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HUD and first person arms and weapon are hidden.
Just like Halo2, no HUD at all.
Level:Sierra 117
Location:After fighting the first set of enemies, walk downstream while hugging the right wall and eventually you will come to the edge of the cliff. There will be a bit of land jutting out below you with the skull on it.
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Co-op reverts to previous checkpoint on player death. Solo restarts mission.
Self-explanitory.You also lose 75 points when you die instead of 25.
Level:Sierra 117
Location:After Freeing Johnson and killing all the Covenant that come in the phantoms, walk to the Pelican that comes to pick you up. Face the cargo bay but instead of hoping in, turn left and follow the path. Once you hit the wall jump up to your right, eventually reaching a walkway. Walk all the way to the end, take a left, then a right, then at the end of this little bit to the right is a dark corner. Turn your light on and you should see the skull. If you cant see it you're probably standing on it.
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Bash your way to better health.
Every melee hit to anyone increases your health.
Level:Crow's Nest
Location:From the start without moving anything you can see a massive pipe above you. Walk up the stairs then up the next set, turn to your left and jump up on the shelf unit. From there jump to the red cross beam then up onto the pipe, from there just walk to the end and walk over the Black Eye skull to claim it. You don't have to pick this one up it does it automatically.
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Grunts explode like pinatas if they are killed with a headshot.
When you headshot a grunt, they explode like a pinata with confetti.
Level:Crow's Nest
Location:Play through the level normally, The second time Cortana interrupts you saying "You Have been called upon to serve" you are in the right place, So walk to the end of this path but don't jump off the end, Instead look down and you can see a green arrow, try land on that ledge then turn around to see the skull.
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Enemies always make every saving throw, always berserk, always dive, never flee...
Enemies never go out easy to the looks of it...
Level:Tsavo Highway
Location:After you have to deactivate a shield that's blocking the road, you will exit onto a bridge and a giant covenant ship flies overhead. You need to get out of your jeep if you are in one and go to the right side of the bridge, then go underneath and you will see bridge supports jutting out into the canyon. Jump onto the one farthest to the left and go to the edge and turn left and you'll see a small jut out of the cliff with the skull on it.
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Enemies are grenade happy.
All enemies will have 2 grenades
Level:The Storm
Location:You will come to an area with 2 Wraiths. Don't destroy both of the wraiths. Kill everything BUT leave at least one wraith alone. Then jump on the structure and get it.
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You do not have a motion sensor.
As it says, you will no longer have a radar through campaign if you pick this up.
Level:Floodgate
Location:It's in the first area before you drop down and get a message from Cortana. There is a flood form that jumps over you onto a building. Shoot it while it's still up there and when it dies the skull should appear right next to you.
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Weapons drop 50% less ammo.
Like it says, every weapon dropped will have half the ammo.
Level:The Ark
Location:Play through the level as normal and once you pass the exploded phantom hang a right after the drop, drive over to the rocky wall in front of the third pillar, Jump up the rock face and jump onto the structure using the right side, Walk to last pillar (closest to where you entered the area, and look at it you should see the skull, To get it you might need help from another player, stand on there head chuck a normal grenade right down and then jump towards the skull, You will probably miss this jump about 5 times but you will eventually get it.
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Major upgrade to all enemies.
All Enemies are at their highest rank.
Level:The Covenant
Location:After you shut down tower 1 and get access to the hornet, fly to tower 2 (the one the arbiter shut down). While walking up the stairs, go to the middle part that connects both and there should be a stair leading up to a platform where the skull is.
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You'll hear things you never knew existed.
Just like in Halo2, this skull unlocks new dialogue throughout the entire game.
Level:The Covenant
Location:After defeating the Scarabs, and going inside, get to the location with all 7 Ring Holograms. Kill Truth first, then jump through the rings. You must jump through the rings in a specific order. That order is as follows(1 at entrance, 7 at prophet):
1 3 4 6 7 5 4 6 5 4 5 3 4
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Damage is modified.
Resistances are increased. If plasma was weak against a type of armor, it now has virtually no effect, and so on.
Level:Cortana
Location:When in the circular type room with all the flood look for a small structure piece next to two archways, jump on top if it and up on the rocks to the top left, turn left and jump up again, then do a 180 and jump to the rocks across from you. After that follow the the rock sticking out and leading up on top of of the original circular room, the skull will be in a pile of blood.
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Double enemy health.
In Halo2, people thought it was a difficulty higher than Legendary when picked up. So now every enemy you face will have 2x health than before.
Level:Halo
Location:Follow the normal path till you reach a cave, then hug the right wall until it branches off into a small path, at the end of this path is some rubble and in front is the skull.
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Acceleration scale from explosions is increased.
Same effect as Sputnik in Halo2. Explosions will have A LOT more power.
Level:The Ark
Location:First pick up a grav lift from the small building near where you fight the Scarab. Now proceed through the level until you reach the second sloping hallway (stairway), you should see some partitioned risers (platforms) halfway down. The skull is on the top level. Toss the grav lift on the right side of the hall so it lands on the fourth little green dot from the door. Then run, jump, and use the grav-lift to propel you to the top. You should reach a checkpoint just as you enter the room so it you miss just try again.
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All Gold Skulls have a meta-game multiplier and achievement once picked up.
All Silver Skulls have no meta-game multiplier and no achievement once picked up. They are strictly for enjoyment and don't affect game play.
Please post any info you have about IWHBYD.