Zenless Zone Zero City Fund Event: All Rewards, Plans & Prep

Breakdown of Zenless Zone Zero’s City Fund event: how to unlock, timelines, exclusive rewards, and optimal tips for all player types.

A Strategic Opportunity in Version 2.7—How to Maximize Every City Fund Level

The New Eridu City Fund event returns in Zenless Zone Zero Version 2.7, and its impact on progression is immediate. With its multi-tier reward structure, limited-time exclusives, and flexible material selection, this event is central for both veteran Proxies and newcomers aiming to accelerate their account growth ahead of the next major banners. If you're debating when to log in or where to invest your Polychrome, understanding this system is priority one.

While the New Eridu City Fund operates much like seasonal battle passes seen in other Hoyoverse titles, its approach to "pick-your-own" rewards is attracting significant discussion within the community. The blend of cosmetic unlocks, essential upgrade items, and generous Polychrome allocations sets a new baseline for patch-long engagement, especially as power creep accelerates and resource optimization becomes increasingly important for high-level clearing.

At a Glance: Event Highlights

Event Duration: After Version 2.7 release to 2026-05-04 03:59 (server time)
Purchasing Period: Closes 2026-05-04 02:59 (server time)
Plans Available: Basic (Free), Growth (Paid), Premium (Paid Upgrade)
Key Rewards: Up to 888 Polychrome, exclusive avatar and namecard, W-Engine Microcontroller Units, Resonating Cores, Ether Batteries, menu decorations, Hamster Cage Pass
Eligibility: Unlock Combat Simulation in Main Story Chapter 1 "Cat's Lost & Found"

City Fund Plans, Breakdown & Timeline

Plan Type	Cost	Core Rewards	Instant Unlock Bonuses
Basic (Free)	0	Expansion Task rewards, upgrade materials	None
Growth Plan	Paid	+680 Polychrome, exclusive avatar	Yes
Premium Plan	Upgrade	+208 Polychrome, menu decos, more W-Engine Units	Yes (after upgrading from Growth)

Note: Once you unlock the Growth Plan, you can upgrade to Premium anytime within the purchasing window.

Rewards Overview: What’s on Offer?

Raising your City Fund Level yields a sliding scale of rewards, with major milestones unlocking permanent and time-limited content. Key prizes include:

Polychrome (total up to 888 across both paid plans): core currency for character banners and pulls
Exclusive Avatar — "Perfect Expression Control": only available this cycle via Growth Plan
Namecard — "Isle of Gentle Dreams": unlockable by progressing through the paid tier
Hamster Cage Pass: unique consumable, function detailed in-game
W-Engine Microcontroller Units: vital for high-value gear upgrades
Resonating Cores/Ether Batteries: select the specific upgrade materials you need most
Menu Decoration Set: cosmetic upgrade exclusive to Premium Plan holders
Great Builder’s Certificate: high-level certificate awarded at Lv. 30; must be claimed and used within event term

Eligibility & Unlock Conditions

To access the City Fund event, you must first unlock Combat Simulation in Main Story Chapter 1, "Cat’s Lost & Found." This means most active players will already be eligible, but absolute newcomers should prioritize main story progress to maximize event value.

City Fund Leveling: Optimal Approach for All Budgets

The City Fund’s scaling reward model accommodates free-to-play, low spenders, and completionist whales alike:

F2P: The Basic Plan yields valuable upgrade materials and experience with no purchase required. Complete all daily/weeklies to maximize passive returns.
Growth Plan: Priced affordably, it frontloads Polychrome and delivers a seasonal avatar—making it a strong value even for minimal spenders.
Premium Plan: Adds a further Polychrome injection, unique cosmetics, and additional upgrade materials. Best reserved for those who will hit Level 30 (and thus claim the Great Builder’s Certificate).

Key guidance:

Only purchase within the official period (ends 2026-05-04 02:59 server time).
Afterward, you retain access to unfinished tasks/rewards but can't upgrade or buy more plans.
Unclaimed time-limited rewards (notably the builder certificate) will expire at event close—set reminders to use them promptly.

Expansion Tasks: What to Expect

While task specifics are not disclosed in current official materials, prior iterations suggest:

Mix of daily, weekly, and event-long objectives (combat, exploration, enhancement)
Each task awards event XP for City Fund leveling
No notable paywalls—progress gated by routine engagement, not currency spend

Players should anticipate steady, attainable targets for full plan completion.

Day-1 Priorities & Preparation Checklist

Complete Main Story Chapter 1 to unlock Combat Simulation (if not already done).
Review Expansion Tasks as soon as event launches; optimize routing for overlapping objectives.
Plan Materials: Assess which upgrade resources (Cores, Batteries) your primary squad needs and claim those over generic rewards.
Set Calendar Alerts for Premium Plan purchasing and Great Builder’s Certificate claim deadlines.
Save Polychrome: Decide if City Fund Polychrome will fuel current rates or be banked for upcoming banners.

Worth Buying? F2P & Low-Spend Perspective

For entirely free-to-play players, the Basic Plan still awards meaningful upgrade materials and incremental progress. The Growth Plan is a strong value proposition, especially due to the instant currency and limited avatar. The Premium Plan only delivers extra value if you’re comfortable reaching at least Lv. 30—otherwise, consider skipping.

With the increasing price pressure of new banners and limited-time cosmetics, every Polychrome counts. Those undecided should reference our Zenless Zone Zero currency management guide for optimal event budgeting.

Industry Trends: Seasonal Passes in Gacha, Community Take

The popularity of seasonal fund/battle pass models continues to escalate in the gacha genre, not just for monetization, but as tools for sustained engagement. Zenless Zone Zero’s embrace of customizable material rewards and exclusive badges aligns closely with industry frontrunners. Early Proxy feedback signals strong approval for the flexibility of the reward pool, although concerns persist regarding time pressure for busy players.

Unconfirmed — Subject to Change

No rumors or leaks concerning changes to City Fund structure, rates, or new rewards for this patch. All features referenced are from official notices.

Visual Aids & Accessibility

Suggested visuals:
– Table displaying plan differences (as above)
– Screenshots of event UI and unique rewards (e.g., avatar, namecard), with alt text: In-game City Fund menu showing progress, exclusive cosmetic previews for accessibility
– Provide alt tags on images for inclusivity

Official event promo art (source: in-game): Crowded New Eridu streetscape, City Fund menu overlay, showing available and exclusive rewards for Proxies.

Conclusion: Execute Early, Plan Ahead

Whether you’re optimizing for meta progression, eyeing the next banner, or simply want to complete your cosmetic sets, the New Eridu City Fund in ZZZ Version 2.7 offers value at every spending level—with extra weight on timely engagement and resource planning. For full benefit, prioritize your unlock path now, and don’t let time-limited rewards slip by. As always, find ongoing strategy updates, banner breakdowns, and currency guides on EarlyGG.

For a full breakdown of banner rates and upcoming character speculation, consult our Zenless Zone Zero Banner Tracker.