ZZZ Deadly Assault Guide — Scoring, Three Teams & Polychrome Cap | Zenless Zone Zero

Deadly Assault is ZZZ's second endgame mode. It unlocks at Inter-Knot Level 40, once Shiyu Defense is open and you finish its intro commission (talk at Scott Outpost).

The key difference: this is not a kill-the-enemy mode. You fight three bosses, three minutes each, and the bosses have effectively endless HP — you're not meant to kill them, you're meant to rack up points. That flips the goal entirely: instead of "how do I kill this fast", the question becomes "in these three minutes, how do I squeeze out the most score".

Score in Deadly Assault is not just raw damage. It blends the damage you deal with clean defensive play — Perfect Assists, Chain Attacks and similar counters all feed into it.

What that means for how you actually play:

• You can't play it safe. Hanging back and running out the three minutes is a recipe for a low score — points only climb while you're pressing the attack.
• Active defense pays. Parrying and dodging on rhythm then countering isn't just about survival, it directly adds score — so don't just circle-strafe away from attacks.
• Rotation beats raw stats. Within a fixed three minutes, what decides your score is how many Stun → burst cycles you force, not the ATK number on your character sheet.

Which is why the fundamentals — breaking Stun, Chain Attacks & Quick Assist, parry & perfect dodge — are worth practising more than pulling another new Agent.

Here's the real barrier in Deadly Assault: you fight three bosses, and each one needs its own team — no Agent may be reused. That's the opposite of Shiyu Defense, where you can reuse Agents freely.

So this mode doesn't measure your strongest Agent, it measures roster depth: you need roughly nine usable Agents split into three teams that each stand on their own. New players typically have one very strong team and nothing behind it — which is exactly why the mode gates itself behind Level 40.

How to prepare sensibly:

• Don't funnel everything into four Agents. Broad investment beats deep investment here, because a weak third team caps all your stars.
• Lean on the free Agents. Check the free character list — they're perfectly capable of anchoring your third team.
• Draft three team cores first, then farm. Cross-check the sample team compositions so you don't end up with three teams all fighting over the same support.

Deadly Assault pays out in stars: 3 bosses × 3 stars = 9 stars maximum. There's a twist in the payout that catches a lot of players out:

• The first six stars: each gives 50 Polychrome → a cap of 300 Polychrome per cycle.
• From the seventh star on: no more Polychrome — only Investigation Merits and Dennies.
• All nine stars: the full 720 Investigation Merits and 225,000 Dennies.

The takeaway if you're time-poor: if you're only here for gacha Polychrome, six stars is enough — the last three stars take substantially more effort and pay zero extra Polychrome. If you're short on Dennies for upgrades, though, those last three stars are still worth it, since 225,000 Dennies is real money. See the Polychrome farming guide for your other income sources.

The mode resets every two weeks, swapping both bosses and buffs — so each cycle is a fresh payout, and a cycle you skip is simply gone, with nothing carrying over.

Shiyu Defense first, almost always. The reasoning is practical:

• It unlocks earlier (Level 35 vs Level 40).
• It lets you reuse Agents, so two decent teams are enough — while Deadly Assault demands three teams with no overlap.
• Its Stable/Disputed Nodes hand out chunky one-time rewards, which is exactly what a newer account needs.

Once you have three teams that stand on their own, open Deadly Assault for another 300 Polychrome per cycle. The two modes update on alternating weeks, so playing both means you almost always have a reward milestone to aim at — these are the two best repeatable Polychrome sources for pulling on banners, so don't sleep through a reset.

If you'd rather play something more relaxed, read up on Hollow Zero (node-map exploration) and the weekly boss farming route so you don't waste Battery.