IMHO.

Single-player games like StarFringe: Adversus

Below are 9 single-player Steam games similar to StarFringe: Adversus, 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 StarFringe: Adversus page.

Ranked picks

  1. 1
    Gemini Wars — Steam game cover

    Gemini Wars

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    Take control of a fleet commander returned from exile, rise through the ranks of the United Space Federation forces and join an epic war across the stars.

    2012StrategyIndie9.99 USDSingle-playerSimilar games →
  2. 2
    Polaris Sector — Steam game cover

    Polaris Sector

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    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.

    2016StrategySimulation39.99 USDSingle-playerSimilar games →
  3. 3
    Sins of a Solar Empire®: Rebellion — Steam game cover

    Sins of a Solar Empire®: Rebellion

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    Command a space-faring empire in Sins of a Solar Empire: Rebellion, the new stand-alone expansion that combines 4X depth with real-time strategy gameplay.

    2012ActionStrategyIndie19.99 USDSingle-playerSimilar games →
  4. 4
    Distant Worlds: Universe — Steam game cover

    Distant Worlds: Universe

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    Distant Worlds is a vast, pausable real-time 4X space strategy game. Experience the full depth and detail of turn-based strategy, but with the simplicity and ease of real-time, and on the scale of a massively-multiplayer online game.  

    2014StrategySimulation29.99 USDSingle-playerSimilar games →
  5. 5
    Cataclismo — Steam game cover

    Cataclismo

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    Design and build fortresses brick by brick to stand against endless hordes of Horrors in this real-time strategy game with resource management, siege defense, and exploration. Lead from the ramparts, push back the darkness, and hold fast against the creatures of the Mist.

    2025StrategySimulation29.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    ENDLESS™ Space - Definitive Edition — Steam game cover

    ENDLESS™ Space - Definitive Edition

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the ENDLESS™ Universe, where you can control every aspect of your civilization as you strive for galactic domination.

    2012Strategy9.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Sid Meier's Civilization®: Beyond Earth™ — Steam game cover

    Sid Meier's Civilization®: Beyond Earth™

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.

    2014Strategy9.99 USDSingle-playerSimilar games →
  8. 8
    AI War: Fleet Command — Steam game cover

    AI War: Fleet Command

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required. Shares Strategy with StarFringe: Adversus.

    "You are outgunned. You are massively outnumbered. You must win." These are your orders. Humanity has already fought its war against the machines -- and lost. AI death squads stand watch over every planet and every wormhole, the few remaining human settlements are held captive in orbiting bubbles, and the AIs have turned their...

    2009StrategyIndie9.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    StellarHub — Steam game cover

    StellarHub

    Single-player alternative to StarFringe: Adversus — playable solo, no multiplayer required.

    StellarHub is a starbase management game where your job is to build a safe and functional space station. Deal with the challenges of managing a station crew while taking care of everyone’s needs. Your tasks include construction, extraction of resources, defense, trade, and more.

    2017Simulation6.99 USDSingle-playerSimilar games →