Anniversary: Ran over 5 people with a vehicle in a matchmade game.
Anniversary: Earned 3 headshots in a row in a matchmade game.
Noble 1: Your team collected all of the flags in a matchmade Stockpile game.
Defiant: Captured two flags from an enemy capture zone in a matchmade Stockpile game.
Defiant: Returned two flags in a matchmade CTF game.
Noble 1: Earned a Double Kill from the Grave in multiplayer Matchmaking.
Reached the rank of Captain in the UNSC.
Noble 1: Your team blew up the research facility in a matchmade Invasion game on Breakpoint.
Noble 1: Earned a kill in a matchmade Rocket Race game.
Noble 1: Killed a player at long range with the DMR in a matchmade Slayer game.
Noble 1: Earned a Double Kill with the shotgun in multiplayer Matchmaking.
Noble 1: Destroyed a vehicle using Armor Lock in a matchmade game.
Completed a Weekly Challenge.
Advanced a Commendation to a Silver state.
Killed 2 vehicles at once with the Target Locator during the 3rd mission.
Earned a Killing Spree in multiplayer Matchmaking.
Performed an Assassination against an Elite to survive a fall that would've been fatal.
Cleared the 2nd mission without setting foot in a drivable vehicle.
Scored 1,000,000 points in a Firefight game.
Killed 10 enemies in Firefight or Campaign with a supercombine explosion.
Completed all of the Daily Challenges in a given day.
Killed 10 enemies in a Firefight or Campaign session with the DMR.
Scored 15,000 points in Score Attack Firefight Matchmaking.
Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.
As an Elite, killed 5 Spartan players in Matchmaking.
Won a game of Invasion in the 1st phase.
Killed 7 Moa during the 2nd mission of the Campaign.
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
Completed a Firefight set on Legendary without dying.
Scored 200,000 points in a Firefight game.
Earned a Killionaire medal in Firefight.
Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
Scored 50,000 points in a Firefight game.
Earned a First Strike Medal in a Matchmaking game.
Recommended a file to someone.
Used the File Browser to upload a file to your File Share.
Reached the rank of Corporal in the UNSC.
Completed the 10th mission on Normal or harder.
Completed the Campaign on Normal difficulty.
Completed the 9th mission on Normal or harder.
Completed the 8th mission on Normal or harder.
Killed 3 of the anti-aircraft batteries during the 8th mission.
Completed the 7th mission on Normal or harder.
Completed the 6th mission on Normal or harder.
Completed the 5th mission on Normal or harder.
Hijacked a Banshee during the Reach Campaign.
Killed the Elite Zealot before he escaped during the 5th mission.
Completed the 4th mission on Normal or harder.
Performed an Assassination on an enemy.
Completed the 3rd mission on Normal or harder.
Traded weapons with an AI ally in Campaign.
Completed the 2nd mission on Normal or harder.
Used a Health Pack to replenish life after taking body damage.
Purchased an item from the Armory.
Purchased an item from the Armory that required the rank of Lt. Colonel.
Defiant: Killed 3 players with the Oddball in a matchmade Oddball game.
Defiant: Prevented the attacking team from touching the flag in a matchmade 1-Flag CTF game.
Defiant: Assassinated a player that just exited Armor-Lock in a matchmade game.
Defiant: Was the last surviving uninfected player in a matchmade Infection game.
Anniversary: Infected 3 players in a single round in a matchmade Infection game.
Anniversary: Killed the flag carrier with a Plasma Grenade in a matchmade game.
Anniversary: Performed a Beat Down on an enemy while using the Jetpack during a matchmade game.
Anniversary: Captured 10 skulls at once in a matchmade Headhunter game.
Anniversary: Killed an enemy with their own grenade that was stuck to you in a matchmade game.
Completed every mission in Halo: Reach alone, on Legendary.
Completed the Campaign on Legendary difficulty.
Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
Finished the 9th mission on Legendary with the Scorpion intact.
Completed the Campaign on Heroic difficulty.
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