| Achievement | How to unlock
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| Ashes to Ashes (10 points) | In Castle DLC Matchmaking, disintegrate 6 enemies using Forerunner weapons.
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| Beating up the Beat (30 points) | In Castle DLC Matchmaking, perform 5 melee kills in a single match.
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| Dodge This! (20 points) | In Castle DLC Matchmaking, get two direct Spartan Laser kills in one match.
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| Hello Nurse! (30 points) | In Castle DLC Matchmaking, heal a near-death teammate with Regen Field 5 times.
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| Outta My Way! (40 points) | In Castle DLC Matchmaking, kill 5 enemies during a match by running them over.
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| Scrapyard (30 points) | In Castle DLC Matchmaking, destroy 2 vehicles during a single game.
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| Sight Seeing (20 points) | In Castle DLC Matchmaking, complete a match in any mode for each Castle map
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| That Won't Save You (30 points) | In Castle DLC Matchmaking, assassinate an enemy who is using a Hardlight Shield.
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| What is Yours is Also Mine (40 points) | In Castle DLC Matchmaking, disable a vehicle and then hijack it.
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| Achievement | How to unlock
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|---|
| Can't Catch Me (20 points) | In matchmaking, score a goal in Ricochet while taking damage with the Resistor active.
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| From Downtown (25 points) | In matchmaking, score by throwing the ball from 30 meters in Ricochet.
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| Got it! (20 points) | In Bullseye DLC matchmaking, acquire the Rocket Launcher at the start of a match on Pitfall.
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| Hat Trick (33 points) | In matchmaking, score three times in one round of Ricochet.
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| Just a Scratch (20 points) | In matchmaking, recover full shields from low health with both Resistor and Recharge active.
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| One Man Army (27 points) | In matchmaking, get four consecutive kills with the Rocket Launcher without dying.
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| Pitchin' a Tent (40 points) | In matchmaking, effectively camp one location without dying for a full 60 seconds.
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| Protect This House (30 points) | In matchmaking, assassinate the ball carrier within five meters of your own goal in Ricochet.
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| Repeat Survivor (25 points) | In matchmaking, survive three vehicle explosions in a row with the Survivor package.
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| Shocking (10 points) | In Bullseye DLC matchmaking, activate both electrical surge systems during a match on Vertigo.
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| Achievement | How to unlock
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|---|
| Bigfoot (20 points) | In Crimson DLC matchmaking, kill 20 enemies using the Mantis' stomp attack.
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| Clay Pigeon (40 points) | In Crimson DLC matchmaking, shoot an enemy who's airborne from a Man Cannon.
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| David and Goliath (20 points) | In Crimson DLC matchmaking, board an enemy Mantis.
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| Now They Fly? (50 points) | In Crimson DLC matchmaking, get a kill while airborne in a Warthog.
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| ODST (30 points) | In Crimson DLC matchmaking, kill a player while airborne from a Man Cannon.
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| Pump Yer Brakes (40 points) | In Crimson DLC matchmaking, score the killing blow on a Mantis.
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| Size is Everything (20 points) | In Crimson DLC matchmaking, kill 20 enemies with a detached Machine Gun Turret.
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| Special Delivery (30 points) | In Crimson DLC matchmaking, kill an enemy with melee when landing from a Man Cannon.
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| Achievement | Description
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|---|
| Bird of Prey (50 points) | In Majestic DLC matchmaking, perform 5 'airsassinations.'
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| Bullet Sponge (30 points) | In Majestic DLC matchmaking, get the 'Close Call' medal twice during one match.
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| Callin' in the Big Guns (40 points) | In Majestic DLC matchmaking, call in 3 ordnance drops during the same game.
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| Clever Girl (10 points) | In Majestic DLC matchmaking, kill 5 enemies while Active Camo is active.
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| Didn't See It Comin' (10 points) | In Majestic DLC matchmaking, assassinate an enemy who's in zoom mode.
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| Flash of Light (30 points) | In Majestic DLC matchmaking, get a Double Kill or higher with one Pulse Grenade.
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| I See You! (10 points) | In Majestic DLC matchmaking, kill 5 enemies while Promethean Vision is active.
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| I Thrust at Thee (20 points) | In Majestic DLC matchmaking, perform a melee kill right after using Thrust Pack.
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| Last Man Grinning (20 points) | In Majestic DLC matchmaking, get 4 kills using the SAW without dying.
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| Pigs Can Fly (30 points) | In Majestic DLC matchmaking, kill 3 enemies while they are using Jet Packs.
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| Achievement | How to unlock
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|---|
| A Legendary Episode (40 points) | Completed all chapters in Spartan Ops Episode 1 on Legendary difficulty.
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| Armorer (5 points) | Changed your Spartan's armor in the Spartan Armor card.
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| Badge (5 points) | Changed your Emblem in the Spartan ID card.
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| Bromageddon (40 points) | Completed the Campaign cooperatively on Heroic or harder.
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| Bropocalypse (10 points) | Completed any Campaign mission cooperatively on Heroic or harder.
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| Bros to the Close (20 points) | Completed mission 4 without one preventable Marine death on Heroic or harder.
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| Chief, Smash! (20 points) | Killed 3 Crawlers in one hit with the Gravity Hammer in mission 8.
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| Composer (10 points) | Completed mission 7 on any difficulty.
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| Contact the Domain (10 points) | Found a Terminal in the Campaign.
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| Crimson Alone (20 points) | Completed a Spartan Ops chapter solo on Legendary.
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| Dawn (10 points) | Completed mission 1 on any difficulty.
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| Dedicated to Crimson (80 points) | Completed all chapters in the first 5 episodes of Spartan Ops on any difficulty.
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| Digging up the Past (20 points) | Found and accessed Chief's record in mission 1.
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| Explore the Floor (20 points) | Tricked or forced a Hunter to fall to his demise in mission 6.
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| Forerunner (10 points) | Completed mission 3 on any difficulty.
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| Game Changer (5 points) | Created and saved a Custom Game type in War Games.
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| Give Him the Stick (20 points) | Took out both Hunters using only the Sticky Detonator in mission 7.
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| Hanging on the Combat Deck (30 points) | Won 20 War Games matchmaking matches.
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| I <3 Red vs Blue (15 points) | Won 5 War Games matchmaking matches.
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| I Need a Hero (40 points) | Completed the Campaign on Heroic or harder.
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| Infinity (10 points) | Completed mission 4 on any difficulty.
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| Knight in White Assassination (20 points) | Assassinated a Knight in any Spartan Ops mission.
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| Lone Wolf Legend (90 points) | Completed the Campaign solo on Legendary difficulty.
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| Midnight (10 points) | Completed mission 8 on any difficulty.
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| Midnight Launch (20 points) | Got significant air in the Warthog at midnight in mission 2.
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| Mortardom (20 points) | Hijacked a Wraith and used it to kill at least four enemy Wraiths in mission 5 on Heroic or harder.
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| Movin' On Up (25 points) | Ranked up your Spartan-IV to SR-20.
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| No Easy Way Out (20 points) | In Ch 1, Ep 5 of Spartan Ops survived the enemy assault during the defense on Normal or harder.
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| No One Left Behind (20 points) | Saved at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder.
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| Not Some Recruit Anymore (15 points) | Ranked up your Spartan-IV to SR-5.
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| Operation Completion (15 points) | Completed a Spartan Ops Mission on any difficulty.
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| PWND (5 points) | Changed your Service Tag in the Spartan ID card.
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| Reclaimer (10 points) | Completed mission 5 on any difficulty.
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| Requiem (10 points) | Completed mission 2 on any difficulty.
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| Roses vs Violets (20 points) | Found one of the RvB Easter Eggs in Spartan Ops.
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| Sharing is Caring (5 points) | Uploaded a File to your File Share.
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| Shutdown (10 points) | Completed mission 6 on any difficulty.
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| Skullduggery (15 points) | Completed any Campaign mission with 3 or more Skulls on Heroic or harder.
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| Snapshot! (5 points) | Saved a Screenshot from the Theater.
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| Terminus (50 points) | Found all of the Terminals in the Campaign.
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| The Cartographer (5 points) | Created and saved a Custom Map in Forge.
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| The Challenged (10 points) | Completed a Challenge.
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| The Challenger (20 points) | Completed 25 Challenges.
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| The Director (5 points) | Saved a Film Clip from the Theater.
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| The Legend of 117 (70 points) | Completed the Campaign on Legendary difficulty.
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| This is my Rifle, This is my Gun (20 points) | Carried a UNSC weapon all the way through mission 3 on Heroic or harder.
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| Wake Up, John (20 points) | Completed the Campaign on Normal or harder.
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| What Power Outage? (20 points) | Completed Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder.
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| What a Poser! (5 points) | Changed your Spartan's pose in the Spartan ID card.
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