There are a total of 15 skulls available in Halo 2. The following skull can be found in the video below, and is only attainable on
Legendary difficulty. It is ok to use the
Scarab &
Envy skulls in order to do this. The timestamp for its exact location can be found directly underneath.
** Sputnik Skull Required **[
12:29] - Skull: Ghost - Mission: Uprising