IMHO.

Single-player games like fishTDX

Below are 9 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
    Defender of Grids — Steam game cover

    Defender of Grids

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

    A pixel-perfect Tower Defense game where defeat is just the beginning. Master the rock-paper-scissors balance of combat, speed up the action with 4x speed, and use your hard-earned XP to unlock powerful permanent skills. Can you hold the line?

    2026StrategyCasualSingle-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
    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 PlayableSingle-playerSimilar games →
  4. 4
    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 →
  5. 5
    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 →
  6. 6
    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 →
  7. 7
    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 →
  8. 8
    The Dungeon Beneath — Steam game cover

    The Dungeon Beneath

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

    The Dungeon Beneath is a tactical rogue-like autobattler. Gather your party and descend into the dungeon, battling your way through room after room of nefarious enemies. Collect powerful artifacts and equipment to create an endless variety of strategies.

    2020StrategyIndie14.99 USDDeck VerifiedSingle-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 →