Single-player games like Gemini Wars
Below are 16 single-player Steam games similar to Gemini Wars, 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 Gemini Wars page.
Ranked picks
- 1
Stellar Sovereigns
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
Indie 4X space strategy game with TB empire management and RTS combat set in a 3D star cluster. Build an interstellar empire by colonizing and conquering star systems, develop your colonies establish trade routes and construct fleets from a range of retrofittable capital & escort class vessels.
- 2
StarFringe: Adversus
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy with Gemini Wars.
This is the story about the beginning of the conquest of outer space by earthlings. It began as a global idea of saving mankind from hunger and lack of resources, and ended as a brutal and merciless war in space far from Earth.
- 3
Golden Age
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy with Gemini Wars.
Guard the holy city, and at the right time, go deep into the hinterland of the dark legion, and retrieve the holy objects lost in the last temple catastrophe, the book of contract, the holy grail, the holy sword, the holy stone, the magic bottle, the Thor's hammer, etc.
- 4
Sins of a Solar Empire: Trinity®
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
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.
- 5
Airships: Conquer the Skies
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
Construct mighty steampunk airships and fly them into battle, waging war and conquering the skies!
- 6
Dust Fleet
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
Assume command of a battle fleet and deploy immediately to the Dust Zone, commander. Our main food supply station has gone dark and the United Earth Nations (UEN) needs to know why in this 4X RTS space sim. Manage your ships, control space stations, and watch your back.
- 7
AI War 2
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
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.
- 8
Polaris Sector
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy with Gemini Wars.
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.
- 9
Descent: FreeSpace – The Great War
Single-player alternative to Gemini Wars — playable solo, no multiplayer required.
Volition's classic is back. Descent: FreeSpace is the quintessential old school space shooter. With a deep story, great graphics and engaging battles against fighters to capital ships it keeps you moving. Breakout that flight stick and enroll with the Grand Terran Alliance today.
- 10
Haegemonia: Legions of Iron
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
From the makers of the award-winning Imperium Galactica 1 and 2 games, discover a powerful space-opera like RTS game.
- 11
Sins of a Solar Empire II
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy with Gemini Wars.
Battle for galactic dominance in this real-time 4X strategy game with unrivaled scale! You’ll explore, expand, exploit, and exterminate through military force, diplomacy, trade, culture, influence, and other underhanded tactics.
- 12
Those Who Remain
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Indie with Gemini Wars.
As the lights go out, the embers of darkness are stoked in the sleepy town of Dormont. Confront uncomfortable horrors, keep your sanity in check and survive the night in this story-driven first-person psychological-thriller.
- 13
Syndrome
Single-player alternative to Gemini Wars — playable solo, no multiplayer required.
Syndrome, a sci-fi survival horror game that places you in a living hell inside a doomed starship. Find out what happened to your lost crew. Run. Hide. Fight. Survive.
- 14
Beneath
Single-player alternative to Gemini Wars — playable solo, no multiplayer required.
Beneath is a Lovecraft-inspired survival FPS. Scarce ammo, merciless enemies and a sense of the unknown combine in a 10+ hour, story-driven single player campaign, built for both veteran gamers and those seeking a challenging old school experience.
- 15
Mechs & Mercs: Black Talons
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy and Indie with Gemini Wars.
You are the commander of the Black Talons company, currently stationed in the Oberon system. After an eventful campaign, the military Tzanar Union has overrun the planet of Genai and blocked all departure from the system: leaving you and the Black Talons stranded.
- 16
Orczz
Single-player alternative to Gemini Wars — playable solo, no multiplayer required. Shares Strategy with Gemini Wars.
Orczz is a fantasy tower defense game set in the fantasy Kingdom of Whiteleaf, famous for its delicious honey wine – the mead. The player controls the Knight Order of the Mug, protectors of Whiteleaf and the mead, who are once again called to defend the land against an invading horde of orcs.