Halo: Reach

Completed every mission in Halo: Reach alone, on Legendary.

Completed all of the Daily Challenges in a given day.

Killed 10 enemies in Firefight or Campaign with a supercombine explosion.

Used the File Browser to upload a file to your File Share.

Killed 10 enemies in a Firefight or Campaign session with the DMR.

Reached the rank of Captain in the UNSC.

Hijacked a Banshee during the Reach Campaign.

Let a teammate spawn on you 5 times in an Invasion Matchmaking game.

Scored 200,000 points in a Firefight game.

Recommended a file to someone.

Earned a Killionaire medal in Firefight.

Used a Health Pack to replenish life after taking body damage.

Completed the 8th mission on Normal or harder.

Scored 50,000 points in a Firefight game.

Completed the Campaign on Heroic difficulty.

Completed a Firefight set on Legendary without dying.

Completed the Campaign on Legendary difficulty.

Scored 1,000,000 points in a Firefight game.

Killed 3 of the anti-aircraft batteries during the 8th mission.

Completed the 4th mission on Normal or harder.

Killed 10 enemies in a Firefight or Campaign session with the M6G pistol.

Performed an Assassination against an Elite to survive a fall that would've been fatal.

Completed the 7th mission on Normal or harder.

Killed 7 Moa during the 2nd mission of the Campaign.

As an Elite, killed 5 Spartan players in Matchmaking.

Advanced a Commendation to a Silver state.

Earned a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.

Purchased an item from the Armory.

Purchased an item from the Armory that required the rank of Lt. Colonel.

Completed a Weekly Challenge.

Completed the 3rd mission on Normal or harder.

Scored 15,000 points in Score Attack Firefight Matchmaking.

Completed the 10th mission on Normal or harder.

Won a game of Invasion in the 1st phase.

Traded weapons with an AI ally in Campaign.

Finished the 9th mission on Legendary with the Scorpion intact.

Performed an Assassination on an enemy.

Completed the Campaign on Normal difficulty.

Reached the rank of Corporal in the UNSC.

Cleared the 2nd mission without setting foot in a drivable vehicle.

Completed the 9th mission on Normal or harder.

Completed the 5th mission on Normal or harder.

Killed 2 vehicles at once with the Target Locator during the 3rd mission.

Destroyed the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.

Completed the 2nd mission on Normal or harder.

Earned a Killing Spree in multiplayer Matchmaking.

Earned a First Strike Medal in a Matchmaking game.

Completed the 6th mission on Normal or harder.

Killed the Elite Zealot before he escaped during the 5th mission.

Noble 1: Earned a Double Kill with the shotgun in multiplayer Matchmaking.

Noble 1: Earned a kill in a matchmade Rocket Race game.

Defiant: Was the last surviving uninfected player in a matchmade Infection game.

Anniversary: Captured 10 skulls at once in a matchmade Headhunter game.

Defiant: Captured two flags from an enemy capture zone in a matchmade Stockpile game.

Defiant: Killed 3 players with the Oddball in a matchmade Oddball game.

Noble 1: Killed a player at long range with the DMR in a matchmade Slayer game.

Anniversary: Performed a Beat Down on an enemy while using the Jetpack during a matchmade game.

Defiant: Prevented the attacking team from touching the flag in a matchmade 1-Flag CTF game.

Anniversary: Infected 3 players in a single round in a matchmade Infection game.

Anniversary: Killed an enemy with their own grenade that was stuck to you in a matchmade game.

Anniversary: Ran over 5 people with a vehicle in a matchmade game.

Defiant: Assassinated a player that just exited Armor-Lock in a matchmade game.

Noble 1: Destroyed a vehicle using Armor Lock in a matchmade game.

Defiant: Returned two flags in a matchmade CTF game.

Anniversary: Killed the flag carrier with a Plasma Grenade in a matchmade game.

Anniversary: Earned 3 headshots in a row in a matchmade game.

Noble 1: Earned a Double Kill from the Grave in multiplayer Matchmaking.

Noble 1: Your team collected all of the flags in a matchmade Stockpile game.

Noble 1: Your team blew up the research facility in a matchmade Invasion game on Breakpoint.