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