Legend Slayer

Legend Slayer is an achievement in Halo: The Master Chief Collection. It is unlocked by killing an enemy player that has the Legendary Anniversary achievement in Halo 2: Anniversary multiplayer. The achievement is worth 10 Gamerscore and can be unlocked in both matchmaking and custom games.

Trivia
This achievement is identical to the Hired Gun achievement in Halo 2 for Windows Vista.