User:Onyx Fire/Halo 4 Skulls (Onyx Fire)

Halo 4 Skulls are human skulls hidden in Halo 4's Campaign. Once the Skull has been found, an achievement is earned and the skull is unlocked to be played on any level. Once all 12 skulls are unlocked, LASO can be played. Secondary skulls can be used at any time and do not need to be unlocked.