Skulltaker Halo: CE: Iron
From Halopedia, the Halo wiki
Skulltaker Halo: CE: Iron
Skulltaker Halo: CE: Iron is an achievement in Halo: The Master Chief Collection. It is awarded for activating the Iron skull in Halo: Combat Evolved Anniversary on The Pillar of Autumn. The achievement is worth 5 gamerpoints and can be unlocked on any difficulty.
Location
Iron Skull location video here.