Headhunter
From Halopedia, the Halo wiki
Headhunter
Headhunter is an achievement in Halo: Combat Evolved Anniversary. It is awarded for claiming all campaign skulls.[1] It is represented by three human skulls over a gold five-pointed star.
The achievement is worth 50 Gamerpoints.
Trivia
The name of the achievement is a reference to the Halo: Reach multiplayer game variant Headhunter.
Sources