| Achievement | How to unlock
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| - Completed every co-op Mission on Heroic difficulty.
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- Bringing in the Big Guns (10 points)
| - Called in a REQ that costs 5 Energy or more.
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- Castle Crasher (20 points)
| - Completed 5 matchmade games of Strongholds.
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- Conspiracy Theory (10 points)
| - Found and claimed one piece of Intel.
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| - Completed 3 matchmade games of Warzone.
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- Death from Above (10 points)
| - Killed a Grunt and smashed a grate with a Ground Pound in Battle of Sunaion.
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| - Simultaneously destroyed 2 cores in Guardians on Heroic difficulty.
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- Emergency Boarding Procedures (10 points)
| - Escaped the doomed Kraken by jumping onto a Phaeton piloted by a Spartan.
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- Enemy of my Enemy (10 points)
| - Helped the Elite General charge the hill in Osiris on Heroic difficulty.
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| - Finished Evacuation within 18:00 without dying on Heroic difficulty.
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| - Completed 5 matchmade games of Capture the Flag.
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- Forging a Legend (60 points)
| - Completed every Mission of the game on Legendary difficulty.
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| - Created and saved a Custom Game.
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- Go for the Gold (10 points)
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- Going the Distance (10 points)
| - Completed Glassed without entering a vehicle.
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| - Found and claimed a Skull.
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| - Found and claimed all Skulls.
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| - Completed The Breaking on Legendary difficulty without the entire fireteam dying.
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| - Completed every Mission of the game on Heroic difficulty.
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- Hunt the Truth (40 points)
| - Found and claimed all Intel.
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- I Thought I'd Lost You (10 points)
| - Escaped the Hunters in the lab and fought them in the hangar in Blue Team.
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| - Used a Ground Pound on an exterior power core in Guardians on Heroic difficulty.
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- Into the Fire (10 points)
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- Kraken Lackin' (10 points)
| - Completed Enemy Lines without destroying a Kraken turret.
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| - Completed every Mission of the game on Normal difficulty.
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| - Completed every Mission of the game by yourself on Legendary difficulty.
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- Make Your Mark (10 points)
| - Changed your Service Tag in the Spartan Hub.
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| - Teamed up in a vehicle to kill 30 enemies in Unconfirmed co-op.
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| - Completed any Mission with 3+ Skulls active on Heroic difficulty.
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- No Knock Raid (10 points)
| - Destroyed 10 walls or floors in Swords of Sanghelios.
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| - Destroyed the Phantom at the Covenant camp in Reunion on Heroic difficulty.
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- Off to the Races (20 points)
| - Completed 5 matchmade games of Breakout.
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| - Simultaneously assassinated two Elites in Blue Team co-op.
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| - Completed any co-op Mission on Heroic difficulty.
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- Preying Mantis (10 points)
| - Completed Swords of Sanghelios co-op with both Mantises on Heroic difficulty.
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| - Simultaneously killed two Wardens in The Breaking on Heroic difficulty.
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- Raise Your Banner (10 points)
| - Changed your Emblem in the Spartan Hub.
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- Rolling Thunder (10 points)
| - Operated four different vehicles at once in Mission 13 on Heroic difficulty.
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- Roots of the Earth (10 points)
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| - Kept 6 miners alive at the elevator in Evacuation on Heroic difficulty.
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- Shoot from the Hip (10 points)
| - Completed Glassed without any players using Smart-Link.
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- Spartan Decimation (20 points)
| - Completed 5 matchmade games of Slayer.
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- Stolen Gauntlet (10 points)
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| - Traversed the canyon without a Phaeton in Reunion on Heroic difficulty.
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- Tank Still Beats Everything (10 points)
| - Finished the 13th mission without losing the Scorpion on Legendary difficulty.
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- Together Again (10 points)
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- Top of the Food Chain (30 points)
| - Killed a Legendary Boss in Warzone.
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- Valor Recognized (20 points)
| - Qualified for a Competitive Skill Rating.
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- Waiting on You (10 points)
| - Killed an enemy that's had its armor repaired in Unconfirmed.
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| - Won a match on all three original Warzone maps.
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- Worms Don't Surf (10 points)
| - Knocked two Hunters into the ocean during the Battle of Sunaion.
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| - Changed your Spartan's gear in the Spartan Hub.
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- Your Team is Your Weapon (10 points)
| - Commanded your team of Spartans in Osiris.
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