Achievements: Achieve it in Halo 3: ODST.
All Ears (30 points)
Find 15 Audio Logs, alone or with another ODST.
Audiophile (75 points)
Find all Audio Logs, alone or with another ODST.
Be Like Marty (10 points)
In Firefight, finish a full round without killing a single enemy.
Boom, Headshot (5 points)
Get 10 automag headshot kills in any level.
Both Tubes (5 points)
Get 10 Rocket kills on Kizingo Boulevard.
Campaign Complete: Heroic (100 points)
Complete the Campaign on Heroic difficulty.
Campaign Complete: Legendary (100 points)
Complete the Campaign on Legendary to unlock a new Firefight character.
Campaign Complete: Normal (100 points)
Complete the Campaign on Normal difficulty.
Coastal Highway (50 points)
Complete Coastal Highway on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Dark Times (5 points)
Kill 5 enemies while using VISR mode.
Data Hive (50 points)
Complete Data Hive on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Dome Inspector (5 points)
Get 15 headshot kills on NMPD HQ.
Ewww, Sticky (5 points)
Get 5 sticky grenade kills in any level.
Firefight: Alpha Site (10 points)
Score over 200,000 points in Firefight on Alpha Site.
Firefight: Chasm Ten (10 points)
Score over 200,000 points in Firefight on Chasm Ten.
Firefight: Crater (10 points)
Score over 200,000 points in Firefight on Crater.
Firefight: Last Exit (10 points)
Score over 200,000 points in Firefight on Last Exit.
Firefight: Lost Platoon (10 points)
Score over 200,000 points in Firefight on Lost Platoon.
Firefight: Rally Point (10 points)
Score over 200,000 points in Firefight on Rally Point.
Firefight: Security Zone (10 points)
Score over 200,000 points in Firefight on Security Zone.
Firefight: Windward (10 points)
Score over 200,000 points in Firefight on Windward.
Good Samaritan (20 points)
Do not kill any engineers at night in New Mombasa, alone or with another ODST.
Gumshoe (10 points)
Find the 3rd clue unraveling the mystery, alone or with another ODST.
Headcase (5 points)
Finish any level with at least one Skull activated.
Heal Up (5 points)
Find the first Medical Kiosk and heal yourself.
I Like Fire (5 points)
Kill 10 enemies with the Flamethrower on Data Hive.
Junior Detective (10 points)
Find the first clue unraveling the mystery.
Kikowani Station (30 points)
Complete Kikowani Station on Normal, Heroic, or Legendary.
Kizingo Boulevard (30 points)
Complete Kizingo Blvd. on Normal, Heroic, or Legendary to unlock a new Firefight character.
Laser Blaster (5 points)
Get 10 Spartan Laser kills on ONI Alpha Site.
Listener (5 points)
Find the first Audio Log.
My Clothes! (5 points)
Plasma Pistol Overcharge and quickly kill 10 Brutes.
Naughty Naughty (5 points)
Kill 10 engineers at night in New Mombasa, alone or with another ODST.
NMPD HQ (30 points)
Complete NMPD HQ on Normal, Heroic, or Legendary to unlock a new Firefight character.
ONI Alpha Site (30 points)
Complete ONI Alpha Site on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Pink and Deadly (5 points)
Get 10 Needler supercombine kills on any covenant.
Stunning! (5 points)
Stun a vehicle with an overcharged plasma pistol and quickly kill the driver.
Super Sleuth (10 points)
Find the final clue unraveling the mystery, alone or with another ODST.
Tayari Plaza (30 points)
Complete Tayari Plaza on Normal, Heroic, or Legendary to unlock a new Firefight character.
Tourist (5 points)
Access and download the city map to your VISR.
Trading Down (5 points)
Trade weapons with a fellow character.
Tuned In (15 points)
Find 3 Audio Logs, alone or with another ODST.
Uplift Reserve (30 points)
Complete Uplift Reserve on Normal, Heroic, or Legendary to unlock a new Firefight character.
Vidmaster Challenge: Classic (25 points)
Finish any level solo on Legendary, on Live, with no shots fired or grenades thrown.
Vidmaster Challenge: De'ja` Vu (25 points)
Complete Highway on 4-player Legendary Live co-op, with Iron, and no 'Hog or Scorpion.
Vidmaster Challenge: Endure (25 points)
In Firefight, on any mission, pass the 4th Set on 4-player Heroic Live co-op.
Wraith Killer (5 points)
Kill all Wraiths in Uplift Reserve.