Release date and launch timeline
Last reviewed · Editor: btiger · Public-source guide.
Chaos Zero Nightmare launched globally on October 22, 2025, on STOVE PC, iOS and Android. Smilegate's launch release and independent launch reporting agree on the date. The October 2026 anniversary celebrates that release; it is not a new global launch.
Global launch: October 22, 2025
Smilegate's contemporaneous announcement describes a global PC/mobile build. Game8's launch countdown independently identifies October 22. Regional storefront availability may differ today; a global launch date is not a guarantee that every country has the same store listing.
Smilegate: October 22, 2025 launch announcementGame8: release date and launch countdown
Dated milestones
Dates refer to the events described in each source. A historical announcement of a planned release is distinguished from reporting that service actually began.
| Date | Milestone | Evidence and scope |
|---|---|---|
| 2025-10-22 | Global PC/mobile launch | Smilegate launch release + Game8 countdown |
| 2026-05-28 | Mainland China service through Tencent | The Elec launch report; corroborated by DigitalToday |
| 2026-07-03 | Anime Expo developer panel in Los Angeles | Smilegate July 6 report + Anime Expo schedule |
| 2026-10-21 | Season 5 / first-anniversary update | October 21 patch notice + Inven Global reporting |
The Elec: China launch reportingDigitalToday: China service dateSmilegate: July 3 panel, reported July 6Anime Expo: 2026 panel scheduleOfficial October 21 update noticeInven Global: anniversary update launch
First anniversary is already underway
As of October 27, 2026, the October 21 anniversary update is in the past. The official site currently serves its Nightmare X Carnival anniversary promotion. Individual activities have separate closing dates; this page does not turn one reward deadline into a single end date for the entire celebration.
Official Nightmare X Carnival promotionAnniversary activity guideSeason and maintenance updates
Steam, consoles and later releases
No dated Steam or console launch announcement was verified in this audit. Main-game launch history, regional publishing and seasonal updates are different timelines. No future platform date is estimated.
Questions
When did Chaos Zero Nightmare come out?
Global launch was October 22, 2025. Mainland China service is separately reported as beginning May 28, 2026.
Is the first anniversary a future release?
No. The anniversary update began October 21, 2026, before this October 27 audit.
Sources
- Smilegate: global launch | checked 2026-10-27
- Game8: global date corroboration | checked 2026-10-27
- The Elec: mainland China launch | checked 2026-10-27
- DigitalToday: China date corroboration | checked 2026-10-27
- Smilegate: panel announcement | checked 2026-10-27
- Anime Expo: independent event schedule | checked 2026-10-27
- Inven Global: October 21 anniversary update | checked 2026-10-27