That's a Knife
From Halopedia, the Halo wiki
Template:New Content That's A Knife is an achievement in Halo: Reach.[1]
It is unknown how the achievement is unlocked, but it seems as though an assassination triggers the unlock.
Sources
From Halopedia, the Halo wiki
Template:New Content That's A Knife is an achievement in Halo: Reach.[1]
It is unknown how the achievement is unlocked, but it seems as though an assassination triggers the unlock.