Halo: Combat Evolved Anniversary

All you have to do is work your way through this fantastic list:

SKULLS

Iron
Level: Pillar of Autumn
Location: Located behind a cryo tube at the beginning of the level.
Effect: Upon dying, resets the level in single player and reverts to the last checkpoint in Co-op.
Description: At the moment I'm unsure of what cryo tube this skull is behind, but it's hard to miss. Just check all of them. I'll update this segment when I have a definitive location.

Mythic
Level - Halo
Location: Beneath the waterfall at the beginning of the level.
Effect: All enemy health doubles. All enemy sentinels have energy shields.
Description: Immediately after stepping out of the crashed drop ship, immediately turn right and head for the enormous waterfall. It will be there underneat the water. Fancy a swim

BOOM
Level - Halo
Location: Just before entering the underground tunnel.
Effect: All explosives double in blast radius.
Description: After having the warthog dropped off, proceed like normal, but instead of going down into the trench, go around the cliff edge on the right side and it should show up after a moment.

Foreign
Level - Truth & Reconciliation
Location: Behind the door that the 3rd set of hunters emerge from in the hangar bay.
Effect: Cannot pick up alien weaponry (covenant vehicles are currently unknown, but are presumed to be excluded due to Two Betrayals use of a Banshee.)
Description: When you enter the large hangar bay (the room with the large shielded openings that the Pelican uses to drop off marines) kill all of the enemies, but ensure you're close to the far right-side of the room when you finish them off. When the music suddenly picks up, be ready to go through the doors that open. Without an enemy near them, they won't open again. The skulls will be just inside.

Famine
Level - Silent Cartographer
Location: The top of the small plateau on the Beach
Effect: All weapons picked up will only have half a clip of ammo.
Description: From the start of the level, after exiting the Pelican immediately turn around and begin walking the other direction. You'll eventually come to a part of the island with a large piece of land right in the middle of it with a ramp going up the side. Scale it and the skull will be waiting at the top (Likewise, if you wait until after you activate the security console, the plateau will be immediately ahead of you as you exit the building. A scarab will now be crashed beside it.)

Bandanna
Level - Silent Cartographer
Location: At the end of the tunnel on the ceiling in the Security console building (Warning: Grenade jump necessary.)
Effect: Grants the player Infinite ammo in all weapons.
Description: Go into security building and head down the tunnel that leads to the control console. Go into the open room, than grenade jump on top of the structure to find this skull.

Fog
Level - Assault on the Control Room
Location: In the center of the room immediately before you set foot into the canyon. (Warning: Grenade jump necessary.)
Effect: Disables all players radars.
Description: After crossing the first bridge and taking the elevator down to the ground floor, the skull will be on a raised platform in the center of this room and will be surrounded by fog. It will require a grenade jump to reach it

Malfunction
Level - Assault on the Control Room
Location: On one of the pipes sticking out of the giant gorge in the large underground room.
Effect: Randomly disables one of the player's HUD features
Description: When you enter the tunnel and you come to the large room, you will notice pipes that stick out of the gorge in the middle on both sides. Not 100% certain which pipe the skull is on yet, but there aren't many to pick from. Will update this segment as more definitive information is made available.

Recession
Level - 343 Guilty Spark
Location: Located to the left of the Facility in a little drop behind a shade turret.
Effect: Every bullet fired costs 2 rounds in a clip.
Description: When you cross the fallen tree, you'll see a shade turret blow up and assault rifle fire coming from the structure. Instead of going inside, immediately go to the left and keep against the back wall. you'll come to a turet with a small drop behind it. Slide down the drop carefully and the skull will be waiting for you at the bottom

Black Eye
Level - The Library -
Location: In the back of one of the vents before entering the Index chamber for the first time. (Warning: Grenade jump necessary.)
Effect: Shields don't recharge on their own. Using melee on an enemy will recharge them.
Description: On the first floor at the beginning of the level, you will notice squarish openings in the ceiling that the flood use to enter the level. Before entering the round, yellow room, find the vent closest to that door and do a grenade jump into it. The skull will be waiting for you.

Eye Patch
Level - The Library:
Location: Behind the Index on the final platform.
Effect: Disables Auto-Aim.
Description: Instead of running onto the platform to grab the Index, instead go around as far from the Index as you can. The skull will be waiting on the ground right behind it.

Pinata
Level: Two Betrayals
Location: On the snowy ledge directly above the exit to the underground tunnel.
Effect: Meleeing an enemy makes them drop grenades.
Description: In AotCR, there will be a wraith tank on it as you're entering the tunnel. This time, get to the end of the level and grab the banshee, than fly back and land up there to grab your skull.

Grunt Birthday Party
Level: The Maw
Location: On a railing near where Foehammer is shot down.
Effect: Headshots cause grunts to explode into a shower of confetti!

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Credit goes to Jason Burt on Planet360 for the text.
And also wanna thank Charlie from VGMMDI for messaging me with his YouTube clip

The first skull available (Iron skull) is located a few minutes after you start the first mission 'Pillar of Autumn' once the Chief has awoke and exited the cryo-tube head to the back of the room and the skull is located behind the large cylinders.
Just walk over it to collect.

Please note skulls only appear in the game whilst playing in the remastered view, skulls do not appear in classic view. Thanks Drabik for the info.

Here's a video to show you.

All collectibles in order as they are found

13 skulls and 10 terminals

Easy to follow guide.. Hopefully.... Any questions message me here or on youtube and il do my best to try and help

The first skull i found in the campaign was on the second level "Halo". As soon as you have the cutscene finished step out of the safety pod and run along the right side of the map until you see a huge waterfall. The mythic skull is lying behind one of the rocks there.
Hope this helps:)

On the first level, got out if the Cryo tube and turn right. Walk 3 paces forward and look right. You should see 2 cylinders beside each other.One with a red stripe, one with a blue. Go behind these and there is a skull, walk over it (bleep bloop).

Let me know what you liked and disliked ( gave a negitive vote for (thumbs down)) so I can make all of my solutions better!

The first Skull is located in the bay where the Master Chief is woken. It's behind one of the other cryo tubes against the wall. You must get it before you follow the deckhand, as you wont get chance to go back to get it.

Need help with this Achievement?

Then don't worry, WarzoneAchievements offers you a detailed Video Guide on how to get All the Skulls in the Campaign! The guide includes the "Looks like the Oddball", "Skulls Taken", and "Headhunter" Achievement's.

*We recommend that you watch the actual video Guide on Youtube, and in 720p HD. Doing this will improve the overall quality of the video.*

Check it out here, and don't forget to Subscribe to our channel for more Halo: CE Anniversary videos!

I put together this video for all the skulls in halo anniversary the infinite ammo skull is by far the hardest skull to get. enjoy

The easiest way to do this is to load up the first level. After getting out of the Cryo-Tube, walk around it to the right and goto the back of the room. There will be two Cylinders. Look behind them to the left to see the Iron Skull.