| 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.
|
| 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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