A lot has changed since then, and Halo: Combat Evolved Anniversary knows that kids these days couldn't handle a Halo experience devoid of achievements, so jump past the break for a complete list of points you never had the opportunity to earn in the first place.
Achievement Title (Point Value)
Achievement Description
The Silent Cartographer (25)
Complete the level "The Silent Cartographer" on any difficulty.
Assault on the Control Room (25)
Complete the level "Assault on the Control Room" on any difficulty.
Pillar of Autumn (25)
Complete the level "Pillar of Autumn" on any difficulty.
Halo (25)
Complete the level "Halo" on any difficulty.
Truth and Reconciliation (25)
Complete the level "Truth and Reconciliation" on any difficulty.
343 Guilty Spark (25)
Complete the level "343 Guilty Spark" on any difficulty.
The Library (25)
Complete the level "The Library" on any difficulty.
Two Betrayals (25)
Complete the level "Two Betrayals" on any difficulty.
Keyes (25)
Complete the level "Keyes" on any difficulty.
The Maw (25)
Complete the level "The Maw" on any difficulty.
Tsantsa (50)
Complete any level with at least three skulls active on Heroic difficulty or higher.
What have we here? (10)
Read a terminal.
Heavy Reading (25)
Read half the terminals hidden throughout the campaign.
Dear Diary... (50)
Read all of the terminals hidden throughout the campaign.
Looks like the Oddball (10)
Find your first campaign skull.
Skulls Taken! (25)
Locate half of the skulls hidden throughout the campaign.
Headhunter (50)
Locate all the skulls hidden throughout the campaign.
Birth of a Spartan (10)
Complete every level of the game on Normal difficulty.
Believe in a Hero (20)
Complete every level of the game on Heroic difficulty.
Living Legend (50)
Complete every level of the game on Legendary difficulty.
Standard Operating Brocedure (10)
Complete any level on Normal difficulty cooperatively.
Brovershield (20)
Complete any level on Heroic difficulty cooperatively.
Bro Hammer (50)
Complete any level on Legendary difficulty cooperatively.
He's Unstoppable! (20)
Complete any level on Heroic difficulty or higher without taking health damage.
Overshields are for Sissies (10)
Complete the level "Pillar of Autumn" on Legendary without picking up an Overshield.
Walk it Off (25)
Complete the level "Pillar of Autumn" on Legendary without picking up a health kit.
No-Fly Zone (10)
Destroy three of the four Banshees on "Halo" on any difficulty during a single play-through.
How Pedestrian (25)
Complete the level "Halo" on any difficulty without entering a vehicle.
Close Quarters Combat (25)
Complete the level "Truth and Reconciliation" with at least four rounds left in your Sniper Rifle.
I'll Be Taking That! (25)
Pilot a Banshee on the level "Assault on the Control Room."
This One's for Jenkins! (10)
Kill 50 Flood Combat Forms on the level "343 Guilty Spark" on Heroic difficulty or higher.
That Just Happened (10)
Complete the level "The Library" on Heroic difficulty or higher without dying.
Speed Reader (25)
Complete the level "The Library" on Legendary difficulty in 30 minutes or less.
Look Out for the Little Guys (10)
Complete the level "Two Betrayals" on Heroic difficulty or higher without killing any Grunts.
Leave It Where It Lay (25)
Complete the level "Two Betrayals" on Legendary difficulty without picking up a new weapon.
Popcorn.gif (25)
Kill 100 Flood Infection Forms on the level "Keyes" on Heroic difficulty or above.
All According to Plan... (10)
Kill all the enemies in the first encounter of "Truth and Reconciliation" without being detected.
Beachhead (10)
Storm the beach of "The Silent Cartographer" with no marine casualties on Heroic or Legendary.
Grenadier (25)
Escape the map room in "The Silent Cartographer" without firing a shot on Heroic or Legendary.
Wraith Hunter (10)
Destroy four Wraith tanks in "Assault on the Control Room" with the Scorpion tank, in a single play.
Breaking Quarantine (25)
Escape the Forerunner facility on the level "343 Guilty Spark" in 21 minutes or less.
Tying Up Loose Ends (10)
Kill every Elite on the level "Keyes" on Heroic difficulty or above.
This Side Up (10)
Complete the Warthog ride on the level "The Maw" without being forcibly ejected from your vehicle.
Never Tell Me the Odds (25)
Escape "The Maw" on Legendary with at least a minute left on the count down.
