A 2D action-adventure rhythm game where the story unfolds by tuning the stage with music. A play by Aleph and Liora, who have lost their memories. A beautiful yet eerie stage, and the secret of the forgotten theater await. Your choices will determine the play's ending — and their fates.

Public builds
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Counted once we have watched for 90 days (since 21 Oct 2026)
Distinct builds deployed to a game's public (default) Steam branch, as Steam's client network describes them.
Checked within minutes of each Steam change. Observed since 21 Oct 2026.
Source: Steam client network (PICS), App info, public branch. Full methodology
Latest public build
Build 26614335
Update posts
8 postsPosts announcing an update, tagged or not
Posts in a game's official Steam news feed that announce an update: tagged as patch notes by the developer, or plainly about a patch or a released update.
Source: Steam Web API, ISteamNews/GetNewsForApp. Full methodology
Typical gap between builds
3 daysMiddle gap across the last 8 builds we saw
| Build | Went live | Patch notes |
|---|---|---|
| 26614335 | None posted | |
| 26371129 | None posted | |
| 26315052 | None posted | |
| 26298970 | None posted | |
| 26287827 | [2026.10.29] Nientum - Op.ZERO Patch Notes 1.0.16 | |
| 26213136 | None posted | |
| 26107812 | [2026.10.22] Nientum - Op.ZERO Patch Notes 1.0.14 | |
| 26008965 | [2026.10.18] Nientum - Op.ZERO Patch Notes 1.0.13 |
| Posted | Update |
|---|---|
| 17 Oct 2026 | [2026.10.18] Nientum - Op.ZERO Patch Notes 1.0.13 Patch notes |
| 16 Oct 2026 | [2026.10.17] Nientum - Op.ZERO Patch Notes 1.0.12 Patch notes |
| 14 Oct 2026 | [Oct 14] Nientum - Op.ZERO Full Release Update Update |
| 23 Dec 2025 | 📢 Nientum - Op.ZERO Update Notice Patch notes |
| 25 Nov 2025 | [Hotfix] 2025.11.25 Patch notes |
From Steam’s client network, last checked . Builds before 21 Oct 2026, when we started watching, aren't listed. Patch notes are the developer’s update post from an hour before to a day after the build. Not every build gets one. How we count
| 17 Jan 2025 |
| Bug fixes Update Announcement (Jan 17) Patch notes |
| 15 Jan 2025 | Updates Including Newly Added and Improved Stages Announcement (Jan 15) Update |
Steam keeps no record of past build numbers, so before 21 Oct 2026 a game’s update history comes from its own Steam news: posts tagged as patch notes, and untagged posts that plainly announce a patch or a released update. Older posts are still being read in, most played games first. How we count