B-SiDE is credited as the developer of Holo no Treasure Mountain Tenkomori Ver. Nintendo Switch 2 Edition, released for Nintendo Switch 2 on Thursday, September 17, 2026. Earlier in 2026 it released the work companion adventure Memory of Memorie: A Chill Story for PC, Mac, Switch 2, and Switch.
B-SiDE's most recent release is Holo no Treasure Mountain Tenkomori Ver. Nintendo Switch 2 Edition, sold by CCMC Corp. for Nintendo Switch 2 on Thursday, September 17, 2026 at 2,800 yen. An Upgrade Pass costs 400 yen for owners of the Switch version, and the 3D puzzle game supports Japanese, English, Chinese (Simplified and Traditional), and Russian.
The studio's 2026 catalog also includes Memory of Memorie: A Chill Story, a work companion adventure that launched for PC, Mac, Switch 2, and Switch on July 23. Developer Kazunori Nanji said the Switch version lacked a farewell menu because the console does not require exiting the game, and the team added the feature after fan requests. The episodes are separate releases rather than one continuing product, and neither story gives a title count or a broader release schedule.
The other stories in the cluster do not concern B-SiDE. One covers the end of Waka Sanada's manga adaptation of The Delinquent Girl Beside Me Suddenly Dyed Her Hair Black, which ran in Kadokawa's Monthly Shonen Ace and closes with a fourth volume in late November, published in English by One Peace Books. Another covers BeXide's Ver1.2.0 update for NAMCO LEGENDARY Mountains, which added versus modes on August 25, 2026. A third covers Crunchyroll's English dub for the Tamon's B-Side anime, produced by J.C. Staff, with direction by Helena Walstrom.
Synthesized by Yomimono from the cited Yomimono stories below, each itself sourced, then editorially reviewed. Every fact links the story it came from.
Structured graph also available as JSON at /public/entities/b-side.
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CCMC Corp. put Holo no Treasure Mountain Tenkomori Ver. Nintendo Switch 2 Edition on sale Thursday, September 17, 2026, for Nintendo Switch 2, developed by B-SiDE. The 3D puzzle game costs 2,800 yen, with a 400 yen Upgrade Pass for owners of the Switch version and support for Japanese, English, Chinese (Simplified and Traditional), and Russian.
The October issue of Kadokawa's Monthly Shonen Ace magazine published the final chapter of Waka Sanada's manga adaptation of Teika's The Delinquent Girl Beside Me Suddenly Dyed Her Hair Black light novel series on Wednesday. The fourth and final compiled book volume ships in late November. One Peace Books publishes the series in English.
BeXide released Ver1.2.0 for the 3D puzzle game NAMCO LEGENDARY Mountains on August 25, 2026, adding two versus modes: Score Attack and Voxel Race. In both modes, dropping voxels does not cause a game over, and players can practice alone if no opponent is available. Score Attack awards the win to the player with the most points within a time limit, while Voxel Race tasks players with creating the largest voxel faster than their opponent, with the ability to restart while keeping the largest voxel. The update also enables online play with others via Steam's Remote Play Together and Nintendo Switch 2's Share Play, even if the other player does not own the game. To mark the update, a 20% off sale runs until September 6, dropping the price from 2,480 yen to 1,984 yen on Steam, Switch 2, and Switch. Switch owners can upgrade to the Switch 2 version for 330 yen. Additional campaigns include a Collection Room Design Contest on X with daily gacha points, and a follow-and-repost campaign offering Steam download codes to 10 winners. The versus modes will be playable at gamescom 2026 and Tokyo Game Show 2026.
Biside's work companion adventure 'Memory of Memorie: A Chill Story' launched for PC, Mac, Switch 2, and Switch on July 23. Developer Kazunori Nanji said the Switch version lacked a farewell menu because the console does not require exiting the game, and after fan requests, the team moved quickly to add the feature.
Crunchyroll began streaming the English dub for the Tamon's B-Side anime on Thursday. The dub cast includes Abigail Blythe as Utage, Conner Allison as Tamon, and Brandon Acosta as Ouri, among others. Helena Walstrom directed the dub. The anime premiered in January and was produced by J.C. Staff.