Skulltaker Halo: CE: Black Eye
Skulltaker Halo: CE: Black Eye is an achievement in Halo: The Master Chief Collection. It is awarded for finding and walking over the Black Eye skull in Halo: Combat Evolved Anniversary remastered mode on The Library. The achievement is worth 5 gamerpoints and can be unlocked on any difficulty.
The skull is in the back of one of the vents before entering the Index chamber for the first time. On the first floor at the beginning of the level, the player will notice squarish openings in the ceiling that the flood use to enter the level. Before entering the round, yellow room, find the vent closest to that door and perform a grenade jump into it. The skull is at the back of the vent.