Early Access
Is Cosmic Ultramarine still being updated?
No. Last updated 6 months ago, averaging 0.1 updates a month, and it has gone quiet.
Last checked Oct 21, 2026
Gone quietAll gone quiet games
Update history
Cosmic Ultramarine: 1 update in the last 12 months. The chart covers 24 months from November 2024 to October 2026, including months with zero patch notes. Counts are dated patch and update posts, not branch builds. November 2024: 3, December 2024: 2, January 2025: 0, February 2025: 0, March 2025: 0, April 2025: 0, May 2025: 0, June 2025: 0, July 2025: 0, August 2025: 0, September 2025: 1, October 2025: 0, November 2025: 0, December 2025: 0, January 2026: 0, February 2026: 1, March 2026: 0, April 2026: 0, May 2026: 0, June 2026: 0, July 2026: 0, August 2026: 0, September 2026: 0, October 2026: 0.
| Month | Updates |
|---|---|
| November 2024 | 3 |
| December 2024 | 2 |
| January 2025 | 0 |
| February 2025 | 0 |
| March 2025 | 0 |
| April 2025 | 0 |
| May 2025 | 0 |
| June 2025 | 0 |
| July 2025 | 0 |
| August 2025 | 0 |
| September 2025 | 1 |
| October 2025 | 0 |
| November 2025 | 0 |
| December 2025 | 0 |
| January 2026 | 0 |
| February 2026 | 1 |
| March 2026 | 0 |
| April 2026 | 0 |
| May 2026 | 0 |
| June 2026 | 0 |
| July 2026 | 0 |
| August 2026 | 0 |
| September 2026 | 0 |
| October 2026 | 0 |
Recent updates
Mar 27, 2026 · Build
Public branch build 22530299
Latest build time Steam reports for the public branch.
Feb 16, 2026 · Patch note
Sep 13, 2025 · Patch note
亲爱的玩家朋友们： 好久不见！ 本次带来的更新中，我们优化了主线流程的数个事件的立绘与文本对话（例如柏拉图、鳗鱼等）—— 共新增立绘16张与修改立绘11张，修改了4个事件的文本错误，同时新增了几个Rain的Topic；后日谈暂无内容更新；游戏的英文启动选项暂时关闭。 今年年初至今，21N工作室的全体成员都进入了打工状态，大家仅能以兼职状态线上协作开发游戏。以及因为各种各样的原因，我们的更新停滞了很长的时间。 目前，我们重新梳理了产品线及宇宙群青的更新计划。在未来的一到两年内，我们会以兼职开发的状态，缓慢但稳定地对宇宙群青的主线流程进行优化（新增关卡、优化立绘和文本、优化动画与音效效果等）；同时，后日谈的更新的优先级将会调低，我们会更倾向于在积累大量内容后以较低的频率发布。 感谢大家的信任与喜爱，我们会继续加油…
Dec 25, 2024 · Patch note
感谢大家的喜爱与支持！我们游戏的0.9.0今日正式发布啦！ 在这个版本中，我们加入了全新的后日谈玩法框架，几支新的单曲，Rain的新Memory、Topic，以及一些可爱的古怪角色。 后日谈的进入线索为“草地-夕阳”--“水晶之城”，希望大家玩得愉快！ 叠甲： 后日谈框架目前尚不稳定，且内容亟待充实。 接下来的开发进程中，我们将持续对它进行内容填充与体验优化，为大家带来更多的惊喜！ 祝大家： 圣诞快乐，身心健康！ 21st Nostalgia 敬上
Dec 2, 2024 · Patch note
·为对话界面增加了“回顾”按钮 ·音乐见面的音频可视化 ·修正了Topic的部分文本错误
Questions
When was the last update?
Cosmic Ultramarine last shipped a public branch build 6 months ago (Mar 27, 2026).
How often does it update?
Cosmic Ultramarine averaged 0.1 updates a month over the last year. Cosmic Ultramarine is rarely updated (12/100). 2 of the last 12 months had at least one update day. Not enough of a cadence to call it regular.
Is it abandoned?
Yes. Cosmic Ultramarine is marked gone quiet, which means the last build or patch note is older than 180 days, or there is no signal at all.
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