Coastal Highway

Completed Coastal Highway and unlocked the Last Exit Firefight mission.

All Ears

Found 15 Audio Logs, alone or with another ODST.

Laser Blaster

Got 10 Spartan Laser kills on ONI Alpha Site.

Data Hive

Completed Data Hive and unlocked the Chasm Ten Firefight mission.

Campaign Complete: Normal

Completed the Campaign on Normal difficulty.

Dome Inspector

Got 15 headshot kills on NMPD HQ.

Kikowani Station

Completed Kikowani Station on Normal, Heroic, or Legendary.

Trading Down

Traded weapons with a fellow character.

Tuned In

Found 3 Audio Logs, alone or with another ODST.

Both Tubes

Got 10 Rocket kills on Kizingo Boulevard.

Junior Detective

Found the first clue unraveling the mystery.

NMPD HQ

Completed NMPD HQ and unlocked the Romeo character in Firefight.

ONI Alpha Site

Completed ONI Alpha Site and unlocked the Alpha Site Firefight mission.

Ewww, Sticky

Got 5 sticky grenade kills in any level.

Listener

Found the first Audio Log.

Boom, Headshot

Got 10 automag headshot kills in any level.

Tayari Plaza

Completed Tayari Plaza and unlocked the Buck character in Firefight.

Tourist

Accessed and downloaded the city map to your VISR.

Super Sleuth

Found the final clue unraveling the mystery, alone or with another ODST.

Kizingo Boulevard

Completed Kizingo Blvd. and unlocked the Mickey character in Firefight.

Uplift Reserve

Completed Uplift Reserve and unlocked the Dutch character in Firefight.

Heal Up

Found the first Medical Kiosk and healed yourself.

I Like Fire

Killed 10 enemies with the Flamethrower on Data Hive.

Gumshoe

Found the 3rd clue unraveling the mystery, alone or with another ODST.

Dark Times

Killed 5 enemies while using VISR mode.

Naughty Naughty

Killed 10 Engineers in the city at night, alone or with another ODST.