Who's the Boss? IV
Who's the Boss? IV is a free-to-play achievement in the Combat category (Final Boss), worth 5 RuneScore points. It has no requirements.
In game: “Kill a total number of bosses. (X/3,000)”
5 RuneScoreCombatFinal BossFree-to-playHidden until done
Updated . From the RuneScape Wiki's achievement data (CC BY-NC-SA 3.0), checked 2026-10-09. Wiki page.
Requirements
None: any account can do this one as soon as it reaches the right place.