The Piņata Skull is located on the level Two Betrayals. The chapter title "Final Run" will appear as you exit a tunnel from the underground (the area with the broken bridge) and Cortana will mark Pulse Generator #3 with a navigation point. The skull is located above the tunnel (where a Wraith was located on Assault on the Control Room). I recommend grenades or a Banshee to get up there; however, careful jumping will get you to the top on the left side (as you exit the tunnel). You need to have the updated graphics enabled.
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|Piņata Skull||On Two Betrayals above the exit tunnel from the underground bridge on the chapter "Final Run".|