Zenless Zone Zero: How to Get Free S-Rank and A-Rank W-Engines

To acquire high-tier W-Engines in Zenless Zone Zero without spending Polychromes on weapon banners, craft A-Rank gear at Box Galaxy using recycled chips and purchase standard S-Rank W-Engines directly from the Signal Shop. This exchange route lets you fully equip your damage dealers and stun units while reserving all limited gacha pulls for new Agents.

Crafting A-Rank W-Engines at Box Galaxy

Box Galaxy, run by Elfy on Sixth Street, allows you to purchase A-Rank W-Engines without relying on gacha RNG. The shop trades exclusively in Original Transcriptor chips, which you acquire by running Routine Cleanup challenges and dismantling surplus W-Engines.

Before dismantling spare engines for chips, ensure you have locked at least one copy at maximum five-star refinement for your active roster. Once your operational copies are secure, dismantle surplus B-Rank engines earned from free Master Tapes and standard pulls to fund your target crafts.

Target the engine that matches your primary carry's damage activation trigger, then purchase duplicate copies from Elfy over time to reach maximum refinement rank.

Purchasing Standard S-Rank W-Engines in the Signal Shop

The 24/7 Store's Signal Shop offers a non-random method to acquire standard S-Rank W-Engines for 600 Residual Signals. You accumulate Residual Signal passively whenever you roll duplicate A-Rank or S-Rank equipment and Agents on standard or limited banners.

Free-to-play accounts often convert Residual Signal into Encrypted Master Tapes, but 600 Residual Signals only convert to 30 banner pulls. Because 30 pulls sit well below soft pity on equipment banners, buying an engine directly from the Signal Shop eliminates banner risk by guaranteeing a specific top-tier weapon.

Prioritize these options depending on your roster's needs:

• The Brimstone (Attack): Stacks percentage-based ATK on hit, serving as a reliable universal option for primary Attack agents.
• Hellfire Gears (Stun): Boosts Impact and off-field Energy generation, increasing Daze accumulation for Stun units.
• The Restrained (Stun): Accelerates Daze build-up against target enemies, shortening the time needed to trigger stun burst phases.
• Weeping Cradle (Support): Provides PEN Ratio and increases overall team damage after your agent executes an EX Special Attack.

Sustaining Resources Through Scott Outpost and Daily Errands

Reaching 400 daily engagement points in your Inter-Knot Errands provides the baseline Dennies, Polychromes, and routine materials required to maintain regular character growth. The duplicate pulls earned from regular milestone Master Tapes feed your Residual Signal reserves over time.

To level and promote the engines you buy from Box Galaxy and the Signal Shop:

1. Clear Hollow Zero weekly: Complete exploration stages before the Monday reset to earn Association Credits and Investigation Merits.
2. Trade with Casper: Visit Casper at Scott Outpost to convert Association Credits into core developmental materials and master currencies.
3. Farm Routine Cleanup: Spend your routine battery charge on specific Routine Cleanup stages to obtain the component chips required for Box Galaxy crafts and weapon ascension.