Obtaining the quest
Visit the Royal Rat-Catcher after completing the Gargantuan Rat quest.
- Message when quest is obtained: "I received word that a ratman patrol passed by here not long ago. Go hunt them down!"
- Journal entry: "Eliminate the Ratman Patrol."
Adventure in the Sewers until you find the ratman patrol event, choose "Begging for mercy, rodents? Die, sewer scum!" and defeat the 3 Ratmen.
300 gold and the Rat-Catcher Keepsake, opens up the Royal Rat-Catcher's next quest, Ratman Invasion.