
Screenshots

Watch trailer on Steam ↗The Lost Study
SONAK : Story Design Project · Published by SONAK : Story Design Project · Official site ↗
Last updated 28 Sept 2026
A forgotten study. Lost because no one remembers it. Solve puzzles, recover stories, and restore it — one chapter at a time. 14 stories, 14 worlds. Cozy, eerie, funny, and strange. They seem completely unrelated. Until they're not.
Adventure, Indie · 2027 · More free games
Explore The Lost Study, where solving quirky riddles unravels mysterious stories. Each chapter brings new worlds to uncover in this cozy yet unsettling adventure game from 2027.
About this game
The Lost Study — a story puzzle escape room.
Restore a long-forgotten study by solving puzzles, collecting stories, and refilling its shelves.
Fourteen tales. Five protagonists. One world.
What you're doing changes with the story. Escaping a room. Running a place. Chasing a mystery. Just going somewhere.
Some stories connect openly.
Others seem unrelated until you look closer and find the thread running between them.
Over 60 chapters across 14 stories, 3 to 5 chapters each.


🔥 382. Cultural Study on the Upper-class of the Kingdom of Natalis
Born a commoner, orphaned young.
Then, overnight, the House of Jonstina — the greatest ducal family in the Kingdom of Natalis — took her in.
Two reasons. Her aunt is the duchess, and Airan can command fire.
My common birth already counts against me. And now my power's banned as well?
Airan's turbulent survival in upper-class society.
🔍 364. The Secret of the Blue Powder
Airan attends the Natalis Royal Academy to become a Heart — the magic-wielding class of the four — carrying out assignments for the crown along the way.
Strange incidents in the Duchy of Jonstina.
One crime leading into the next. Where does it end?


🎊 480. Erdentuya Herbshop's Guide to the Summer Festival of the United Kingdom of Bask
The Erden family, running a herbshop in the small village of Toirom, in Zaxjuv District, the United Kingdom of Basque!
Then, in the middle of another ordinary day at the shop,
word comes that one of the teams entering the summer festival has gone missing…
🌿 840. The Beginning of the Adventure
Erdentuya — a kind-hearted girl who loves her ordinary life and has no interest in adventure.
Strange things keep happening in the perfectly ordinary village of Toirom.
Why are there sheep floating in the sky…? I just want my peace and quiet 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 has never experienced human world or ever worked,
she lands a job at a well-known 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 secrets lie within the lake of memories? 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 rubbish!
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.
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7
- Processor: Intel Core i3 2.00 GHz
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce 450
- Storage: 2 GB available space
Recommended
- OS *: Windows 7
- Processor: Intel Core i3 2.00 GHz
- Memory: 4 GB RAM
- Graphics: NVIDIA GeForce 450
- Storage: 2 GB available space
Supported Languages
Latest news
AnnouncementsOfficial
[Record] The Voyage Log of a Freta Navy Captain 📖
Hello everyone, this is Guri, the Viral Content Art Designer for the SONAK: Story Design Project. I create art for various viral content pieces to share the charm of The Lost Study with even more people.In our last record, we took a look at young Penny's picture diary and got a glimpse of her curious, wide-eyed childhood as she dreamed of the sea. This time, another record has been discovered in a corner of the Study — one that shows Penny all grown up. ⚓The little girl who once drew everything she saw at sea... just how has she grown up?📝 Penny's Voyage LogThis is the voyage log of Penny, now a captain leading her own ship in the Freta Navy! From the condition of the warship to the destination of the next route and everything that happened along the way, it's all recorded with meticulous care. 👀 What makes it even more delightful is that, even within these professional records, you can still feel the same curiosity about the sea and the innocent charm that she had as a child. ☺️📅 Next Page PreviewSo far, we've explored various records containing the stories of Airan, Erdentuya, and now Ru and Penny. The more you get to know these characters, the more curious you must be about the world of The Lost Study, right?And we have some exciting news to share! The demo version of The Lost Study will be released on Steam this September. 🎉 We'll be sharing more detailed news about the demo — including which stories you'll get to experience firsthand — on the Steam Community board in two weeks.I'll see you again in the Study in two weeks.Sincerely, GuriRead full article on Community Announcements (sonaksdp)AnnouncementsOfficial
[Record] Two Girls Who Love the Sea and Adventure: Penny & Ru 👭⛵️
Hello everyone, this is Guri, the Object Illustrator for the SONAK: Story Design Project. I design the items and objects tucked away throughout the Study, adding small traces of story to every corner. In our last record, we shared the story of how Ru — trapped on a contaminated beach — happened to meet Penny, who was visiting the island by chance, and made her escape with her help. Ru had planned to reveal that she was a half-elf, but Penny’s unexpected remark stopped her from saying it! 😂 Will these two truly come to trust each other and become real friends? While looking through the Study, we happened to discover some photos thatgive us a closer look at their story. Shall we take a look together?📸 Penny & Ru's Photo Profile Photo profiles featuring Penny and Ru in all kinds of moments! From Ru saying farewell to the staff of the Sapidus Restaurant, to Penny freely sailing across the vast ocean — each photo captures a piece of their everyday life and adventures, making it all the more delightful to look through. ☺️📝 Little Penny's Picture Diary A picture diary filled with colorful sea creatures in every shape and hue. Perhaps she drew the creatures she saw with her own eyes, following her mother across the seas? Her curious gaze and the still-unpolished drawing style really convey the pure heart of young Penny. 💕📅 Next Page Preview If today we peeked into young Penny's picture diary, in two weeks we'll be looking at the Voyage Log kept by Penny herself — now a little more grown up. Look forward to seeing how a child's doodles evolved into something more, over the passage of time. ⚓📖 I'll see you again in the Study in two weeks. SONAK: Story Design Project Sincerely, GuriRead full article on Community Announcements (sonaksdp)AnnouncementsOfficial
[Record] A New Friend, Penny Pita ⚓
Hello everyone, this is Guri, the Character Skin Artist for the SONAK: Story Design Project. I work on creating character skins so that the protagonists of the Study can transform into all kinds of new looks.It's the end of July, and the sweltering heat just won't quit. Last week, we shared the story of Ru arriving at the contaminated beach during her adventure. Everyone assumed she came there to end her life — but the truth is, she was simply lost and stumbled upon it by accident! 😂 Pure-hearted and a bit of a lovable klutz, can Ru safely find her way out of this dangerous beach?🎨 Webtoon: Arriving at the Beach Where Entering the Water Means Death (Part 2)※ This webtoon was created in a separate art style for storytelling purposes, and may differ from the actual in-game artwork.📖 About PennyPenny Pita is the protagonist of three tales from The Lost Study's fourteen stories: '539. Freta District 3: Anomaly Report', '494. The Marine Life Observation Journal', and '454. The Pirate Hunting Log'.With her easygoing yet fearless personality, she's the complete opposite of Ru in every charming way. Though she's the shortest of all the protagonists in the Study, she sails the seas more bravely than anyone else. ⚓ (Between us, she’s actually my personal favorite character in the game! 🤫)📅 Next Page PreviewRu and Penny left the island together and became friends! Word has it they've grown close enough to take a photo together already. 📸On top of that, we've also discovered a picture diary that Penny has been keeping since childhood. Aren't you already curious about the memories tucked inside?In two weeks, we'll be sharing Ru and Penny's photo profiles along with Penny's childhood picture diary.I'll see you again in the Study in two weeks. 🌊Sincerely, GuriSONAK: Story Design ProjectRead full article on Community Announcements (sonaksdp)AnnouncementsOfficial
[Record] Ru's Beach Escape Adventure 🔍
Hello everyone, this is Guri, the Character Artist for the SONAK: Story Design Project. I work on making the characters of the Study feel more alive.With sudden showers pouring one after another in the second week of July, the rainy season is officially in full swing. 🌧️ Doesn't this kind of weather feel perfect for eerie and mysterious tales? In our last record, we introduced Ru — the elf who left her village longing for the wider world. As it turns out, there was more information about her tucked away with the missing person flyer. Shall we take a look together?📖 About RuRu Virtanen is the protagonist of three tales from The Lost Study's fourteen stories: '594. 100 Traditional Dishes of Freta', '526. A Sea Bloomed in the Forest', and '539. Freta District 3: Anomaly Report'. Though she may come across as cold and aloof at first, she actually has one of the most gentle and warm hearts of all — a charming contrast that makes her all the more endearing. 💙🎨 Webtoon: Arriving at the Beach Where Entering the Water Means Death (Part 1)Based on '539. Freta District 3: Anomaly Report' — the story where Ru takes center stage — we've created a webtoon that leads up to the moment she arrives at the mysterious beach!※ This webtoon was created in a separate art style for storytelling purposes, and may differ from the actual in-game artwork.📅 Next Page PreviewIn two weeks, I'll return with Part 2 of Arriving at the Beach Where Entering the Water Means Death!A contaminated beach that no one can escape once they've stepped foot on it — will Ru manage to find her way out safely?And just as Ru finds herself lost, a spirited girl named Penny makes her entrance. Who exactly is this girl who sails the seas so freely? 🧐I'll see you again in the Study in two weeks. 🌊Sincerely, GuriSONAK: Story Design ProjectRead full article on Community Announcements (sonaksdp)AnnouncementsOfficial
[Record] The Secret of Ru, the Mysterious Girl 🔍
Hello everyone, this is Guri, the Background Art Illustrator for the SONAK: Story Design Project. I work on the background art that helps you immerse yourself even deeper into the world of the Study. Starting this week, following Chelly, I'll be sharing the story of Ru — a girl who set sail in search of adventure across the wider world. 💪Before we know it, the hot days of July are right around the corner. On days like these, don't you ever feel like escaping to the cool sea? 🌊 Here, we have a girl who longed for the world beyond the ocean and left her village behind. It seems she may have departed without telling the adults, as a missing person flyer was found posted right at the Study's door. Shall we take a look together?📜 Ru's Missing Person FlyerAmong all the characters in The Lost Study, Ru appears to be the tallest and most mature-looking character. — yet in her own village, she's actually the youngest and one of the shortest. Just how long do elves live, anyway? 🧐 As it happens, a book that can answer this very question — Introduction to Species Studies — is sitting on the bookshelf. Shall we read it together?📖 Introduction to Species StudiesElves live for at least a hundred years and dwell deep in the forests, far from humans. I remember pouring my heart into capturing the secretive and mystical scenery of their village. 🖌✨️📅 Next Page PreviewIn two weeks, I'll be sharing the story of Ru as she runs into trouble during her adventures. Ru steps onto a beach from which no one can ever return... what could be happening in this strange place?And another protagonist will be joining us — Penny, who freely sails across the seas. Two girls who both love the ocean… Somehow, I can already feel my heart racing with excitement. 💓I'll see you again in the Study in two weeks. 🐋Sincerely, GuriSONAK: Story Design ProjectRead full article on Community Announcements (sonaksdp)






