| Dawn | 10 |
| Completed mission 1 on any difficulty. | |
| Requiem | 10 |
| Completed mission 2 on any difficulty. | |
| Forerunner | 10 |
| Completed mission 3 on any difficulty. | |
| Infinity | 10 |
| Completed mission 4 on any difficulty. | |
| Reclaimer | 10 |
| Completed mission 5 on any difficulty. | |
| Shutdown | 10 |
| Completed mission 6 on any difficulty. | |
| Composer | 10 |
| Completed mission 7 on any difficulty. | |
| Midnight | 10 |
| Completed mission 8 on any difficulty. | |
| Wake Up, John | 20 |
| Completed the Campaign on Normal or harder. | |
| I Need a Hero | 40 |
| Completed the Campaign on Heroic or harder. | |
| The Legend of 117 | 70 |
| Completed the Campaign on Legendary difficulty. | |
| Lone Wolf Legend | 90 |
| Completed the Campaign solo on Legendary difficulty. | |
| Skullduggery | 15 |
| Completed any Campaign mission with 3 or more Skulls on Heroic or harder. | |
| Bropocalypse | 10 |
| Completed any Campaign mission cooperatively on Heroic or harder. | |
| Contact the Domain | 10 |
| Found a Terminal in the Campaign. | |
| Terminus | 50 |
| Found all of the Terminals in the Campaign. | |
| Digging up the Past | 20 |
| Found and accessed Chief's record in mission 1. | |
| Midnight Launch | 20 |
| Got significant air in the Warthog at midnight in mission 2. | |
| This is my Rifle, This is my Gun | 20 |
| Carried a UNSC weapon all the way through mission 3 on Heroic or harder. | |
| Bros to the Close | 20 |
| Completed mission 4 without one preventable Marine death on Heroic or harder. | |
| Mortardom | 20 |
| Hijacked a Wraith and used it to kill at least four enemy Wraiths in mission 5 on Heroic or harder. | |
| Explore the Floor | 20 |
| Tricked or forced a Hunter to fall to his demise in mission 6. | |
| Give Him the Stick | 20 |
| Took out both Hunters using only the Sticky Detonator in mission 7. | |
| Chief, Smash! | 20 |
| Killed 3 Crawlers in one hit with the Gravity Hammer in mission 8. | |
| Not Some Recruit Anymore | 15 |
| Ranked up your Spartan-IV to SR-5. | |
| Movin' On Up | 25 |
| Ranked up your Spartan-IV to SR-20. | |
| I <3 Red vs Blue | 15 |
| Won 5 War Games matchmaking matches. | |
| Hanging on the Combat Deck | 30 |
| Won 20 War Games matchmaking matches. | |
| Operation Completion | 15 |
| Completed a Spartan Ops Mission on any difficulty. | |
| A Legendary Episode | 40 |
| Completed all chapters in Spartan Ops Episode 1 on Legendary difficulty. | |
| Dedicated to Crimson | 80 |
| Completed all chapters in the first 5 episodes of Spartan Ops on any difficulty. | |
| Crimson Alone | 20 |
| Completed a Spartan Ops chapter solo on Legendary. | |
| Roses vs Violets | 20 |
| Found one of the RvB Easter Eggs in Spartan Ops. | |
| No One Left Behind | 20 |
| Saved at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder. | |
| Knight in White Assassination | 20 |
| Assassinated a Knight in any Spartan Ops mission. | |
| What Power Outage? | 20 |
| Completed Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder. | |
| No Easy Way Out | 20 |
| In Ch 1, Ep 5 of Spartan Ops survived the enemy assault during the defense on Normal or harder. | |
| The Challenged | 10 |
| Completed a Challenge. | |
| The Challenger | 20 |
| Completed 25 Challenges. | |
| Armorer | 5 |
| Changed your Spartan's armor in the Spartan Armor card. | |
| Badge | 5 |
| Changed your Emblem in the Spartan ID card. | |
| PWND | 5 |
| Changed your Service Tag in the Spartan ID card. | |
| What a Poser! | 5 |
| Changed your Spartan's pose in the Spartan ID card. | |
| The Cartographer | 5 |
| Created and saved a Custom Map in Forge. | |
| Game Changer | 5 |
| Created and saved a Custom Game type in War Games. | |
| Snapshot! | 5 |
| Saved a Screenshot from the Theater. | |
| The Director | 5 |
| Saved a Film Clip from the Theater. | |
| Sharing is Caring | 5 |
| Uploaded a File to your File Share. | |
| Bromageddon | 40 |
| Completed the Campaign cooperatively on Heroic or harder. | |
| |
| |
| DLC: Crimson Map Pack |
| Cost: 800 MSP Achievements: 8 Points: 250 |
| |
|
| Now they Fly? | 50 |
| In Crimson DLC matchmaking, get a kill while airborne in a Warthog. | |
| Size is Everything | 20 |
| In Crimson DLC matchmaking, kill 20 enemies with a detached Machine Gun Turret. | |
| ODST | 30 |
| In Crimson DLC matchmaking, kill a player while airborne from a Man Cannon. | |
| Bigfoot | 20 |
| In Crimson DLC matchmaking, kill 20 enemies using the Mantis' stomp attack. | |
| David and Goliath | 20 |
| In Crimson DLC matchmaking, board an enemy Mantis. | |
| Pump Yer Brakes | 40 |
| In Crimson DLC matchmaking, score the killing blow on a Mantis. | |
| Clay Pigeon | 40 |
| In Crimson DLC matchmaking, shoot an enemy who’s airborne from a Man Cannon. | |
| Special Delivery | 30 |
| In Crimson DLC matchmaking, kill an enemy with melee when landing from a Man Cannon. | |
| |
| |
| DLC: Majestic Map Pack |
| Cost: 800 MSP Achievements: 10 Points: 250 |
| |
|
| Didn't See It Comin' | 10 |
| In Majestic DLC matchmaking, assassinate an enemy who's in zoom mode. | |
| Bird of Prey | 50 |
| In Majestic DLC matchmaking, perform 5 'airsassinations.' | |
| Bullet Sponge | 30 |
| In Majestic DLC matchmaking, get the 'Close Call' medal twice during one match. | |
| I See You! | 10 |
| In Majestic DLC matchmaking, kill 5 enemies while Promethean Vision is active. | |
| Clever Girl | 10 |
| In Majestic DLC matchmaking, kill 5 enemies while Active Camo is active. | |
| Flash of Light | 30 |
| In Majestic DLC matchmaking, get a Double Kill or higher with one Pulse Grenade. | |
| Last Man Grinning | 20 |
| In Majestic DLC matchmaking, get 4 kills using the SAW without dying. | |
| Pigs Can Fly | 30 |
| In Majestic DLC matchmaking, kill 3 enemies while they are using Jet Packs | |
| Callin' in the Big Guns | 40 |
| In Majestic DLC matchmaking, call in 3 ordnance drops during the same game. | |
| I Thrust at Thee | 20 |
| In Majestic DLC matchmaking, perform a melee kill right after using Thrust Pack. |
