Hollow Zero Guide - How To Unlock & Farm Z-Merits

Hollow Zero guide in Zenless Zone Zero (ZZZ). Check when you unlock Hollow Zero, farm Z-Merits, stage list and license level rewards.

Training & Challenges
Combat Simulation	Routine Cleanup	Expert Challenge
Notorious Hunt	Hollow Zero	Shiyu Defense

Hollow Zero List & How to Unlock

Hollow Zero Stages List

Hollow Zero's stages have requirements to unlock them in addition to the Qualification Assessment in Chapter 1. In order to play the current final area, Withering Garden, you must complete Main Story Chapter 3 and the surrounding three areas, and raise your Inter-Knot Level to 45.

Hollow Exploration in Random Map Format

Hollow Zero is a challenge where you explore randomly generated maps. Although there are some unique rules, the basics are the same as Hollow Exploration.

Unlocked in Main Story Chapter 1

Hollow Zero is unlocked by progressing through Main Story Chapter 1. You will need to drive to Scott Outpost when you unlock it, but once it is unlocked you will be able to warp there from your Compendium.

How to Progress Quickly

Hollow Zero Strategy Flow

Unlock the Old Capital Metro Stage First

To progress efficiently through Hollow Zero, first aim to unlock the second stage, Old Eridu Train. As you advance through the story and increase your level via Combat Simulation and sub-quests, these stages will unlock automatically.

Check Current Bounty Commissions

Bounty Commissions are Hollow Zero exclusive missions that reset every Monday. You can receive rewards by completing the Special Commissions on the far left up to four times, and Basic Commissions from S to B on the right once each, so be sure to understand the mission details in advance.

Basic Commissions Can Be Modified Up to Two Times

Basic Commissions can be changed up to twice a week by clicking the update button on the top right. However, once you achieve B rank Commissions, you will not be able to update it, so if you think it will be difficult to achieve rank S, try updating first.

Do Old Capital Metro stages or higher levels

When playing Hollow Zero, it is recommended to run Old Capital Metro or higher level stages to get Withered Crystals. Withered Crystals are required to activate Hollow Zero's exclusive Buff, Combat Configuration.

Activate Buffs with Combat Configuration

Once you have Withered Crystals, you can strengthen your squad from Combat Configuration in the bottom right corner. There are no restrictions on obtaining Withered Crystals, so you can unlock them from the left in any order.

[Weekly] Collect Investigation Points to the Limit

Investigation Points are the experience points required to increase your License Level. There is a limit to how many points you can earn each week, so ideally you'll be able to collect up to the limit by Monday's reset.

Increase Your License Level and Earn Rewards

You can check your License Level from the icon on the bottom left and receive rewards for each level. You will need a large amount of Investigation Points to reach the maximum level of 60, so repeat steps 2 to 5 every week to gradually raise your level.

[Monthly] Exchange for Items at Outpost Logistics

At the frontline base, there is an NPC who will exchange items for the Z-Merits that can be obtained by completing Bounty Commissions. The item inventory is reset every month, so be sure to exchange the items you want by the end of the month.

No Need to Challenge the Higher Difficulty Level

Hollow Zero has some challenging battles, so there is no need to do the higher difficulty levels if it's difficult. The only difference is that you get more Investigation Points and items in one round, so proceed at your own pace while strengthening your characters.

Rewards You Can Get in Hollow Zero

1. Stage Clear Reward

As stage clear rewards, you can mainly get Bangboo's level up materials and Denny. Since it does not consume Battery Charge (stamina), it is recommended for enhancing your Bangboo.

2. Bounty Commissions

Bounty Commissions are Hollow Zero's exclusive missions that reset weekly. In addition to Bangboo's Enhancement Materials, you can earn valuable items such as Polychromes and Boopon.

3. License Level

You can receive various rewards each time your License Level increases by 1. Although you can only get it once, you can get a large amount of Polychromes and Boopons.

4. Research Progress

After unlocking the Old Capital Metro stage, talk to the NPC, Ray, in the tent and you will receive progress rewards based on your progress like the Resonia Collection in Hollow Zero. This is also a reward you can only get once, but you will meet the requirements sooner or later so be sure to check back regularly.

5. Outpost Logistics (Z-Merits Shop)

The NPC, Casper, outside the tent will exchange items for the Z-Merits you have collected in Hollow Zero. Item inventory is reset on the 1st of every month, so be sure to exchange the items you want before the month changes.

Zenless Zone Zero Related Guides

Recommended Guides

Recommended Guides
Reroll Tier List	Early Game Guide	Wise/Belle Difference	Redeem Codes
Best Characters	Best Team Comps	Best W-Engines	Best Bangboos
Story Commission	Side Commission	Gacha List	Event List
Combat System	Enhancing Agents	Best Settings	What to Do Daily
Databases
Character List	W-Engine List	Bangboo List	Voice Actor List
Collectibles
Disc Farming	Mewmew	HIA Coins	Cargo Trucks

Other Recommended Guides

Other Recommended Guides
Free 100 Gacha Pulls	How to Reroll	Best A-Rank Agent
Pre-Registration Event	System Requirements	Multiplayer & Co-Op

Shops and Features

Shops and Features
Mewmew	Coffee Shop	Noodle Shop
Newsstand	Remodeling Shop	Music Store
Arcade	Gadget Store	Convenience Store
Sage in a Barrel

Characters (Agents)

S Rank Characters

A Rank Characters