IMHO.

Single-player games like QTI - Quantum Tunnel Idle

Below are 8 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
    MEMOLOGY 2: OLD TIMES — Steam game cover

    MEMOLOGY 2: OLD TIMES

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

    The continuation of the legendary MEMOLOGY series. This time you will have to demonstrate your knowledge of old memes, and prove that you are the based scuf!

    2025SportsIndieSimulation0.71 USDSingle-playerSimilar games →
  8. 8
    Plantera — Steam game cover

    Plantera

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

    In Plantera you build your own garden and watch it grow with new plants, bushes, trees and animals. As you play and expand your garden you will attract Helpers, round blue creatures that will help you with your harvesting tasks.

    2016IndieSimulationCasual2.99 USDDeck VerifiedSingle-playerSimilar games →