South Korean indie developer QueseraGames has released the full version of *Nientum - Op.ZERO*, which had been available on Steam Early Access.
A musical-style rhythm adventure game in which two girls take on a performance in a forgotten theater
This title is a musical-style rhythm adventure game.
The setting is a forgotten theater. Two girls who have lost their memories wake up: Riola takes the stage as an actress, while Alef works as the stage director, aiming to make the performance a success.
The game is structured so that the settings of each chapter—inspired by *The Wizard of Oz*, *Cinderella*, and the Legend of King Arthur—are interconnected, gradually revealing the story of the two girls. The conclusion of the final chapter changes depending on the player’s choices.
Controls are simple, requiring only two buttons: players dash through backstage courses while tapping notes in time to create music. The songs in the main story feature Japanese vocals, and the dialogue is fully voiced in Japanese.
Chika Anzai voices Aleph, Yuki Takada voices Riola, and Takehito Koyasu voices Mordred. The soundtrack features contributions from 20 artists from Japan and abroad, including Kagetora., Halv, seatrus, Sakuzyo, and Team Grimoire.
Steam Early Access User Reviews: 98% Positive
The game launched in Early Access on Steam in November 2025. As of this writing, it is rated “Very Positive” on Steam, with 98% of 160 reviews giving it a positive rating.
The developer, QueseraGames, is the studio behind the mobile rhythm game *KALPA*—which has been downloaded over 1.7 million times—and *KALPA: Cosmic Symphony* for Steam. This title has also been highly acclaimed by the industry, having been selected for the “SELECTED INDIE 80” at Tokyo Game Show 2026.
The story concludes in the full release, with a total of 30 songs available for free play
The full release adds new Chapters 6 through 10, bringing the Story Mode to a conclusion. Additional chapters are also available to play after completing the story. Twenty new tracks have been added to Free Play, bringing the total to 30.
You can check the titles of the additional tracks and the participating artists on Steam News.The lineup includes “PUPA” by Atsushi Morimori—a staple in rhythm games—as well as a track created by Mitsukiyo (known for *Blue Archive*) in collaboration with seibin from STUDIOALOH, the studio Mitsukiyo leads. It also features an original track by Tatsh and a track by Ice.
Additionally, the full release includes a “Collection” feature that lets you review collectibles from Story Mode, as well as convenient features like a “Hard” difficulty setting for each Story Mode track and scene skipping. The main story is estimated to take over 12 hours to complete.
*Nientum - Op.ZERO* is currently available for PC (Steam) and Android. The price on Steam is 2,200 yen, and until October 28, it can be purchased at a 20% discount for 1,760 yen. The Android version offers a free introductory chapter.
The iOS version is scheduled for release at a later date.
