IMHO.

Single-player games like Millumi

Below are 9 single-player Steam games similar to Millumi, 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 Millumi page.

Ranked picks

  1. 1
    Railway Routes — Steam game cover

    Railway Routes

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

    Guide trains, build tracks, and solve relaxing grid-based railway puzzles. Plan the perfect route across 100+ handcrafted levels and watch your railway come to life.

    2026StrategyIndieCasual3.99 USDSingle-playerSimilar games →
  2. 2
    Koi Zen: Opposite Colors — Steam game cover

    Koi Zen: Opposite Colors

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

    Immerse yourself in a vibrant and tranquil puzzle game, featuring elegant koi fish to enhance your gameplay. Take control of both the white and black pieces to paint the board with amazing colors.

    2023Casual2.99 USDSingle-playerSimilar games →
  3. 3
    Munchy Mammals — Steam game cover

    Munchy Mammals

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

    Munchy Mammals is a tricky puzzle game about strategy, snacking, and survival. Guide adorable animals of various lengths as they munch on fruit—and sometimes each other—to squeeze into their hiding spots!

    2023IndieCasual4.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Steps To The Stars — Steam game cover

    Steps To The Stars

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

    A single player puzzle game following the journey of two stars as they climb to return to the constellation from which they have fallen.

    2026IndieAdventureCasualSingle-playerSimilar games →
  5. 5
    Don't Push TOO Hard — Steam game cover

    Don't Push TOO Hard

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

    A relaxing yet challenging Sokoban-style puzzle game. Push crates, plan ahead, and avoid dead ends. Discover clever mechanics like emotion-driven crates and solve increasingly complex puzzles across unique environments.

    StrategyIndieCasualSingle-playerSimilar games →
  6. 6
    Busway Islands - Puzzle — Steam game cover

    Busway Islands - Puzzle

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

    Busway Islands is a puzzle game about organizing roads and rails across a large archipelago. Your goal is to create a safe and efficient route between bus stations, ensuring that all passengers are picked up along the way.

    2023IndieCasual2.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Cubic Blitz — Steam game cover

    Cubic Blitz

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

    Cubic Blitz is an isometric puzzle game where you control a cube and solve loads of hand-crafted levels. With the power of paint, sponges, and much more, your task is simple: PAINT THE WORLD.

    2026IndieCasualSingle-playerSimilar games →
  8. 8
    Yugo Puzzle — Steam game cover

    Yugo Puzzle

    Single-player alternative to Millumi — playable solo, no multiplayer required.

    Yugo Puzzle is a minimalist, relaxing, and satisfying puzzle game. Move jelly blocks left and right to merge them with the same color. It may sound simple, but it’s deceptively challenging. Enjoy the satisfaction of solving each puzzle.

    2021Indie5.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Dampf - The Cozy Tower Defense — Steam game cover

    Dampf - The Cozy Tower Defense

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

    Cozy tower defense meets stylistic futuristic steampunk. Manage resources, buildings & towers. Unlock perks to further specialize yourself. Plan your defense & survive all enemy waves.

    2024StrategyIndieCasual4.99 USDSingle-playerSimilar games →