IMHO.

Single-player games like Milestone

Below are 8 single-player Steam games similar to Milestone, 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 Milestone page.

Ranked picks

  1. 1
    What Happened to Lily? — Steam game cover

    What Happened to Lily?

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

    What Happened to Lily? Is a real-time first-person horror game. Discover the secrets and spooky truths behind the mysterious event at Miller Farm.

    2025IndieAdventureCasual3.99 USDSingle-playerSimilar games →
  2. 2
    EXPEDITION TO THE BACKROOMS — Steam game cover

    EXPEDITION TO THE BACKROOMS

    Single-player alternative to Milestone — playable solo, no multiplayer required. Shares Action and Adventure with Milestone.

    You are the exploration team from company Async, you arrive to reported anomaly place and searching for anomalies, but what would you find? Prepare yourself for a gripping and heart-pounding adventure in EXPEDITION TO THE BACKROOMS, where every step could be your last.

    2025ActionIndieAdventure5.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Mundaun — Steam game cover

    Mundaun

    Single-player alternative to Milestone — playable solo, no multiplayer required. Shares Action and Adventure with Milestone.

    Mundaun is a lovingly hand-penciled horror tale set in a dark, secluded valley of The Alps. Explore various areas full of secrets to discover, survive hostile encounters, drive vehicles, fill your inventory, and solve a variety of handcrafted puzzles.

    2021ActionIndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  4. 4
    Everything Is For Humanity — Steam game cover

    Everything Is For Humanity

    Single-player alternative to Milestone — playable solo, no multiplayer required. Shares Action and Adventure with Milestone.

    Everything is for Humanity is a story-driven, exploration and puzzle-solving based science fiction horror game which sets in a massive science facility in 2020. You will discover tons of things and find out about the blood-chilling truths with its first-person experience.

    2022ActionIndieAdventure14.99 USDSingle-playerSimilar games →
  5. 5
    [Chilla's Art] Okaeri | おかえり — Steam game cover

    [Chilla's Art] Okaeri | おかえり

    Single-player alternative to Milestone — playable solo, no multiplayer required. Shares Action and Adventure with Milestone.

    Okaeri is a VHS Japanese psychological horror game about a middle school girl and her mother who recently moved to a new house.

    2019ActionIndieAdventure2.99 USDDeck PlayableSingle-playerSimilar games →
  6. 6
    Shift 87 — Steam game cover

    Shift 87

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

    Your task today: Memorize your environment and report any anomalies. Good luck with your shift! "Shift 87" is an observation horror game with subtle anomalies and unsettling occurrences.

    2024IndieAdventureCasual4.99 USDDeck VerifiedSingle-playerSimilar games →
  7. 7
    Gray Dawn — Steam game cover

    Gray Dawn

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

    Embark on a terrifying adventure of a priest accused of murdering an altar boy. Gray Dawn is a psychological thriller infused with religious elements and combines story-driven quests with an artistic experience.

    2018IndieAdventure19.99 USDDeck VerifiedSingle-playerSimilar games →
  8. 8
    Homesick — Steam game cover

    Homesick

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

    Explore an abandoned building, encountering puzzles and clues to discover what happened, as you try to escape in both your nightmares and the waking world. Be immersed in the hauntingly beautiful 3D atmosphere in this puzzle exploration mystery game.

    2015IndieAdventure14.99 USDSingle-playerSimilar games →