Patch History
This page tracks Chaos Zero Nightmare's major patch milestones over time, newest first. Unlike day-to-day news, this is a long-term record — useful for looking back at exactly when a feature launched, and it only grows more valuable over time.
Why Patch History instead of Latest News?
Day-to-day news needs someone updating it constantly, while a patch history is a stable timeline record — its lookup value grows over time instead of going stale. This page is updated whenever a major patch drops, not on a daily schedule.
Patch Milestones
| Date | What changed |
|---|---|
| 29/07/2026 | Season 4 (Shattered Light and Claw): adds combatant Hilde with her Partner Eunie, the new Kaleidoscope Hatchery Chaos region, Build Presets (up to 3 builds per combatant with shareable codes), 2 new Memory Fragment sets (Sanguine Thorn, Battlefield Evolution), and lowers the Sortie entry Aether cost from 30 to 10 plus adds a Rest Area before the first boss. |
| 08/07/2026 | Added combatant Fei (Void-attribute Ranger, built around the Inferno Rhapsody card and the Descent mechanic) with Partner Ruixiang; added Backup Protocol to the Zero System (restore previous-season passive nodes using Chaos Orbs); Sortie gained a Hardcore leaderboard (top 100) and Engagement Data missions; Season 3 ended. |
| 17/06/2026 | Season 3's final phase (Chapter 3 of «A Song Rippling Through the Stars», 3 weeks); added combatant Tenebria (Psionic Passion, cycling Rhythm Cards) with Partner Aria; the game's first-ever banner rerun: Haru and Asteria. |
| 27/05/2026 | Season 3 Phase 2 («A Girl's Nightmare», 3 weeks); added combatant Adelheid (Void Vanguard, the Blessings mechanic) with Partner Clara; Season 3's Great Rift opened with the Punisher of Resentment boss; the 2nd Supply Store added an Omega Code (unlocks any character's Ego Manifestation for free). |
| 29/04/2026 | Season 3 launched («A Song Rippling Through the Stars», unlocked at Captain Level 35); added the roguelike Sortie mode (5 difficulties, Level 40-80, with a Hardcore option); Spiral Tower of Screams left beta; added combatant Heidemarie (Passion Ranger, the Effulgent Blades mechanic); rebalanced several supports (Nia, Rei, Orlea, Magna, Maribell, Yuki, Haru, Rin, Kayron, Chizuru) for Sortie viability. |
| 08/04/2026 | Season 2 («Seed of Karmic Fire») ended, entering the pre-Season-3 period; added combatant Diana (Hunter Passion, the Resonance + Quietus mechanic) with Partner Sophia; added the time-limited Full-Scale Offensive content (refight past Great Rift bosses); buffed all 5-star Partners (base stats + passives, now counted into Memory Fragment scoring). |
| 25/02/2026 | Continued the Season 2 story; the Great Rift returned with a Colossus-type enemy (both hands must be broken before its head is exposed); deadline for the free growth-reset tied to the Tressa/Cassius rework from the 04/02 patch. |
| 04/02/2026 | Launched Season 2 «Seed of Karmic Fire», adding the new Burning Life Chaos region; added combatant Nine (Order Vanguard) with Partner Alcea; overhauled the Zero System (reorganized into 3 upgrade branches) and added Tier 15 (a chance at mythic modifiers); the Great Rift and Nebula Distortion returned for the season; reworked combatants Tressa and Cassius. |
| 21/01/2026 | Expanded the Spiral Tower from 50 to 75 floors; Codex progress is no longer lost on exit/defeat once entered via Waypoint; added a confirmation prompt when merging Codices at Level 81+; clearing a higher Codex Record difficulty now auto-clears lower ones. |
| 14/01/2026 | Added the Mental Image Leakage status to Counseling (choosing wrong in both rounds still clears Mental Breakdown, but grants 0 affinity); launched the Spiral Tower of Screams mode in beta (50 floors). |
| 24/12/2025 | Added the game's first-ever limited combatant, Sereniel, with her Partner Peko Peko; Galactic Disaster story unlocks Chapter 3 «Catalyst of Evolution»; Battle Missions adds Chapter 8 «Abyss» (3 stages, 3 difficulties: Normal/Hard/Abyss); new Chaos Missions now use the Story Team (doesn't share the Save Data mechanic with regular Chaos); rebalanced several low-performing Fates; added holiday greetings in the Lobby for Christmas/New Year. |
| 03/12/2025 | Added combatant Chizuru; the Forbidden Catalyst system moves to a new chapter, «Seals and Forbidden»; completing Chaos runs now grants Crystals of Discord, spendable at the Blackhorn Trade; added a 21-day check-in event; improved the combatant-gifting experience (preferred gifts, easier affinity tracking). |
| 25/11/2025 | A small maintenance patch focused on the mail system: rewards can now be claimed from mail even after exceeding the mailbox limit. |
| 19/11/2025 | Lowered the Captain Level requirement to unlock Laboratory 0 difficulty 5+ from Level 50 to Level 40; fixed a bug where Hugo's Hunting Instincts card's first epiphany didn't appear, and a bug where the Memory Encroachment effect wrongly affected enemies outside the Dimensional Tunnel. |
| 15/11/2025 | Laboratory 0 now shares the Zero System's upgrade/rare-species/penalty-rule/Chaos Orb reward mechanics; unlocked difficulties 9-11; improved some Laboratory 0 equipment, Neutral Cards, and attribute-based 4-piece Memory Fragment sets. |
| 14/11/2025 | Fixed bugs disabling certain cards' effects, and a bug where monster cards weren't awarded after defeating the new Laboratory 0 elite enemies. |
| 12/11/2025 | Launched Forbidden Catalyst Season 1: new Chaos areas Laboratory 0 and Nebula Distortion, the Great Rift, and new story content; added combatant Yuki with Partner Westmacott; added a Policy Office event and a Yuki trial event. |
| 04/11/2025 | Fixed a save-data issue in the Zero System game mode — the developers will announce later when data adjustments take place, which may add or remove Divine Epiphany effects for affected players. |
| 01/11/2025 | Fixed a bug awarding duplicate Trauma Codes star-completion rewards (duplicates will be reclaimed); improved the description text for Rescue Merit rewards and first-purchase Crystal offers; fixed Foretold Ruin not appearing on a level-5 Codex merge; fixed Stress being applied incorrectly during Invasion battles; fixed being able to preview a Breakdown Card's outcome in advance. |
| 30/10/2025 | Adjusted several in-game description texts and fixed a Breakdown Card bug, plus various other minor content/character/combat fixes. |
| 28/10/2025 | Improved the accuracy of Card descriptions and UI navigation; various minor Card/UI adjustments and bug fixes. |
| 24/10/2025 | Brief server maintenance; fixed a few minor in-game issues and corrected the Korean localization for accuracy. |
| 22/10/2025 | Launch Chaos Zero Nightmare's global launch. |
This table lists 23 patch milestones since launch.
Patch dates are compiled from the founder's notes, cross-checked against multiple community sources (not named here). Each milestone's description is cross-checked against the character/system list already on this site; only the mechanic is recorded, never guessed numbers.
See also
Quick FAQ
Why does this page only have patch history, not the latest news?
Because patch history only grows more useful over time, while daily news needs someone actively maintaining it, which isn't always available. This page is updated whenever a major patch lands.
I'm returning to the game after months away — what order should I read this table in?
The table is sorted newest first, but to follow the story/season flow in order, start from the "Launch" row at the bottom and read upward — or check the Seasons and Story Missions pages in the "See also" section below for a more continuous view than a date-by-date list.