Screenshots
Watch trailer on Steam ↗Forbidden Ground - Lair of Aooni -
HYDE, Inc. · Published by HYDE, Inc. · Official site ↗
Mixed — 53% positive (58 reviews) · 33 achievements
Last updated 28 Sept 2026
It is a forbidden place that must never be entered. Strange events encountered in the decadent school building. And a Japanese doll that begins to speak. There is something here. ......This is a Japanese horror game that reveals the abominable history hidden in an abandoned school.
£9.29
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Price history
Action, Adventure · 2025 · More £5 - £15 games
Explore an abandoned school where strange occurrences and talking Japanese dolls reveal hidden horrors. Forbidden Ground - Lair of Aooni challenges you to uncover the abominable history in this chilling action-adventure from HYDE, Inc.
About this game
[Game Outline]
This horror adventure game is based on the motif of “Ao-oni” and is set in an abandoned school that still retains the atmosphere of the Showa period (1926-1989).
The player controls Himari, the main character, and Komari, a Japanese doll inhabited by a grudge spirit, as they search for their estranged family and classmates in the school, where blue demons roam.
The past memoirs and records obtained in the school will reveal the horrific events that took place here in the past, and Himari and Komari will escape from the approaching blue demons and rescue everyone. Can Himari and Komari escape the approaching blue demons and rescue everyone in the end? ......
[Story]
In search of their missing parents, the children visit a place called "no-footprints land.
This is the abandoned school “Koshiwa Elementary School,” which emerged from the bottom of a dam that dried up due to the dry season over the past few years.
This area once had a sad history of sinking to the bottom of the water along with the construction of the dam.
One day, some children enter the abandoned school and are drawn there by the sight of their parents who have never returned.
One of them, Himari, stepped off the collapsed rubble and fell, and when she woke up, she was paralyzed and unable to move.
When she opened her eyes in the darkness of the school, she found a Japanese doll speaking to her. Who are you?
After this encounter, Himari and the Japanese doll “Komari,” in which a grudge spirit resides, wander around an abandoned school where the awe-inspiring “Blue Demon” roams.
The adults who have disappeared, records of the past scattered around the abandoned school, the existence of the Blue Demon, there is something about this place. ......
Searching for their missing classmates, “Himari” and “Komari” begin their mission to escape.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: 64-bit Windows 11
- Processor: Intel Core i5-8500
- Memory: 8 GB RAM
- Graphics: NVIDIA GeForce GTX 1050 Ti
- DirectX: Version 12
- Storage: １ GB available space
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
*languages with full audio support
Latest news
AnnouncementsOfficial
Forbidden Ground - Lair of Aooni 1st Anniversary!
Today, August 29, marks one full year since the game's release!To everyone who has supported and followed the adventures of Komari and Himari, thank you so much!Thanks to your encouragement and support, we have been able to celebrate this first anniversary.We hope you'll continue to support both the girls and Forbidden Ground in the future!Read full article on Community Announcements (m-ito)AnnouncementsOfficial
Secret Communication Vol.14
Himari:We’re in Kyushu now.I’m excited to see what awaits us here.Komari:Yeah. It’s like we’ve moved straight into a full-on local food adventure.And speaking of Hitoyoshi City… it has to be ayu simmered in sweet soy sauce.Gifu’s version was delicious too, but I think I like the Hitoyoshi style better.Himari:I think I prefer the flavors from Gifu…For example, Gifu’s simmered ayu really highlights the natural aroma of the fish,while Hitoyoshi’s feels like a bold sweet-and-savory flavor explosion.When you compare them side by side, they’re completely different.Komari:That’s the real joy of moving or traveling—discovering the food.Even when there are worries, just thinking about food makes my heart flutter.After all, it’s entertainment you can experience with all five senses!Himari:So everyone reading Secret Communication,please remember to enjoy the food in your everyday life too!Read full article on Community Announcements (m-ito)AnnouncementsOfficial
Secret Communication – Tango no Sekku(Children’s Day) 2026 Edition
Komari:🎵 Up higher than the rooftops, the carp are flying high—The biggest black carp is the father,The smaller red carp are the children… 🎵Himari:Ah—Komari-chan is singing!!…Come to think of it, the carp streamer song doesn’t mention a mother, does it?Komari:sigh… You caught me again, Himari.…Well, you see, the mother—she’s watching from below, quietly supporting everyone’s efforts.That’s why today is a day to be thankful to mothers.Himari:I see…The dark figure I used to see is gone now.Maybe… that wasn’t my mother after all…Komari:You’re a child your mother protected with her life—there’s no resentment there.I’m sure she’s still supporting you, even now.That’s why you’re able to keep swimming forward.Himari:…Thank you, Komari-chan.Read full article on Community Announcements (m-ito)AnnouncementsOfficial
Secret Communication Vol.13
Komari:Mmm… it smells so good already!All that early-morning effort was totally worth it.Himari:Yeah. Today is Bread Day. The dough has finished fermenting, and it’s baking now.For breakfast… we’re having pull-apart bread! With extra sugar.Komari:Pull-apart bread! Fresh out of the oven… this is heaven.Ahh, that aroma—it’s making my cheeks melt and my eyes feel all tingly…Himari:Everyone reading Secret Communication, what kind of bread do you like?If you’d like, please tell us.Komari:If you’re buying from a shop, I definitely recommend the yakisoba bread from Pan no Seirankō.Read full article on Community Announcements (m-ito)AnnouncementsOfficial
Secret Communication Vol.12
Himari:Komari-chan, today we’re holding a song festival in the Forbidden Ground.You’re all prepared, of course… right?Komari:Huh? I never heard about that…?I didn’t prepare anything… and I’m not very good at singing…Himari:…Just kidding. That was a lie. Today is April Fools’ Day!But you know, your Hinamatsuri song really was lovely.Komari:Geez… that’s a relief.Ah! More importantly—what’s going on with the next Forbidden Ground project?Himari:Well, I did hear that some ideas are being quietly worked on…but who knows?Komari:I wonder if everyone’s support could help move things along.I suppose all we can do is hold on to our hopes and wait, fully prepared…!Read full article on Community Announcements (m-ito)
