IMHO.

Free games like Sidereal Dominion: Avalon

Below are 8 free-to-play Steam games similar to Sidereal Dominion: Avalon, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.

Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Sidereal Dominion: Avalon page.

Ranked picks

  1. 1
    Landfall Archives — Steam game cover

    Landfall Archives

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy and Indie with Sidereal Dominion: Avalon.

    Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!

    2023ActionStrategyIndieFreeFree to playSimilar games →
  2. 2
    The Last Sovereign — Steam game cover

    The Last Sovereign

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy and Indie with Sidereal Dominion: Avalon.

    Explore a world torn between armies of lust and purity in which everything is more complex than it seems, deciding the fate of nations through might, politics, and finance. Every decision matters in an intricate saga that tracks thousands of variables.

    2025StrategyIndieAdventureFreeDeck VerifiedFree to playSimilar games →
  3. 3
    Nazi Zombies — Steam game cover

    Nazi Zombies

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Indie and Early Access with Sidereal Dominion: Avalon.

    Nazi Zombies is a cooperative survival game where players fend off escalating waves of Nazi zombies, earning points by killing zombies and repairing barriers to buy weapons, upgrades, perks, and unlock new map areas to maximize their survival.

    2026ActionIndieFree To PlayFreeFree to playSimilar games →
  4. 4
    Crusader Kings II — Steam game cover

    Crusader Kings II

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy with Sidereal Dominion: Avalon.

    Explore one of the defining periods in world history in an experience crafted by the masters of Grand Strategy.

    2012StrategySimulationRPGFreeDeck PlayableFree to playSimilar games →
  5. 5
    One-armed robber — Steam game cover

    One-armed robber

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy and Indie with Sidereal Dominion: Avalon.

    One-armed robber is a chaotic first-person heist game that centers around a uniquely challenging premise. Players take the role of a determined robber equipped with only one arm, tasked with pulling off daring heists on banks, shops, and various establishments.

    2023ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →
  6. 6
    Age of Empires III: Definitive Edition — Steam game cover

    Age of Empires III: Definitive Edition

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy with Sidereal Dominion: Avalon.

    Age of Empires III: Definitive Edition offers players a trial of this historical single & multiplayer RTS experience. *Note: To unlock all features of the game please see the “Base Game” product.

    2020StrategyFree To PlayFreeDeck PlayableFree to playSimilar games →
  7. 7
    Cell to Singularity - Evolution Never Ends — Steam game cover

    Cell to Singularity - Evolution Never Ends

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window.

    The epic story of evolution, technology, humanity, and dinosaurs is yours to tap.

    2021SimulationFree To PlayCasualFreeDeck PlayableFree to playSimilar games →
  8. 8
    Toribash — Steam game cover

    Toribash

    Free-to-play alternative to Sidereal Dominion: Avalon — no purchase or trial window. Shares Strategy and Indie with Sidereal Dominion: Avalon.

    Toribash is an innovative free-to-play online turn-based fighting game where you’re able to design your own moves. Complete control over character's body, hundreds of game mods and bloody mess with full body dismemberment - you've never been able to annihilate your enemies like that before!

    2014ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →