| There are 44 achievements with a total of 1000 points. | |
| The Silent Cartographer | 25 |
| Complete the level “The Silent Cartographer” on any difficulty. |
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| Assault on the Control Room | 25 |
| Complete the level “Assault on the Control Room” on any difficulty. |
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| Pillar of Autumn | 25 |
| Complete the level “Pillar of Autumn” on any difficulty. |
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| Halo | 25 |
| Complete the level “Halo” on any difficulty. |
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| Truth and Reconciliation | 25 |
| Complete the level “Truth and Reconciliation” on any difficulty. |
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| 343 Guilty Spark | 25 |
| Complete the level “343 Guilty Spark” on any difficulty. |
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| The Library | 25 |
| Complete the level “The Library” on any difficulty. |
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| Two Betrayals | 25 |
| Complete the level “Two Betrayals” on any difficulty. |
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| Keyes | 25 |
| Complete the level “Keyes” on any difficulty. |
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| The Maw | 25 |
| Complete the level “The Maw” on any difficulty. |
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| Tsantsa | 50 |
| Complete any level with at least three skulls active on Heroic difficulty or higher. |
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| What have we here? | 10 |
| Read a terminal. |
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| Heavy Reading | 25 |
| Read half the terminals hidden throughout the campaign. |
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| Dear Diary... | 50 |
| Read all of the terminals hidden throughout the campaign. |
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| Looks like the Oddball | 10 |
| Find your first campaign skull. |
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| Skulls Taken! | 25 |
| Locate half of the skulls hidden throughout the campaign. |
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| Headhunter | 50 |
| Locate all the skulls hidden throughout the campaign. |
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| Birth of a Spartan | 10 |
| Complete every level of the game on Normal difficulty. |
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| Believe in a Hero | 20 |
| Complete every level of the game on Heroic difficulty. |
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| Living Legend | 50 |
| Complete every level of the game on Legendary difficulty. |
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| Standard Operating Brocedure | 10 |
| Complete any level on Normal difficulty cooperatively. |
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| Brovershield | 20 |
| Complete any level on Heroic difficulty cooperatively. |
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| Bro Hammer | 50 |
| Complete any level on Legendary difficulty cooperatively. |
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| He’s Unstoppable! | 20 |
| Complete any level on Heroic difficulty or higher without taking health damage. |
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| Overshields are for Sissies | 10 |
| Complete the level “Pillar of Autumn” on Legendary without picking up an Overshield. |
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| Walk it Off | 25 |
| Complete the level “Pillar of Autumn” on Legendary without picking up a health kit. |
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| No-Fly Zone | 10 |
| Destroy three of the four Banshees on “Halo” on any difficulty during a single play-through. |
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| How Pedestrian | 25 |
| Complete the level “Halo” on any difficulty without entering a vehicle. |
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| Close Quarters Combat | 25 |
| Complete the level “Truth and Reconciliation” with at least four rounds left in your Sniper Rifle. |
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| I’ll Be Taking That! | 25 |
| Pilot a Banshee on the level “Assault on the Control Room.” |
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| This One's for Jenkins! | 10 |
| Kill 50 Flood Combat Forms on the level “343 Guilty Spark” on Heroic difficulty or higher. |
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| That Just Happened | 10 |
| Complete the level “The Library” on Heroic difficulty or higher without dying. |
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| Speed Reader | 25 |
| Complete the level “The Library” on Legendary difficulty in 30 minutes or less. |
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| Look Out for the Little Guys | 10 |
| Complete the level “Two Betrayals” on Heroic difficulty or higher without killing any Grunts. |
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| Leave It Where It Lay | 25 |
| Complete the level “Two Betrayals” on Legendary difficulty without picking up a new weapon. |
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| Popcorn.gif | 25 |
| Kill 100 Flood Infection Forms on the level “Keyes” on Heroic difficulty or above. |
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| All According to Plan... | 10 |
| Kill all the enemies in the first encounter of “Truth and Reconciliation” without being detected. |
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| Beachhead | 10 |
| Storm the beach of “The Silent Cartographer” with no marine casualties on Heroic or Legendary. |
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| Grenadier | 25 |
| Escape the map room in “The Silent Cartographer” without firing a shot on Heroic or Legendary. |
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| Wraith Hunter | 10 |
| Destroy four Wraith tanks in “Assault on the Control Room” with the Scorpion tank, in a single play. |
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| Breaking Quarantine | 25 |
| Escape the Forerunner facility on the level “343 Guilty Spark” in 21 minutes or less. |
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| Tying Up Loose Ends | 10 |
| Kill every Elite on the level “Keyes” on Heroic difficulty or above. |
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| This Side Up | 10 |
| Complete the Warthog ride on the level “The Maw” without being forcibly ejected from your vehicle. |
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| Never Tell Me the Odds | 25 |
| Escape “The Maw” on Legendary with at least a minute left on the count down. |
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