That Just Happened

Complete the level “The Library” on Heroic difficulty or higher without dying.

Living Legend

Complete every level of the game on Legendary difficulty.

Tying Up Loose Ends

Kill every Elite on the level “Keyes” on Heroic difficulty or above.

He’s Unstoppable!

Complete any level on Heroic difficulty or higher without taking health damage.

Look Out for the Little Guys

Complete the level “Two Betrayals” on Heroic difficulty or higher without killing any Grunts.

Believe in a Hero

Complete every level of the game on Heroic difficulty.

Never Tell Me the Odds

Escape “The Maw” on Legendary with at least a minute left on the count down.

Speed Reader

Complete the level “The Library” on Legendary difficulty in 30 minutes or less.

How Pedestrian

Complete the level “Halo” on any difficulty without entering a vehicle.

Leave It Where It Lay

Complete the level “Two Betrayals” on Legendary difficulty without picking up a new weapon.

All According to Plan...

Kill all the enemies in the first encounter of “Truth and Reconciliation” without being detected.

No-Fly Zone

Destroy three of the four Banshees on “Halo” on any difficulty during a single play-through.

Wraith Hunter

Destroy four Wraith tanks in “Assault on the Control Room” with the Scorpion tank, in a single play.

Grenadier

Escape the map room in “The Silent Cartographer” without firing a shot on Heroic or Legendary.

Beachhead

Storm the beach of “The Silent Cartographer” with no marine casualties on Heroic or Legendary.

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Kill 100 Flood Infection Forms on the level “Keyes” on Heroic difficulty or above.

This One's for Jenkins!

Kill 50 Flood Combat Forms on the level “343 Guilty Spark” on Heroic difficulty or higher.

Standard Operating Brocedure

Complete any level on Normal difficulty cooperatively.

Brovershield

Complete any level on Heroic difficulty cooperatively.

Bro Hammer

Complete any level on Legendary difficulty cooperatively.

Close Quarters Combat

Complete the level “Truth and Reconciliation” with at least four rounds left in your Sniper Rifle.

Tsantsa

Complete any level with at least three skulls active on Heroic difficulty or higher.

Dear Diary...

Read all of the terminals hidden throughout the campaign.

Breaking Quarantine

Escape the Forerunner facility on the level “343 Guilty Spark” in 21 minutes or less.

Heavy Reading

Read half the terminals hidden throughout the campaign.

Headhunter

Locate all the skulls hidden throughout the campaign.

Skulls Taken!

Locate half of the skulls hidden throughout the campaign.

Birth of a Spartan

Complete every level of the game on Normal difficulty.

The Maw

Complete the level “The Maw” on any difficulty.

This Side Up

Complete the Warthog ride on the level “The Maw” without being forcibly ejected from your vehicle.

Keyes

Complete the level “Keyes” on any difficulty.

Two Betrayals

Complete the level “Two Betrayals” on any difficulty.

The Library

Complete the level “The Library” on any difficulty.

343 Guilty Spark

Complete the level “343 Guilty Spark” on any difficulty.

Assault on the Control Room

Complete the level “Assault on the Control Room” on any difficulty.

I’ll Be Taking That!

Pilot a Banshee on the level “Assault on the Control Room.”

The Silent Cartographer

Complete the level “The Silent Cartographer” on any difficulty.

Looks like the Oddball

Find your first campaign skull.

Truth and Reconciliation

Complete the level “Truth and Reconciliation” on any difficulty.

What have we here?

Read a terminal.

Halo

Complete the level “Halo” on any difficulty.

Pillar of Autumn

Complete the level “Pillar of Autumn” on any difficulty.

Overshields are for Sissies

Complete the level “Pillar of Autumn” on Legendary without picking up an Overshield.

Walk it Off

Complete the level “Pillar of Autumn” on Legendary without picking up a health kit.