Orpheus
10Score over 15,000 points in the Campaign meta-game on the eighth mission.
Unlocked: 25 Sep 2009 18:39:38
Ranger
10Score over 50,000 points in the Campaign meta-game on the sixth mission.
Unlocked: 25 Sep 2009 18:11:22
Vanguard
10Score over 50,000 points in the Campaign meta-game on the seventh mission.
Unlocked: 25 Sep 2009 14:47:31
Exterminator
10Score over 15,000 points in the Campaign meta-game on the fifth mission.
Unlocked: 25 Sep 2009 13:38:47
Reclaimer
10Score over 15,000 points in the Campaign meta-game on the final mission.
Unlocked: 25 Sep 2009 13:17:46
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Unlocked: 24 Sep 2009 20:02:15
Overkill
5Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 15:14:12
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 15:03:14
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Unlocked: 24 Sep 2009 14:43:02
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 14:37:55
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Unlocked: 24 Sep 2009 14:35:05
Score 5 grenade sticks in any ranked free for all playlist (Online).
Unlocked: 23 Sep 2009 12:48:41
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Unlocked: 09 Apr 2009 14:51:25
Askar
10Score over 15,000 points in the Campaign meta-game on the fourth mission.
Unlocked: 08 Feb 2009 16:55:12
Cavalier
10Score over 15,000 points in the Campaign meta-game on the third mission.
Unlocked: 08 Feb 2009 16:20:10
Demon
10Score over 15,000 points in the Campaign meta-game on the second mission.
Unlocked: 07 Feb 2009 13:28:07
Guerilla
10Score over 15,000 points in the Campaign meta-game on the first mission.
Unlocked: 07 Feb 2009 12:52:35
Marathon Man
40Locate and access all Terminals in the Campaign.
Unlocked: 22 Jan 2009 15:54:41
Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
Unlocked: 28 Oct 2008 16:24:12
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Unlocked: 28 Oct 2008 16:24:12
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Unlocked: 10 Sep 2008 20:55:38
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 07 Sep 2008 21:11:24
MVP
5Earn the MVP in any ranked playlist (Online).
Unlocked: 31 Aug 2008 12:27:11
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Unlocked: 23 Aug 2008 10:03:44
Advance to the Spartan Officer ranks (Online).
Unlocked: 22 Aug 2008 17:34:22
Catch
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 21 Aug 2008 09:26:37
Return
50Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 20 Aug 2008 20:14:12
Finish the Campaign on Normal.
Unlocked: 20 Aug 2008 20:14:12
Last Stand
40Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 20 Aug 2008 19:38:20
Thunderstorm
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 19:11:23
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Unlocked: 20 Aug 2008 19:05:04
Mythic
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 16:19:58
Iron
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 16:16:41
Fog
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 15:55:34
Tough Luck
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 15:49:02
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Unlocked: 20 Aug 2008 15:19:11
Famine
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 20 Aug 2008 14:22:29
The Key
40Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 19 Aug 2008 17:38:21
Tilt
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 19 Aug 2008 17:22:52
UNSC Spartan
15Earn your Sergeant rating to be recognized as a true Spartan (Online).
Unlocked: 12 Aug 2008 14:38:06
Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Unlocked: 12 Aug 2008 14:30:43
Graduate
10Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
Unlocked: 06 Aug 2008 13:27:53
Refuge
30Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 22:35:49
Cleansing
30Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 21:45:18
Assault
30Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 20:54:08
The Road
20Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 20:37:00
Holdout
20Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 20:10:30
Black Eye
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 27 Jul 2008 19:40:32
Landfall
20Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 27 Jul 2008 19:38:57
Flag Dropped
25On a Legendary map, get 2 flag carrier kills during any ranked or social match.
Unlocked: 26 Sep 2009 10:51:13
Road Rage
25On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Unlocked: 22 Sep 2009 21:51:36
On a Legendary map, get a Splatter Spree during any ranked or social match.
Unlocked: 22 Apr 2009 18:44:38
Defend This
50On a Legendary map, get a flag melee kill during any ranked or social match.
Unlocked: 22 Apr 2009 18:17:24
On a Legendary map, get 3 assassinations during any ranked or social match.
Unlocked: 22 Apr 2009 18:07:28
On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Unlocked: 22 Apr 2009 17:58:01
On a Legendary map, get two Double Kills during any ranked or social match.
Unlocked: 27 Sep 2008 19:47:58
Post Mortem
25On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Unlocked: 26 Sep 2009 11:00:13
On a Mythic map, get a Bulltrue medal during any ranked or social match.
Unlocked: 26 Sep 2009 10:19:52
Killtacular
25On a Mythic map, get a Killtacular during any ranked or social match.
Unlocked: 25 Sep 2009 20:55:37
On a Mythic map, infect 2 humans during any ranked or social match.
Unlocked: 25 Sep 2009 19:21:00
On a Mythic map, kill 2 Zombies during any ranked or social match.
Unlocked: 25 Sep 2009 19:17:54
Hammer Time
25On Assembly, get 5 Hammer kills during any ranked or social match.
Unlocked: 22 Apr 2009 19:38:13
On a Mythic map, get a Perfection medal during any ranked or social match.
Unlocked: 22 Apr 2009 18:07:29
On a Mythic map, get an Extermination during any ranked or social match.
Unlocked: 22 Apr 2009 17:24:27
On a Mythic map, get a Killjoy medal during any ranked or social match.
Unlocked: 09 Apr 2009 16:32:48
Tank Dropper
25On any Mythic map, get a kill on another player while in monitor mode.
Unlocked: 09 Apr 2009 12:48:53
On Sandbox, find the hidden skull.
Unlocked: 09 Apr 2009 12:40:37
On Orbital, find the hidden skull.
Unlocked: 09 Apr 2009 12:32:40
On Assembly, find the hidden skull.
Unlocked: 09 Apr 2009 12:29:57
Pull
25On Citadel, get a Shotgun Spree during any ranked or social match.
Unlocked: 23 Sep 2009 20:16:45
On Heretic, get a Sword Spree during any ranked or social match.
Unlocked: 23 Sep 2009 20:02:02
Ghost Patrol
25On Longshore, get 3 kills with a Ghost during any ranked or social match.
Unlocked: 23 Sep 2009 19:43:03
On Heretic, find the hidden skull.
Unlocked: 22 Sep 2009 14:57:27
On Longshore, find the hidden skull.
Unlocked: 22 Sep 2009 14:54:29
On Citadel, find the hidden skull.
Unlocked: 22 Sep 2009 14:51:41
After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
Unlocked: 08 Nov 2009 17:00:53
Enter into any ranked or social playlist with 7 EXP on the 7th of the month.
Unlocked: 07 Nov 2009 17:19:05
Find all the hidden skulls on the Mythic maps.
Unlocked: 22 Sep 2009 14:57:28
Get to the rank of Lieutenant in any playlist in the new EXP progression system.
Unlocked: 10 Apr 2009 17:37:46