Rat King build guide

SN|P3R : Rat-a-Tat ( Rat King Gun )

by SN|P3RVersion 36Updated Oct 9, 2026Guide #836523

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Observed usage

Match statistics · filters applied except game mode

Published guide

As written by the author · latest version · not affected by filters

In-game favourites: 12,512 (as last synced by the API; not match usage)

Author's notes

→ Featured in Top Daily Builds for 11 heroes: Haze, Infernus, Wraith, Mirage, Grey Talon, Doorman, Victor, Mina, Rem, Apollo & Yamato! → Heavily Work in Progress Build & will evolve over time

Item categories

11. Early Game
Author's category · 9 items · L-R || We Build Gun + Mobility first & then Pivot to 5000 HP Juggernaut || Sell Monster Rounds Later
1. 1
  Monster Rounds
  Sell this item, once slotlocked
2. 2
  High-Velocity Rounds
3. 3
  Opening Rounds
  Built from High-Velocity Rounds
4. 4
  Extra Health
2Early gameoptional
Game stage · 2 items
1. 1
  Extra Regen
2. 2
  Cultist Sacrifice
  Built from Monster Rounds
32. CORE
Author's category · 9 items · Ballistic + Berserker → ⇧DMG Stacks || Plated & Spirit Resilience ⇄ Spellslinger / Witchmail / Colossus
1. 1
  Ballistic Enchantment
  Ballistic can be put on Grenade or Rats. Grenade has buffed in the latest patch and ideally keep it on his 1 now. Feel free to keep on 2, if you prefer Rats like the earlier iteration
2. 2
  Berserker
  Ballistic + Berserker in Fights/Rift/Midboss → ⇧Weapon DMG Stacks
3. 3
  Superior Cooldown
4Mid Game Spiritoptional
Author's category · 2 items
1. 1
  Superior Duration
2. 2
  Greater Expansion
53. End Game Items
Author's category · 6 items · NOT L-R, Your Choices
1. 1
  Witchmail
2. 2
  Colossus
  Built from Extra Health
3. 3
  Frenzy
4. 4
66400 Greensoptional
Author's category · 3 items
1. 1
  Spellbreaker
2. 2
  Indomitable
3. 3
  Cheat Death
76400 Barriersoptional
Author's category · 2 items
1. 1
  Divine Barrier
2. 2
  Diviner's Kevlar
8Gun Optionsoptional
Author's category · 6 items
1. 1
  Armor Piercer
  Built from High-Velocity Rounds
2. 2
  Ricochet
3. 3
  Silencer
4. 4
9Anti Gun Optionsoptional
Author's category · 3 items
1. 1
  Bullet Resilience
2. 2
  Metal Skin
3. 3
  Return Fire
10Green Optionsoptional
Author's category · 2 items
1. 1
  Counterspell
2. 2
  Dispel Magic

Categories appear in the author's order. Only the editor's default Early, Mid and Late sections are marked as game stages; the author's own categories keep their names. “Built from” links come from the game's item recipes.

Published ability order

Published ability order: unlocks and upgrades in the author's order, one row per ability in slot order
Scrap GrenadeScrap Grenade	Scrap Grenade: Ability unlocked, step 1	Scrap Grenade: 1 AP upgrade, step 2				Scrap Grenade: 2 AP upgrade, step 6