Construction Ruins Guide

Construction Ruins is the third accessible zone in Hollow Zero. Learn how to unlock Construction Ruins, details for each stage, the best characters, and all its rewards!

How to Unlock Construction Ruins

Finish Chapter 2, Old Capital Metro Edge, and Street Lost to Memory

You can only unlock Construction Ruins after finishing Chapter 2, clearing Old Capital Metro: Edge, and completing Street Lost to Memory commission.

Talk to Ray at Scott Outpost after doing all of those to officially unlock the Construction Ruins

Construction Ruins Stage Info

Construction Ruins Stages
Frontline	Interior
Heartland	Core

Frontline Details and Walkthrough

Stage Info

Rec. Level	Level 30
Best Elements
Elements to Avoid

Best Characters

Attack	Anton Zhu Yuan
Stun	Anby Qingyi
Support	Nicole Rina
Anomaly	Grace

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Autonomous Support Unit - Guardian MK II
#2	Unknown Corruption Complex

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start the stage with a [Research] Resource Conversion and a random set of Resonium right off the bat. The Research Resonium will increase your damage by a certain percent for each 100 Gear Coins you spend.
2a	After getting the free rewards, you will meet The Opportunist. He will let you borrow Gear Coins that you will have pay later before fighting the final boss. You have the choice to ignore and reject his offer.
2b	Borrowing Gear Coins from The Opportunist comes with positive and negative effect. You will get back some Gear Coins for buying on the shop and receive a free Resonium. If you're unable to pay that amount, you will lose a number of Resonium depending on your current debt.
3	Follow the linear path to the right until you defeat the enemy at the end. You will receive Gear Coins, an Artifice Resonium (optional) and a character along the way.
4	The next area will have 3 paths you can take to reach the exit. However, moving around the tile will make a path become inaccessible.
	If you move a step to the right, the column you where standing before will be removed. If you move up or down, the previous row that you were standing on before will disappear.
5	Fight the Guardian MK II at the exit to proceed to the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	You will be blocked by The Opportunist at the start of Floor 2. You can borrow more Gear Coins, get additional resources, or ignore all his offers.
2	Collect all the rewards after talking to The Opportunist before proceeding to the last area using the transmission tile. Make sure to also claim the rewards on the right if you finish the first floor with an S grade.
3a	There will be three paths to choose from in the last area that similar to the disappearing tiles area in the first floor. After getting to the end, a similar area will spawn, but with five paths this time.
3b	You will meet The Opportunist again before reaching the exit. You will have to pay him your debt or he would take several Resonium from you.
4	Defeat the Unknown Corruption Complex at the exit to complete the stage.

Interior Details and Walkthrough

Stage Info

Rec. Level	Level 35-40
Best Elements
Elements to Avoid

Best Characters

Attack	Anton Zhu Yuan
Stun	Anby Qingyi
Support	Nicole Rina
Anomaly	Grace

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Autonomous Support Unit - Guardian MK II
#2	Greta - Overclocked
#3	Unknown Corruption Complex

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will get a [Research] Resource Conversion before starting the stage. It will increase your party's damage for every 100 Gear Coins you spent. You can also choose from a random set of Resonium after that.
2a	The Opportunist will appear after getting your free Resonium, offering loaning services. You can borrow Gear Coins for him or ignore his offer entirely.
2b	Borrowing Gear Coins will increase your spending power at the early part of the stage. Just remember to pay it off at Floor 3 before the final exit or you will lose several Resonium.
3a	You will spawn after the event in an area with a three-row path. The tile rows or columns will disappear depending on how you move around.
3b	Moving up or down will destroy the row opposite to your direction. Moving to the right will destroy the column on the left. This means you won't be able to go back once you've picked a direction, so path your way wisely!
4	Move around the area until you reach the Shop at the end. Spend some Gear Coins or just save it for the next area to get value out of the Research Resonium.
5	The same rule will apply to this newly unlocked area. However, you won't be able to avoid fighting enemies this time.
6	Head to the exit at the end and beat the floor bosses, which are two Guardian MK II, to proceed to the next one.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	Talk to The Opportunist blocking the way to get more Gear Coins or ignore his offer and pass through. He will also offer other services this time at the cost of HP or Gear Coins.
2	Explore the area and collect all the reward tiles before proceeding to the next area. You can claim the rewards on the right if you clear the first floor with an S grade. You can also destroy breakable walls for additional rewards, if there are any.
3	The next area will be the same with the ones on the first floor. The thing different this time is the vault, additional event tiles, and enemy at the end of the first part instead of the Shop.
4	Move through the tiles and collect all the things you deemed necessary until you reach the floor exit. Defeat Greta - Overclocked to proceed to the final floor.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	The start of Floor 3 is very similar to that of Floor 2. Talk to The Opportunist and explore the area to get rewards before heading to the final area.
2	The final area of this floor is also similar to Floor 1 and 2. The area will change depending on how you move, but you will have more options on where to go than the previous ones, as there are now five rows.
3	The Opportunist will be waiting next to the exit. You will need to pay your debt on this part or else you will lose several Resonium. You can also spend more Gear Coins on him if you have some to spare as you won't be able to use it anymore.
4	You will face the Unknown Corruption Complex at the exit. Defeat it to complete the stage and obtain its rewards!

Heartland Details and Walkthrough

Stage Info

Rec. Level	Level 40
Best Elements
Elements to Avoid

Best Characters

Attack	Anton Zhu Yuan
Stun	Anby Qingyi
Support	Nicole Rina
Anomaly	Grace

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Greta - Overclocked
#2	Hans - Overclocked
#3	Unknown Corruption Complex

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start off with a [Research] Resource Conversion Resonium that will increase your party's damage depending on how many Gear Coins you spend. You will also get a random set of Resonium that you can pick from.
2	After that, The Opportunist will show up and offer loaning services. You can borrow Gear Coins from him and get a free Resonium from him. You can also reject his offer if you want!
3a	The first area will consist of tiles with three rows. Moving around will cause the opposite row or column based on your direction to be destroyed, giving you limited options on how to go around the area.
3b	There will be tons of Event Tiles, Shops, and Gear Coins in the area so be sure to path your way wisely to get all your desired power-ups or rewards!
4	Move until you reach the end to the right to reach the exit. Beat Greta - Overclocked and proceed to the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	You will meet The Opportunist again and will ask if you want to borrow Gear Coins again. He will also offer a free service, which is either heal your squad or remove pressure, regardless if you borrow Gear Coins or not.
2	After talking to him, explore the surroundings and try to get as many items as you can to strengthen your squad. Don't forget to get the rewards on the right if you finish Floor 1 with an S rating!
3a	Head to the transmission to enter the next area. It will be similar to Floor 1's first area where rows or columns disappear depending on how you move. The only thing changed is that there are now five rows you can work around with.
3b	There will also be new Event Tiles, more Shops, vaults, more enemies, and Gear Coins. Work around those tiles carefully to get more items and rewards!
4	Defeat Hans - Overclocked once your reach the exit. It will be your ticket to the last floor.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	Same with Floor 2, you will meet The Opportunist at the start of Floor 3. He will offer the same thing as well, but it's best not to borrow Gear Coins at this point, as you might not be able to pay it in time.
2	Collect all the rewards and items around the area before heading to the transmission and to the next area. Remember to claim the rewards on the right if you get an S rating in the previous floor!
3a	Similar to Floor 2, it will have a 5-row layout but the tiles will be different. It will also have the same mechanic where the tiles will disappear depending on which direction you move, limiting your options.
3b	You will meet The Opportunist a tile before the floor exit. It will now be time to pay your debt, or you will lose several Resonium.
4	After talking to him, head over to the exit and fight Unknown Corruption Complex. Defeat it to clear the stage!

Core Details and Walkthrough

Stage Info

Rec. Level	Level 45-50
Best Elements
Elements to Avoid

Best Characters

Attack	Anton Zhu Yuan
Stun	Anby Qingyi
Support	Nicole Rina
Anomaly	Grace

Tier List and Best Characters

Enemies

Floor	Featured Enemies
#1	Autonomous Tactical Unit - Typhon Slugger Assault Gunner
#2	Friday - Energized
#3	Unknown Corruption Complex

List of All Enemies

Floor 1 Walkthrough

#	Floor 1 Walkthrough
1	You will start this stage with a [Research] Resource Conversion Resonium which boosts your damage every time you spend 100 Gear Coins. It will make spending Gear Coins on your run more beneficial because of that!
2	The Opportunist will appear after that, offering loaning services with interest. You can accept the offer so you can have more Gear Coins, increasing your spending power at the start.
3a	After talking to The Opportunist, you will spawn in an area that contains a five row of tiles you can travel around with. However, moving to a different tile will cause the tiles opposite to your direction to disappear, limiting the playing area. This will be the pattern for Floor 2 and Floor 3 as well!
3b	Each run will be different so try to path your way on the tiles with the most items or power-ups. Doing so will make it easier and faster for you to finish the stage.
4	Keep moving to the right until you reach the exit. You will need to fight and defeat the Typhon Slugger and Assault Gunner to get to the next floor.

Floor 2 Walkthrough

#	Floor 2 Walkthrough
1	You will start Floor 2 in a safe area where you can meet The Opportunist again. You can borrow Gear Coins from him and get additional services like random resonium, heal, and reduce pressure.
2	Explore the area after talking to The Opportunist and get all the rewards you can get, including the ones on the right if you get an S rating or grade from the previous floor! Head to the transmission after to proceed to the next area.
3	You will spawn in a similar area in Floor 1 where the tiles opposite from where you move will disappear. Scan the area and look for the best path to take to get more items. Keep moving until you reach the exit!
4	You will need to defeat Friday - Energized at the exit to reach the final floor.

Floor 3 Walkthrough

#	Floor 3 Walkthrough
1	Similar to Floor 2, you will start in a safe area where you can talk to The Opportunist again to borrow Gear Coins and his other services.
2	Get to all the tiles after talking to The Opportunist to get all the items and rewards before moving on to the final area. You can also get the rewards on the right side if you finish Floor 2 with an S rating.
3a	Head to the transmission to spawn in the final area. It will have the same mechanics as the first and second floor, so observe and try to move to the best path you can take for more rewards!
3b	The Opportunist will be waiting at the end near the exit. It will be the time to pay your debt or you will lose several Resonia depending on the value of your debt.
4	At the exit, fight and defeat the Unknown Corruption Complex to complete the stage and get its rewards!

Construction Ruins Recommended Resonia

Use Electric and Ether Resonia

The Electric and Ether Resonia are the best to use as their attributes are effective against most of the enemies in Construction Ruins. These Resonia will boost the Characters of the same attribute as well!

Resonia	Effects
Amplification Bracelet	Agents with Zap deal 25% more Electric DMG.
Conductive Coil	Dealing Electric DMG grants all squad members 1 stacks of Zap. This effect can trigger once every 3s.
Electric Baton	Inflicting Shock on an enemy grants all squad members 10 stacks of Zap.
EMP Grenade	Agent Electric DMG increases by 15%.
Hand Crank Generator	Agents deal 15% more DMG to Shocked enemies.
Lightning Rod	Dealing Electric DMG triggers Jolt, inflicting Electric DMG equal to 1,200% of ATK.
Lightning Trident	Hitting an enemy with an EX Special Attack grants all squad members 6 stacks of Zap.
Outdoor Battery	Increases the stack limit of Zap from 20 to 30. Dealing Electric DMG grants all squad members 1 stack of Zap. This effect can trigger once every 1s.
Stun Gun	Inflicting Shock on an enemy generates 10 Energy for all squad members. This effect can trigger once every 15s.
Thunder Whip	Shock lasts 3s longer.
Tesla Sphere	Agents generate 3% Decibels upon hitting a Shocked enemy. This effect can trigger once every 10s.
Electroboo	All squad members' Electric DMG increases by 10%.
Devilboo	All squad members' Ether DMG increases by 15%.
Plugboo	All squad members' Electric DMG increases by 15%.
Resonaboo	All squad members' Ether 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 Dodge Resonia

Most bosses, especially on Interior and higher stages, have attacks that cannot be parried (or perfect assisted) so try to get Dodge Resonia to inflict more damage and interval time when dodging those attacks.

Resonia	Effects
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%.
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

Construction Ruins Rewards

First Clear Rewards

Construction Ruins: Frontline

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Boopon x1 Investigation Point x1000 Withered Crystal: Ink-Yellow x400

Construction Ruins: Interior

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Withered Crystal: Ink-Yellow x600 Investigation Point x1500

Construction Ruins: Heartland

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Withered Crystal: Ink-Yellow x600 Investigation Point x1500

Construction Ruins: Core

First Clear Rewards
Inter-Knot Credit x600 Polychrome x80 Withered Crystal: Ink-Yellow x1000 Investigation Point x1500

Regular Rewards

Construction Ruins: Frontline

Regular Rewards
Investigation Point x1250 Bangboo Algorithm Module x9 - 10 Bangboo System Widget x3 - 4 Withered Crystal: Ink-Yellow x200 Denny x1200

Construction Ruins: Interior

Regular Rewards
Investigation Point x2500 Bangboo System Widget x8 - 11 Withered Crystal: Ink-Yellow x300 Denny x2000

Construction Ruins: Heartland

Regular Rewards
Investigation Point x3000 Bangboo System Widget x10 - 13 Withered Crystal: Ink-Yellow x400 Denny x2815

Construction Ruins: Core

Regular Rewards
Investigation Point x3500 Bangboo System Widget x13 - 16 Withered Crystal: Ink-Yellow x500 Denny x3380

Zenless Zone Zero Related Guides

Hollow Zero Guide

List of Hollow Zero Zones

List of Hollow Zero Upgrades and Mechanics