The Guestbook of the Otherworld, a horror simulation game set at a hot spring inn in the Otherworld, from FWGames (operated by Frontier Works), is taking part in Steam Next Fest, which runs from October 20, 2026 (JST). The game is planned for release in November 2026.
The Guestbook of the Otherworld on Steam
Try the Free Demo During Steam Next Fest
Steam Next Fest is an online event where players can try free demos of participating titles and catch developer live streams, giving an early look at games that are coming to Steam.
A free demo of The Guestbook of the Otherworld is currently available on Steam, and it can be played throughout Steam Next Fest. It offers an early taste of the game's world and gameplay ahead of launch.
Simplified Chinese Support and Chinese Voice Acting
In addition to Japanese, the game supports Simplified Chinese. In the Chinese voice track, Hina is voiced by Emiri Iwai (岩井映美里), who also voices the role in the Japanese version, so players can hear Hina's voice in both languages.
Tsukumogami Guests and Night-Time Horrors at a Hot Spring Inn
The story is set in the Otherworld, a world that is neither this shore nor the far shore. Forgotten objects drift into this realm and wander as tsukumogami, and a single hot spring inn stands there.
The player wakes up as an employee of the inn with no memory of the past. They cannot recall how to do the job, yet their body strangely moves on its own.
The inn's guests are those who finished their roles in the living world, were forgotten, and became tsukumogami. Each carries "Kegare," a soul-corroding evil energy. Soaking in the hot spring, eating good food, and sleeping peacefully gradually wash the Kegare away.
However, the Kegare that leaves a guest does not vanish. It builds up inside the inn and attacks the player in the form of supernatural phenomena night after night.
Game Overview and Features
The game is built around a tense cycle that alternates between day and night. Through interactions with the tsukumogami, the story of the Otherworld and the Kegare unfolds, and the story's development and ending change depending on the player's choices.
Daytime: Inn Work to Soothe the Tsukumogami
During the day, the player's role is to look after the tsukumogami who visit the inn. As the player works and talks with the guests, the Kegare and the pasts they carry gradually come to light.
Night-Time: Surviving the Kegare-Filled Inn
At night, the Kegare shed during the day overflows throughout the inn, and the tsukumogami show a different side from their daytime selves. Helping someone can lead to salvation, but kindness can also invite danger in the night.
Characters
Protagonist
An employee who has lost their memory. After waking up, they end up working at the inn simply as events unfold. They have forgotten how to do the work, but it seems to be ingrained in their body.
Hina (voiced by Emiri Iwai)
A girl with white skin and white hair and a delicate, fragile air. Despite her small frame, she works hard at the inn every day. She speaks in a soft, polite manner with a voice that is calmer than her appearance would suggest.
She has a calm personality and is kind to everyone. She puts the guests first and always tries to greet them with a smile. She is older than she looks, though the gap is not that large.
Tsukumogami
Beings who were forgotten in the living world and became tsukumogami. Each carries the soul-corroding evil energy "Kegare" and visits the inn seeking healing.
Game Information
- Title: The Guestbook of the Otherworld
- Genre: Hot spring horror simulation
- Platform: Steam
- Steam release date: November 2026 (planned)
- Price: ¥1,500 (tax included)
- Number of players: 1
- Supported languages: Japanese, Simplified Chinese
- Supported voice languages: Japanese, Chinese
- Publisher: Frontier Works
- Steam: https://store.steampowered.com/app/4249520
- Cast: Hina: Emiri Iwai
- Official X: https://x.com/FWgames2025
- Teaser site: https://www.fwinc.co.jp/guestbook
- Hashtag: #異界ノ宿帳
Note: Details are subject to change. Screens shown are from the game in development.
