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