Trauma Code guide for Chaos Zero Nightmare (CZN). See how to unlock Trauma Code, character story events, battle missions, limited-time rewards, walkthrough tips, and more in CZN.
This guide is based on a pre-release test version of Chaos Night Zero. Some images, data, and content may differ from the final game.
Ongoing Trauma Code Event
A Flickering Gleam on a Rusted Anchor (Haru)
| Event Period | Start: Oct 22, 2025 03:00 (UTC-0) End: Nov 10, 2025 at 17:00 (UTC-0) |
|---|---|
| Limited Time Rewards | - Coordinates of Record - Memories made with Haru - Crystals - Premium Battle Memory - Premium Support Data - Great Growth Stone of Justice - Unit |
What is a Trauma Code?
Stories of Specific Combatants
The Trauma Code is a story-based, narrative-driven mode. Like the main story, progression involves alternating between story segments and battles.
Battle Missions Are Also Unlocked
Unlike regular missions, battle missions are unlocked simultaneously during the Trauma Code event. By completing battle mission objectives, you can earn rewards such as Crystals.
Obtain Rewards for a Limited Time
The Trauma Code has a set duration. By clearing the story and Event battles during this period, you can obtain limited-time rewards.
Can Be Unlocked Even After the Event Ends
After the event period ends, you will no longer be able to obtain the limited-time rewards, but you can still play through the Trauma Code. You can unlock each Trauma Code by consuming a Special Security Code, which can be purchased from Nono's Shop.
Trauma Code Unlock Conditions
Unlocked by Clearing Chapter 2 #05-1
The Trauma Code is unlocked by clearing Chapter 2 #05-1 [Epione Center]. The Mission right before this includes a battle in Chaos, so make sure your characters are well-trained.
Main Mission GuideChaos Zero Nightmare Related Guides
Early Game Guide
Daily Tasks
Recommended Gacha Banner
Ark City Guide
Card Epiphany Activation
How to Use Ego Skill
Stress Management
Weakness Attribute Guide
Safe Zone Guide
How to Restore Aether
How to Raise Captain Grade
ID Card Settings
Battle Pass (Arkhianon Supply) Guide & Should You Buy?
Simulation Guide
Character Enhancement Guide
How to Set and Upgrade Partner
How to Upgrade Potential
How to Use Save Data
How to Upgrade Manifest Ego
Memory Fragments 
