IMHO.

Free games like Swarm Survivor: Endless Siege

Below are 9 free-to-play Steam games similar to Swarm Survivor: Endless Siege, 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 Swarm Survivor: Endless Siege page.

Ranked picks

  1. 1
    Bongo Cat — Steam game cover

    Bongo Cat

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie with Swarm Survivor: Endless Siege.

    Bongo cat needs your help. Bongo cat needz more hatz!!! Every time you press a key, Bongo cat will punch your taskbar. Type, click, play, work to collect more points. Which hats will you find?

    2025IndieSimulationMassively MultiplayerFreeDeck PlayableFree to playSimilar games →
  2. 2
    NGU IDLE — Steam game cover

    NGU IDLE

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie with Swarm Survivor: Endless Siege.

    NGU Idle is a Free To Play Idle game that's full of weird humor, tons of upgrades and hundreds of hours of content! Try out NGU Idle today and experience the joy of Numbers Going Up!

    2019IndieAdventureSimulationFreeDeck PlayableFree to playSimilar games →
  3. 3
    Awaria — Steam game cover

    Awaria

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie with Swarm Survivor: Endless Siege.

    Awaria is a short game about working in haunted maintenance tunnels.

    2024ActionIndieFree To PlayFreeDeck PlayableFree to playSimilar games →
  4. 4
    Magic Archery — Steam game cover

    Magic Archery

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie and RPG with Swarm Survivor: Endless Siege.

    Train a commoner to become the greatest archer in this short incremental game! Increase your stats, gather wealth from quests, buy upgrades, and infuse your arrows with magic.

    2024IndieSimulationRPGFreeDeck PlayableFree to playSimilar games →
  5. 5
    Eternal Senia — Steam game cover

    Eternal Senia

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie and RPG with Swarm Survivor: Endless Siege.

    Thoughts and expectations ARPG

    2015ActionIndieRPGFreeFree to playSimilar games →
  6. 6
    Disfigure — Steam game cover

    Disfigure

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie with Swarm Survivor: Endless Siege.

    Disfigure is a grim-dark action rogue-like where you battle relentless hordes of monsters lurking in the shadows. Unlock powerful weapons, craft god-like builds with hundreds of upgrades, slay colossal bosses, and push your limits in intense 20–30 minute survival runs!

    2023ActionIndieFreeDeck PlayableFree to playSimilar games →
  7. 7
    The Lab — Steam game cover

    The Lab

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window.

    Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!

    2016Free To PlayFreeFree to playSimilar games →
  8. 8
    Silly Linguine Cat Simulator Deluxe Online — Steam game cover

    Silly Linguine Cat Simulator Deluxe Online

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Indie and RPG with Swarm Survivor: Endless Siege.

    Silly Linguine Cat Simulator Deluxe Online is a clicker game where progression is replaced with gambling, where the goal is simply to collect the rarest silly linguine cats.

    2026IndieAdventureSimulationFreeFree to playSimilar games →
  9. 9
    Slime Trader — Steam game cover

    Slime Trader

    Free-to-play alternative to Swarm Survivor: Endless Siege — no purchase or trial window. Shares Strategy and Indie with Swarm Survivor: Endless Siege.

    Summon, place, and merge slimes to stop the larvae pouring from the pen. Collect 111 slimes across 12 grades from F to XXX, grow through runes and rebirths, trade eligible Steam Inventory items, and climb the stage leaderboard in this casual pixel-art horde defense game.

    2026StrategyIndieSimulationFreeFree to playSimilar games →