Vidmaster Challenge: Endure

In Firefight, on any mission, passed the 4th Set on 4-player Heroic LIVE co-op.

Firefight: Alpha Site

Scored over 200,000 points in Firefight on Alpha Site.

Firefight: Chasm Ten

Scored over 200,000 points in Firefight on Chasm Ten.

Firefight: Last Exit

Scored over 200,000 points in Firefight on Last Exit.

Firefight: Crater

Scored over 200,000 points in Firefight on Crater.

Be Like Marty

In Firefight, finished a full round without killing a single enemy.

Firefight: Rally Point

Scored over 200,000 points in Firefight on Rally Point.

Firefight: Lost Platoon

Scored over 200,000 points in Firefight on Lost Platoon.

Firefight: Windward

Scored over 200,000 points in Firefight on Windward.

Firefight: Security Zone

Scored over 200,000 points in Firefight on Security Zone.

Vidmaster Challenge: Classic

Finished any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.

Stunning!

Stunned a vehicle with an overcharged plasma pistol and quickly killed the driver.

Vidmaster Challenge: Déjà Vu

Completed Highway on 4-player Legendary LIVE co-op, with Iron, and no 'Hog or Scorpion.

Headcase

Finished any level with at least one Skull activated.

Wraith Killer

Killed all Wraiths in Uplift Reserve.

Naughty Naughty

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

Ewww, Sticky

Got 5 sticky grenade kills in any level.

I Like Fire

Killed 10 enemies with the Flamethrower on Data Hive.

Pink and Deadly

Got 10 Needler supercombine kills on any covenant.

My Clothes!

Plasma Pistol Overcharged and quickly killed 10 Brutes.

Campaign Complete: Legendary

Completed Legendary and unlocked the Dare character in Firefight.

Coastal Highway

Completed Coastal Highway and unlocked the Last Exit Firefight mission.

Campaign Complete: Normal

Completed the Campaign on Normal difficulty.

Campaign Complete: Heroic

Completed the Campaign on Heroic difficulty.

Data Hive

Completed Data Hive and unlocked the Chasm Ten Firefight mission.

Audiophile

Found all Audio Logs, alone or with another ODST.

Good Samaritan

Killed no Engineers in the city at night during entire campaign, alone or with another ODST.

Kikowani Station

Completed Kikowani Station on Normal, Heroic, or Legendary.

Super Sleuth

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

All Ears

Found 15 Audio Logs, alone or with another ODST.

NMPD HQ

Completed NMPD HQ and unlocked the Romeo character in Firefight.

Dome Inspector

Got 15 headshot kills on NMPD HQ.

ONI Alpha Site

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

Laser Blaster

Got 10 Spartan Laser kills on ONI Alpha Site.

Tuned In

Found 3 Audio Logs, alone or with another ODST.

Kizingo Boulevard

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

Both Tubes

Got 10 Rocket kills on Kizingo Boulevard.

Gumshoe

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

Listener

Found the first Audio Log.

Uplift Reserve

Completed Uplift Reserve and unlocked the Dutch character in Firefight.

Trading Down

Traded weapons with a fellow character.

Tayari Plaza

Completed Tayari Plaza and unlocked the Buck character in Firefight.

Heal Up

Found the first Medical Kiosk and healed yourself.

Junior Detective

Found the first clue unraveling the mystery.

Boom, Headshot

Got 10 automag headshot kills in any level.

Tourist

Accessed and downloaded the city map to your VISR.

Dark Times

Killed 5 enemies while using VISR mode.