Assembly Skull (achievement)

Assembly Skull is an achievement in Halo 3 and Halo: The Master Chief Collection. It is unlocked by finding the hidden skull on the map Assembly.

The achievement is worth 25 Gamerscore in the original game and 5 Gamerscore in The Master Chief Collection.

Location
To find the skull, the player must go to Forge mode. There are two supports structured into the top center of the map, and one of them has the skull needed for the achievement.

External

 * Tutorial Video on Getting All Mythic Skulls