Scored over 200,000 points in Firefight on Windward.
Scored over 200,000 points in Firefight on Rally Point.
Scored over 200,000 points in Firefight on Crater.
Scored over 200,000 points in Firefight on Last Exit.
Scored over 200,000 points in Firefight on Chasm Ten.
Killed 10 Engineers in the city at night, alone or with another ODST.
Found all Audio Logs, alone or with another ODST.
Killed no Engineers in the city at night during entire campaign, alone or with another ODST.
Scored over 200,000 points in Firefight on Lost Platoon.
In Firefight, on any mission, passed the 4th Set on 4-player Heroic LIVE co-op.
Found 15 Audio Logs, alone or with another ODST.
Completed Legendary and unlocked the Dare character in Firefight.
Completed the Campaign on Heroic difficulty.
Completed Highway on 4-player Legendary LIVE co-op, with Iron, and no 'Hog or Scorpion.
Killed 10 enemies with the Flamethrower on Data Hive.
Got 10 Rocket kills on Kizingo Boulevard.
Completed the Campaign on Normal difficulty.
Completed Coastal Highway and unlocked the Last Exit Firefight mission.
Scored over 200,000 points in Firefight on Alpha Site.
In Firefight, finished a full round without killing a single enemy.
Finished any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.
Completed Data Hive and unlocked the Chasm Ten Firefight mission.
Completed Kikowani Station on Normal, Heroic, or Legendary.
Completed NMPD HQ and unlocked the Romeo character in Firefight.
Got 15 headshot kills on NMPD HQ.
Completed ONI Alpha Site and unlocked the Alpha Site Firefight mission.
Got 10 Spartan Laser kills on ONI Alpha Site.
Finished any level with at least one Skull activated.
Completed Kizingo Blvd. and unlocked the Mickey character in Firefight.
Completed Uplift Reserve and unlocked the Dutch character in Firefight.
Killed all Wraiths in Uplift Reserve.
Completed Tayari Plaza and unlocked the Buck character in Firefight.
Plasma Pistol Overcharged and quickly killed 10 Brutes.
Stunned a vehicle with an overcharged plasma pistol and quickly killed the driver.
Scored over 200,000 points in Firefight on Security Zone.
Got 10 Needler supercombine kills on any covenant.
Found the first Medical Kiosk and healed yourself.
Found the final clue unraveling the mystery, alone or with another ODST.
Traded weapons with a fellow character.
Got 5 sticky grenade kills in any level.
Found the 3rd clue unraveling the mystery, alone or with another ODST.
Found 3 Audio Logs, alone or with another ODST.
Found the first Audio Log.
Got 10 automag headshot kills in any level.
Found the first clue unraveling the mystery.
Killed 5 enemies while using VISR mode.
Accessed and downloaded the city map to your VISR.
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