Idea Factory is an active Nintendo Switch game publisher and developer. Its most recent announced title, Sullyland Nursery Rhyme, launches October 1, and the otome game MIX DUNK -KING OF BASKETBALL- launches November 26. CRAZY CHA!N -Elpis no Kusari- released on July 9.
Idea Factory's current slate is built around the Nintendo Switch, with three otome and dark fantasy titles in a short window. The most recent release, CRAZY CHA!N -Elpis no Kusari-, launched on July 9. It is set in a 1000-year war between two European countries, and its protagonist is the 17th Jeanne d'Arc who wants to stop being a saint. The regular and digital versions cost 8580 yen, while the special edition costs 10780 yen.
Two announced titles are pending. Sullyland Nursery Rhyme, a dark fantasy game, launches October 1. It alternates between daytime festival preparation and a nighttime life-threatening game called Night Lessons, run by a talking stuffed animal named Shiro. A CG movie released on August 17 showed gameplay footage and revealed the ending theme Yūransen (Sightseeing Boat). The other pending title, MIX DUNK -KING OF BASKETBALL-, launches November 26 and is supervised by professional basketball team Kawasaki Brave Thunders and idol group AKB48.
Together, these stories show Idea Factory pushing original dark fantasy IP alongside real-world crossover otome titles. The company is not resting on one genre: it is pairing a fresh dark fantasy premise with a sports and idol collaboration. All titles are for Nintendo Switch.
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Aug 17
Idea Factory released a CG movie for the Nintendo Switch game Sullyland Nursery Rhyme on August 17, 2026. The movie shows actual gameplay footage, covering calm daily scenes and tense moments with the protagonist and target characters. It also reveals the ending theme Yūransen (Sightseeing Boat) for the first time. The game is a dark fantasy with suspense elements set in the religious city of Malenis, where protagonists join a life-threatening game run by a stuffed-animal-like creature named Shiro. It launches October 1.
Jul 17
Idea Factory announced that the Nintendo Switch otome game MIX DUNK -KING OF BASKETBALL- will launch on November 26. The romance adventure is supervised by professional basketball team Kawasaki Brave Thunders and idol group AKB48. 4Gamer published exclusive event CGs and a scenario preview alongside the release date.
Jul 9
Idea Factory released the otome game CRAZY CHA!N -Elpis no Kusari- for Nintendo Switch on July 9. The game is set in a world where a war between two European countries has lasted 1000 years. The protagonist, the 17th Jeanne d'Arc, wants to stop being a saint. She can either save the country or fall in love, which would cause her to lose her saint powers. Regular and digital versions cost 8580 yen; the special edition is 10780 yen. A campaign offers signed illustration boards as prizes.
Jun 15
Idea Factory released a promotional video for Sullyland Nursery Rhyme, a dark fantasy Nintendo Switch game where players take on a life-threatening game called Night Lessons from a talking stuffed animal named Shiro to save townspeople. The game launches October 1 and alternates between daytime festival preparation and nighttime survival.