IMHO.

Single-player games like QTI - Quantum Tunnel Idle

Below are 9 single-player Steam games similar to QTI - Quantum Tunnel Idle, 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 QTI - Quantum Tunnel Idle page.

Ranked picks

  1. 1
    Monster Killcker — Steam game cover

    Monster Killcker

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required.

    Incremental game where you have to kill as many monsters as you can in order to become stronger. Besides, you better make those monsters stronger too so you can get more experience from them.

    2023IndieCasual1.99 USDDeck PlayableSingle-playerSimilar games →
  2. 2
    Neko Chan — Steam game cover

    Neko Chan

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    Neko Chan is the exclusive desktop elf of the STEAM platform, placing her on your desktop to accompany you through every day of your life and work.

    2021IndieSimulationCasual2.99 USDSingle-playerSimilar games →
  3. 3
    Star Clicker Odyssey — Steam game cover

    Star Clicker Odyssey

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    Fight off a galactic threat in this idle clicker game. Battle waves of enemy ships, progress actively or passively, and save humanity. With over 200 high-quality ship models and background mode, watch your fleet soar across your desktop while you work!

    2025StrategyIndieSimulation4.99 USDSingle-playerSimilar games →
  4. 4
    Monster Hunting: Incremental Grind Forever — Steam game cover

    Monster Hunting: Incremental Grind Forever

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    An idle incremental adventure. Fight monsters, buy upgrades, recruit a party, craft equipment, join a faction, battle across different regions, and complete hundreds of rewards. Unlock a variety of fun features and use them to make your numbers go up!

    2024StrategyIndieSimulation4.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Idle Monkeylogy — Steam game cover

    Idle Monkeylogy

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    IDLE GAME based on the Infinite Monkey Theorem

    2021SimulationFree To PlayCasualFreeDeck PlayableSingle-playerSimilar games →
  6. 6
    TrainClicker Idle Evolution — Steam game cover

    TrainClicker Idle Evolution

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    🚂 Cozy idle train game. Enjoy a journey from steam to modern locomotives in idle style! 🚂

    2021StrategyIndieSimulation2.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Idle Spiral — Steam game cover

    Idle Spiral

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    This is a beautiful "Idle", "Incremental" game based on spirals and mathematics. Your goal is to make the spiral grow farther and farther from the origin. The game is very simple, but it is very deep and can be enjoyed for a long time!

    2022StrategyIndieSimulationFreeDeck PlayableSingle-playerSimilar games →
  8. 8
    Fantasy Aquarium — Steam game cover

    Fantasy Aquarium

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required. Shares Simulation with QTI - Quantum Tunnel Idle.

    Fantasy Aquarium offers an effortless way to enhance your gaming experience. You can nurture a diverse range of small fish with unique characteristics and construct a vibrant fantasy world from scratch, transforming mundane fish-keeping into an engaging pursuit.

    2024IndieSimulationCasual2.09 USDDeck PlayableSingle-playerSimilar games →
  9. 9
    Child of Ash — Steam game cover

    Child of Ash

    Single-player alternative to QTI - Quantum Tunnel Idle — playable solo, no multiplayer required.

    The hero who stopped a world-eating calamity was branded a demon by history. Centuries later, an orphan carrying his last fragment pieces the truth together from rumor and record. No combat — only Ashen Flame, a power that costs you with every use. Two loops. One truth.

    AdventureRPGSingle-playerSimilar games →