Under Mythos is in development at Kadath for a planned 2028 release on PC via Steam and Nintendo Switch. Kadath is a production company founded in January 2026 by producer Yoichi Miyaji, and Under Mythos is its first project.
Kadath announced Under Mythos on September 10 as a dark fantasy JRPG planned for 2028 on PC via Steam and Nintendo Switch. The company was founded in January 2026 by producer Yoichi Miyaji, and the game is its first project. The protagonist is a cat searching for its Mother who wanders into another world, arrives at a mysterious hot spring inn where otherworld residents soak, and works there entertaining guests while hoping to reunite with Mother.
The game system combines hot spring inn management with extraction. Players explore dungeons for ingredients and resources, fight action battles against grotesque transformed beings, and return safely to put the ingredients and rewards back into running the inn. Developing the inn produces new encounters and experiences that lead back to exploration, and the familiar world gradually mutates into an unpredictable madness as the story progresses.
By October, Kadath described a small, creator-first production house that pulls staff from several studios as needed, with Under Mythos as the test case for whether that model can deliver an original JRPG. Yoichi Miyaji leads the project and Atsuko Nishida designs characters. Matrix, Liz, and Taiwan's iSWEETY are among the developers helping. The Cthulhu mythos world sits beneath the calm of the inn setting.
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KADATH, a production company founded in January 2026, is working on Under Mythos, a dark fantasy JRPG planned for 2028 on PC and Switch. Yoichi Miyaji leads it; Atsuko Nishida designs characters. The player is a cat searching for Mother who ends up working at a Japanese hot spring inn, with a Cthulhu mythos world beneath the calm. Matrix, Liz, and Taiwan's iSWEETY are among the developers helping.
Kadath Co., Ltd. announced on September 10 the dark fantasy JRPG Under Mythos, planned for release in 2028 on PC via Steam and Nintendo Switch. The studio was founded in January 2026 by producer Yoichi Miyaji, whose credits include the LUNAR and GRANDIA series, and Under Mythos is its first project. The protagonist is a single cat that wanders into another world while searching for its Mother, arrives at a mysterious hot spring inn where otherworld residents soak, and works there entertaining guests while wishing to reunite with Mother. The game system combines hot spring inn management simulation with extraction: players explore dungeons for ingredients and resources, fight action battles against grotesque transformed beings, and return safely to put the ingredients and rewards back into running the inn. Developing the inn produces new encounters and experiences that lead back to exploration. The familiar world gradually mutates into an unpredictable madness as the story progresses.