IMHO.

Single-player games like Subject A-119

Below are 8 single-player Steam games similar to Subject A-119, 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 Subject A-119 page.

Ranked picks

  1. 1
    Labyrinth of Chaos — Steam game cover

    Labyrinth of Chaos

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure with Subject A-119.

    Medieval first-person game with dungeons and puzzles

    2022ActionIndieAdventure5.99 USDSingle-playerSimilar games →
  2. 2
    Robes & Wrinkles — Steam game cover

    Robes & Wrinkles

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    You have been betrayed... Climb your tower, reclaim your throne and show that good-for-nothing apprentice whose boss in this first-person, physics-based power-fantasy game! Let none escape your wrath, even the rats...

    2025ActionAdventureCasual4.99 USDSingle-playerSimilar games →
  3. 3
    Mind Mirror — Steam game cover

    Mind Mirror

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    Help Omar on his journey through this puzzle experiment! Logical deductions and problem solving skills will be tested in this sci-fi puzzle environment. Let’s combine puzzle, exploration and escape room elements. Play with your friends!

    2020IndieAdventureCasual9.99 USDSingle-playerSimilar games →
  4. 4
    Backroom Beyond — Steam game cover

    Backroom Beyond

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    Backroom Beyond is a first-person game that mixes puzzles with platforms in a dark, harrowing environment that makes the player question the protagonist's sanity. Based on the internet myth, Backroom Beyond makes the player wonder if that journey is about something more personal.

    2022ActionIndieAdventure3.99 USDSingle-playerSimilar games →
  5. 5
    Escape First Alchemist ⚗️ — Steam game cover

    Escape First Alchemist ⚗️

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure with Subject A-119.

    First-person escape game, playable solo or co-op with up to 4 people. Solve riddles of a reclusive alchemist that trapped you in his workshop. Brew potions and overcome challenges as he laughs at your failures and makes light of your successes...But what if things are not what they seem?

    2023ActionSportsIndie9.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Alchemist: Journey of the Soul Prologue — Steam game cover

    Alchemist: Journey of the Soul Prologue

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    First-person escape room game. Use your magical abilities to solve puzzles or navigate through areas! Explore, use items, brew potions and unlock your full alchemical potential. Are you willing to do what it takes to claim a soul of your own?

    2025AdventureFree To PlayCasualFreeSingle-playerSimilar games →
  7. 7
    Machinika: Atlas — Steam game cover

    Machinika: Atlas

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    Machinika: Atlas is an indie puzzle game and is the direct sequel to Machinika: Museum, you play as a museum researcher who just land on Atlas. Will you unravel the mysteries of the alien vessel? Solve cryptic puzzles to find out what happened!

    2024IndieAdventureCasual11.99 USDDeck PlayableSingle-playerSimilar games →
  8. 8
    Moon Mystery — Steam game cover

    Moon Mystery

    Single-player alternative to Subject A-119 — playable solo, no multiplayer required. Shares Adventure and Casual with Subject A-119.

    The Moon's haunted - and when an astronaut loses contact with Earth, the adventure begins in full. Fill up your oxygen, load up the guns, and set out on an interstellar FPS adventure across the stars, filled with puzzles, fights, exploration, and strange secrets of the universe.

    2024ActionAdventureCasual19.99 USDDeck PlayableSingle-playerSimilar games →