Here’s Where To Find Every Skull in Halo: Combat Evolved for The Master Chief Collection

The Pillar Of Autumn (Skulltaker Halo: CE: Iron Achievement)

After Chief gets his vitals checked, leave the cryo-tube and immediately head to the right. Towards the back of the room there will be two blue and grey cylinders right next to one another. Look behind these two blue cylinders and voila! Your first skull out of the way, nabbing you 5 gamerscore.