In-yu Quest ~Quest for the Queen~ Coming to Steam

TOKYO, JAPAN – November 13, 2026.

Co-FUN Games is pleased to announce that In-yu Quest ~Quest for the Queen~, developed by Mochi&Daifuku, will be coming to Steam!

In-yu Quest ~Quest for the Queen~ is a fantasy JRPG featuring classic turn-based battles, dungeon exploration, and a colorful cast of heroines. Set in a world where demons have emerged as a powerful force threatening humanity, the story follows a brave Hero on a quest to defeat the formidable Demon Queen Niferina.

Armed with legendary weapons and armor, the Hero storms Niferina's castle, only to be swiftly overwhelmed by her immense power. Defeated and branded with the sinister "Succubus Sigil," he must find a way to recover and continue his quest while struggling against the curse that threatens to bend him to the Demon Queen's will.

Along the way, players can recruit heroines with unique backgrounds and abilities, explore sprawling dungeons filled with demons and succubi, and strengthen their party through spells, equipment, and rare items. With a cast of professional voice actors bringing its characters to life, In-yu Quest ~Quest for the Queen~ offers a fantasy adventure where the Hero's fate hangs in the balance.

As of November 13, the game is now available for wishlisting on Steam!
Steam: https://store.steampowered.com/app/3700340?utm_source=enpr
Johren (18+): https://www.johren.games/games/download/inyu-quest-en-zh/
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INTRO
Twenty years have passed since demons first revealed themselves to mankind. Now mighty and flourishing, they have set their sights on world conquest.

In answer, the brave Hero sets forth to storm Demon Queen Niferina's castle and strike her down before her dark reign can begin.

Clad in legendary arms and armor, he presses boldly onward, but is quickly overwhelmed by Niferina's powers. With his defeat, he is branded with her nefarious "Succubus Sigil"...

Can the Hero recover and return to Niferina's castle to face off once more, or is he, too, doomed to a lifetime of humiliation?

GAMEPLAY & FEATURES

* Doujin-style fantasy JRPG with classic turn-based battles

* Recruit a colorful cast of heroines to fight by your side

* Explore sprawling dungeons full of demons and succubi

* Level-based spells and abilities, rare equipment and items

* Star-studded cast of professional voice talent

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CHARACTERS
Lycia
Voice: Yuka Hinata
A priestess who doubles as a field medic when not offering sagely advice. She joins your party as a personal healer on your quest to defeat the Demon Queen.

Mell
Voice: Flan Kulumu
A mage girl from modest Paoville, far from the royal capital. Fascinated by all things arcane, she excels in magic and the unseen.

Jillit
Voice: Aya Kutitani
A wandering swordswoman, honing her blade across the land. Deadly even against the fiercest monsters, yet she never turns away from those in need.
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PRODUCT INFORMATION
Title: In-yu Quest ~Quest for the Queen~
OS: Windows
Players: Single-Player
Developer: Mochi&Daifuku
Publisher: Co-FUN Games, Shiravune
Languages: English, Traditional Chinese, Simplified Chinese
PLATFORMS
Steam, Johren (18+ Adult Version), Other Platforms TBA
PRICING DETAILS
TBA
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ABOUT CO-FUN GAMES
Based in Japan, Co-FUN Games is dedicated to delivering popular Japanese doujin (indie) games to players around the world. The brand name is inspired by the Japanese word for “excitement” (興奮, kōfun), with a playful twist that combines the Japanese pronunciation “FUN” and the English word “fun,” symbolizing the goal of creating games that many players can enjoy.

Steam Publisher Page: https://store.steampowered.com/publisher/cofungames
X: https://x.com/CoFUNGames
Discord: https://discord.gg/RRZwH7q7zU

© Co-FUN Games

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