Halo Wars 2: How to Unlock All Skulls Guide
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Successfully complete the indicated task (optional objective) in the listed mission to unlock the corresponding skull:
Grunt Birthday Party In the “A New Enemy” mission, capture all four of Decimus’ power nodes. The skull’s effect is killed grunts explode into confetti.
Paintball: In the “Ascension” mission, fly to the island south of your base and destroy the hidden facility’s four structures. The skull’s effect is marine grenades and grunt mines explode with color.
Pain Train: In The “Ascension” mission, destroy the Banished base at the top of the map. The skull’s effect is all player units train 50 percent faster. The final score will also decrease.
Bountiful Harvest: In the “One Three Zero” mission, do not allow any of the four prison squads to die. The skull’s effect is supplies from supply pads arrives 25 percent faster. The final score will also decrease.
Emperor: In “The Cartographer” mission, before going to the top chamber, destroy both mini-bases on the sides in the central chamber. The skull’s effect is all player powers recharge in half the time. The final score will also decrease.
Pestilence: In the “Lights Out” mission, rescue all ten squads of UNSC prisoners. The first prisoner is found to the right at the beginning of the mission. The other prisoners can be found slightly to the right of the center of the map. The skull’s effect is all player units slowly lose health from the moment they are built. The final score will also increase.
Total Annihilation: In the “From The Deep” mission, successfully complete the mission without the Spartan being downed. The skull’s effect is the Spartan “Slams” special ability creates a more powerful explosion upon landing. The final score will also decrease.
Sickness: In the “Hold The Line” mission, do not destroy any barricades. The skull’s effect is all player units have 50 percent fewer hit points. The final score will also increase.
Firestarter: In the “Hold The Line” mission, have the Particle Cannon stay above 50 percent health. The skull’s effect is grunts and marines explode upon death, inflicting damage on enemy units. The final score will also decrease.
Things That Make You Go Boom: In the “Under The Dark” mission, defeat all three Brute Warlords. The skull’s effect is hero units release a nuclear explosion upon death. The final score will also decrease.
Wuv Woo: In “The Foundry” mission, have the Scarab survive the mission. The skull’s effect is Scarab and Locust beam weapons shoot rainbows.
Sugar Cookies: In “The Foundry” mission, have the Scarab stay above 25 percent health. The skull’s effect is all player units have 50 percent more hit points. The final score will also decrease.
After Party: In “The Halo” mission, defend Bravo base. The skull’s effect is any time a Firebase is destroyed, the player who owned it gets a tank and infantry unit. The final score will also decrease.
Nightmare: In the “Last Stand” mission, have the Control Room Shield take less than 25 percent damage. The skull’s effect is no checkpoints or saves allowed on any difficulty in the campaign only. The final score will also increase.
Shadow: In the “Last Stand” mission, defeat both Brute Warlords and their reinforcements on each side of the map. The skull’s effect is all infantry units start cloaked. The final score will also decrease.