IMHO.

Free games like Old School Tower Defense

Below are 9 free-to-play Steam games similar to Old School Tower Defense, 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 Old School Tower Defense page.

Ranked picks

  1. 1
    Magic Archery — Steam game cover

    Magic Archery

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window.

    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 →
  2. 2
    Eternal Senia — Steam game cover

    Eternal Senia

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window.

    Thoughts and expectations ARPG

    2015ActionIndieRPGFreeDeck PlayableFree to playSimilar games →
  3. 3
    Landfall Archives — Steam game cover

    Landfall Archives

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Strategy with Old School Tower Defense.

    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 →
  4. 4
    Samorost 1 — Steam game cover

    Samorost 1

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Casual with Old School Tower Defense.

    Explore the beginnings of the Samorost series in the space gnome’s original bite-sized adventure, formerly released in 2003. Now with remastered sounds, enhanced graphics, and new music by Floex.

    2021IndieAdventureCasualFreeFree to playSimilar games →
  5. 5
    Die in the Dungeon: Origins — Steam game cover

    Die in the Dungeon: Origins

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Strategy with Old School Tower Defense.

    Fight your way through a mysterious dungeon in this deck-building, turn-based roguelike game where you don't use cards, but DICE! Deal with enemies by combining dice on your board, boost their effects with magical relics, and discover the story behind Die in the Dungeon!

    2023StrategyIndieRPGFreeDeck VerifiedFree to playSimilar games →
  6. 6
    Epic Battle Fantasy 3 — Steam game cover

    Epic Battle Fantasy 3

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window.

    Epic Battle Fantasy 3 is a silly turn-based JRPG, full of useless NPCs, rabid cats, childish humor, unreasonably large weapons, anime boobs, and other nonsense. And it's totally free!

    2016IndieAdventureRPGFreeDeck PlayableFree to playSimilar games →
  7. 7
    The Riftbreaker: Prologue — Steam game cover

    The Riftbreaker: Prologue

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Strategy with Old School Tower Defense.

    The Riftbreaker: Prologue allows you to experience the events taking place before the story campaign of the main game. Explore an entirely new world. Gather resources. Build up a base. Defend yourself from thousands of alien creatures.

    2020ActionStrategyIndieFreeDeck PlayableFree to playSimilar games →
  8. 8
    Mizi NO! — Steam game cover

    Mizi NO!

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Casual with Old School Tower Defense.

    In this free 2D puzzle game, you must reassemble broken objects that your cat has knocked over.

    2024IndieCasualFreeDeck PlayableFree to playSimilar games →
  9. 9
    East Defense — Steam game cover

    East Defense

    Free-to-play alternative to Old School Tower Defense — no purchase or trial window. Shares Strategy with Old School Tower Defense.

    East DefenseYour duty is to protect the castle by strategically building & upgrading towers to stop monsters from coming their way!

    2024StrategyIndieFree To PlayFreeFree to playSimilar games →