Zenless Zone Zero (ZZZ)

The Mystery of Arpeggio Fault Event Guide

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Zenless Zone Zero (ZZZ) The Mystery of Arpeggio Fault

Zenless Zone Zero's The Mystery of Arpeggio Fault Event is an HDD Exploration Event inside the Hollow Zero. See how to play the Arpeggio Event in ZZZ, how to unlock it, stages and all the rewards in this Zenless Zone Zero (ZZZ) guide!

The Mystery of Arpeggio Fault Event
1 - Fault Surface Fault Surface 2 - Old Observatory Old Observatory 3 - Outpost Beacon Outpost Beacon
4 - Laboratory Ruins Laboratory Ruins 5 - Turbulent Corridor Turbulent Corridor 6 - Password Bangboo Password
Slumbering Land Quest Where the Mystery Went Quest

The Mystery of Arpeggio Fault Event Information

The Mystery of Arpeggio Fault Event Details

The Mystery of Arpeggio Fault
Event Start November 6, 2024
Event End December 17, 2024
Unlock Conditions Clear “Qualification Assessment: Edge” in Hollow Zero
Rewards
Polychrome Specialized Shock Chip Senior Investigator Log Bangboo System Widget Official Investigator Log

The Mystery of Arpeggio Fault is a roguelike gameplay mode in Hollow Zero, where Proxies can go through 5 stages of HDD Exploration Commissions in exchange for rewards and Knightboo!

All Events and Schedule

How to Unlock The Mystery of Arpeggio Fault

Mystery of Arpeggio Fault Requirements

Qualification Assessment

In order to unlock the Mystery of Arpeggio Fault event, Proxies must first clear the Qualification Assessment: Edge stage of Hollow Zero. After completing the requirements, Proxies can take on the challenge at Scott Outpost.

Qualification Assessment Guide

The Mystery of Arpeggio Fault Stages

All Areas in The Mystery of Arpeggio Fault

Stages Unlock
Stage 1:
Fault Surface
Progress through the commission The Mystery of Arpeggio Fault - Special Investigation.
Stage 2:
Old Observatory
Complete commission The Mystery of Arpeggio Fault - Special Investigation.
Finish exploring Fault Surface - Fault Floor
Stage 3:
Outpost Beacon
Complete commission The Mystery of Arpeggio Fault - Unravelling.
Finish exploring Old Observatory - Fault Floor
Stage 4:
Laboratory Ruins
Complete commission The Mystery of Arpeggio Fault - Final Puzzle Piece.
Finish exploring Outpost Beacon - Fault Floor
Stage 5:
Turbulent Corridor
Finish exploring Laboratory Ruins - Fault Floor

The Mystery of Arpeggio Fault is divided into 5 parts, each can be unlocked after completing certain commissions and different event stages prior.

How to Play The Mystery of Arpeggio Fault

The Mystery of Arpeggio Fault Guide

  1. Explore Through the HDD
  2. Bump Into Enemies to Defeat Them
  3. Upgrade The Tech Tree
  4. Select a Data File Before Exploring

Explore Through the HDD

Explore Through the HDD

Explore through 5 chapters of a brand new HDD in Hollow Zero. Deep dive into the different areas to look for items and complete your objectives.

Bump Into Enemies to Defeat Them

Bump Into Enemies to Defeat Them

Compare ATK and HP

Enemy Defeated

Bump into enemies to defeat them in exhcange for rewards and EXP. It is recommended to increase your ATK so you do not receive damage when the enemy's HP is less than or equal to your ATK.

Thus, always keep an eye on your HP and ATK before bumping into an enemy!

Upgrade The Tech Tree

Upgrade the Tech Tree

Use the Crimson Silk obtained from HDD exploration to upgrade the Tech Tree to enhance your skills, damage, and many more to make your experience more fun in the HDD.

As you progress through the event, you'll receive more Tech Tree nodes and Crimson Silk to customize your loadout and power up even more!

Select a Data File Before Exploring

Select a Data File before exploring to augment your play style inside the HDD. These Data Files provide various buffs, items, and more as you level up.

Like Tech Tree Nodes, you unlock Data Files one after another as you progress through each area.

The Mystery of Arpeggio Fault Agents

All Mystery of Arpeggio Fault Companions

Agent Stats and Effects
Anby ATK: 8, HP:25 Cost: 0
Anby has a 20% Crit Rate, dealing double DMG upon a critical hit.
Anton ATK: 10 HP: 28 Cost: 50
Anton will keep attacking even after his HP drops to 0, each attack thereafter will cause him to lose 1 ATK.
Ben ATK: 2 HP: 80 Cost: 25
When Koleda is on-field, Ben has a 50% chance to generate an explosive bomb when attacking.
Billy ATK: 30 HP: 10 Cost: 40
After the Protagonist takes DMG for the first time, Billy's ATK -15. Billy's attack range is 3.
Caesar ATK: 3 HP: 35 Cost: 30
Caesar has a 50% chance to reflect DMG when hit (taking no DMG and returning the DMG to the enemy).
Corin ATK: 20 HP: 10 Cost: 20
When Corin gains ATK, she'll gain +1 additional ATK.
Koleda ATK: 10 HP: 12 Cost: 25
When Ben is on-field, Koleda's attacks are guaranteed to be critical hits.
Lighter Lighter ATK: 5 HP: 40 Cost: 50
Lighter's ATK +20 while the Protagonist has less than 20 HP.
Nekomata ATK: 12 HP: 15 Cost: 10
Nekomata generates 100 Gear Coins when attacking.
Nicole ATK: 0 HP: 24 Cost: 20
Nicole's ATK equals 1/100 of the Coin count.
Soldier 11 ATK: 30 HP: 60 Cost: 60
Soldier 11's ATK will not increase.
Yanagi ATK: 5 HP: 22 Cost: 70
Enemies hit by Tsukishiro Yanagi will create a box, making it so only Yanagi can attack that enemy, and providing EXP equivalent of defeating that enemy everytime she attacks it.

Agents can accompany you as you explore the event's stages. You can unlock agents and increase the amount of agent companions through Contribution Points, which you receive by defeating enemies!

The Mystery of Arpeggio Fault Event Rewards

Get the Exclusive Bangboo: Knightboo

Requirements Rewards
Complete the exploration of fault Area 1
Complete the exploration of fault Areas 2 - 5
Zenless Zone Zero (ZZZ) Knightboo Core Knightboo Core x4

Completing the exploration of fault Area 1 will reward you with the event exclusive Bangboo, Knightboo!

You can also get its copies, the Knightboo Core, by exploring fault Areas 2 - 5. As of now, these are the only way to get copies of Knightboo.

Knightboo Bangboo Guide

All Mystery of Arpeggio Fault Rewards

All Event Rewards
ZZZ - Polychrome Polychrome ZZZ - Specialized Shock Chip Specialized Shock Chip ZZZ - Senior Investigator Log Senior Investigator Log
ZZZ - Bangboo System Widget Bangboo System Widget ZZZ - Official Investigator Log Official Investigator Log ZZZ - W-Engine Power Supply W-Engine Power Supply
ZZZ - Inter-Knot Credit Inter-Knot Credit ZZZ - Denny Denny

Total Rewards For Every Category

Category Rewards
Fault Surface
Denny Denny x30,000
Old Observatory
Denny Denny x30,000
Outpost Beacon
Denny Denny x30,000
Laboratory Ruins
Denny Denny x30,000
Turbulent Corridor
Denny Denny x30,000

Battle Pass Rewards

Requirements Rewards
Clear all stages in the Fault Surface region in "The Mystery of Arpeggio Fault"
ZZZ - City Fund EXP x1600
Clear all stages in the Outpost Beacon region in "The Mystery of Arpeggio Fault"
ZZZ - City Fund EXP x1600

Clearing all the stages in the Fault Surface and Outpost Beacon reagions in "The Mystery of Arpeggio Fault will reward you with a total of 3200 New Eridu City Fund EXP.

Note that you can claim this reward on the New Eridu City Fund menu and not on the event's menu.

New Eridu City Fund Battle Pass Guide

Zenless Zone Zero Related Guides

Zenless Zone Zero Events

All Events and Schedule

Ongoing Events

Event Guide Event Duration
Virtual Battlefield MayhemVirtual Battlefield Mayhem 11/11/2024 - 11/25/2024
All-New ProgramAll-New Program 11/06/2024 - 12/17/2024
Mystery of Arpeggio FaultMystery of Arpeggio Fault 11/06/2024 - 12/17/2024
TV ScheduleTV Schedule 11/06/2024 - 12/16/2024
The Final CallbackThe Final Callback 11/06/2024 - 11/27/2024

Past Events

Event Guide Event Duration
141 Exclusive Bazaar141 Exclusive Bazaar 08/02/2024 - 08/12/2024
141 Friendship Fair141 Friendship Fair 10/27/2024 - 11/04/2024
Camelia Golden WeekCamelia Golden Week 08/21/2024 - 09/23/2024
Coffee Sorcery: Combat SimulationCoffee Sorcery: Combat Simulation 09/04/2024 - 09/09/2024
Coffee Sorcery: TuningCoffee Sorcery: Tuning 09/18/2024 - 09/23/2024
Cunning GenerosityCunning Generosity 07/04/2024 - 08/13/2024
Daily Life of a Pubsec Officer EventDaily Life of a Pubsec Officer Event 08/30/2024 - 09/09/2024
DIY Bangboo Fan Art ContestDIY Bangboo Fan Art Contest 07/15/2024 - 07/28/2024
DonDon't Get Greedy 07/19/2024 - 07/26/2024
DonDon't Walk Alone 09/30/2024 - 10/14/2024
Facebook Group Prize EventFacebook Group Prize Event 07/06/2024 - 07/13/2024
First Class Customer ServiceFirst Class Customer Service 08/16/2024 - 08/26/2024
Friendship SupervisionFriendship Supervision 07/15/2024 - 08/05/2024
Golden Bangboo, I Got You! Prize EventGolden Bangboo, I Got You! Prize Event 07/04/2024 - 07/11/2024
Immersive Tactical DrillImmersive Tactical Drill 09/06/2024 - 09/16/2024
Masterful MasterpieceMasterful Masterpiece 07/24/2024 - 07/31/2024
New City VisitorNew City Visitor's Passport 07/04/2024 - 08/13/2024
New Eridu City Entry Special GiftsNew Eridu City Entry Special Gifts 07/04/2024 - 07/24/2024
Obsidian: Strategic PartnerObsidian: Strategic Partner 08/14/2024 - 09/25/2024
OverlordOverlord's Feast 09/26/2024 - 11/04/2024

Permanent Events

Event Guide How To Unlock/Rewards
Road to Proxy Greatness Event Guide Road to Proxy Greatness Reach Inter-Knot Level 8.
Rookie on the Road Event Guide Rookie on the Road Reach Inter-Knot Level 8.

All Web Events

Zenless Zone Zero Web Events
List of Web Events

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