The official server’s original MOD, “ゾンビ拡張（WRT Zombie Addon）,” expands elite zombies at Feral tier and above into seven rank tiers you can tell apart by color. New intermediate ranks have been added between the existing “Radiated,” “Charged,” and “Infernal” tiers, so you can now see at a glance “how dangerous” a zombie is just from its color.
This page describes an original MOD on the official server. Numbers such as kill counts and rewards may change as the server is tuned.
The Seven Rank Tiers (weak → strong)
From weakest to strongest, the colors (ranks) line up like this.
- Ashen
- Blighted
- Radiated
- Virulent
- Charged
- Spectral
- Infernal
Display names follow the format “(rank name) · (zombie name)” (e.g., Ashen · Arlene, Charged · Cop, Infernal · Nurse). The higher the rank, the more health and experience the zombie has. Note that not every zombie gets all seven ranks — only the ranks that apply to a given zombie will appear.
Getting Hit Inflicts “Injuries”
Elite zombies aren’t just tough — when they land a hit on you, they inflict rank-appropriate injuries (abrasions, stun, sprains, lacerations, bleeding, and so on), day or night. The higher the rank, the more severe these tend to be. At night, a melee weapon appears in the zombie’s right hand as a visual effect, but that’s just for show — the injury effects are active both day and night. Head in with bandages and first aid kits on hand.
Kill Challenges (the “WRT” category on the Challenges screen)
In the “WRT” category on the Challenges screen, you’ll find 10 challenges for killing elite zombies (all shown from the start, with no prerequisites to clear).
| Challenge | Objective | Main Reward |
|---|---|---|
| Sweep: Ashen | Kill 30 Ashen | Experience |
| Contract: Blighted | Kill 25 Blighted | Blighted Mutant Boss Contract Ticket + WRT Token (Common) |
| Contract: Radiated | Kill 15 Radiated | Radiated Mutant Boss Contract Ticket + WRT Token (Uncommon) |
| Contract: Virulent | Kill 20 Virulent | Virulent Mutant Boss Contract Ticket + WRT Token (Rare) |
| Contract: Charged | Kill 15 Charged | Charged Mutant Boss Contract Ticket + WRT Token (Epic) |
| Contract: Spectral | Kill 15 Spectral | Spectral Mutant Boss Contract Ticket + WRT Token (Legendary) |
| Contract: Infernal | Kill 10 Infernal | Infernal Mutant Boss Contract Ticket + WRT Token (Heroic) |
| Grand Sweep: Seven Tiers | Kill 200 seven-tier zombies | Experience |
| Mutant Boss Hunt | Kill 7 mutant bosses | Experience |
| Three-Biome Patrol | Kill seven-tier zombies in the burnt forest, snow, and wasteland | Experience |
Completing the “Contract” challenges earns you the corresponding Mutant Boss Contract Ticket along with a difficulty-tiered WRT Token (coin).
Hunting Down Mutant Bosses
Mutant bosses don’t appear in normal spawns. When you read one of the contract tickets above from your inventory, a kill quest begins in the biome you’re currently in.
- Head to the rally point
- A defensive fight, holding off multiple waves of zombies
- Kill the boss that appears at the end
- Turn the contract in to a trader to complete it
Mutant bosses are larger than regular zombies, with boss-tier stats to match. They also carry the ranged vomit attack inherited from their original mutated form, so relying on melee alone is dangerous. On defeat, they have a dedicated drop slot (coins and the like).
Summary
- A zombie’s color = its danger level (Ashen → Blighted → Radiated → Virulent → Charged → Spectral → Infernal)
- Elite zombies inflict injuries when they hit you. Healing items are a must-have
- Collect boss contract tickets and coins through the kill challenges in the “WRT” category
- Read a ticket to start a mutant boss kill quest. Survive the waves and take down the boss