The Hunter Knife is a weapon used by Hunters' melee attacks. Melee attacks by Hunters using this weapon take the form of an upward slashing motion that causes a large amount of damage. Additionally, the Super Ability Arc Blade encases it in electric blue energy, dealing heavy damage.
The Hunter Knife is "rugged, utilitarian, and quiet," enabling silent kills for Hunters.
Bungie Art Lead Tom Doyle stated that the idea for the Hunter Knife arose "from the desire to have special melee attacks for different Guardians." Because each Player Class has its own special melee attack, the Hunter Knife provides a unique feel for this class's melee attacks.
The actual knife itself is designed to resemble "equal parts kukri, trench, and buck knife," and reflects the Hunter's need for a knife that is "a hunting tool just as much as it is a weapon." It also shares the karambit's characteristic finger loop at the bottom.