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Unlocked: 20 Apr 2013 16:59:02
Clear the 2nd mission without setting foot in a drivable vehicle.
Unlocked: 20 Apr 2013 16:57:00
Complete each Campaign Mission on Legendary - alone.
Unlocked: 05 Apr 2013 18:40:31
Skunked!
10Win a game of Invasion in the 1st phase.
Unlocked: 04 Apr 2013 17:55:31
Perform an Assassination against an Elite to survive a fall that would've been fatal.
Unlocked: 15 Jan 2011 23:53:13
Make It Rain
10Purchase an item from the Armory that requires the rank of Lt. Colonel.
Unlocked: 22 Oct 2010 19:59:44
Reach the rank of Captain in the UNSC.
Unlocked: 09 Oct 2010 18:37:31
Complete the Campaign on Legendary difficulty.
Unlocked: 07 Oct 2010 21:17:31
Complete the 10th mission on Normal or harder.
Unlocked: 07 Oct 2010 21:17:31
Complete the Campaign on Heroic difficulty.
Unlocked: 07 Oct 2010 21:17:31
Complete the Campaign on Normal difficulty.
Unlocked: 07 Oct 2010 21:17:30
Complete the 9th mission on Normal or harder.
Unlocked: 07 Oct 2010 19:25:42
Finish the 9th mission on Legendary with the Scorpion intact.
Unlocked: 07 Oct 2010 18:52:16
Complete the 8th mission on Normal or harder.
Unlocked: 05 Oct 2010 21:01:22
Kill 3 of the anti-aircraft batteries during the 8th mission.
Unlocked: 05 Oct 2010 20:59:50
Complete the 7th mission on Normal or harder.
Unlocked: 05 Oct 2010 19:51:09
Kill 2 vehicles at once with the Target Locator during the 3rd mission.
Unlocked: 27 Sep 2010 11:35:10
Complete a Weekly Challenge.
Unlocked: 25 Sep 2010 12:03:18
Let a teammate spawn on you 5 times in an Invasion Matchmaking game.
Unlocked: 24 Sep 2010 14:02:28
Kill 7 Moa during the 2nd mission of the Campaign.
Unlocked: 23 Sep 2010 19:33:51
As an Elite, kill 5 Spartan players in Matchmaking.
Unlocked: 22 Sep 2010 17:30:36
Recommend a file to someone.
Unlocked: 22 Sep 2010 15:50:58
Advance any Commendation to its Silver state.
Unlocked: 22 Sep 2010 15:39:14
Perform an Assassination on an enemy.
Unlocked: 17 Sep 2010 16:55:21
Kill 10 enemies in Firefight or Campaign with a supercombine explosion.
Unlocked: 17 Sep 2010 15:05:55
Yes, Sensei
10Earn a First Strike Medal in a Matchmaking game.
Unlocked: 17 Sep 2010 14:07:02
Complete all of the Daily Challenges in a given day.
Unlocked: 17 Sep 2010 09:12:16
Score Attack
10Score 15,000 points in Score Attack Firefight Matchmaking.
Unlocked: 16 Sep 2010 18:33:40
Reach the rank of Corporal in the UNSC.
Unlocked: 16 Sep 2010 18:22:53
Earn a Killing Spree in multiplayer Matchmaking.
Unlocked: 16 Sep 2010 17:37:05
Use a Health Pack to recover life after taking body damage.
Unlocked: 16 Sep 2010 17:25:58
Score 1,000,000 points in Firefight on any map.
Unlocked: 15 Sep 2010 19:23:40
Earn a Killionaire medal in Firefight.
Unlocked: 15 Sep 2010 19:04:45
Lucky Me
25Earn a Triple Kill while Jetpacking in Campaign, Firefight or Matchmaking.
Unlocked: 15 Sep 2010 19:02:04
Kill 10 enemies in a Firefight or Campaign session with the DMR.
Unlocked: 15 Sep 2010 18:44:29
Complete a Firefight set on Legendary without dying.
Unlocked: 15 Sep 2010 18:19:57
Score 200,000 points in Firefight on any map.
Unlocked: 15 Sep 2010 18:18:57
Firestarter
10Score 50,000 points in Firefight on any map.
Unlocked: 15 Sep 2010 18:07:12
Kill 10 Enemies in a Firefight or Campaign session with the M6G pistol.
Unlocked: 15 Sep 2010 17:48:54
Purchase any item from the Armory.
Unlocked: 15 Sep 2010 17:44:25
Complete the 2nd mission on Normal or harder.
Unlocked: Offline
Swap Meet
10Trade weapons with an AI ally in Campaign.
Unlocked: Offline
Complete the 3rd mission on Normal or harder.
Unlocked: Offline
Complete the 4th mission on Normal or harder.
Unlocked: Offline
Kill the Elite Zealot before he can escape during the 5th mission.
Unlocked: Offline
To War
10Complete the 5th mission on Normal or harder.
Unlocked: Offline
Destroy the Corvette's engines & escort in under 3 minutes in the 6th mission on Heroic or harder.
Unlocked: Offline
Complete the 6th mission on Normal or harder.
Unlocked: Offline
Hijack a Banshee during the Reach Campaign.
Unlocked: Offline
Noble 1: Blow up the research facility in a matchmade Invasion game on Breakpoint.
Unlocked: 04 Apr 2013 17:44:34
Noble 1: Destroy a vehicle using Armor Lock in a matchmade game.
Unlocked: 04 Apr 2013 17:40:14
Noble 1: Earn a kill in a matchmade Rocket Race game.
Unlocked: 01 Apr 2013 20:18:38
Noble 1: Collect all of the flags in a matchmade Stockpile game.
Unlocked: 01 Apr 2013 20:06:22
Noble 1: Kill a player at long range with the DMR in a matchmade Slayer game.
Unlocked: 01 Apr 2013 19:55:22
Noble 1: Earn a Double Kill from the Grave in multiplayer Matchmaking.
Unlocked: 01 Apr 2013 19:43:29
Both Barrels
50Noble 1: Earn a Double Kill with the shotgun in multiplayer Matchmaking.
Unlocked: 01 Apr 2013 19:12:12
All Alone
10Defiant: Be the last surviving uninfected player in a matchmade Infection game.
Unlocked: 20 Apr 2013 15:33:18
Defiant: Assassinate a player that just exited Armor-Lock in a matchmade game.
Unlocked: 20 Apr 2013 15:09:12
Defiant: Prevent the attacking team from touching the flag in a matchmade 1-Flag CTF game.
Unlocked: 20 Apr 2013 14:34:20
Defiant: Capture two flags from an enemy capture zone in a matchmade Stockpile game.
Unlocked: 02 Apr 2011 22:23:13
Defiant: Kill 3 players with the Oddball in a matchmade Oddball game.
Unlocked: 02 Apr 2011 22:15:19
Defiant: Successfully return two flags in a matchmade CTF game.
Unlocked: 02 Apr 2011 22:11:54
Anniversary: Infect 3 players in a single round in a matchmade Infection game.
Unlocked: 20 Apr 2013 13:38:28
Anniversary: Stick and kill the flag carrier with a Plasma Grenade in a matchmade game.
Unlocked: 20 Apr 2013 13:21:02
Anniversary: Capture 10 skulls at once in a matchmade Headhunter game.
Unlocked: 20 Apr 2013 13:14:42
Anniversary: Kill an enemy with their own Plasma Grenade that is stuck to you in a matchmade game.
Unlocked: 20 Apr 2013 12:45:48
Dive Bomber
50Anniversary: Perform a Beat Down on an enemy player while using the Jetpack during a matchmade game.
Unlocked: 20 Apr 2013 12:40:41
Anniversary: Run over 5 people with a vehicle in a matchmade game.
Unlocked: 20 Apr 2013 12:36:37
Top Shot
50Anniversary: Get 3 headshot kills in a row in a matchmade game.
Unlocked: 04 Apr 2013 19:30:04