Reclaimer
10Score over 15,000 points in the Campaign meta-game on the final mission.
Unlocked: 18 Feb 2008 05:41:19
Orpheus
10Score over 15,000 points in the Campaign meta-game on the eighth mission.
Unlocked: 18 Feb 2008 05:11:40
Vanguard
10Score over 50,000 points in the Campaign meta-game on the seventh mission.
Unlocked: 18 Feb 2008 00:35:10
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Unlocked: 17 Feb 2008 23:01:44
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Unlocked: 17 Feb 2008 22:49:12
Overkill
5Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 02 Feb 2008 03:14:53
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Unlocked: 02 Feb 2008 03:11:16
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Unlocked: 02 Feb 2008 01:48:34
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Unlocked: 02 Feb 2008 01:40:54
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Unlocked: 02 Feb 2008 01:39:30
Score 5 grenade sticks in any ranked free for all playlist (Online).
Unlocked: 30 Jan 2008 02:57:51
Advance to the Spartan Officer ranks (Online).
Unlocked: 01 Jan 2008 07:07:37
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Unlocked: 18 Dec 2007 04:04:48
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Unlocked: 18 Dec 2007 03:40:53
Marathon Man
40Locate and access all Terminals in the Campaign.
Unlocked: 21 Oct 2007 01:40:38
Ranger
10Score over 50,000 points in the Campaign meta-game on the sixth mission.
Unlocked: 13 Oct 2007 01:00:16
Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
Unlocked: 08 Oct 2007 04:35:14
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Unlocked: 08 Oct 2007 04:35:14
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Unlocked: 08 Oct 2007 02:19:59
Exterminator
10Score over 15,000 points in the Campaign meta-game on the fifth mission.
Unlocked: 07 Oct 2007 23:40:02
UNSC Spartan
15Earn your Sergeant rating to be recognized as a true Spartan (Online).
Unlocked: 01 Oct 2007 17:31:32
Tilt
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 16:48:07
Fog
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 16:19:37
Askar
10Score over 15,000 points in the Campaign meta-game on the fourth mission.
Unlocked: 01 Oct 2007 16:16:41
Catch
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 16:03:31
Cavalier
10Score over 15,000 points in the Campaign meta-game on the third mission.
Unlocked: 01 Oct 2007 15:56:31
Tough Luck
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 15:44:02
Demon
10Score over 15,000 points in the Campaign meta-game on the second mission.
Unlocked: 01 Oct 2007 15:36:12
Finish the Campaign on Normal.
Unlocked: 01 Oct 2007 05:23:11
Last Stand
40Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 01 Oct 2007 05:23:10
Thunderstorm
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 03:54:15
Refuge
30Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 01 Oct 2007 03:13:18
Famine
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 01 Oct 2007 02:14:58
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Unlocked: 01 Oct 2007 01:44:02
Guerilla
10Score over 15,000 points in the Campaign meta-game on the first mission.
Unlocked: 30 Sep 2007 23:57:12
Return
50Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 29 Sep 2007 03:53:10
Mythic
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 29 Sep 2007 03:09:36
The Key
40Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 29 Sep 2007 03:08:05
Iron
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 28 Sep 2007 00:37:29
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Unlocked: 28 Sep 2007 00:24:07
Black Eye
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 27 Sep 2007 23:51:41
Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Unlocked: 27 Sep 2007 23:42:09
Graduate
10Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
Unlocked: 26 Sep 2007 23:40:30
MVP
5Earn the MVP in any ranked playlist (Online).
Unlocked: 26 Sep 2007 04:00:54
Cleansing
30Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2007 18:25:15
Assault
30Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2007 18:00:26
The Road
20Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2007 17:32:08
Holdout
20Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2007 16:54:03
Landfall
20Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 25 Sep 2007 16:09:15
On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Unlocked: 26 Apr 2009 04:06:52
Flag Dropped
25On a Legendary map, get 2 flag carrier kills during any ranked or social match.
Unlocked: 24 Sep 2008 04:15:55
Defend This
50On a Legendary map, get a flag melee kill during any ranked or social match.
Unlocked: 24 Sep 2008 04:07:42
Road Rage
25On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Unlocked: 24 Sep 2008 04:06:02
On a Legendary map, get a Splatter Spree during any ranked or social match.
Unlocked: 24 Sep 2008 03:44:11
On a Legendary map, get two Double Kills during any ranked or social match.
Unlocked: 24 Sep 2008 03:32:10
On a Legendary map, get 3 assassinations during any ranked or social match.
Unlocked: 24 Sep 2008 03:31:58
Post Mortem
25On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Unlocked: 02 Aug 2010 04:37:41
On a Mythic map, get a Bulltrue medal during any ranked or social match.
Unlocked: 28 Dec 2009 05:22:24
On a Mythic map, kill 2 Zombies during any ranked or social match.
Unlocked: 27 Dec 2009 03:50:47
On a Mythic map, infect 2 humans during any ranked or social match.
Unlocked: 27 Dec 2009 03:49:09
Tank Dropper
25On any Mythic map, get a kill on another player while in monitor mode.
Unlocked: 14 Nov 2009 05:33:15
On Sandbox, find the hidden skull.
Unlocked: 26 Apr 2009 04:30:15
On Orbital, find the hidden skull.
Unlocked: 26 Apr 2009 04:21:58
On Assembly, find the hidden skull.
Unlocked: 26 Apr 2009 04:16:17
Killtacular
25On a Mythic map, get a Killtacular during any ranked or social match.
Unlocked: 26 Apr 2009 04:09:04
On a Mythic map, get a Perfection medal during any ranked or social match.
Unlocked: 26 Apr 2009 03:12:56
On a Mythic map, get an Extermination during any ranked or social match.
Unlocked: 26 Apr 2009 03:07:26
Hammer Time
25On Assembly, get 5 Hammer kills during any ranked or social match.
Unlocked: 26 Apr 2009 03:05:15
On a Mythic map, get a Killjoy medal during any ranked or social match.
Unlocked: 10 Apr 2009 01:20:11
On Heretic, get a Sword Spree during any ranked or social match.
Unlocked: 28 Dec 2009 05:33:22
Ghost Patrol
25On Longshore, get 3 kills with a Ghost during any ranked or social match.
Unlocked: 28 Dec 2009 05:16:14
Pull
25On Citadel, get a Shotgun Spree during any ranked or social match.
Unlocked: 28 Dec 2009 05:07:33
On Citadel, find the hidden skull.
Unlocked: 14 Nov 2009 05:44:56
On Longshore, find the hidden skull.
Unlocked: 14 Nov 2009 05:41:14
On Heretic, find the hidden skull.
Unlocked: 14 Nov 2009 05:38:44
Get to the rank of Lieutenant in any playlist in the new EXP progression system.
Unlocked: 08 Jul 2014 03:28:43
Find all the hidden skulls on the Mythic maps.
Unlocked: 14 Nov 2009 05:44:58
After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
Unlocked: 01 Sep 2009 05:02:31
Enter into any ranked or social playlist with 7 EXP on the 7th of the month.
Unlocked: 08 Oct 2008 04:26:47