A 343 közösségi koordinátora, Jessica Shea elmondta: az achievementek kialakítása nehezebb, mint amilyennek látszik, a csapatnak ugyanis két irányelvhez kellett magát tartani. Az egyik az volt, hogy a megfelelő achievementekkel kitolják a játék élettartamát, tovább növelve az újrajátszhatósági faktort, valamint a hagyományoknak megfelelően kellően idióta neveket is ki kellett találniuk. Ránézésre azt hiszem, sikerült mindkét célt teljesíteniük...

  • Dawn - Complete Mission 1 on any difficulty - (10 Points)
  • Requiem - Complete Mission 2 on any difficulty - (10 Points)
  • Forerunner - Complete Mission 3 on any difficulty - (10 Points)
  • Infinity - Complete Mission 4 on any difficulty - (10 Points)
  • Reclaimer - Complete Mission 5 on any difficulty - (10 Points)
  • Shutdown - Complete Mission 6 on any difficulty - (10 Points)
  • Composer - Complete Mission 7 on any difficulty - (10 Points)
  • Midnight - Complete Mission 8 on any difficulty - (10 Points)
  • Wake up John - Complete the Campaign on Normal or harder - (20 Points)
  • I Need a Hero - Complete the Campaign on Heroic or harder - (40 Points)
  • The Legend of 117 - Complete the Campaign on Legendary difficulty - (70 Points)
  • Lone Wolf Legend - Complete the Campaign solo on Legendary difficulty - (90 Points)
  • Skullduggery - Complete any Campaign mission with 3 or more Skulls on Heroic or harder - (15 Points)
  • Bropocalypse - Complete any Campaign mission co-operatively on Heroic or harder - (10 Points)
  • Bromageddon - Complete the Campaign co-operatively on Heroic or harder - (40 Points)
  • Contact the Domain - Find a Terminal in the Campaign - (10 Points)
  • Terminus - Find all of the Terminals in the Campaign - (50 Points)
  • Digging up the Past - In Mission 1, find and access Chief's record - (20 Points)
  • Midnight Launch - In Mission 2, get significant air in the Warthog at midnight - (20 Points)
  • This is my Rifle, this is my Gun - In Mission 3, carry a UNSC weapon all the way through on Heroic or harder - (20 Points)
  • Bros to the Close - Make it through Mission 4 without one preventable Marine death on Heroic or harder - (20 Points)
  • Mortardom - In Mission 5, hijack a Wraith and use it to kill at least four enemy Wraiths on Heroic or harder - (20 Points)
  • Explore the Floor - In Mission 6, trick or force a Hunter to fall to his demise - (20 Points)
  • Give Him the Stick - In Mission 7 in solo Campaign, take out both Hunters using only the Sticky Detonator - (20 Points)
  • Chief, Smash! - In Mission 8, kill 3 Crawlers in one hit with the Gravity Hammer - (20 Points)
  • Not Some Recruit Anymore - Rank up your Spartan-IV to SR-5 - (15 Points)
  • Movin' on Up - Rank up your Spartan-IV to SR-20 - (30 Points)
  • I ♥ Red vs Blue - Win 5 War Games matchmaking matches - (10 Points)
  • The Dongblainer - Win 20 War Games matchmaking matches - (30 Points)
  • Operation Completion - Complete a Spartan Ops Mission on any difficulty - (15 Points)
  • A Legendary Episode - Complete all chapters in Spartan Ops Episode 1 on Legendary difficulty - (40 Points)
  • Dedicated to Crimson - Complete all chapters in the first 5 episodes of Spartan Ops on any difficulty - (80 Points)
  • Crimson Alone - Complete a Spartan Ops chapter solo on Legendary - (20 Points)
  • Roses vs Violets - Find one of the RvB Easter Eggs in Spartan Ops - (20 Points)
  • Rescue Ranger - Save at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder - (20 Points)
  • Knight in White Assassination - Assassinate a Knight in any Spartan Ops mission - (20 Points)
  • What Power Outage? - Complete Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder - (20 Points)
  • No Easy Way Out - In Ch 1, Ep 5 of Spartan Ops survive all enemy waves during the defense on Normal or harder - (20 Points)
  • The Challenged - Complete a Challenge - (10 Points)
  • The Challenger - Complete 25 Challenges - (20 Points)
  • Armorer - Change your Spartan's armor in the Spartan Armor card - (5 Points)
  • Badge - Change your Emblem in the Spartan ID card - (5 Points)
  • PWND - Change your Service Tag in the Spartan ID card - (5 Points)
  • What a Poser! - Change your Spartan's pose in the Spartan ID card - (5 Points)
  • The Cartographer - Create and save a Custom Map in Forge - (5 Points)
  • Game Changer - Create and save a Custom Game type in War Games - (5 Points)
  • Snapshot! - Save a Screenshot from the Theater - (5 Points)
  • The Director - Save a Film Clip from the Theater - (5 Points)
  • Sharing is Caring - Upload a File to your File Share - (5 Points)