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

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.
- 2

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.
- 3

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.
- 4

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.
- 5

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.
- 6

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.
- 7

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.
- 8

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!
- 9

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.
- 10

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!
- 11

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…?