IMHO.

Single-player games like IINTWO

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

Ranked picks

  1. 1
    IIN — Steam game cover

    IIN

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

    IIN is a puzzle platformer where you are a soul that controls cubes, overcoming challenges to bring them to the portal which is their goal.

    2018IndieCasual2.99 USDSingle-playerSimilar games →
  2. 2
    Wirm — Steam game cover

    Wirm

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

    Take a worm on a tiny adventure through this delightfully wiggly physics platformer :)

    2025IndieAdventureSimulation6.99 USDDeck VerifiedSingle-playerSimilar games →
  3. 3
    Tiny Brains — Steam game cover

    Tiny Brains

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

    "Tiny Brains" is a cooperative action puzzler that follows four super-powered lab animals in their attempt to escape a mad scientist's experiments. In this joyously chaotic multiplayer game, the four "Tiny Brains" must combine their unique physics-based powers to navigate through a trick-ridden maze.

    2013ActionIndieAdventure9.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    PHOGS! — Steam game cover

    PHOGS!

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

    In PHOGS! you play as a duo of dogs on a captivating, puzzle-filled adventure. Linked by a stretchy belly, you’ll need to bark, bite and bounce your way through obstacles set across the themed worlds of Food, Sleep and Play, in co-op or single-player.

    2020IndieAdventureCasual24.99 USDDeck VerifiedSingle-playerSimilar games →
  5. 5
    Human Fall Flat — Steam game cover

    Human Fall Flat

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

    Human Fall Flat is a hilarious, light-hearted platformer set in floating dreamscapes that can be played solo or with up to 8 players online. Free new levels keep its vibrant community rewarded.

    2016IndieAdventureSimulation5.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    Trine 2: Complete Story — Steam game cover

    Trine 2: Complete Story

    Single-player alternative to IINTWO — playable solo, no multiplayer required. Shares Indie with IINTWO.

    Three Heroes make their way through dangers untold in a fairytale world, featuring physics-based puzzles, beautiful sights and online co-op.

    2013ActionIndieAdventure19.99 USDDeck PlayableSingle-playerSimilar games →
  7. 7
    Heavenly Bodies — Steam game cover

    Heavenly Bodies

    Single-player alternative to IINTWO — playable solo, no multiplayer required. Shares Indie with IINTWO.

    Wrangle the hands and arms of a 1970s space cosmonaut and push, pull and twist your way through an increasingly precarious range of physically simulated stellar scenarios, where without gravity, nothing is still, nothing is secure, and nothing is simple.

    2021ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Gaucho and the Grassland — Steam game cover

    Gaucho and the Grassland

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

    LIVE like a LATIN COWBOY as you EXPLORE, HELP others, and bring HARMONY between HUMANS and MYSTICAL BEINGS in a RELAXING COZY ADVENTURE.

    2025IndieAdventureSimulation19.99 USDDeck VerifiedSingle-playerSimilar games →
  9. 9
    Goroons — Steam game cover

    Goroons

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

    GOROONS is a teamwork-based adventure where you have to combine your unique skills and overcome tough-as-nails puzzle challenges.

    2018IndieCasual2.99 USDSingle-playerSimilar games →