Planned Release Date: 2026

About This Game

The Lost Library is a story puzzle escape-room game that recovers a forgotten study by solving puzzles.

Welcome to The Lost Library! The Library has lost because no one remembers it. 

By collecting stories and refilling the study, you can restore The Lost Library.
Depending on what story you choose, you can play different protagonists, different genres of games.

Stories are all stories of the same world. 

Some stories are directly connected, and at first glance, it seems to be a completely irrelevant story, but there are cases where the rice cakes that are related to each other are hidden.

Solve the puzzle and collect stories from different genres, escape each place and complete your own study!

In the PC extension, you'll find 14 different stories, including nine mobile stories (36 total chapters), as well as new ones in the PC version (5 stories, 24 chapters).

⭐ 382. Cultural Study on the Upper-class of the Kingdom of Natalis
Born as a commoner, orphaned when she was young,

Airan was adopted overnight by the House of Jonstina, the greatest ducal family of the Kingdom of Natalis.

Her adoption was due to her predominating power to control fire as well as the fact her aunt was the duchess.

- My plebian origin does already harm to me, and now my power is banned in the Kingdom?

Airan's turbulent survival in in upper class society.

⭐ 364. The Secret of the Blue Powder

To become a Heart, Airan attends 'Natalis Royal Academy',

on assignment for the country.

Airan fixes the strange case happening in the Duchy of Jonstina.

Airan chases the crime after crime -

How can she terminate these cases?

⭐ 480. Erdentuya Herbshop's Guide to the Summer Festival of the United Kingdom of Bask

The Erden family running a herbal workshop in the village of Tuirum, a small village in Jakzjuv, Basque Kingdom!

As always, while running a herbal workshop, I hear that one team that will participate in the summer festival is gone...

⭐ 840. The Beginning of the Adventure

Erdentuya is a well-doing girl who loves her ordinary everyday life and is not interested in any adventure.

Then some strange things happen in plain Tuirum vilalge.

Give my peaceful village back!

⭐ 866. The First Diary

Even in a magical school exists a beauty queen.

Lia is a hot girl who is the public object of envy in Natalis Royal Academy.

Follow Lia and experience her school life!

👻 266. School Guides

Lia, shortened for Liatris del Albens,

should complete several missions to graduate from Royal Academy.

Lia arrives in Lobelia, the city full of the reports that strange things happen.

What is happening here?

👻 665. Lobelia Survival Guide

All the staff of Lobelia High School exists for the students.

However, if the students do not comply with the rules, they get suspended or expelled.

Those who got suspended or expelled are not regarded as a student of Lobelia High School.

Keep in line and enjoy your time in Lobelia High School.

👻 669. Lobelia Survival Guide: Appendix

1. You can enter the laboratory through the sixth prop room

2. Obtain the necessary materials in the observation room

3. Rescue your colleague from the laboratory

⭐ 594. Fretan Local Cookbook

Ru, a half-elf who ran away from the elf village to find an adventure.

Though she have never experienced human world or ever worked,

she got a job in quite a big restaurant in a port city, Freta,

thanks to the chef who recognized her skill to use knife.

How do I earn money in human world?

🌳 526. The Village in Koivikko Wood

A battle against the dreadful monster after the restaurant!

Ru, wounded during the battle, slowly recollects her memory of the days in the elf village...

What's hidden in the reminiscent lake? Reveal Ru's past in the elf village.

⭐ 539. A Report on the Abnormalities in Fretan Area 3.

Ru was going to leave the city alone.

Her colleagues gave her a good send-off, but...

Where am I? What? This is the place where people who want to die gather? And I am not allowed to leave?

I made a huge mistake.

⚓ 494. The Marine Life Observation Journal

A captain who sails the limitless sea, Penny Pita!

What mystical creature will she meet today?

Only a victor can make their way! Make a marine expedition,

defeating the monsters and unmasking the secret of the islands.

⚓ 454. The Anti-piracy Journal

A suspicious religion, Kanos, is spreading throughout the Kingdom of Natalis.

The port city Freta was not the exception.

The world we are living is just a story? What a bullshit!

And there are pirates based on that religion? Save the ocean from those pirates!

⭐ 219. The Palace under the Sea

Five girls who went drift and end up in the place under the sea.

Despite the difference in their goals and personality, to escape they join hand.

When everyone was surprised to observe the peculiar building,

one girl insists that this place is 'Yong-goong' which appears in her people's bedtime story.