IMHO.

Single-player games like fishTDX

Below are 10 single-player Steam games similar to fishTDX, 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 fishTDX page.

Ranked picks

  1. 1
    Core Defence — Steam game cover

    Core Defence

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Casual with fishTDX.

    Core Defence is a tower defence game with roguelike elements. Build towers to defend the Core, unlock new ones and upgrade them, choose from a variety of powerful effects and defeat bosses.

    2023StrategyCasual3.99 USDSingle-playerSimilar games →
  2. 2
    Random Legion — Steam game cover

    Random Legion

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Simulation with fishTDX.

    This is a auto battler game with both casual and strategic attributes.Players will take on the role of the leader, expanding the team, learning talents and skills, strengthening equipment, transforming soldiers and other ways to combat power, breaking through random levels, ultimately to win game.

    2024StrategySimulation5.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    SHOOPER NOVA — Steam game cover

    SHOOPER NOVA

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

    Craft Your Ultimate Circular Fortress! Dive into SHOOPER NOVA, where you choose props and components to build a unique fortress. Unlock combos to shape your strategy and battle style. Become an unstoppable barrage machine and obliterate waves of enemies from all directions!

    2025ActionStrategyIndie2.72 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Centipede Gun — Steam game cover

    Centipede Gun

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

    Centipede Gun is a roguelite autobattler where you create bizzare creatures to face hordes of enemies! Combine different guns, modules and skills to make unique synergies and upgrade your cute little destruction machine!

    2023ActionStrategyIndie2.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Cat God Ranch — Steam game cover

    Cat God Ranch

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Simulation with fishTDX.

    Lead hundreds of "wise" little animals to pay tribute to the Cat God!! 7 animal families, 100+ animals, 10+ Cat Gods, 100+ items, and various animal combinations waiting for you to explore!

    2024StrategyIndieSimulation5.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    ShapeHero Factory — Steam game cover

    ShapeHero Factory

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Simulation with fishTDX.

    In ShapeHero Factory, you’re the engineer of an ever-evolving paint-fuelled factory that spits out magical, shape-based warriors. Send them into battle - to death or glory - then build an even better factory on your next run.

    2025StrategyIndieSimulation23.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Variables 2 — Steam game cover

    Variables 2

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Casual with fishTDX.

    After two years of precipitation, we re-made this variable sequel after thinking about it! Variable 2 is a unique stand-alone tower defense game. We have enriched the building and elements of tower defense, and the experience in the game can be changed according to your ideas!

    2021StrategyIndieCasual14.99 USDSingle-playerSimilar games →
  8. 8
    Necrosmith — Steam game cover

    Necrosmith

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Strategy and Simulation with fishTDX.

    A necromancer simulator. Assemble the dead using different body parts while upgrading your tower, combine the abilities of the different fantastic races to fight your way through the hordes of enemies and overrun the ’chosen ones’. To tell the truth, the dead are pretty, uhm, dumb.

    2022StrategyIndieAdventure2.99 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    bugTDX — Steam game cover

    bugTDX

    Single-player alternative to fishTDX — playable solo, no multiplayer required. Shares Action and Simulation with fishTDX.

    Buy, sell, and merge towers in this tower defense roguelike inspired by Bloons TD6 and Super Auto Pets. With 40+ towers and 15 enemy types, this chill tower defense game provides hours of fun replayability!

    2023ActionIndieSimulation2.99 USDDeck PlayableSingle-playerSimilar games →
  10. 10
    rock[et] — Steam game cover

    rock[et]

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

    NOT JUST ANOTHER INCREMENTAL GAME. Every playthrough is different. Unlock game-changing abilities, invent run-breaking synergies, discover new planets with entirely new mechanics, and much, much more.

    2026ActionStrategyIndieSingle-playerSimilar games →