halo 3 skull

Grunt Birthday Party Skull Effect: When you get a headshot on an enemy Grunt, they will explode into confetti, and you’ll hear children cheer, “Yay!” in excitement.

Grunt Birthday Party Skull Location:

This is one of the more fun Silver Skulls in Halo 3. The “Grunt Birthday Party Skull” is located on the second mission, “Crow’s Nest”, just before the area where you team up with the Arbiter (it’s the piping area where you see Drones buzzing in and out of an array of pipes). Just before you jump down the pipe to meet up with the Arbiter, stop at the ledge, and look directly below you. Along the wall that you drop down, there is a small ledge with a green arrow pointing backwards. Jump onto this ledge (rather than all the way down), and go inside this secret room. The skull is in the dead center of the room.