Zenless Zone Zero Construction Ruins Guide

Introduction to Zenless Zone Zero Construction Ruins Guide

Construction Ruins is the third zone players can explore in Hollow Zero, offering a new layer of challenge and complexity compared to earlier zones. Characterized by its rugged, unfinished environment and maze-like layout, this area pushes players to make more strategic decisions and adapt to new mechanics. Within Construction Ruins, players will encounter a mix of combat stages, puzzle-like scenarios, resource management challenges, and unique event squares that test both preparation and adaptability.

This guide provides a straightforward walkthrough of all event squares within the Construction Ruins zone in Zenless Zone Zero, including details on objectives, enemies, optimal routes, and tips for maximizing efficiency in each stage. Whether you’re looking to secure full clear rewards or optimize your run paths, this guide breaks down everything you need to know to navigate the Construction Ruins effectively.

How to Unlock Construction Ruins

Unlocking the Construction Ruins zone in Hollow Zero requires completing a series of key progression milestones across both the main story and side content. There are three main prerequisites that must be fulfilled before the zone becomes accessible. First, players must complete Main Story Chapter 2, which advances the narrative and unlocks additional gameplay features necessary for exploring new zones.

Next, players need to finish the Old Capital Metro and Outer area, both of which are essential for gaining access deeper into the Hollow. Alternatively, clearing the Old Capital Metro: Edge stage will also satisfy this requirement. Finally, players must complete the sub-quest titled “The Forgotten City.” As an alternative path, finishing the “Street Lost to Memory” commission will also fulfill this condition. Once these three requirements are met, players must visit Ray at the Scott Outpost. Speaking with Ray will trigger the final step, officially unlocking the Construction Ruins and making it available as a new area to explore in Hollow Zero.

Detailed Stage Walkthroughs and Strategies

Construction Ruins Frontline

The Frontline stage is the introductory level of Construction Ruins and is recommended for players at or above Level 30. The most effective elements here are Ether and Electric, while Physical and Fire elements are generally less effective against the enemies encountered. Top-performing characters for this stage include Anton and Zhu Yuan for attack roles, Anby and Qingyi for stun support, Nicole and Rina for team utility, and Grace or Yanagi for Anomaly builds.

On Floor 1, the run begins with a [Research] tile for Resource Conversion, which grants a random Resonium. Players will soon encounter The Opportunist, who offers a chance to borrow Gear Coins—these come with both potential benefits and drawbacks, depending on the choices made. The path proceeds linearly to the right, leading into a section with disappearing tiles that must be carefully navigated. At the end of this path, players will face the first boss: Guardian MK II, a durable mechanical enemy that requires coordinated burst damage and efficient timing.

Floor 2 brings another encounter with The Opportunist, offering additional loans. Players can also claim rewards from previous floors, including those earned for an S-grade performance. The floor features another tile-based navigation puzzle, beginning with three branching paths that expand into five. The Opportunist reappears to collect any outstanding debts. The final battle of this floor is against the Unknown Corruption Complex, a challenging foe that demands proper element usage and sustained damage.

Construction Ruins Interior

Interior raises the difficulty and is best tackled at Levels 35–40. The recommended elements and team compositions remain the same, but players can now consider including Harumasa as a strong attacker for his Electric capabilities.

Floor 1 opens with another [Research] Resource Conversion tile and random Resonium. The Opportunist again appears, offering loans with varying consequences. The first navigation challenge involves a narrow three-row layout with disappearing tiles. After clearing this area, players can visit the shop before heading into a combat zone. This section culminates in a double boss battle against two Guardian MK II units, requiring efficient crowd control and elemental synergy.

On Floor 2, The Opportunist offers more than just loans, including other support services. The first area provides opportunities to collect S-grade rewards and discover hidden paths through breakable walls. The second area replaces the shop with a vault guarded by an enemy. At the end, players must defeat Greta – Overclocked, a powerful variant with enhanced attack patterns.

Floor 3 begins with The Opportunist again, with more options for trades or recovery. Players explore reward-rich zones before entering another area with a five-row disappearing tile layout. After settling any debts, the final encounter is with the Unknown Corruption Complex, now appearing with additional abilities and aggression.

Construction Ruins Heartland

The Heartland stage is suitable for players around Level 40. The elemental and character recommendations remain consistent, with Electric and Ether builds dominating the meta for this zone.

Floor 1 starts with a [Research] Resonium event and another loan opportunity from The Opportunist, who also offers a free Resonium. The path ahead consists of a three-row grid of disappearing tiles. Players should prioritize Event Tiles, Shops, and Gear Coins while navigating this area. The boss at the end is Greta – Overclocked, a fast and relentless opponent that punishes poor positioning.

On Floor 2, The Opportunist offers loans and free support services, such as healing or pressure removal. The first area is dense with rewards, while the second expands to a five-row tile grid with increased complexity. Expect to find more Event Tiles, Gear Coins, enemy ambushes, vaults, and shops. The floor ends with a battle against Hans – Overclocked, another high-powered enemy that demands careful timing and effective resource use.

Floor 3 begins with The Opportunist—this time, it is recommended to avoid taking loans to preserve end-of-stage rewards. The first area includes S-grade reward opportunities. The second area returns to a five-row tile format with added hazards. After resolving any debts, players face the final boss: the Unknown Corruption Complex, now enhanced with high durability and punishing debuffs.

Construction Ruins Core

Core is the most difficult stage of Construction Ruins, recommended for players between Level 45 and 50. The Ether and Electric elements remain optimal, while Physical and Fire should still be avoided. This stage requires advanced planning and fully developed teams. Anton, Zhu Yuan, and Harumasa remain strong attackers, with Anby, Qingyi, Nicole, Rina, Grace, and Yanagi maintaining their crucial roles in support, stun, and anomaly.

Floor 1 starts with a [Research] Resonium event. The Opportunist appears again, now offering loans with increased risk, including interest accumulation. Navigation involves a five-row layout filled with disappearing tiles, where careful movement is critical to avoid losing progress or missing key rewards. The floor concludes with a dual boss fight against Typhon Slugger and Assault Gunner, who attack in coordinated patterns and must be prioritized accordingly.

On Floor 2, The Opportunist appears in a designated safe zone, providing additional services. The first area is packed with rewards, including hidden paths and S-grade chests. Players must then traverse the second area, a disappearing tile puzzle filled with branching routes. At the end of this segment, players must face Friday – Energized, a volatile enemy with erratic behavior and powerful AOE attacks.

Floor 3 features one final appearance of The Opportunist in a safe zone, along with another opportunity to collect high-value rewards. The second area mirrors the layout of previous tile puzzles but ramps up the difficulty with more traps and aggressive encounters. After resolving any debt with The Opportunist, the final boss awaits: the Unknown Corruption Complex, now at its most dangerous state, requiring maximum team coordination and optimized rotations to defeat.

Construction Ruins Stage Strategy Tips

Mastering the Construction Ruins zone in Hollow Zero requires a balanced approach to resource management, strategic movement, and risk-taking. One of the core mechanics to take advantage of is borrowing Gear Coins. Construction Ruins features numerous Gear Coin slots and shops, making it an ideal stage to actively engage in the Resonia Collection system. Investing borrowed Gear Coins into Resource Conversion Resonia can significantly boost your team’s performance. Specifically, damage dealt increases proportionally with the total Gear Coins consumed—reaching the 10,000 Gear Coin threshold grants a powerful 50% damage boost across the board.

Repaying your debt fully is also critical. Once your loans are paid off, an additional Resonia effect activates, increasing the damage dealt by 30% for Assist Follow-Up attacks and Dodge Counters. This effect adds a tactical layer of payoff for players who carefully manage their economy and repay in time. Additionally, the Piggy Bank Crate Resonia Collection effect introduces Cashback Rebates—essentially returning a portion of spent Gear Coins. The higher the debt repaid, the larger the cashback reward, incentivizing high-risk, high-reward strategies.

However, failing to repay borrowed amounts in full can result in severe penalties, primarily the loss of a large number of collected Resonia, which directly impacts combat bonuses and score potential. To avoid this, it’s recommended to borrow the maximum loan amount per tier during Basic stages, as higher debt correlates with better cashback and potential value through Resonia upgrades.

Route planning is also essential due to the unique disappearing tile system. Once a path is chosen, you cannot backtrack, and the number of rows or columns available may shrink as you progress. It’s generally best to prioritize routes that move toward the right side of the map, aiming for edge tiles at the top or bottom that typically contain more valuable rewards. Always identify your end goal first and take the shortest possible route to reach it efficiently while maximizing encounters with high-reward squares like Shops, Event Tiles, and Gear Coin opportunities.

Recommended Team Composition and Resonia Collection

The Construction Ruins zone is designed around strategic planning and efficient resource usage, rewarding players who take calculated risks and maximize Gear Coin management. One of the core mechanics in this zone is the ability to borrow Gear Coins through interactions with The Opportunist. These borrowed coins can then be used at the many shops and Resonia Collection slots scattered throughout each floor. Investing in Resonia Collection is crucial, as it provides powerful combat enhancements tailored to your team’s attributes.

A key strategy is to prioritize using Gear Coins on Resource Conversion Resonia effects. These effects scale directly with the amount of Gear Coins consumed—spending up to 10,000 will grant a significant 50% increase in total damage output. This makes early investments in Resource Conversion extremely valuable for high-damage builds. Furthermore, fully repaying your borrowed Gear Coins triggers a secondary Resonia effect that boosts Assist Follow-Up and Dodge Counter damage by 30%, providing an additional layer of offensive advantage for players who stay on top of their loan obligations.

Another layer of strategy comes with the Piggy Bank Crate Resonia effect, which provides cashback rebates. The amount of cashback scales with the level of debt repaid, incentivizing higher initial borrowing for greater long-term gain. Because of this, it is generally recommended to borrow the maximum amount available within each loan tier, especially in Basic stages, to fully capitalize on the cashback potential and enhance your Resonia Collection.

Movement and route planning are just as important as combat preparation. The map layout in Construction Ruins features rows or columns of tiles that disappear as you progress. Once you move forward, you cannot return to previous paths. Because of this, always decide on your route early—ideally targeting the right side of the map where more valuable tiles tend to be located. Prioritize paths along the top or bottom edge, as they often offer better event tile density, shorter distances between key objectives, and quicker access to Shops, Resonia Slots, and Gear Coin caches. Choosing the most efficient route not only conserves action points but also ensures you encounter optimal opportunities for Resonia growth and score improvement.

Construction Ruins Stage Strategy Tips

When tackling the Construction Ruins zone in Hollow Zero, building a well-optimized team around elemental advantages is essential for clearing stages efficiently and defeating bosses with minimal pressure. Among all available elements, Electric is the most effective due to the zone’s enemy composition. Many bosses and elite enemies in Construction Ruins have a natural weakness to Electric and Ether damage types, while Fire and Physical are often resisted, especially in earlier stages. Ice serves as a strong secondary choice, offering solid Anomaly potential and synergy with crowd control strategies.

For general progression, especially in the early stages like Frontline and Interior, an Electric-focused team offers the most consistent results. Anton, Zhu Yuan, and Harumasa shine as Electric DPS options, supported by characters like Anby or Qingyi for stun, and Nicole or Rina for utility and control. In the later areas such as Heartland and Core, Fire-based characters can also be utilized more effectively, as Fire-resistant mid-bosses begin to appear less frequently. This opens up room for Fire-based synergy depending on the team’s composition and available Resonia effects.

In terms of Resonia Collection, the Shock category should be prioritized for Electric teams, as it enhances both Electric-type damage and Anomaly efficiency, accelerating Overload triggers. For Ice teams, Freeze Resonia effects provide similar advantages by boosting Ice damage and increasing Anomaly build-up. The Energy Resonia set is another valuable choice, increasing Energy recovery and Decibel acquisition, while also improving skill-based damage across the team.

Crit-based Resonia boosts overall team performance with increased Critical Rate and Critical Damage, making it a flexible option for DPS-heavy lineups regardless of element. The Support category is ideal for compositions reliant on Assist Follow-Ups and Perfect Assists, offering bonuses like Energy restoration and temporary shields that improve survivability in tougher encounters.

Overall, prioritize Resonia Collection effects based on your core team’s elements—Shock for Electric, Freeze for Ice—while complementing your setup with Energy, Crit, or Support depending on your strategy and the specific needs of the stage.

Recommended Resonia (Specific)

In Construction Ruins, selecting the right Resonia is key to maximizing your team’s performance against increasingly challenging enemies and bosses. Given the elemental resistances and weaknesses present throughout this zone, Electric and Ether-type Resonia are especially effective. Most enemies, including mini-bosses and final bosses on each floor, exhibit a strong vulnerability to these attributes, making Electric and Ether Resonia a top priority for damage scaling. Investing in Shock-type Resonia boosts Electric DMG and enhances Anomaly efficiency, while Ether-based Resonia effects often provide broad damage amplification and utility, fitting well into hybrid or Ether-based builds.

In addition to elemental amplification, Dodge-oriented Resonia is highly recommended due to the attack patterns of bosses within this stage. Many bosses in Construction Ruins frequently utilize powerful attacks that are either difficult or outright impossible to parry, making dodging a more reliable defensive mechanic. Dodge-focused Resonia effects enhance counterattack opportunities following successful evasions, particularly boosting damage dealt through Dodge Counters and often improving survivability through shield or energy restoration.

Combining these types of Resonia—Electric, Ether, and Dodge—provides a solid foundation for both offense and defense. This setup ensures consistent damage output while capitalizing on the mechanics of Construction Ruins’ more unpredictable and aggressive enemy behavior, ultimately giving your squad the tools it needs to adapt and overcome each floor efficiently.

Construction Ruins Rewards

First Clear Rewards

Construction Ruins: Frontline

Construction Ruins: Interior

Construction Ruins: Heartland

Construction Ruins: Core

Regular Rewards

Construction Ruins: Frontline

Construction Ruins: Interior

Construction Ruins: Heartland

Construction Ruins: Core