This article is about the gameplay modifiers in Halo: Spartan Assault. For other uses, see Skull.
Halo: Spartan Assault skulls are game modifiers featured in Halo: Spartan Assault with the appearance of a human skull. Unlike previous Halo titles, Spartan Assault skulls do not increase the player's in-game score. Instead, they multiply the amount of XP the player is awarded upon completing a level.
List of skulls
Black Eye
Shields only recharge from melee attacking enemies.[1] Adds +1.5 to XP multiplier.
Blind
Vital HUD elements are hidden.[2] Adds +1 to XP multiplier.
Famine
Dropped weapons have much less ammo. Adds +0.5 to XP multiplier.
Hollow
The Spartan only has a shield. Adds +2 to XP multiplier.
Pacifist
Shields and armor deplete when firing a weapon.[2] Adds +2 to XP multiplier.
Thunderstorm
Enemies are more challenging.[2] Adds +1 to XP multiplier.