| Achievement | How to unlock
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|---|
| A Peek into the Future (10 points) | Watched Aftermath teaser.
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| All Rounder (10 points) | Won one match in Free For All, Team Deathmatch, and Domination.
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| Blood Brothers (50 points) | Completed all Campaign Chapters in Co-op.
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| Challenge Accepted (5 points) | Completed your first Declassified mission.
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| Death to Locust (10 points) | Killed with all classes of COG in Overrun or Survival.
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| Death to the COG (10 points) | Killed with all classes of Locust in Overrun.
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| Determined (10 points) | Completed all Campaign Chapters on at least Casual difficulty.
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| Dominator (10 points) | Won one match on every map in Domination.
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| Fearless (50 points) | Achieved level 50 a second time and chose to re-up for another tour.
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| Friends (10 points) | Completed Aftermath.
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| Globe Trotter (10 points) | Won a match on every map in all Versus modes.
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| I Told You (10 points) | Completed Downtown Halvo Bay.
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| Iron Fist (25 points) | Completed all Campaign Chapters on at least Hardcore difficulty.
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| Jack of All Trades (10 points) | Won 10 matches of Overrun.
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| Let's Do This (50 points) | Achieved level 50 and chose to re-up for another tour of duty.
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| Level 10 (10 points) | Reached level 10.
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| Level 20 (10 points) | Reached level 20.
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| Level 30 (15 points) | Reached level 30.
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| Level 40 (25 points) | Reached level 40.
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| Level 5 (5 points) | Reached level 5.
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| Level 50 (25 points) | Reached level 50.
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| Lion Heart (50 points) | Completed all Campaign Chapters on Insane difficulty.
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| Never Forgotten (10 points) | Recovered 10 COG Tags during the Campaign.
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| Never Give Up (10 points) | Completed at least 20 Declassified missions.
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| Open Arms (10 points) | Completed Halvo Bay Military Academy.
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| Overran (10 points) | Won one match on every map in Overrun.
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| Party People (10 points) | Played any section in 4 player Co-Op.
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| Proud Wearer (5 points) | Equipped your first Medal.
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| Quality Soldiering (50 points) | Completed all Declassified missions.
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| Ready for War (20 points) | Earned at least one Onyx medal.
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| Respect for the Fallen (20 points) | Recovered all 48 COG Tags during the Campaign.
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| Ribbon Master (10 points) | Earned 3 unique Ribbons in any section.
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| Rising Star (10 points) | Attained 50 Stars on at least Casual Difficulty.
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| Roaming Free (10 points) | Won one match on every map in Free For All.
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| Seriously Judgmental (75 points) | Completed all Declassified Missions on Insane difficulty.
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| Shooting Star (20 points) | Attained 75 Stars on at least Normal Difficulty.
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| Star Struck (50 points) | Attained 100 Stars on at least Hardcore Difficulty.
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| Steel Nerves (10 points) | Completed all Campaign Chapters on at least Normal difficulty.
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| Superstar (50 points) | Attained all Stars on Insane Difficulty.
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| Survivor (10 points) | Completed wave 10 on all maps in Survival mode.
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| Sybarite (50 points) | Earned the Onyx "War Supporter" medal.
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| Take Back This City (10 points) | Completed Onyx Point.
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| Team Leader (10 points) | Won 10 rounds of Team Deathmatch.
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| Team On Tour (10 points) | Won one match on every map in Team Deathmatch.
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| The Aftermath (20 points) | Unlocked Aftermath.
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| The Real Thing (10 points) | Completed Seahorse Hills.
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| They Called Him Karn (10 points) | Completed Museum Of Military Glory.
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| This One's Not Over (10 points) | Completed Courthouse.
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| Unstoppable (50 points) | Achieved level 50 a third time and chose to re-up for another tour.
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| Veteran Remembrance (10 points) | Recovered 25 COG Tags during the Campaign.
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