Halo Wars 2 (Xbox One)

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All skulls

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 in the second part of the map. Once you capture the third power node, it will display icons on the map with the locations of the remaining power nodes. The skull's effect is killed grunts explode into confetti.

Paintball
In The "Ascension" mission, completely destroy the Banished base in the northern area of the map. The skull's effect is marine grenades and grunt mines explode with color.

Pain Train
In the "Ascension" mission, fly to the island in the southeast corner of the map and destroy the four hidden Aug. Extrators. Note: It cannot be accessed normally; send Hornets to destroy it. 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 captured prisoners (four prison squads) to die. It is recommended to play on the Easy difficulty to make completing this challenge much less difficult. Try keeping the prisoners in the back lines to better protect them. 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 conduit, destroy both Banished minibases on the west and east 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 any Spartan soldiers being killed. Simply retreat when their shields are low to prevent them from dying. 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, successfully complete the mission without losing a single barricade. It is recommended to play on the Easy difficulty to make completing this challenge less difficult. 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. It is recommended to play on the Easy difficulty to make completing this challenge much easier. 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. It is recommended to play on the Easy difficulty to make completing this challenge much easier. 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. It is recommended to play on the Easy difficulty to make completing this challenge much easier. 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 in the northeast corner of the map. Kill all the enemies and eventually it will become operational. 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, do not allow the Control Room shield to take more than 25 percent damage. It is recommended to play on the Easy difficulty to make completing this challenge much easier. 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 -- one is on the southeast edge of the map, and the other is on the southwest edge. The skull's effect is all infantry units start cloaked. The final score will also decrease.

Phoenix log locations

Search the indicated locations to find all 24 Phoenix logs. The Phoenix logs are text entries that are added to the "Campaign Logs" section. The logs reveal additional information about the events of Halo Wars 2 and its world.

1. The Healing Of Old Wounds I: In "The Signal" mission, it is found on the road leading to Lightbridge.

2. The Healing Of Old Wounds II: In "The Signal" mission, it is found on the road leading to Lightbridge.

3. The Healing Of Old Wounds III: In "The Signal" mission, it is found on the road leading to Lightbridge.

4. A New Bridge To Cross I: In "The Signal" mission, it is found on the road leading to Lightbridge.

5. A New Bridge To Cross II: In "The Signal" mission, it is found on the road near the Pelican crash site.

6. A New Bridge To Cross III: In "The Signal" mission, it is found on the road right next to the portal following the teleport from the upper platform.

7. Rise Of Atriox I: In the "A New Enemy" mission, it is found near the waterfall following the initial encounter at the Banished Camp.

8. The Graveyard: In the "A New Enemy" mission, it is found near the front of the main Banished base.

9. The Turn Of The Screw: In the "Ascension" mission, it is found around a metal walkway on the far east side of the map.

10. Rise Of Atriox II: In the "Ascension" mission, it is found on a side path shortly before you reach the Lightbridge.

11. Alice-130 Report #1: In the "One Three Zero" mission, it is found in the forest glade area you come across, between a couple of prison camps.

12. The Blinded: In "The Cartographer" mission, it is found behind the first conduit that you disable in the area on the far west side on the map.

13. The Telegony: In "The Cartographer" mission, it is found after destroying both Banished minibases on the west and east sides in the central chamber, before going to the top conduit.

14. A Split Heart Is Easily Conquered: In "Lights Out" mission, it is found after destroying the Covenant base near the last portal, in the far north of the map.

15. Rise Of Atriox III: In the "Lights Out" mission, it is found inside the prison camp in the center of the map.

16. A Warning: In the "From the Deep" mission, it is found near a stone arch in the center-east of the map, where there is only one group of marines.

17. Chrysalis: In the "Hold the Line" mission, it is found on a cliff overlooking the eastern entryway, near the enemy spawn point.

18. Rise Of Atriox IV: In the "Hold The Line" mission, it is found near the minibase in the far southwest area of the map, leading away from the Particle Cannon base.

19. A Small Sacrifice: In the "Under The Dark" mission, it is found near the first Brute Warlord in the far northeast area of the map. Proceed past the Kodiaks and turn right to find an area with a small opening that contains the log.

20. Rise Of Atriox V: In the "Under The Dark" mission, it is found near the red shield entrance after eliminating the third Brute Warlord.

21. Enduring Conviction Battle Reports: In "The Foundry" mission, it is found next to the Scarab Repair Pit in the northern area of the map.

22. The Snake That Eats The Tail: In "The Foundry" mission, it is found after destroying the minibase located below your base in the southern area of the map.

23. Rise Of Atriox VI: In "The Halo" mission, it is found at the very beginning of the mission, on the south side of the UNSC's main base, next to two power silos.

24. Beyond The Edge: In the "Last Stand" mission, it is found after eliminating the Brute Warlord on the southeast edge of the map.

Various Achievements

Complete the following achievements to unlock Microsoft Gamerscore points.

AchievementHow to unlockType
A history of decimationComplete A New Enemy10
A little bit extraComplete half of the Campaign bonus objectives10
A lot extraComplete all the Campaign bonus objectives20
A strong showing for the weekComplete a set of 3 Weekly Challenges in one week10
Alas, poor Yorick!Collect a Skull10
All or nothingPlay all cards in your deck at least once in a single Blitz match10
All travel is suspendedComplete Lights Out10
And the knockout punchComplete Under the Dark10
Ante-upComplete the Blitz tutorial10
Behind enemy linesComplete From the Deep10
Big SpenderSpend 100 Leader Points in Multiplayer or Skirmish30
Card sharkComplete 25 Blitz matches (Matchmaking only)20
Collecting a dreamCollect all the Skulls30
Comrades in armsEarn a gold medal on any mission (except Prologue) in Co-op on Legendary20
DominatedComplete Ascension10
DuellistWin your first Blitz match (Matchmaking only)10
Fifth floor: Tools, Guns, Super WeaponsComplete The Foundry10
FirefighterBeat wave 10 in Blitz Firefight10
First stepsComplete a Multiplayer match (Matchmaking only)10
FlyswatterDestroy 100 air units with anti-air units (Multiplayer, Skirmish or Blitz)20
Full houseComplete Blitz matches as each of the 6 launch leaders (Matchmaking only)10
Gold rushEarn a gold medal on any mission (except Prologue) on any difficulty20
Guerilla tacticsComplete One Three Zero10
It just keeps goingBeat wave 25 in Blitz Firefight30
JackpotPlay 777 total Blitz cards over any number of matches40
Know the ropesComplete the Advanced standalone tutorial10
Last stop, this townComplete Last Stand10
Learn the ropesComplete the Basic standalone tutorial10
Lone WolfComplete any mission (except The Signal) solo on Legendary with all skulls activated40
Long-term commitmentComplete at least 1 Weekly Challenge each week for a month30
Making the most of the dayComplete 3 Daily Challenges in one day10
Meat grinderKill 100 infantry with anti-infantry units (Multiplayer, Skirmish or Blitz)20
Morbid curiositiesCollect half of the Skulls20
Natural intelligencePlay a Skirmish match alone against only AI opponents (1 or more)10
On fireScore 500,000 points in a single Blitz Firefight20
OverkillDestroy 500 units with Leader Powers (Multiplayer, Skirmish or Blitz)30
Paint it redAchieve the highest possible kill-streak in any Blitz mode10
Palmer's Pure GoldEarn a gold medal on every mission (except Prologue) on any difficulty30
Sentinel size mattersComplete The Halo10
Short-term commitmentComplete at least 1 Daily Challenge each day for a week20
Space HealerCast 100 Healing Leader Powers (Multiplayer, Skirmish or Blitz)30
Spare changeSpend 5 Leader Points in Multiplayer or Skirmish10
Stacked the chipsGather 150 Energy Crates over any number of Blitz matches10
Stirring the potComplete The Cartographer10
Surviving the long warComplete the Campaign on Legendary60
The hand that feedsKill a unit owned by a developer or someone who has this achievement20
The hard fightComplete the Campaign on Heroic40
The rank and fileRecruit or construct 1 of each UNSC unit in Multiplayer or Skirmish (Launch units only)10
The Scrappy SixComplete a Multiplayer match as each of the 6 launch leaders (Matchmaking only)20
The setup...Complete Hold the Line10
The tribeRecruit or construct 1 of each Banished unit in Multiplayer or Skirmish (Launch units only)10
This war is overComplete the Campaign30
Trash compactorDestroy 100 vehicles with anti-vehicle units (Multiplayer, Skirmish or Blitz)20
Two heads are better than noneWin a Skirmish match with a friend against only AI opponents (2 or more)10
Two heads are better than oneComplete a mission in co-op10
Wake upComplete The Signal10
You've got a case of the BirleyIn a 1v1 Skirmish against Legendary AI, recycle your base in the first 5 minutes and then win20