Like previous Halo titles, unlockable skulls in Halo: Campaign Evoled will allow you crank up explosions, turn down gravity, or celebrate every grunt headshot with confetti and fanfare. You can even mimic the gameplay of the classic Halo: Combat Evolved, or enable remixes of skulls for randomized choas. [Media: https://www.youtube.com/watch?v=6sUil_Tj_OQ]