| Achievement | How to unlock
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| - Found 15 Audio Logs, alone or with another ODST.
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| - Found all Audio Logs, alone or with another ODST.
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- Be Like Marty ( 10 points )
| - In Firefight, finished a full round without killing a single enemy.
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- Boom, Headshot ( 5 points )
| - Got 10 automag headshot kills in any level.
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| - Got 10 Rocket kills on Kizingo Boulevard.
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- Campaign Complete: Legendary ( 100 points )
| - Completed Legendary and unlocked the Dare character in Firefight.
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- Campaign Complete: Heroic ( 100 points )
| - Completed the Campaign on Heroic difficulty.
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- Campaign Complete: Normal ( 100 points )
| - Completed the Campaign on Normal difficulty.
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- Coastal Highway ( 50 points )
| - Completed Coastal Highway and unlocked the Last Exit Firefight mission.
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| - Killed 5 enemies while using VISR mode.
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| - Completed Data Hive and unlocked the Chasm Ten Firefight mission.
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- Dome Inspector ( 5 points )
| - Got 15 headshot kills on NMPD HQ.
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- Ewww, Sticky ( 5 points )
| - Got 5 sticky grenade kills in any level.
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- Firefight: Alpha Site ( 10 points )
| - Scored over 200,000 points in Firefight on Alpha Site.
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- Firefight: Chasm Ten ( 10 points )
| - Scored over 200,000 points in Firefight on Chasm Ten.
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- Firefight: Crater ( 10 points )
| - Scored over 200,000 points in Firefight on Crater.
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- Firefight: Last Exit ( 10 points )
| - Scored over 200,000 points in Firefight on Last Exit.
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- Firefight: Lost Platoon ( 10 points )
| - Scored over 200,000 points in Firefight on Lost Platoon.
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- Firefight: Rally Point ( 10 points )
| - Scored over 200,000 points in Firefight on Rally Point.
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- Firefight: Security Zone ( 10 points )
| - Scored over 200,000 points in Firefight on Security Zone.
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- Firefight: Windward ( 10 points )
| - Scored over 200,000 points in Firefight on Windward.
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- Good Samaritan ( 20 points )
| - Killed no Engineers in the city at night during entire campaign, alone or with another ODST.
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| - Found the 3rd clue unravelling the mystery, alone or with another ODST.
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| - Finished any level with at least one Skull activated.
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| - Found the first Medical Kiosk and healed yourself.
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| - Killed 10 enemies with the Flamethrower on Data Hive.
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- Junior Detective ( 10 points )
| - Found the first clue unravelling the mystery.
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- Kikowani Station ( 30 points )
| - Completed Kikowani Station on Normal, Heroic or Legendary.
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- Kizingo Boulevard ( 30 points )
| - Completed Kizingo Blvd. and unlocked the Mickey character in Firefight.
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- Laser Blaster ( 5 points )
| - Got 10 Spartan Laser kills on ONI Alpha Site.
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| - Found the first Audio Log.
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| - Plasma Pistol Overcharged and quickly killed 10 Brutes.
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- Naughty Naughty ( 5 points )
| - Killed 10 Engineers in the city at night, alone or with another ODST.
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| - Completed NMPD HQ and unlocked the Romeo character in Firefight.
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- ONI Alpha Site ( 30 points )
| - Completed ONI Alpha Site and unlocked the Alpha Site Firefight mission.
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- Pink and Deadly ( 5 points )
| - Got 10 Needler supercombine kills on any covenant.
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| - Stunned a vehicle with an overcharged plasma pistol and quickly killed the driver.
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- Super Sleuth ( 10 points )
| - Found the final clue unravelling the mystery, alone or with another ODST.
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- Tayari Plaza ( 30 points )
| - Completed Tayari Plaza and unlocked the Buck character in Firefight.
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| - Accessed and downloaded the city map to your VISR.
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- Trading Down ( 5 points )
| - Traded weapons with a fellow character
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| - Found 3 Audio Logs, alone or with another ODST.
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- Uplift Reserve ( 30 points )
| - Completed Uplift Reserve and unlocked the Dutch character in Firefight.
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- Vidmaster Challenge: Classic ( 25 points )
| - Finished any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.
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- Vidmaster Challenge: Deja vu ( 25 points )
| - Completed Highway on 4-player Legendary LIVE co-op, with Iron, and no Hog or Scorpion.
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- Vidmaster Challenge: Endure ( 25 points )
| - In Firefight, on any mission, passed the 4th Set on 4-player Heroic LIVE co-op.
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- Wraith Killer ( 5 points )
| - Killed all Wraiths in Uplift Reserve
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