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There are 79 achievements with a total of 1750 points available |
| Overkill Kill 4 enemies within 4 seconds of one another 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 | |
| Spartan Officer True veteran of many battles, you are a Spartan Officer. | 25 | |
| Steppin' Razor Score a Triple Kill with the sword in a ranked free for all playlist (Online). | 5 | |
| Two for One Score a Double Kill with a single spartan laser shot in a ranked free for all playlist (Online). | 5 | |
| 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 | |
| Used Car Salesman Destroyed a vehicle that has three enemies in it in a ranked playlist or in campaign. | 5 | |
| Demon Score over 15,000 points in the Campaign meta-game on the second mission. | 10 | |
| Guerilla Score over 15,000 points in the Campaign meta-game on the first mission. | 10 | |
| Vanguard Score over 50,000 points in the Campaign meta-game on the seventh mission. | 10 | |
| Ranger Score over 50,000 points in the Campaign meta-game on the sixth mission. | 10 | |
| Exterminator Score over 15,000 points in the Campaign meta-game on the fifth mission. | 10 | |
| Askar Score over 15,000 points in the Campaign meta-game on the fourth mission. | 10 | |
| Cavalier Score over 15,000 points in the Campaign meta-game on the third mission. | 10 | |
| We’re in for some Chop Destroy an enemy vehicle with equipment in a ranked playlist or in campaign. | 5 | |
| Campaign Complete: Legendary Finish the Campaign on Legendary (unlocks achievements for Normal and Heroic, if not earned). | 125 | |
| Campaign Complete: Heroic Completed the Campaign on Heroic difficulty. | 125 | |
| Campaign Complete: Normal Completed the Campaign on Normal difficulty. | 125 | |
| Return Completed the final mission of the Campaign. | 50 | |
| Marathon Man Locate and access all Terminals in the Campaign. | 40 | |
| Mythic Claimed Mythic skull. | 10 | |
| The Key Completed the eighth mission of the Campaign. | 40 | |
| Tilt Claimed Tilt skull. | 10 | |
| Last Stand Completed the seventh mission of the Campaign. | 40 | |
| Thunderstorm Claimed Thunderstorm skull. | 10 | |
| Refuge Completed the sixth mission of the Campaign. | 30 | |
| Famine Claimed Famine skull. | 10 | |
| Cleansing Completed the fifth mission of the Campaign. | 30 | |
| Fog Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. | 10 | |
| Assault Completed the fourth mission of the Campaign. | 30 | |
| Too Close to the Sun Destroyed a banshee with the spartan laser or missile pod in a ranked playlist or in campaign. | 5 | |
| Catch Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. | 10 | |
| The Road Completed the third mission of the Campaign. | 20 | |
| Tough Luck Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. | 10 | |
| Killing Frenzy Kill 10 enemies without dying in any ranked free for all 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 | |
| Black Eye Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. | 10 | |
| Iron Find and claim this skull when playing on Normal, Heroic or Legendary difficulty. | 10 | |
| Headshot Honcho Kill 10 enemies with headshots in a ranked free for all playlist or in campaign. | 5 | |
| UNSC Spartan Promoted to Sergeant. Proven in combat, you are a Spartan. | 15 | |
| Lee R Wilson Memorial Score 5 grenade sticks in any ranked free for all playlist (Online). | 5 | |
| Triple Kill Kill 3 enemies within 4 seconds of one another in a ranked free for all playlist (Online). | 5 | |
| Holdout Completed the second mission of the Campaign. | 20 | |
| Landfall Completed the first mission of the Campaign. | 20 | |
| Fear the Pink Mist Kill 5 enemies with the needler in a ranked free for all playlist or in campaign. | 5 | |
| MVP Earned the MVP in a ranked playlist. | 5 | |
| Graduate Graduated from basic training. Stick with it to earn your Spartan Insignia. | 10 | |
| Up Close and Personal Kill 5 enemies by melee or assassination in a ranked free for all playlist (Online). | 5 | |
| Vidmaster Challenge: 7 on 7 Enter into any ranked or social playlist with 7 EXP on the 7th of the month. | 0 | |
| Vidmaster Challenge: Lightswitch Get to the rank of Lieutenant in any playlist in the new EXP progression system. | 0 | |
| Vidmaster Challenge: Brainpan Find all the hidden skulls on the Mythic maps. | 25 | |
| Sandbox Skull On Sandbox, find the hidden skull. | 25 | |
| Orbital Skull On Orbital, find the hidden skull. | 25 | |
| Longshore Skull On Longshore, find the hidden skull. | 25 | |
| Heretic Skull On Heretic, find the hidden skull. | 25 | |
| Citadel Skull On Citadel, find the hidden skull. | 25 | |
| Assembly Skull On Assembly, find the hidden skull. | 25 | |
| Tank Dropper On any Mythic map, get a kill on another player while in monitor mode. | 25 | |
| Zombie Repeller On a Mythic map, kill 2 Zombies during any ranked or social match. | 25 | |
| Delicious Brains On a Mythic map, infect 2 humans during any ranked or social match. | 25 | |
| Save This Film On a Mythic map, get a Perfection medal during any ranked or social match. | 25 | |
| Have Fun Respawning On a Mythic map, get an Extermination during any ranked or social match. | 25 | |
| Killtacular On a Mythic map, get a Killtacular during any ranked or social match. | 25 | |
| Awww, Too Bad On a Mythic map, get a Killjoy medal during any ranked or social match. | 25 | |
| … Get the Horns On a Mythic map, get a Bulltrue medal during any ranked or social match. | 25 | |
| Post Mortem On Orbital, get 2 Death From the Grave medals during any ranked or social match. | 25 | |
| Ghost Patrol On Longshore, get 3 kills with a Ghost during any ranked or social match. | 25 | |
| Blades of Fury On Heretic, get a Sword Spree during any ranked or social match. | 25 | |
| Pull On Citadel, get a Shotgun Spree during any ranked or social match. | 25 | |
| Hammer Time On Assembly, get 5 Hammer kills during any ranked or social match. | 25 | |
| Look Both Ways On a Legendary map, get a Splatter Spree during any ranked or social match. | 50 | |
| Road Rage On a Legendary map, get 5 Warthog chaingun kills during any ranked or social match. | 25 | |
| Flag Dropped On a Legendary map, get 2 flag carrier kills during any ranked or social match. | 25 | |
| Defend This On a Legendary map, get a flag melee kill during any ranked or social match. | 50 | |
| Came… From… Behind On a Legendary map, get 3 assassinations during any ranked or social match. | 50 | |
| Alas, Poor Yorick On a Legendary map, get 3 Oddball melee kills during any ranked or social match. | 25 | |
| Double Double On a Legendary map, get two Double Kills during any ranked or social match. | 25 | |
| Vidmaster Challenge: Annual After 9/25/08, complete Halo on 4-player Legendary LIVE co-op, with Iron, and everyone in Ghosts. | 0 | |