10 A New ChallengerCompleted all of the Daily Challenges in a given day.
10 A Spoonful Of BlamiteKilled 10 enemies in Firefight or Campaign with a supercombine explosion.
10 An Elegant WeaponKilled 10 enemies in a Firefight or Campaign session with the DMR.
10 Crowd ControlEarned a Killionaire medal in Firefight.
10 Dust And EchoesCompleted the 8th mission on Normal or harder.
10 FirestarterScored 50,000 points in a Firefight game.
10 I Didn't Train To Be A PilotKilled 3 of the anti-aircraft batteries during the 8th mission.
10 I Need A WeaponCompleted the 4th mission on Normal or harder.
10 I See You Favour A .45Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
10 Into The Howling DarkCompleted the 7th mission on Normal or harder.
10 Lemme Upgrade YaAdvanced a Commendation to a Silver state.
10 Make It DrizzlePurchased an item from the Armory.
10 Make It RainPurchased an item from the Armory that required the rank of Lt. Colonel.
10 One Down, 51 To GoCompleted a Weekly Challenge.
10 Protocol Dictates ActionCompleted the 3rd mission on Normal or harder.
10 Score AttackScored 15,000 points in Score Attack Firefight Matchmaking.
10 Send Me Out... With A BangCompleted the 10th mission on Normal or harder.
10 SkunkedWon a game of Invasion in the 1st phase.
10 Swap MeetTraded weapons with an AI ally in Campaign.
10 That's A KnifePerformed an Assassination on an enemy.
10 This Is Not Your GraveCompleted the 9th mission on Normal or harder.
10 To WarCompleted the 5th mission on Normal or harder.
10 We're Just Getting StartedCompleted the 2nd mission on Normal or harder.
10 Yes, SenseiEarned a First Strike Medal in a Matchmaking game.
10 You Flew Pretty GoodCompleted the 6th mission on Normal or harder.
125 Gods Must Be StrongCompleted the Campaign on Legendary difficulty.
15 The Start Of SomethingReached the rank of Corporal in the UNSC.
150 A Monument To All Your SinsCompleted every mission in Halo: Reach alone, on Legendary.
25 An Honor ServingReached the rank of Captain in the UNSC.
25 Banshees, Fast And LowHijacked a Banshee during the Reach Campaign.
25 Blaze Of GloryScored 200,000 points in a Firefight game.
25 Game, Set, MatchCompleted a Firefight set on Legendary without dying.
25 If They Came To Hear Me BegPerformed an Assassination against an Elite to survive a fall that would've been fatal.
25 Lucky MeEarned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
25 Tank Beats EverythingFinished the 9th mission on Legendary with the Scorpion intact.
25 The Soldier We Need You To BeCompleted the Campaign on Normal difficulty.
25 They've Always Been FasterCleared the 2nd mission without setting foot in a drivable vehicle.
25 Two Corpses In One GraveKilled 2 vehicles at once with the Target Locator in the 3rd mission.
25 Wake Up ButtercupDestroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
25 Your Heresy Will Stay Your FeetKilled the Elite Zealot before he escaped during the 5th mission.
5 A Storage SolutionUsed the File Browser to upload a file to your File Share.
5 Be My Wingman AnytimeLet a teammate spawn on you 5 times in an Invasion Matchmaking game.
5 Cool File, BroRecommended a file to someone.
5 Doctor, DoctorUsed a Health Pack to replenish life after taking body damage.
5 Keep It CleanKilled 7 Moa during the 2nd mission of the Campaign.
5 Knife To A Gun FightAs an Elite, killed 5 Spartan players in Matchmaking.
5 What's A Killing Spree?Earned a Killing Spree in multiplayer Matchmaking.
50 Folks Need Heroes...Completed the Campaign on Heroic difficulty.
75 Heat In The PipeScored 1,000,000 points in a Firefight game.