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.
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.
Graduate
10
Earn 5 EXP or finish 10 games to complete the requirements for basic training (Online).
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.
Fear the Pink Mist
5
Kill 5 enemies with the needler in a ranked free for all playlist or in campaign.
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.
Return
50
Finish the final mission of the Campaign on Normal, Heroic, or Legendary.
Campaign Complete: Normal
125
Finish the Campaign on Normal.
UNSC Spartan
15
Earn your Sergeant rating to be recognized as a true Spartan (Online).
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).
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.
Campaign Complete: Heroic
125
Finish the Campaign on Heroic (unlocks achievement for Normal, if not earned).
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.
Thunderstorm
10
Find and claim this skull when playing on Normal, Heroic or Legendary difficulty.
Spartan Officer
25
Advance to the Spartan Officer ranks (Online).
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.
Headshot Honcho
5
Kill 10 enemies with headshots in a ranked free for all playlist or in campaign.
Too Close to the Sun
5
Destroy an enemy banshee with the spartan laser or missile pod in a ranked playlist or in campaign.
Campaign Complete: Legendary
125
Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned).
Triple Kill
5
Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Lee R Wilson Memorial
5
Score 5 grenade sticks in any ranked free for all playlist (Online).
Guerilla
10
Score over 15,000 points in the Campaign meta-game on the first mission.
Marathon Man
40
Locate and access all Terminals in the Campaign.
Killing Frenzy
5
Kill 10 enemies without dying in any ranked free for all playlist (Online).
Demon
10
Score over 15,000 points in the Campaign meta-game on the second mission.
We’re in for some Chop
5
Destroy an enemy vehicle with equipment in a ranked playlist or in campaign.
Double Double
25
On a Legendary map, get two Double Kills during any ranked or social match.
Askar
10
Score over 15,000 points in the Campaign meta-game on the fourth mission.
Steppin' Razor
5
Score a Triple Kill with the sword in a ranked free for all playlist (Online).
Mongoose Mowdown
5
Splatter an enemy with the mongoose in a ranked free for all playlist (Online).
Cavalier
10
Score over 15,000 points in the Campaign meta-game on the third mission.
Exterminator
10
Score over 15,000 points in the Campaign meta-game on the fifth mission.
Maybe Next Time Buddy
5
Board the same vehicle within 10 seconds after being boarded in any free for all playlist (Online).
Awww, Too Bad
25
On a Mythic map, get a Killjoy medal during any ranked or social match.
Ranger
10
Score over 50,000 points in the Campaign meta-game on the sixth mission.
Overkill
5
Kill 4 enemies within 4 seconds of one another in a ranked free for all playlist (Online).
Assembly Skull
25
On Assembly, find the hidden skull.
Two for One
5
Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online).
Orbital Skull
25
On Orbital, find the hidden skull.
Sandbox Skull
25
On Sandbox, find the hidden skull.
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.
Came… From… Behind
50
On a Legendary map, get 3 assassinations during any ranked or social match.
Orpheus
10
Score over 15,000 points in the Campaign meta-game on the eighth mission.
Tank Dropper
25
On any Mythic map, get a kill on another player while in monitor mode.
Citadel Skull
25
On Citadel, find the hidden skull.
Heretic Skull
25
On Heretic, find the hidden skull.
Longshore Skull
25
On Longshore, find the hidden skull.
Vidmaster Challenge: Brainpan
25
Find all the hidden skulls on the Mythic maps.
Flag Dropped
25
On a Legendary map, get 2 flag carrier kills during any ranked or social match.
… Get the Horns
25
On a Mythic map, get a Bulltrue medal during any ranked or social match.
Vidmaster Challenge: 7 on 7
0
Enter into any ranked or social playlist with 7 EXP on the 7th of the month.
Road Rage
25
On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match.
Defend This
50
On a Legendary map, get a flag melee kill during any ranked or social match.
Vidmaster Challenge: Lightswitch
0
Get to the rank of Lieutenant in any playlist in the new EXP progression system.
Zombie Repeller
25
On a Mythic map, kill 2 Zombies during any ranked or social match.
Delicious Brains
25
On a Mythic map, infect 2 humans during any ranked or social match.
Alas, Poor Yorick
25
On a Legendary map, get 3 Oddball melee kills during any ranked or social match.
Look Both Ways
50
On a Legendary map, get a Splatter Spree during any ranked or social match.
Hammer Time
25
On Assembly, get 5 Hammer kills during any ranked or social match.
Killtacular
25
On a Mythic map, get a Killtacular during any ranked or social match.
Post Mortem
25
On Orbital, get 2 Death From the Grave medals during any ranked or social match.
Vidmaster Challenge: Annual
0
After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts.
Have Fun Respawning
25
On a Mythic map, get an Extermination during any ranked or social match.
Ghost Patrol
25
On Longshore, get 3 kills with a Ghost during any ranked or social match.
Save This Film
25
On a Mythic map, get a Perfection medal during any ranked or social match.
Blades of Fury
25
On Heretic, get a Sword Spree during any ranked or social match.
Pull
25
On Citadel, get a Shotgun Spree during any ranked or social match.