Ark City guide for Chaos Zero Nightmare. See all Ark City facilities, Policy Points, Psychotherapy, Trauma Code, Diner, Cafe, Communication Pass, Nono's Shop, and Excursion in CZN.
Table of Contents
Ark City Features
Ark City Points of Interest
- Policy Office
- Starshine Diner
- Garden Cafe
- Epione Center
- Nono's Shop
- Research Facility
- Excursion
CZN's Ark City has various facilities, and utilizing them will allow you to progress through the game efficiently.
Policy Office
In the Policy Office, Policies accumulate over time. By completing Policies, you will earn Policy Points, which can be used to exchange for items at Nono's Shop.
Pay Attention to Project Information Too
Projects, such as disaster responses, are also underway in the Policy Office. If you advance the Policies within the limited time and achieve the target value, you will receive rewards according to the Grade.
Starshine Diner
At the Starshine Diner, you can order food by paying with Units. Depending on the food you order, you can receive status upgrades in Chaos.
Garden Cafe
At the Garden Cafe, you can get Aether once a day. You can choose to either instantly recover 80 Aether or obtain recovery items worth 60 Aether.
| Note! | Please note that you can only hold a maximum of 4 recovery items. |
Epione Center
At the Epione Center, you can use two types of content: Psychotherapy and Trauma Code.
Psychotherapy
With Psychotherapy, you can treat Combatants who have fallen into a Deep Trauma in Chaos. If you challenge Chaos with a Combatant in Deep Trauma, you will suffer disadvantages, so be sure to treat them actively.
| Note! | Depending on your choices, there is a chance of entering a Deep Trauma state, during which you cannot gain Affinity.. |
Trauma Code
You can also play Trauma Code at the Epione Center. Additionally, by using the Special Security Code sold at Nono's Shop, you can unlock Trauma Codes outside of their event period.
Trauma Code GuideNono's Shop
At Nono's Shop, you can exchange items with points obtained from Policies. In addition to the Research Notes used for research, you can also obtain items that let you choose the Main Option for Memory Fragments and Training materials.
Memory Fragments - How to Get and UseResearch Facility
In the Research Facility, you can advance your research using the Research Notes that can be purchased at Nono's Shop. By advancing your research, you can gain beneficial effects for the game, such as shortening Policy creation time and increasing the amount of Aether you can retain.
Prioritize the Top Skill Tree
Among the three available skill trees, the top skill tree should be your main priority. It offers key upgrades that support daily progression, including access to the First Skill.
Excursion
In Ark City, you can go on an Excursion with a character that has appeared by selecting their location icon. Going on an Excursion will increase that character's Affinity.
Communication Pass is Required
You use a Communication Pass when going on an Excursion. You can automatically obtain 3 Communication Passes every day.
| Point! | By advancing your research, you can increase the maximum number of Communication Passes by +1. |
Add Favorite for Guaranteed Appearance
The characters that appear for Excursions are random, but if you register them as a favorite in Unigram, they will be guaranteed to appear. You can register up to 3 people, so be sure to register the characters whose Affinity you want to raise.
Unigram GuideHow to Unlock Ark City
Clear Chapter 2 #01-2 to Unlock
Ark City is unlocked by clearing Chapter 2 #01-2 [Ark City]. You need to progress to Chapter 2, so let's raise your Captain Level to 10 and take on the Promotion Mission.
Main Mission GuideChaos Zero Nightmare Related Guides
Galactic Disaster 
The Great Rift
Nebula Distortion
Memory Encroachment
Early Game Guide
Daily Tasks
Recommended Gacha Banner
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
