Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
Unlocked: 23 Mar 2019 20:11:07
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Unlocked: 23 Mar 2019 20:11:07
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Unlocked: 23 Mar 2019 19:09:46
Fog
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 23 Mar 2019 18:27:03
Tough Luck
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 23 Mar 2019 17:48:46
UNSC Spartan
15Earn your Sergeant rating to be recognized as a true Spartan (Online).
Unlocked: 05 Jul 2016 03:05:54
Graduate
10Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
Unlocked: 29 May 2016 02:44:22
Last Stand
40Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 20 May 2016 00:29:26
Finish the Campaign on Normal.
Unlocked: 20 May 2016 00:29:26
Thunderstorm
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 19 May 2016 23:47:11
The Key
40Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 19 May 2016 23:17:16
Return
50Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 01 Mar 2016 00:34:14
Black Eye
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: 19 Oct 2014 19:37:29
MVP
5Earn the MVP in any ranked playlist (Online).
Unlocked: 19 Oct 2014 18:46:44
The Road
20Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 08 Jan 2013 21:37:45
Landfall
20Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 07 Jan 2013 22:56:53
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Unlocked: 28 Jul 2010 15:24:02
Cleansing
30Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 11 Jun 2010 16:23:42
Assault
30Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: 11 Jun 2010 15:53:02
Holdout
20Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: Offline
Refuge
30Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Unlocked: Offline
Mythic
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Unlocked: Offline
Iron
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Catch
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Famine
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tilt
10Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Advance to the Spartan Officer ranks (Online).
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Overkill
5Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Score 5 grenade sticks in any ranked free for all playlist (Online).
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Marathon Man
40Locate and access all Terminals in the Campaign.
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Guerilla
10Score over 15,000 points in the Campaign meta-game on the first mission.
Demon
10Score over 15,000 points in the Campaign meta-game on the second mission.
Cavalier
10Score over 15,000 points in the Campaign meta-game on the third mission.
Askar
10Score over 15,000 points in the Campaign meta-game on the fourth mission.
Exterminator
10Score over 15,000 points in the Campaign meta-game on the fifth mission.
Ranger
10Score over 50,000 points in the Campaign meta-game on the sixth mission.
Vanguard
10Score over 50,000 points in the Campaign meta-game on the seventh mission.
Orpheus
10Score over 15,000 points in the Campaign meta-game on the eighth mission.
Reclaimer
10Score over 15,000 points in the Campaign meta-game on the final mission.
Flag Dropped
25On a Legendary map, get 2 flag carrier kills during any ranked or social match.
Unlocked: 05 Jul 2016 02:43:39
Defend This
50On a Legendary map, get a flag melee kill during any ranked or social match.
Unlocked: 05 Jul 2016 02:42:19
On a Legendary map, get a Splatter Spree during any ranked or social match.
Unlocked: 29 May 2016 02:09:52
Road Rage
25On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Unlocked: 29 May 2016 02:07:42
On a Legendary map, get 3 assassinations during any ranked or social match.
Unlocked: 29 May 2016 01:48:57
On a Legendary map, get two Double Kills during any ranked or social match.
Unlocked: 29 May 2016 01:48:07
On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Unlocked: 29 May 2016 01:47:02
On a Mythic map, kill 2 Zombies during any ranked or social match.
Unlocked: 05 Jul 2016 02:24:50
On a Mythic map, infect 2 humans during any ranked or social match.
Unlocked: 05 Jul 2016 02:13:45
Tank Dropper
25On any Mythic map, get a kill on another player while in monitor mode.
Unlocked: 29 May 2016 03:03:57
Post Mortem
25On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Unlocked: 29 May 2016 02:48:02
On a Mythic map, get a Bulltrue medal during any ranked or social match.
Unlocked: 29 May 2016 02:32:12
On a Mythic map, get a Perfection medal during any ranked or social match.
Unlocked: 29 May 2016 02:15:42
On a Mythic map, get an Extermination during any ranked or social match.
Unlocked: 29 May 2016 02:11:52
On a Mythic map, get a Killjoy medal during any ranked or social match.
Unlocked: 29 May 2016 02:02:32
Hammer Time
25On Assembly, get 5 Hammer kills during any ranked or social match.
Unlocked: 29 May 2016 01:50:15
Killtacular
25On a Mythic map, get a Killtacular during any ranked or social match.
Unlocked: 29 May 2016 01:48:07
On Sandbox, find the hidden skull.
Unlocked: 11 Jan 2016 22:32:44
On Orbital, find the hidden skull.
Unlocked: 11 Jan 2016 21:51:53
On Assembly, find the hidden skull.
Unlocked: 11 Jan 2016 21:44:17
Pull
25On Citadel, get a Shotgun Spree during any ranked or social match.
Unlocked: 29 May 2016 02:37:32
On Heretic, get a Sword Spree during any ranked or social match.
Unlocked: 29 May 2016 02:27:42
On Longshore, find the hidden skull.
Unlocked: 11 Jan 2016 21:50:28
On Heretic, find the hidden skull.
Unlocked: 11 Jan 2016 21:49:26
On Citadel, find the hidden skull.
Unlocked: 11 Jan 2016 21:47:43
Ghost Patrol
25On Longshore, get 3 kills with a Ghost during any ranked or social match.
After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
Unlocked: 18 Jun 2016 04:54:54
Find all the hidden skulls on the Mythic maps.
Unlocked: 11 Jan 2016 22:32:45
Get to the rank of Lieutenant in any playlist in the new EXP progression system.
Enter into any ranked or social playlist with 7 EXP on the 7th of the month.