Landfall
20
Finish the first mission of the Campaign on Normal, Heroic, or Legendary.
Holdout
20
Finish the second mission of the Campaign on Normal, Heroic, or Legendary.
Graduate
10
Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
The Road
20
Finish the third mission of the Campaign on Normal, Heroic, or Legendary.
Assault
30
Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary.
Cleansing
30
Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary.
Refuge
30
Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary.
Last Stand
40
Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary.
The Key
40
Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary.
Fear the Pink Mist
5
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
Return
50
Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
UNSC Spartan
15
Earn your Sergeant rating to be recognized as a true Spartan (Online).
Campaign Complete: Normal
125
Finish the Campaign on Normal.
MVP
5
Earn the MVP in any ranked playlist (Online).
Used Car Salesman
5
Destroy a vehicle that has three enemies in it in a ranked playlist or in campaign.
Up Close and Personal
5
Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online).
Spartan Officer
25
Advance to the Spartan Officer ranks (Online).
Black Eye
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Iron
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tough Luck
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Thunderstorm
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Fog
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Mythic
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Campaign Complete: Heroic
125
Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
Famine
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Catch
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Tilt
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Too Close to the Sun
5
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Headshot Honcho
5
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Triple Kill
5
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Campaign Complete: Legendary
125
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Lee R Wilson Memorial
5
Score 5 grenade sticks in any ranked free for all playlist (Online).
Killing Frenzy
5
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Guerilla
10
Score over 15,000 points in the Campaign meta-game on the first mission.
We’re in for some Chop
5
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Demon
10
Score over 15,000 points in the Campaign meta-game on the second mission.
Marathon Man
40
Locate and access all Terminals in the Campaign.
Maybe Next Time Buddy
5
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Steppin' Razor
5
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Askar
10
Score over 15,000 points in the Campaign meta-game on the fourth mission.
Mongoose Mowdown
5
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Exterminator
10
Score over 15,000 points in the Campaign meta-game on the fifth mission.
Cavalier
10
Score over 15,000 points in the Campaign meta-game on the third mission.
Two for One
5
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Overkill
5
Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Ranger
10
Score over 50,000 points in the Campaign meta-game on the sixth mission.
Vanguard
10
Score over 50,000 points in the Campaign meta-game on the seventh mission.
Reclaimer
10
Score over 15,000 points in the Campaign meta-game on the final mission.
Orpheus
10
Score over 15,000 points in the Campaign meta-game on the eighth mission.