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.
Table of Contents
What is 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.
Choices Lead to Different Branches
In Trauma Code, important choices may appear within a Mission. The route will branch depending on your choices and the ending will change.
Cannot Switch Routes After Selecting
Once you select a route, you will not be able to choose a different option even if you view the same Mission again. By progressing to the ending of the current route, you will be able to select another one.
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.
Still Unlockable After Event
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
Galactic Disaster 
The Great Rift
Nebula Distortion
Memory Encroachment
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
Twin Star's Shadow Guide
How to Download & Sync Data
Deep Trauma Guide
Latest Updates 
Intermediate Captain Promotion Guide
Unigram 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 
Prism Modules
Daily Reset Time
Zero System
Counseling Guide
Omega Codes
Redeem Codes
Zero System Guide
Basin of Hyperspace Guide
Affinity Guide
