IMHO.

Single-player games like One Tower Defense

Below are 8 single-player Steam games similar to One Tower Defense, 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 One Tower Defense page.

Ranked picks

  1. 1
    Slorbis: Tower Defense — Steam game cover

    Slorbis: Tower Defense

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Immerse yourself in the cozy, minimalist world of Slorbis: Tower Defense. Build towers with unique roles, buy modifiers of varying rarities, collect money, and face the unpredictability of procedurally generated maps as you defend the king from dark spirits.

    2026StrategyIndieCasual4.99 USDSingle-playerSimilar games →
  2. 2
    Lines of Battle — Steam game cover

    Lines of Battle

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Command armies in tactical battles with simultaneous turns during the Napoleonic Wars. Lead forces through single-player strategy campaigns, master formations and flanking tactics, then test your skills in competitive 1v1 and 4v4 battles.

    StrategyIndieCasualSingle-playerSimilar games →
  3. 3
    Dimension Defenders — Steam game cover

    Dimension Defenders

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with One Tower Defense.

    Tower Defense Redefined. Race friends in ranked 1v1, defend together in 2-player co-op, or solo your way through dimensions of escalating chaos.

    ActionStrategyIndieSingle-playerSimilar games →
  4. 4
    Seed World — Steam game cover

    Seed World

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Seed World is a game that aims to combine automation, conveyor belts, and level progression. The game simplifies automation 'construction' into a series of progress bars, with each progress producing or consuming resources, and players need to manage resources.

    2025StrategyIndieSimulation2.99 USDSingle-playerSimilar games →
  5. 5
    Tower Survivors — Steam game cover

    Tower Survivors

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Action and Strategy with One Tower Defense.

    'Tower Survivors' is a dark fantasy survival RTS where you must survive, upgrade and defend humanity against massive unending armies from Anubis Tomb, Jurassic Valley and Vampire Monastery. Set in three different empires hell-bent on your destruction, it’s not if you can survive, but how long.

    ActionStrategyIndieSingle-playerSimilar games →
  6. 6
    rymdkapsel — Steam game cover

    rymdkapsel

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Build a space station. Command the tiny crew. Explore the galaxy. A meditative space strategy game.

    2014StrategyIndie7.99 USDSingle-playerSimilar games →
  7. 7
    Clutchtime™: Basketball Deckbuilder — Steam game cover

    Clutchtime™: Basketball Deckbuilder

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Build your perfect deck and become a Champion.

    2025SportsStrategyIndie9.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Element TD 2 - Tower Defense — Steam game cover

    Element TD 2 - Tower Defense

    Single-player alternative to One Tower Defense — playable solo, no multiplayer required. Shares Strategy and Indie with One Tower Defense.

    Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.

    2021StrategyIndie5.99 USDDeck PlayableSingle-playerSimilar games →