Brutality
From Halopedia, the Halo wiki
Brutality
Brutality is an achievement in Halo Infinite. It is unlocked by killing an enemy with melee using a bladed weapon (including the Mangler, Veporokk Workshop Ravager, Sicatt Workshop shock rifle, and the Skewer) in a matchmade game. This achievement awards the player 10 Gamerscore.