Halo: Spartan Assault Skulls
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
Dropped weapons have much less ammo. Adds +0.5 to XP multiplier.
The Spartan only has a shield. Adds +2 to XP multiplier.
Shields and armor deplete when firing a weapon. Adds +2 to XP multiplier.
Enemies are more challenging. Adds +1 to XP multiplier.