About the Game
"—To fade away... was it hope for you and me, or despair?"
『Nientum – Op.Zero』 is a 2D action-adventure music game that combines platformer, action, and adventure elements.
Tune the stage through musical interactions and experience a unique journey to breathe life back into a theater that has settled in a gray stillness.
A Strange Play Created Without Memories
A theater once filled with songs and stories is now filled only with silence.
In this desolate place, Aleph and Liora, who have lost their memories, become the Director and the Actress to raise the curtain on a new play.
On a stage that is beautiful yet foreboding, warm yet sorrowful, they discover lost clues one by one.
What truth will they face in the final scene of this play?
Prepare the Stage Through Action — The Power of 'Tuning'
The gems scattered throughout the stages are fragments of broken notes.
Use Aleph’s ability to tune them, play their restored notes, and restore stage devices to complete the preparations for the performance.
As platforming, puzzles, and action naturally intertwine, the theater begins to regain its vitality.
The Performance Unfolds on the Stage You Tuned
The Wizard of Oz, Cinderella, The Legend of King Arthur...
Familiar tales are reinterpreted, and sometimes twisted, into musicals that unfold before your eyes.
With each of Liora’s successful performances, a fresh glow of life returns to the theater. And their journey continues to the next act.
Truth Brought to Light — Endings Shaped by Your Choices
Nightmares and hope, wishes and despair, new encounters and farewells.
The fragments of memory lost by Aleph and Liora are revealed one by one, following your choices.
Depending on the direction of your choices, the end of the story takes a completely different turn, drastically altering their fates.
Please, join them in their journey and help raise the curtain on this strange play.
Music and Voices that Bring the Stage to Life
The stage is filled with music composed by renowned artists such as
Kagetora., Halv, and seatrus, delivering a deeply immersive experience.
The main characters—including Aleph and Liora—are brought to life by talented voice actors such as
Chika Anzai, Yuuki Takada, and Takehito Koyasu, vividly expressing the beauty and strangeness of the theater.
Additional Content
Director's Room: A space where you can record and view the various collectibles gathered while completing the play.
Free Play Mode: A dedicated mode where you can enjoy tracks built with the rhythm-action expertise of Quesera Games, separate from the main story.
Screenshots
9 images
Version Information
Steam Patch Notes
Official update history
Hello, this is QueseraGames.
Here are the patch notes for Nientum - Op.ZERO version 1.0.16.
Patch 1.0.16
Fixed an issue where a cutscene error occurred when replaying a specific cutscene after skipping it
If you run into any issues while playing, please let us know in the bug report channel on our official Discord. We'll look into it as soon as possible.
Join our official Discord
[dynamiclink href="https://store.steampowered.com/app/2725250/____Nientum__OpZERO/?beta=0"]
Hello, this is QueseraGames.
Here are the patch notes for Nientum - Op.ZERO version 1.0.15.
Patch 1.0.15
You can now change the difficulty in some stages where you cannot return to the lobby
Fixed errors in some Hard patterns
Fixed an issue where the cutscene did not progress in certain situations
Fixed an issue where effect objects did not display correctly in some stages
Fixed an issue where the combo count increased abnormally when retrying "From Checkpoint"
Fixed an issue where Challenge difficulty could still be checked while Automata was enabled
Fixed an issue where motions did not play correctly in some Free Play songs
Various other bug fixes
If you run into any issues while playing, please let us know in the bug report channel on our official Discord. We'll look into it as soon as possible.
Join our official Discord
[dynamiclink href="https://store.steampowered.com/app/2725250/____Nientum__OpZERO/?beta=0"]
Hello, this is QueseraGames.
Here are the patch notes for Nientum - Op.ZERO version 1.0.14.
Patch 1.0.14
Added the option to choose "From the Beginning" or "From Checkpoint" when retrying a stage
The pause screen now shows a description of the current story difficulty (Tuning / Balance / Challenge)
Fixed an issue where restarting a stage at certain moments left the character or UI in an abnormal state
Fixed an issue where effects did not display correctly in some stages
Fixed an issue where screen transition effects did not work correctly in certain situations
Fixed an issue where Challenge difficulty was not applied in Stage 5-5
Fixed some English subtitle errors
Fixed errors in some of the guide pages shown when a new system is unlocked
Fixed an issue where some achievements were unlocked during the tutorial
Various other bug fixes
If you run into any issues while playing, please let us know in the bug report channel on our official Discord. We'll look into it as soon as possible.
Join our official Discord
[dynamiclink href="https://store.steampowered.com/app/2725250/____Nientum__OpZERO/?beta=0"]
Hello, this is QueseraGames.
Here are the patch notes for Nientum - Op.ZERO version 1.0.13.
Patch 1.0.13
Fixed an issue where song info was not displayed correctly in Free Play
Fixed an issue where the note hit effect did not play correctly in certain situations
Fixed an issue where certain visual effects appeared broken
Fixed an issue where the story difficulty was locked and could not be changed
Fixed an issue where the interaction dialogue did not appear when the lobby vending machine was empty
Mobile
Improved an issue on Android devices where in-game touches were intermittently not registered
Fixed an issue where the frame rate would drop
Fixed an issue where HD difficulty could not be selected in the story options
Various other bug fixes
If you run into any issues while playing, please let us know in the bug report channel on our official Discord. We'll look into it as soon as possible.
Join our official Discord
[dynamiclink href="https://store.steampowered.com/app/2725250/____Nientum__OpZERO/?beta=0"]
Hello, this is QueseraGames.
Here are the patch notes for Nientum - Op.ZERO version 1.0.12.
Patch 1.0.12
Fixed an issue where some achievements could not be unlocked
Fixed an issue where a certain ending could not be reached
Lowered the HD difficulty of a certain stage
Fixed an issue where some achievements were unlocked during the tutorial
Removed the feature that turned already-hit notes gray when using "Retry Previous Stage"
Various other bug fixes
If you run into any issues while playing, please let us know in the bug report channel on our official Discord. We'll look into it as soon as possible.
Join our official Discord
[dynamiclink href="https://store.steampowered.com/app/2725250/____Nientum__OpZERO/?beta=0"]
Hello, this is the Nientum development team.
To provide a more stable and comfortable gameplay experience, the following update will be applied.
Scheduled Date: December 23, 2025 (Tue) 6:00 PM (UTC+9)
💎 Major Updates
1. Automatic Audio Noise Correction
Added a feature that detects noise issues occurring on certain audio devices and automatically adjusts the output for stable audio playback.
2. Steam Cloud Save Support
Game data is now automatically saved via Steam Cloud.
Your play data will be safely preserved even when switching devices.
3. Improved Mouse Support for UI
Official mouse support has been applied across the entire UI, enhancing overall usability and control.
4. Input System Overhaul (New Input System Applied)
• The input system has been migrated to the New Input System, and all input settings have been reset.
• The key configuration UI has been improved, and gamepad input is now officially supported.
※ Please review and reconfigure your key settings after the update.
5. Fixed Screen Freeze When Changing DSP Buffer Size
Resolved an issue where the screen would temporarily freeze
when changing the DSP Buffer Size in the audio settings.
Thank you for playing Nientum.
We will continue to improve the game through ongoing updates and refinements.
Hello, this is QueseraGames.
Here are the updates included in the November 25, 2025 hotfix:
- Added a character voice volume control option
- Adjusted the game to automatically pause when leaving the game screen
- Fixed an issue where the character would not walk in certain situations
- Fixed translation errors in several languages
After restarting Steam and updating the game, the above fixes will be applied.
If you encounter any inconvenience or find additional issues while playing,
feel free to contact us anytime. We will continue working to improve the game.
✉️[email protected]
Thank you for your continued support.
Hello,
As of January 17th 2025 (UTC+9), an update has been applied to the Nientum - Opus ZERO demo version.
- Some Bugs fixes and optimization
Thank you.
Current Release
Build 26371129
Uploaded Nov 11, 2026
System Requirements
How to Install
Nientum.exe to play
Troubleshooting tips
• Run Redist/_CommonRedist installers if game won't start
• Add folder to Windows Defender exclusions
• Run as administrator
Download
Direct link available
Needed when extracting (WinRAR / 7-Zip) — not a site login.
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Download Nientum - Op.ZERO for PC with a direct link or via torrent. Get the full version of Nientum - Op.ZERO for free. Nientum - Op.ZERO is a Action released by QueseraGames.