"Blue Demon: The Mystery of Blueberry Hot Spring," DLC Release Date Set for October 30; Trailer Reveals New Look at the Blue Demon
Note: the original Japanese article can be found at:
https://www.4gamer.net/games/889/G088926/20251003036/
Editorial Department: Akasaka | 2025/10/03 09:12 (UTC)
LiTMUS and Game Studio today (October 3, 2025) announced that the DLC for the horror action adventure game “Ao-Oni: The Strange Phenomenon at Blueberry Onsen” (PC / Nintendo Switch) titled “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –” will be released on October 30, priced at 1,200 yen (tax included).
In this DLC, the truth behind the “blue tragedy” unfolding at a derelict hot spring inn will be revealed through the perspectives of Aoi and a mysterious man. It explores untold stories from the original game—such as “Where did Aoi come from?” and “What happened to the mysterious man afterward?"—and introduces a new manifestation of the blue ghost lurking deep within.
The newly released trailer features glimpses of this new version of the blue ghost, so be sure to check it out if you’re interested.
Official Website for “Ao-Oni: The Strange Phenomenon at Blueberry Onsen”
Additional DLC “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –” is now scheduled to release on October 30, 2025 (Thursday)! The trailer has been released today!
LiTMUS Co., Ltd. (Headquarters: Minato-ku, Tokyo; President & CEO: Takahiro Kuwamura) and Game Studio Inc. (Headquarters: Minato-ku, Tokyo; Representative Director: Naohiro Fukuda) are pleased to announce that the additional DLC “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –” will be released on October 30, 2025 (Thursday) for Nintendo Switch and Steam. Today’s trailer is also now available! You can see the new appearance of the blue ghost introduced in this title—please take a look.
Trailer for “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –” Released
Aoi awakens at a derelict hot spring inn. The truth previously left unsolved in the main story is now told from the perspectives of both Aoi and the mysterious man.
Game Overview: “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –”
Discover the “truth” behind the “blue tragedy” that unfolded at a derelict hot spring inn!
What were Aoi and the mysterious man really doing behind the scenes of the story? Where did Aoi come from? What happened to the mysterious man afterward? Don’t miss the hidden narrative behind the incident—and the new blue ghost lurking deep within!
※ Customers who purchased “Ao-Oni COLLECTOR’S EDITION” will not be able to play this DLC even if they purchase it separately.
Game Overview: “Ao-Oni: The Strange Phenomenon at Blueberry Onsen”
Latest installment in the series with over 180,000 copies sold worldwide!
Once a popular hot spring inn famed for its “bathing waters that make you beautiful,” it now lies abandoned. Rumors say ghosts haunt the place.
Hiroshi, Mika, Takuro, and Takeshi arrive at this ruined inn to film content for “Mikachannel.” There, they encounter a mysterious man—and Aoi…
What exactly is Blueberry Onsen? And what awaits them deep inside?
Will Hiroshi and the others survive and escape?Product Information
Title: “Ao-Oni: The Strange Phenomenon at Blueberry Onsen”
Genre: Puzzle Horror Action Adventure
Platforms: Nintendo Switch, PC (Steam)
Number of Players: 1
Price: 1,200 yen (tax included)
Languages Supported: Japanese, English, Traditional Chinese, Simplified Chinese, Korean, French, German, Italian, Spanish, Indonesian
Official X Account: https://x.com/aooni_official
Official Website: https://www.gamestudio.co.jp/AooniB/index.html
Nintendo Switch Store Page: https://store-jp.nintendo.com/item/software/D70010000091842
Steam Store Page: https://store.steampowered.com/app/3388870/_/“Ao-Oni COLLECTOR’S EDITION” for Nintendo Switch Now Available!
▼ Visit the official website here
http://www.lucasgames.tokyo/aooni-collectors-edition/Customers who purchased “Ao-Oni COLLECTOR’S EDITION” will receive a free update to “Ao-Oni: The Strange Phenomenon at Blueberry Onsen – Truth Chapter –” in the near future. Please note that specific dates and details are still being finalized.
About “Ao-Oni”
The story follows young protagonist Hiroshi, who impulsively enters a derelict mansion with his friends out of curiosity. Inside lies a terrifying entity known as the “Blue Ghost,” which relentlessly pursues and attacks his companions one by one. As Hiroshi desperately flees from this relentless pursuer while exploring the mansion, he must unravel its mysteries in order to survive and escape…
Originally released as a freeware game in 2004, Ao-Oni gained widespread attention for the intense presence of the sudden appearance of the blue ghost and the gripping puzzle-solving experience that unfolds step by step. It quickly became viral through platforms like NicoNico Douga and YouTube. Subsequent mobile app versions and remakes followed, with series total downloads surpassing 34 million. With the release of its Steam version in July 2024, global popularity soared—its Nintendo Switch edition even claimed first place on the Nintendo eShop’s download software chart around that time—solidifying strong appeal across both PC and console markets.