Original Achievements:
| The Soldier We Need You To Be | 25 | |
| Completed the Campaign on Normal difficulty. | ||
| Folks Need Heroes... | 50 | |
| Completed the Campaign on Heroic difficulty. | ||
| Gods Must Be Strong | 125 | |
| Completed the Campaign on Legendary difficulty. | ||
| A Monument To All Your Sins | 150 | |
| Completed every mission in Halo: Reach alone, on Legendary. | ||
| We're Just Getting Started | 10 | |
| Completed the 2nd mission on Normal or harder. | ||
| Protocol Dictates Action | 10 | |
| Completed the 3rd mission on Normal or harder. | ||
| I Need A Weapon | 10 | |
| Completed the 4th mission on Normal or harder. | ||
| To War | 10 | |
| Completed the 5th mission on Normal or harder. | ||
| You Flew Pretty Good | 10 | |
| Completed the 6th mission on Normal or harder. | ||
| Into The Howling Dark | 10 | |
| Completed the 7th mission on Normal or harder. | ||
| Dust And Echoes | 10 | |
| Completed the 8th mission on Normal or harder. | ||
| This Is Not Your Grave | 10 | |
| Completed the 9th mission on Normal or harder. | ||
| Send Me Out... With A Bang | 10 | |
| Completed the 10th mission on Normal or harder. | ||
| They've Always Been Faster | 25 | |
| Cleared the 2nd mission without setting foot in a drivable vehicle. | ||
| Two Corpses In One Grave | 25 | |
| Killed 2 vehicles at once with the Target Locator in the 3rd mission. | ||
| Banshees, Fast And Low | 25 | |
| Hijacked a Banshee during the Reach Campaign. | ||
| Your Heresy Will Stay Your Feet | 25 | |
| Killed the Elite Zealot before he escaped during the 5th mission. | ||
| If They Came To Hear Me Beg | 25 | |
| Performed an Assassination against an Elite to survive a fall that would've been fatal. | ||
| Wake Up Buttercup | 25 | |
| Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder. | ||
| Tank Beats Everything | 25 | |
| Finished the 9th mission on Legendary with the Scorpion intact. | ||
| Lucky Me | 25 | |
| Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking. | ||
| KEEP IT CLEAN | 5 | |
| Killed 7 Moa during the 2nd mission of the Campaign. | ||
| I Didn't Train To Be A Pilot | 10 | |
| Killed 3 of the anti-aircraft batteries during the 8th mission. | ||
| Doctor, Doctor | 5 | |
| Used a Health Pack to replenish life after taking body damage. | ||
| That's A Knife | 10 | |
| Performed an Assassination on an enemy. | ||
| I See You Favour A .45 | 10 | |
| Killed 10 enemies in a Firefight or Campaign session with the M6G pistol. | ||
| An Elegant Weapon | 10 | |
| Killed 10 enemies in a Firefight or Campaign session with the DMR. | ||
| Swap Meet | 10 | |
| Traded weapons with an AI ally in Campaign. | ||
| A Spoonful Of Blamite | 10 | |
| Killed 10 enemies in Firefight or Campaign with a supercombine explosion. | ||
| Be My Wingman Anytime | 5 | |
| Let a teammate spawn on you 5 times in an Invasion Matchmaking game. | ||
| Yes, Sensei | 10 | |
| Earned a First Strike Medal in a Matchmaking game. | ||
| Skunked | 10 | |
| Won a game of Invasion in the 1st phase. | ||
| What's A Killing Spree? | 5 | |
| Earned a Killing Spree in multiplayer Matchmaking. | ||
| Crowd Control | 10 | |
| Earned a Killionaire medal in Firefight. | ||
| Knife To A Gun Fight | 5 | |
| As an Elite, killed 5 Spartan players in Matchmaking. | ||
| Score Attack | 10 | |
| Scored 15,000 points in Score Attack Firefight Matchmaking. | ||
| Firestarter | 10 | |
| Scored 50,000 points in a Firefight game. | ||
| Blaze Of Glory | 25 | |
| Scored 200,000 points in a Firefight game. | ||
| Heat In The Pipe | 75 | |
| Scored 1,000,000 points in a Firefight game. | ||
| Game, Set, Match | 25 | |
| Completed a Firefight set on Legendary without dying. | ||
| Make It Rain | 10 | |
| Purchased an item from the Armory that required the rank of Lt. Colonel. | ||
| The Start Of Something | 15 | |
| Reached the rank of Corporal in the UNSC. | ||
| An Honor Serving | 25 | |
| Reached the rank of Captain in the UNSC. | ||
| A Storage Solution | 5 | |
| Used the File Browser to upload a file to your File Share. | ||
| A New Challenger | 10 | |
| Completed all of the Daily Challenges in a given day. | ||
| Make It Drizzle | 10 | |
| Purchased an item from the Armory. | ||
| Cool File, Bro | 5 | |
| Recommended a file to someone. | ||
| Lemme Upgrade Ya | 10 | |
| Advanced a Commendation to a Silver state. | ||
| One Down, 51 To Go | 10 | |
| Completed a Weekly Challenge. |
