege.
A ground-based RTS prequel to the classic Homeworld games. Assemble your fleet and lead them to victory on the shifting sands of Kharak in this compelling strategy game for PC from Blackbird Interactive.
- 6

AI War 2
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Battlevoid: Sector Siege.
The most devious and acclaimed artificial intelligence in strategy gaming is better than ever. A grand strategy/RTS hybrid that reverses many conventions of both genres. Take territory without attracting attention, build your empire with care, and adapt to an ever-evolving galactic battleground.
- 7

Nexus - The Jupiter Incident
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Battlevoid: Sector Siege.
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."
- 8

SPACECOM
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Battlevoid: Sector Siege.
SPACECOM – a strategic-to-the-bone, starfleet command game in which deception, smart movement, and choices to battle decide victory or defeat.
- 9

Space Haven
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Indie with Battlevoid: Sector Siege.
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.
- 10

STAR WARS™ Empire at War - Gold Pack
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy with Battlevoid: Sector Siege.
Command or corrupt an entire galaxy in the definitive Star Wars strategy collection. It is a time of galactic civil war. Will you take up the reins of the Rebellion, assume control of the Empire, or rule the Star Wars Underworld?
- 11

Majesty 2
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Strategy and Simulation with Battlevoid: Sector Siege.
In the world of Majesty, you are the ruler of the kingdom Ardania. At your service are your loyal and somewhat obnoxious subordinates, who have their own minds about how things should be done. In fact, Majesty is the only game where your heroes decide on their own what should be done and when, leaving you to try to control them through...
- 12

Gladiator
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Action and Strategy with Battlevoid: Sector Siege.
Try to survive for honor and glory as Elvan in the medieval world. Build cities, gather your men, construct castles, and follow the main story. While exploring the open world, focus on uncovering the mysteries and dangers that await. Survive and uncover the secrets of the past.
- 13

Z
Single-player alternative to Battlevoid: Sector Siege — playable solo, no multiplayer required. Shares Action and Strategy with Battlevoid: Sector Siege.
“Z”, the classic Real Time Strategy Game by the Bitmap Brothers. Fans of this classic strategy title are in for a real treat. Everything is in here from the terrific comedy cut scenes to the frantic game play making this is the definitive version of Z.