IMHO.

Single-player games like Galactic Garrison

Below are 8 single-player Steam games similar to Galactic Garrison, 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 Galactic Garrison page.

Ranked picks

  1. 1
    Bulwark — Steam game cover

    Bulwark

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

    Bulwark is a medieval-themed 2D pixel tower defense game with a dynamic block-based building system. Construct and fortify your castle, manage resources, and recruit troops to defend against waves of enemies. Build, strategize, and adapt in this unique blend of fortress construction and combat.

    2024ActionStrategyIndie6.99 USDSingle-playerSimilar games →
  2. 2
    Nomad Defender — Steam game cover

    Nomad Defender

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

    You wake up in a gloomy room. Become the test subject of a shady software program that feeds on Tower Defense - Roguelike - Deckbuilder simulations.

    2025Strategy8.99 USDSingle-playerSimilar games →
  3. 3
    Taur — Steam game cover

    Taur

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

    Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?

    2020ActionStrategyIndie24.99 USDDeck PlayableSingle-playerSimilar games →
  4. 4
    Party Demon — Steam game cover

    Party Demon

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

    Party Demon is a tower defense, deck-building game where your main goal is to protect a Lady Demon’s birthday party from human intruders. Build your castle on a budget and defend it in real-time with a deadly Trap Deck full of demonic weapons.

    2025ActionStrategyIndie1.99 USDSingle-playerSimilar games →
  5. 5
    Insectum - Epic Battles of Bugs — Steam game cover

    Insectum - Epic Battles of Bugs

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

    Immerse yourself in the epic battles of "Insectum" and unleash the power of your monstrous insects. Face off against your rivals on the battlefield by strategically using cards.

    2024ActionStrategy9.99 USDSingle-playerSimilar games →
  6. 6
    Unsung Heroes: Card Wars — Steam game cover

    Unsung Heroes: Card Wars

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

    This is an auto-battler game featuring large turn-based elements with small real-time aspects, and it has an off-battlefield growth system. Develop your camp, upgrade your characters, refine items, freely combine cards during battles, and use well-timed construction to complete levels.

    2025StrategyIndieAdventure14.99 USDSingle-playerSimilar games →
  7. 7
    Northend Tower Defense — Steam game cover

    Northend Tower Defense

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

    Jump into a realtime strategy, action filled battlefield, deploy relentless soldiers, unlock powerful troops and vehicles, upgrade your army, decimate the enemy. If that's not enough, jump into a chaotic Zombie mode, with traps, fun upgrades, and a new gameplay!

    2024ActionStrategyIndie3.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Elements and build — Steam game cover

    Elements and build

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

    Form your own genre with skills in different elements, use building rewards to build your own unique maze in randomly generated levels, and fight to survive waves of monsters to win

    2024StrategyIndieCasual6.74 USDDeck PlayableSingle-playerSimilar games →