Old Capital Metro is the second accessible zone in Zenless Zone Zero (ZZZ). Learn how to unlock Old Capital Metro and see the best characters, list of enemies, and walkthrough for each level here!

How to Unlock Old Capital Metro

Reach Inter-Knot Level 21 and Clear Old Capital Metro Frontline

Old Capital Metro will only unlock after reaching Inter-Knot Level 21 and completing the Old Capital Metro: Frontline in Hollow Zero.

The other stages in Old Capital Metro will become available after reaching levels 25, 30, and 40, respectively, and completing some commissions in the Main Story.

Old Capital Metro Stage Info

Old Capital Metro Stages
Edge	Frontline	Interior
Heartland	Core	-

Edge Details and Walkthrough

Stage Info

Rec. Level	Level 25
Total No. of Floors	2 Floors
Best Elements
Elements to Avoid	None

Best Characters

Attack	Ellen Zhu Yuan
Stun	Lycaon
Support	Nicole Soukaku

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Dullahan Thanatos
#2	Dead End Butcher

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	Follow the path until you pass the second enemy tile on the screen. You will get a few rewards like a Bangboo, Artifice Resonium, and a character.
2a	After defeating the last enemy tile on the board, you can immediately go to the exit or pass all the tiles to get the other rewards.
2b	If you decide to pass through all the tiles, you will eventually hit a Random Tile in the middle. This will take you to a random separate area, like the Codenamed: 0011, 0020, and 7777, where you can get more rewards.
3	Defeat the bosses at the exit, Dullahan and Thanatos, to reach the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	The starting area in Floor 2 doesn't have any enemies on it. Collect all the rewards and pass through all events, including the ones on the right if you finish Floor 1 with an S grade.
2a	Proceed to the transmission tile above to get to the next area. It will have 2 paths leading to the final exit. You can do go through all of them for extra rewards if you wanted, but be prepared to fight on enemies on the red tiles.
2b	The big two tiles (Double Crisis Tiles) on the edges are will spawn rewards after beating the enemies.
3	Head to the exit and defeat Dead End Butcher to clear the stage.

Frontline Details and Walkthrough

Stage Info

Rec. Level	Level 30
Total No. of Floors	2 Floors
Best Elements
Elements to Avoid	None

Best Characters

Attack	Ellen Zhu Yuan
Stun	Lycaon
Support	Nicole Soukaku

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Dullahan Thanatos
#2	Dead End Butcher

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will encounter Masked Scholar at the start. You can take his offer to get a Resonium, but comes with a Corruption, or reject it and proceed to the next area.
2a	You will be a bit closer to the exit, which is in the lower right corner. You can go there immediately to save time, but you won't get as much Resonia and other helpful items if you do.
2b	If you decide not to go to the exit immediately, you can go to the huge red tile (Double Crisis Tile) to fight enemies and get multiple rewards from the nearby tiles it occupies. You can also fight the remaining enemies and the tiles they block for additional rewards.
3	Once you reach the exit, you will fight two elites, Dullahan and Thanatos. Defeat both to get to the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	You will be blocked by the Masked Scholar again at the start of Floor 2. This time, he will offer you items that mostly give positive effects for your run.
2a	Explore the whole area and don't forget to claim the rewards on the right if you cleared the first floor with an S grade.
2b	You can also unlock the Bank Zero on the left where you can deposit items to earn points and withdraw rewards.
2c	Additionally, check for breakable walls in the area as they always contain useful rewards.
3	Once you're done exploring the area, go to the transmission above to get to the final area where the exit is located.
4a	In the next area, you can head down and go straight to the exit to fight the boss or go up and try to reach the Shop on the other side to use your remaining Gear Coins.
4b	If you decided to go to the Shop, note that you will pass through Unknown Tiles that contain randomized tiles that can be good or bad for your run.
5	You will need to defeat the Dead End Butcher at the exit to complete the stage and get your rewards!

Interior Details and Walkthrough

Stage Info

Rec. Level	Level 35-40
Total No. of Floors	3 Floors
Best Elements
Elements to Avoid	None

Best Characters

Attack	Ellen Zhu Yuan
Stun	Lycaon
Support	Nicole Soukaku

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Notorious - Armored Hati
#2	Notorious Dullahan
#3	Dead End Butcher

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start the stage with a [Research] Overload Distribution Resonium that heals and increases your team's overall damage depending on the number of Corruption you currently have. You will also get a random set of Resonium that you can pick from.
2	The Masked Scholar will appear afterward and offer you 2 A-Rank Resonium in exchange for having two Corruptions. Accepting his deal will allow you to get early Corruption and get more value out of the [Research] Overload Distribution.
3a	You will get to the first area after talking to the Masked Scholar. You can take two paths here, but you won't be able to avoid a fight on the Double Crisis Tile whichever path you take.
3b	You can also pass all the tiles here before heading to the exit and get at least one more Corruption to get a buff from the Research Resonium and also get more rewards in Floor 2 from the Masked Scholar. If you want more Corruption, you can use the Medicine Information Leaflet to get more.
4	You will face an Armored Hati at the exit. Defeat it to get to the next floor.

Floor 2 Walkthrough

#	Floor 1 Walkthrough
1	The Masked Scholar will be blocking the way at the start of Floor 2. He will offer you a number of "help" that will depend on how many Corruptions you have.
2	After receiving a help from the Masked Scholar, explore the area and start collecting the rewards. Don't forget to claim the rewards on the right side as well if you get an S rating from the previous floor!
3a	The next area will have two paths leading to the exit. You won't be able to avoid fighting on the Double Crisis Tile whichever path you choose, similar to Floor 1.
3b	If you have 5 Corruptions already, you shouldn't have to worry if you walk on all the tiles to get all the rewards. Otherwise, you can just follow the shortest path if you want to reach the exit quickly.
4	You need to defeat the Dullahan at the exit to proceed to the last floor.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	You will enter the area similar to Floor 2. You will be blocked by the Masked Scholar and you can claim all the rewards before heading to the final area.
2a	The final area consists of two paths to the exit in the middle. You can go all through the tiles and try to get more Resonium to help you with the boss fight, or you can take the safe route to the right until you reach the exit.
2b	You can also consider getting rid of the Corruptions you have from the tiles in the area. It might hinder you from the boss fight, especially if you have the Purple Corruption that boosts the damage and heals the Dead End Butcher.
3	Fight and defeat the Dead End Butcher in a two-phase boss fight once you reach the exit to complete the stage!

Heartland Details and Walkthrough

Stage Info

Rec. Level	Level 40
Total No. of Floors	3 Floors
Best Elements
Elements to Avoid	None

Best Characters

Attack	Ellen Zhu Yuan
Stun	Lycaon
Support	Nicole Soukaku

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Notorious - Thanatos
#2	Notorious - Armored Hati
#3	Dead End Butcher

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start the stage with a [Research] Overload Distribution Resonium which heals your squad and increases their damage for each Pressure Overload you get in this stage.
2	The Masked Scholar will pop up after getting the Resonium. He will offer you to get 3 Corruptions right from the get-go in exchange for 3 A-Rank Resonium. If you still have those Corruptions at the start of Floor 2, you can get additional help from the Masked Scholar when you meet him.
3a	The first area will look like an "S" shape. You will spawn in the middle left while the exit will be on the opposite side of your position.
3b	You can head straight to the exit if you want to save time and get to the next floor quickly, or you can pass through all the tiles and get as many Resonium as you can to get stronger.
4	You will face one Thanatos once you reach the floor exit. Defeat it and head to proceed to the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	You will meet the Masked Scholar at the start of Floor 2. He will give you a number of support depending on how many Corruptions you have.
2	Explore all the tiles after talking to the Masked Scholar so that you can get all the rewards before proceeding to the next area. Don't forget to grab the rewards on the right if you got an S rating in the first floor.
3a	Head to the transmission after exploring to enter the next area. You will spawn in the middle once you enter the transmission.
3b	You can reach the exit quickly if you take the path above and moving to the right. You can also explore the other tiles and get more Resonium to strengthen your squad before taking on the floor boss.
4	You will face two Armored Hati once you reach the exit. Defeat them to get to Floor 3.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	Same with the start of Floor 2, the Masked Scholar will be at the start of Floor 3 as well. He will offer you again a number of help depending on the number of Corruptions you have. He will also catalyze the [Research] Overload Distribution to boost its effect.
2	Explore the area after talking to the Masked Scholar to power-up your squad more before moving to the next area. Don't forget to claim the rewards on the right if you cleared the previous floor with an S rating!
3a	The next area will be the last for this stage. You will spawn at the middle and the exit will be at the bottom middle part.
3b	You can either take the path to the left for a safer way to get to the exit, or go to the right to and face an enemy there. You can also take both if you want to maximize the power-ups you can get before fighting the last boss!
4	The Dead End Butcher will be waiting at the exit. Defeat it in a two-phase boss battle to clear the stage.

Core Details and Walkthrough

Stage Info

Rec. Level	Level 45-50
Total No. of Floors	3 Floors
Best Elements
Elements to Avoid	None

Best Characters

Attack	Ellen Zhu Yuan
Stun	Lycaon
Support	Nicole Soukaku

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Goblin Notorious - Thanatos
#2	Thanatos Notorious Dullahan
#3	Newborn Dead End Butcher

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start the stage with a [Research] Overload Distribution Resonium that will heal your characters and increase their damage every time pressure reaches 100, which causes an overload and get a Corruption.
2	The Masked Scholar will appear after getting the Resonium and offer you three A-Rank Resonium in exchange for three Corruptions. You will get value out of getting the Corruptions because of the Research Resonium you get earlier.
3a	After talking to the Masked Scholar, you will spawn at the top left part of the area, far away from the exit at the bottom left. It's best to clear all the tiles before heading to the exit to get all the buffs and increase the number of Corruptions.
3b	Increasing or maxing out the number of Corruptions will get you more help from the Masked Scholar in the next floor.
4	Head to the exit and defeat the Goblin and Notorious Thanatos to reach the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	Floor 2 will start in a safe area where you will have no choice but to meet the Masked Scholar again. He will offer you a number of assistance based on the number of Corruptions you have (maximum of 5).
2	Collect all the rewards in the area after talking to the Masked Scholar. You should also get the rewards on the right if you cleared floor 1 with an S rating or grade. Head to the transmission above once you're done!
3a	You will spawn at the bottom middle, surrounded by two Double Crisis tiles and Vault tiles (Quarantine Gates). The exit will be on the opposite side, and you can get there quickly by going straight upward.
3b	You can choose to clear all other tiles in the area and start removing some of your Corruptions to make it a little easier when fighting enemies and the floor boss. Otherwise, continue building up Corruptions to get more value from your Resonium.
4	Once you reach the exit, you will face Thanatos and Notorious Dullahan. Defeat them to reach the final floor.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	Same with Floor 2, you will start in a safe area where the Masked Scholar is blocking the way. He will give you the same help as well once you talk to him.
2	Explore the area and don't forget to claim your rewards on the right if you get an S rating or grade in the previous floor! Head to the transmission to proceed to the next area.
3a	You will spawn on the left in the middle in the next area, while the exit will be on the opposite side of your position. You can reach the exit quickly if you go straight to the right.
3b	It's best to remove all your Corruptions at this point to reduce the difficulty of the boss fight. Aim to remove the Shadow Horror V as it boosts the damage of the Newborn Dead End Butcher, which can be fatal for undergeared characters if they get hit.
4	Defeat the Newborn Dead End Butcher at the exit to clear the stage and get all of its rewards!

Old Capital Metro Recommended Resonia

Use Freeze and Ether Resonia

You should aim for Freeze (Ice) or Ether Resonia, as they are the best attributes in Old Capital Metro stages. It will boost the power and add more abilities for the Characters with the same attribute.

Resonia	Effects
Cutie Cold Pack	Agent Ice DMG increases by 15%
Freezing Gun	Upon triggering Shatter, the Agent inflicts additional Daze equal to 140% of Impact on the target if the target is not Stunned.
Ice Bag	Freezing an enemy increases the Agent's DEF by 5%, stacking up to 4 times.
Ice Bucket	Launching an EX Special Attack grants the Agent 8 stacks of Ice Mark.
Ice Cube Tray	When an Ultimate hits an enemy and deals Ice DMG, the Agent gains 36 stacks of Ice Mark.
Ice Maker	Freezing an enemy increases all squad members' CRIT DMG by 40% for 15s.
Ice Shaver	Shatter DMG increases by 50%. When Shatter is triggered, hitting enemies increases the Agent's Ice Anomaly Buildup Rate by 20% for 5s.
Icicle Shooter	Triggering Shatter leaves an icy mist that lasts 10s. This effect can trigger once every 10s. Ice DMG against enemies caught in the mist deal 80% more CRIT DMG.
Portable Cooler	Freeze lasts 2s longer.
Portable Ice Maker	Freezing an enemy grants all squad members 12 stacks of Ice Mark.
Freezing Spray	Triggering Ice Mark increases the Agent's Ice Anomaly Buildup Rate by 30%.
Devilboo	All squad members' Ether DMG increases by 15%.
Penguinboo	All squad members' Ice DMG increases
Resonaboo	All squad members' Ether DMG increases by 15%.
Sharkboo	All squad members' Ice DMG increases by 15%.
Scrap Amplifier	Each point of Anomaly Proficiency increases the Agent's Ether DMG by 0.2%, up to a maximum increase of 30%.
Rusty W-Engine	Corruption DMG increases by 40%
Net Launcher	Agents deal 30% more DMG to Corrupted enemies.
Trashed Harpoon Gun	Inflicting Corruption on an enemy grants 1 stack of Activity to all squad members. Corrupted enemies have their Ether Res reduced by 20%.
Unstable Tranquilizer	Dealing Ether DMG to an enemy increases Attribute Anomaly DMG 50% against the target for 10s.
Collective Emblem	Increases the chance for [Ether] Resonia to appear.
Frozen Timer	Agent Ether DMG increases by 15%.
Depleted Battery	Agent Ether Anomaly Buildup Rate increases by 15%.
Broken Chip	Launching a Chain Attack increases all squad members' Anomaly Proficiency by 25 for 15s.
Faulty Jammer	Corrupted enemies have their ATK reduced by 15%.
Deteriorating Filter	Dealing Ether DMG grants all squad members 1 stack of Activity. This effect can trigger once every 10s.
Suppressive Bracelet	Launching an EX Special Attack grants 1 stack of Activity to all squad members.
Cracked Drive	Corruption lasts 2s longer.
Invalid Adapter	Each Standard Ether type Resonium owned increases Agent Ether Anomaly Buildup Rate by 4%, up to a maximum increase of 32%.

Consider Getting Assist and Dodge Resonia

Since the set of Resonia that will appear is mostly random, you can also get Assist or Dodge Resonia. They will be good against the bosses in this stage, especially against their numerous attacks!

Resonia	Effects
Activity Transfer Device	Triggering Perfect Assist increases all squad memers' CRIT DMG by 15% for 10s.
Backup Shield Generator	Triggering Perfect Assist grants the Agent a Shield equal to 6% of their Max HP for 10s.
Dynamic Calibration Device	Triggering Perfect Assist grants all squad members 1 stack of Insight.
Dynamic Sensors	Triggering Perfect Assist increases all squad members' CRIT DMG by 48% for 30s. All squad members gain 1 stack of Acuity.
Emergency Enhancement Device	Triggering Perfect Assist increases all squad members' CRIT DMG by 20% for 10s.
Ether Reaction Device	Triggering a Perfect Assist increases all squad members' Anomaly Buildup Rate by 20% for 10s.
Hand Operated Generator	Triggering Perfect Assist generates 5 Energy for the Agent. This effect can trigger once every 5s.
HF Communicator	Triggering Perfect Assist generates 5% Decibels.
Holographic Decoy	Hitting enemies with an Assist Follow-Up increases all squad members' PEN Ratio by 10% for 15s.
Hydraulic Buffer	Assist Follow-Up DMG increases by 70%.
Impact Feedback Device	Triggering Perfect Assist grants all squad members 1 stack of Rush
Gate Breaker	Vital View triggered by Evasive Assist lasts 5s. Defensive Assist inflicts 30% more Daze.
Hard Hat	Using Dodge increases the Agent's DEF by 20% for 5s.
Rugby Ball	On triggering a Perfect Dodge, all squad members gain 1 stack of Agility, and DMG dealt is increased by 30 for 15s.
Shuttlecock	On triggering Perfect Dodge, Agents gain 1 stack of Agility and enter Vital View for 4s This effect can trigger once every 10s.
Skate Shoes	Dodge Counter DMG increases by 35%
Skateboard	When in the Counter state, Anomaly Buildup Rate increases by 20% and CRIT DMG increases by 40%.
Skis	Triggering a Dodge Counter generates 5 Energy for the Agent.
Sneakers	Perfect Dodge is easier to trigger
Yoga Ball	The post-Dodge Dash Attack is replaced by Dodge Counter. This effect can trigger once every 5s. Triggering this effect grants the Agent 1 stack of Agility.
Tennis Racket	When entering Vital View by triggering Perfect Dodge, the post-Dodge Dash Attack is replaced by Dodge Counter that can be used repeatedly up to 4 times.
Fencing Sword	Extends the duration of the Counter state by 5s.
Killer Paddle	Upon being attacked, quickly press Dodge to immediately break free and recover 50% of the DMG taken as HP. This effect can trigger once every 6s.
Magnetic Dart	When in the Counter state, Agent EX Special Attacks and Dodge Counter Interrupt level is increased, and all Agents' DMG increases by 50%.
Tactical Analyzer	Triggering Perfect Dodge or Chain Attack additionally restores 1 Assist Point and increases the Agent's DMG by 45% for 128.
Sports Shades	Dodge Counter DMG increases by 50% and Daze inflicted increases by 30%.

Most Resonia That Will Appear is Random

Most of the Resonia you will get are random unless they are indicated in the Shop or special event tiles. It means you won't have full control on which Resonia will appear, but you can always refresh it if you have unlocked Resonium Converters from the Combat Configuration!

List of All Resonia

Old Capital Metro Rewards

First Clear Rewards

Old Capital Metro: Edge

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Boopon x1 Withered Crystal: Heaven's Azure x400 Investigation Point x1000

Old Capital Metro: Frontline

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Withered Crystal: Heaven's Azure x400 Investigation Point x1000

Regular Rewards

Regular Rewards
Investigation Point x1000 Withered Crystal: Heaven's Azure x400 Bangboo Algorithm Module x7 - 8 Bangboo System Widget x2 - 3 Denny x675

Old Capital Metro Recommended Level

Around Level 25 to 45

The level you should aim for when taking on the Qualification Assessment should be around 25 to 45 for both Characters and W-Engines to survive and finish all the stages.

Use the necessary level up and promotion (ascension) materials to increase their level. You can use the Combat Simulation to get those rewards if you don't have enough!

How to Level Up Characters

Zenless Zone Zero Related Guides

Hollow Zero Guide

List of Hollow Zero Zones

All Hollow Zero Zones
Qualification Assessment	Old Capital Metro
Construction Ruins	Abandoned Skyscraper
Withering Garden Guide	Inferno Reap
Lost Void

List of Hollow Zero Upgrades and Mechanics

Hollow Zero Upgrades and Mechanics
Resonia	Corruption