IMHO.

Single-player games like Firebase Defence

Below are 8 single-player Steam games similar to Firebase Defence, 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 Firebase Defence page.

Ranked picks

  1. 1
    BANNERMEN — Steam game cover

    BANNERMEN

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Action and Strategy with Firebase Defence.

    A singleplayer fast-paced classic RTS game in which you take on the role of a fallen lord on his journey back to become one of the mightiest in the medieval realm of Valtoria.

    2019ActionStrategyIndie14.99 USDSingle-playerSimilar games →
  2. 2
    Final Outpost: Definitive Edition — Steam game cover

    Final Outpost: Definitive Edition

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy with Firebase Defence.

    Final Outpost is a survival strategy base-builder. You lead the last survivors of the apocalypse. Assign roles, craft tools, and manage resources carefully. Construct buildings, level up your citizens, and fortify your town against hordes of zombies. How many days can you survive?

    2025StrategySimulation9.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Skirmish Line — Steam game cover

    Skirmish Line

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Action and Strategy with Firebase Defence.

    Experience the brutality and randomness of war as an Allied tactical commander in the Pacific Theater during World War 2. Train, equip, and command a squad of soldiers as you fight against the fanatical Imperial Japanese Empire.

    2019ActionStrategyIndie9.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    MarZ: Tactical Base Defense — Steam game cover

    MarZ: Tactical Base Defense

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Firebase Defence.

    Build your defense base to fight back the undead hordes of Mars and secure the future of the red planet. MarZ is a game of strategy and tactical defense where you must carefully manage your crew and resources as you try to uncover the terrible secrets of the undead.

    2019StrategyIndie21.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    They Are Billions — Steam game cover

    They Are Billions

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy with Firebase Defence.

    They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?

    2019Strategy29.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Warhammer® 40,000: Dawn of War® - Dark Crusade — Steam game cover

    Warhammer® 40,000: Dawn of War® - Dark Crusade

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy with Firebase Defence.

    Deep under the central desert of Kronus, a vast honeycomb of skull-lined tunnels and funeral chambers house the awakening Necron menace. Eons ago, these were the boulevards and squares of a great necropolis built to house the bones of the races who had fallen to the Necrons, and ultimately were where the Necrons themselves retire to...

    2007StrategyDeck PlayableSingle-playerSimilar games →
  7. 7
    Warhammer 40,000: Dawn of War - Anniversary Edition (Classic) — Steam game cover

    Warhammer 40,000: Dawn of War - Anniversary Edition (Classic)

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy with Firebase Defence.

    All of Warhammer 40,000: Dawn of War in one glorious package. Play the genre-defining classic real time strategy game in all its blood-soaked glory, including four complete campaigns and nine full-fledged factions.

    2007Strategy14.99 USDSingle-playerSimilar games →
  8. 8
    Cursed Treasure 2 — Steam game cover

    Cursed Treasure 2

    Single-player alternative to Firebase Defence — playable solo, no multiplayer required. Shares Strategy and Indie with Firebase Defence.

    Why be good when you can be... bad? Cursed Treasure 2 is an addictive tower-defense game that puts the power of darkness at your fingertips. Build towers of powerful orcs, demons, and undead, and master powerful spells, to protect your precious hoard from all manner of no-good do-gooders.

    2017StrategyIndie4.99 USDSingle-playerSimilar games →