Purchase an item from the Armory that requires the rank of Lt. Colonel.

Unlocked: 02 Feb 2011 21:40:09

Reach the rank of Captain in the UNSC.

Unlocked: 13 Jan 2011 15:31:47

Score 1,000,000 points in Firefight on any map.

Unlocked: 06 Jan 2011 01:49:41

Complete a Firefight set on Legendary without dying.

Unlocked: 06 Jan 2011 01:29:44

Score 200,000 points in Firefight on any map.

Unlocked: 06 Jan 2011 01:19:16

Earn a Killionaire medal in Firefight.

Unlocked: 06 Jan 2011 01:15:05

Score 50,000 points in Firefight on any map.

Unlocked: 06 Jan 2011 01:10:56

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

Unlocked: 06 Jan 2011 00:21:46

Win a game of Invasion in the 1st phase.

Unlocked: 06 Jan 2011 00:16:10

As an Elite, kill 5 Spartan players in Matchmaking.

Unlocked: 05 Jan 2011 23:29:23

Score 15,000 points in Score Attack Firefight Matchmaking.

Unlocked: 04 Jan 2011 23:37:33

Complete all of the Daily Challenges in a given day.

Unlocked: 03 Jan 2011 18:39:34

Recommend a file to someone.

Unlocked: 03 Jan 2011 18:00:39

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

Unlocked: 03 Jan 2011 18:00:29

Earn a First Strike Medal in a Matchmaking game.

Unlocked: 03 Jan 2011 17:48:03

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

Unlocked: 03 Jan 2011 17:35:07

Complete each Campaign Mission on Legendary - alone.

Unlocked: 03 Jan 2011 15:33:42

Complete the Campaign on Legendary difficulty.

Unlocked: 03 Jan 2011 15:33:42

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

Unlocked: 03 Jan 2011 14:12:14

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

Unlocked: 03 Jan 2011 14:00:54

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

Unlocked: 03 Jan 2011 13:47:01

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

Unlocked: 03 Jan 2011 13:37:35

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

Unlocked: 03 Jan 2011 13:34:18

Earn a Killing Spree in multiplayer Matchmaking.

Unlocked: 03 Jan 2011 06:48:30

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

Unlocked: 03 Jan 2011 06:21:04

Complete the 10th mission on Normal or harder.

Unlocked: 03 Jan 2011 06:07:30

Complete the Campaign on Heroic difficulty.

Unlocked: 03 Jan 2011 06:07:30

Complete the Campaign on Normal difficulty.

Unlocked: 03 Jan 2011 06:07:30

Complete a Weekly Challenge.

Unlocked: 03 Jan 2011 06:07:30

Advance any Commendation to its Silver state.

Unlocked: 03 Jan 2011 05:36:45

Reach the rank of Corporal in the UNSC.

Unlocked: 03 Jan 2011 05:08:26

Complete the 9th mission on Normal or harder.

Unlocked: 03 Jan 2011 04:55:06

Complete the 8th mission on Normal or harder.

Unlocked: 03 Jan 2011 04:02:55

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

Unlocked: 03 Jan 2011 03:27:32

Complete the 7th mission on Normal or harder.

Unlocked: 03 Jan 2011 03:24:32

Complete the 6th mission on Normal or harder.

Unlocked: 03 Jan 2011 02:26:19

Trade weapons with an AI ally in Campaign.

Unlocked: 03 Jan 2011 01:55:46

Complete the 5th mission on Normal or harder.

Unlocked: 03 Jan 2011 01:02:25

Hijack a Banshee during the Reach Campaign.

Unlocked: 03 Jan 2011 00:58:51

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

Unlocked: 03 Jan 2011 00:39:23

Kill the Elite Zealot before he can escape during the 5th mission.

Unlocked: 03 Jan 2011 00:37:31

Complete the 4th mission on Normal or harder.

Unlocked: 03 Jan 2011 00:12:22

Complete the 3rd mission on Normal or harder.

Unlocked: 02 Jan 2011 23:34:39

Perform an Assassination on an enemy.

Unlocked: 02 Jan 2011 23:22:57

Complete the 2nd mission on Normal or harder.

Unlocked: 02 Jan 2011 22:51:48

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

Unlocked: 02 Jan 2011 22:42:03

Kill 10 Enemies in a Firefight or Campaign session with the M6G pistol.

Unlocked: 02 Jan 2011 22:37:27

Use a Health Pack to recover life after taking body damage.

Unlocked: 02 Jan 2011 22:36:54

Purchase any item from the Armory.

Unlocked: 02 Jan 2011 22:28:30

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

Unlocked: 21 Jan 2011 16:44:45

Noble 1: Collect all of the flags in a matchmade Stockpile game.

Unlocked: 14 Jan 2011 18:22:03

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

Unlocked: 14 Jan 2011 17:14:38

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

Unlocked: 14 Jan 2011 16:10:50

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

Unlocked: 13 Jan 2011 18:42:57

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

Unlocked: 13 Jan 2011 17:28:05

Noble 1: Blow up the research facility in a matchmade Invasion game on Breakpoint.

Unlocked: 13 Jan 2011 17:01:34

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

Unlocked: 18 May 2012 14:40:20

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

Unlocked: 07 Apr 2012 14:56:27

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

Unlocked: 17 Jan 2012 16:50:10

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

Unlocked: 03 Apr 2011 16:14:11

Defiant: Successfully return two flags in a matchmade CTF game.

Unlocked: 31 Mar 2011 14:45:19

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

Unlocked: 31 Mar 2011 14:11:23

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

Unlocked: 11 Dec 2011 05:21:57

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

Unlocked: 11 Dec 2011 04:45:50

Anniversary: Kill an enemy with their own Plasma Grenade that is stuck to you in a matchmade game.

Unlocked: 11 Dec 2011 04:12:18

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

Unlocked: 11 Dec 2011 04:00:14

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

Unlocked: 11 Dec 2011 02:59:30

Anniversary: Stick and kill the flag carrier with a Plasma Grenade in a matchmade game.

Unlocked: 11 Dec 2011 01:31:43

Anniversary: Get 3 headshot kills in a row in a matchmade game.

Unlocked: 11 Dec 2011 00:48:44