IMHO.

Single-player games like Once Upon an All Hallow's Eve

Below are 11 single-player Steam games similar to Once Upon an All Hallow's Eve, 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 Once Upon an All Hallow's Eve page.

Ranked picks

  1. 1
    The Thing With Mistletoes — Steam game cover

    The Thing With Mistletoes

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    A cute Christmas otome dating sim.

    2017SimulationFreeDeck VerifiedSingle-playerSimilar games →
  2. 2
    Hatoful Boyfriend — Steam game cover

    Hatoful Boyfriend

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    Congratulations! You’ve been accepted as the only human student at the prestigious St. PigeoNation’s Institute, a school for talented birds! Roam the halls and find love in between classes as a sophomore student at the world’s greatest pigeon high school.

    2014IndieSimulationCasual9.99 USDDeck PlayableSingle-playerSimilar games →
  3. 3
    Seduce Me the Otome — Steam game cover

    Seduce Me the Otome

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    A romantic comedy visual novel centered around a girl named Mika Anderson, who gets entangled in the affairs of incubi.

    2015SimulationCasualFreeDeck PlayableSingle-playerSimilar games →
  4. 4
    Nameless ~The one thing you must recall~ — Steam game cover

    Nameless ~The one thing you must recall~

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    Nameless ~The one thing you must recall~ is a visual novel game designed for female audiences. It was distributed by the publisher, Cheritz, in English, Korean, and Japanese on Nov. 11th, 2013 and now it is available on Steam.

    2014Simulation29.99 USDDeck PlayableSingle-playerSimilar games →
  5. 5
    Dandelion - Wishes brought to you - — Steam game cover

    Dandelion - Wishes brought to you -

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    Dandelion -Wishes brought to you- is a female-oriented game developed by Cheritz. The game was released in South Korea in August, 2012. The English translation for Dandelion was released on Nov, 2012. Dandelion is known as a unique dating simulation with a sensational storyline and charming characters.

    2014Simulation29.99 USDDeck VerifiedSingle-playerSimilar games →
  6. 6
    Nicole — Steam game cover

    Nicole

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    Excited to join her first choice school, Nicole discovers a disturbing series of disappearances on campus upon moving into the university dorms. Three girls have vanished, and she might be next, deviating from her ideal college experience.

    2014AdventureSimulationCasual18.99 USDSingle-playerSimilar games →
  7. 7
    Royal Alchemist — Steam game cover

    Royal Alchemist

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    Intrigue, betrayal, deaths! An Otome / BxB survival Raising Simulation in a high-fantasy royal court setting with RPG elements.

    2020StrategySimulationRPG19.99 USDSingle-playerSimilar games →
  8. 8
    Love Spell: Written In The Stars - a magical romantic-comedy otome — Steam game cover

    Love Spell: Written In The Stars - a magical romantic-comedy otome

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required. Shares Simulation with Once Upon an All Hallow's Eve.

    After saving the life of a mysterious old woman, a young girl is gifted a magical spell book with the power to make anyone whose name she writes inside of it fall madly in love with her until the next full moon. "Love Spell" is a romantic-comedy otome game full of magic, laughs & cute penguins!

    2020IndieSimulationCasual18.99 USDSingle-playerSimilar games →
  9. 9
    Trick & Treat — Steam game cover

    Trick & Treat

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required.

    Trick or treating in a vampire's house.Trick & Treat is a light-hearted Halloween adventure. It's about exploring and solving puzzles in a spooky atmosphere. There will be some horror elements, romance, many bad ends and a happy ending of true love.

    2016IndieAdventureFree To PlayFreeDeck PlayableSingle-playerSimilar games →
  10. 10
    Date Warp — Steam game cover

    Date Warp

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required.

    Five days ago, Janet left her dorm to go on a date - and never came back. Was she kidnapped? Murdered? The truth may be even stranger. Solve puzzles to connect together pieces of the story in a science-fiction adventure with eleven possible endings!

    2014IndieAdventure2.99 USDSingle-playerSimilar games →
  11. 11
    Cinderella Phenomenon: Evermore — Steam game cover

    Cinderella Phenomenon: Evermore

    Single-player alternative to Once Upon an All Hallow's Eve — playable solo, no multiplayer required.

    What happens after Happily Ever After…?

    2021IndieCasual9.99 USDSingle-playerSimilar games →