- Make It Rain
Purchased an item from the Armory that required the rank of Lt. Colonel.
04 December 2010 - 10 guides
- An Honor Serving
Reached the rank of Captain in the UNSC.
13 October 2010 - 6 guides
- KEEP IT CLEAN
Killed 7 Moa during the 2nd mission of the Campaign.
Unlocked offline - 7 guides
- To War
Completed the 5th mission on Normal or harder.
Unlocked offline - 3 guides
- Into the Howling Dark
Completed the 7th mission on Normal or harder.
Unlocked offline - 2 guides
- Banshees, Fast and Low
Hijacked a Banshee during the Reach Campaign.
Unlocked offline - 10 guides
- If They Came to Hear Me Beg
Performed an Assassination against an Elite to survive a fall that would've been fatal.
Unlocked offline - 41 guides
- A Monument to All Your Sins
Completed every mission in Halo: Reach alone, on Legendary.
30 September 2010 - 27 guides
- Skunked!
Won a game of Invasion in the 1st phase.
26 September 2010 - 3 guides
- One Down, 51 to Go
Completed a Weekly Challenge.
22 September 2010 - 4 guides
- Two Corpses in One Grave
Killed 2 vehicles at once with the Target Locator during the 3rd mission.
21 September 2010 - 5 guides
- Lemme Upgrade Ya
Advanced a Commendation to a Silver state.
20 September 2010 - 7 guides
- A New Challenger
Completed all of the Daily Challenges in a given day.
20 September 2010 - 7 guides
- Score Attack
Scored 15,000 points in Score Attack Firefight Matchmaking.
20 September 2010 - 5 guides
- Knife to a Gunfight
As an Elite, killed 5 Spartan players in Matchmaking.
20 September 2010 - 5 guides
- Be My Wingman, Anytime
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
20 September 2010 - 5 guides
- Send Me Out... with a Bang
Completed the 10th mission on Normal or harder.
19 September 2010 - 5 guides
- Gods Must Be Strong
Completed the Campaign on Legendary difficulty.
19 September 2010 - 3 guides
- Folks Need Heroes...
Completed the Campaign on Heroic difficulty.
19 September 2010 - 2 guides
- The Soldier We Needed You To Be
Completed the Campaign on Normal difficulty.
19 September 2010 - 2 guides
- This is Not Your Grave...
Completed the 9th mission on Normal or harder.
19 September 2010 - 2 guides
- Tank Beats Everything
Finished the 9th mission on Legendary with the Scorpion intact.
19 September 2010 - 13 guides
- Dust and Echoes
Completed the 8th mission on Normal or harder.
19 September 2010 - 3 guides
- I Didn't Train to Be a Pilot
Killed 3 of the anti-aircraft batteries during the 8th mission.
19 September 2010 - 4 guides
- What's a Killing Spree?
Earned a Killing Spree in multiplayer Matchmaking.
19 September 2010 - 4 guides
- Yes, Sensei
Earned a First Strike Medal in a Matchmaking game.
19 September 2010 - 7 guides
- Cool File, Bro
Recommended a file to someone.
18 September 2010 - 3 guides
- A Storage Solution
Used the File Browser to upload a file to your File Share.
18 September 2010 - 6 guides
- You Flew Pretty Good
Completed the 6th mission on Normal or harder.
18 September 2010 - 2 guides
- Wake Up, Buttercup
Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
18 September 2010 - 4 guides
- Heat in the Pipe
Scored 1,000,000 points in a Firefight game.
17 September 2010 - 14 guides
- A Spoonful of Blamite
Killed 10 enemies in Firefight or Campaign with a supercombine explosion.
17 September 2010 - 10 guides
- Game, Set, Match
Completed a Firefight set on Legendary without dying.
17 September 2010 - 5 guides
- Blaze of Glory
Scored 200,000 points in a Firefight game.
17 September 2010 - 5 guides
- Crowd Control
Earned a Killionaire medal in Firefight.
17 September 2010 - 10 guides
- Firestarter
Scored 50,000 points in a Firefight game.
17 September 2010 - 4 guides
- Lucky Me
Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
17 September 2010 - 11 guides
- They've Always Been Faster
Cleared the 2nd mission without setting foot in a drivable vehicle.
17 September 2010 - 6 guides
- Your Heresy Will Stay Your Feet
Killed the Elite Zealot before he escaped during the 5th mission.
17 September 2010 - 9 guides
- I Need a Weapon
Completed the 4th mission on Normal or harder.
15 September 2010 - 3 guides
- That's a Knife
Performed an Assassination on an enemy.
15 September 2010 - 7 guides
- Protocol Dictates Action
Completed the 3rd mission on Normal or harder.
15 September 2010 - 6 guides
- The Start of Something
Reached the rank of Corporal in the UNSC.
15 September 2010 - 3 guides
- We're Just Getting Started
Completed the 2nd mission on Normal or harder.
15 September 2010 - 2 guides
- An Elegant Weapon...
Killed 10 enemies in a Firefight or Campaign session with the DMR.
15 September 2010 - 4 guides
- Swap Meet
Traded weapons with an AI ally in Campaign.
15 September 2010 - 5 guides
- I See You Favor a .45
Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
15 September 2010 - 6 guides
- Doctor, Doctor
Used a Health Pack to replenish life after taking body damage.
15 September 2010 - 5 guides
- Make it Drizzle
Purchased an item from the Armory.
15 September 2010 - 5 guides