Killing things that are new and different is good, alone or with another ODST.
Unlocked: 18 Oct 2009 20:03:00
Complete Highway on 4-player Legendary LIVE co-op, with Iron, and no 'Hog or Scorpion.
Unlocked: 17 Oct 2009 20:38:06
Score over 200,000 points in Firefight on Last Exit.
Unlocked: 16 Oct 2009 00:03:50
Score over 200,000 points in Firefight on Alpha Site.
Unlocked: 15 Oct 2009 23:09:31
Score over 200,000 points in Firefight on Windward.
Unlocked: 15 Oct 2009 14:37:25
Score over 200,000 points in Firefight on Rally Point.
Unlocked: 14 Oct 2009 14:21:19
Complete the Campaign on Heroic difficulty.
Unlocked: 13 Oct 2009 21:48:10
Complete the Campaign on Legendary to unlock a new Firefight character.
Unlocked: 13 Oct 2009 21:48:10
Score over 200,000 points in Firefight on Crater.
Unlocked: 12 Oct 2009 15:19:48
Finish any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.
Unlocked: 11 Oct 2009 17:09:36
In Firefight, on any mission, pass the 4th Set on 4-player Heroic LIVE co-op.
Unlocked: 11 Oct 2009 15:24:33
Score over 200,000 points in Firefight on Lost Platoon.
Unlocked: 11 Oct 2009 12:56:10
Stun a vehicle with an overcharged plasma pistol and quickly kill the driver.
Unlocked: 10 Oct 2009 23:27:59
Score over 200,000 points in Firefight on Chasm Ten.
Unlocked: 10 Oct 2009 17:22:42
Score over 200,000 points in Firefight on Security Zone.
Unlocked: 09 Oct 2009 23:57:05
In Firefight, finish a full round without killing a single enemy.
Unlocked: 09 Oct 2009 15:04:13
Plasma Pistol Overcharge and quickly kill 10 Brutes.
Unlocked: 08 Oct 2009 13:32:17
Audiophile
75Find all Audio Logs, alone or with another ODST.
Unlocked: 08 Oct 2009 12:57:25
Killing things that are new and different is bad, alone or with another ODST.
Unlocked: 08 Oct 2009 12:49:08
Get 10 Rocket kills on Kizingo Boulevard.
Unlocked: 08 Oct 2009 12:01:01
Headcase
5Finish any level with at least one Skull activated.
Unlocked: 08 Oct 2009 11:46:04
All Ears
30Find 15 Audio Logs, alone or with another ODST.
Unlocked: 08 Oct 2009 11:17:31
Get 10 Needler supercombine kills on any covenant.
Unlocked: 07 Oct 2009 23:06:13
Complete Coastal Highway on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Unlocked: 07 Oct 2009 22:47:30
Complete the Campaign on Normal difficulty.
Unlocked: 07 Oct 2009 22:47:30
Data Hive
50Complete Data Hive on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Unlocked: 07 Oct 2009 22:12:35
Kill 10 enemies with the Flamethrower on Data Hive.
Unlocked: 07 Oct 2009 21:53:56
Complete Kikowani Station on Normal, Heroic, or Legendary.
Unlocked: 07 Oct 2009 21:32:42
Super Sleuth
10Find the final clue unraveling the mystery, alone or with another ODST.
Unlocked: 07 Oct 2009 16:53:15
NMPD HQ
30Complete NMPD HQ on Normal, Heroic, or Legendary to unlock a new Firefight character.
Unlocked: 07 Oct 2009 16:43:16
Get 15 headshot kills on NMPD HQ.
Unlocked: 07 Oct 2009 16:24:01
Complete Kizingo Blvd. on Normal, Heroic, or Legendary to unlock a new Firefight character.
Unlocked: 07 Oct 2009 16:10:41
Complete ONI Alpha Site on Normal, Heroic, or Legendary to unlock a new Firefight mission.
Unlocked: 07 Oct 2009 15:39:47
Get 10 Spartan Laser kills on ONI Alpha Site.
Unlocked: 07 Oct 2009 15:29:03
Gumshoe
10Find the 3rd clue unraveling the mystery, alone or with another ODST.
Unlocked: 07 Oct 2009 15:21:42
Get 5 sticky grenade kills in any level.
Unlocked: 07 Oct 2009 15:18:52
Tuned In
15Find 3 Audio Logs, alone or with another ODST.
Unlocked: 07 Oct 2009 15:09:49
Complete Uplift Reserve on Normal, Heroic, or Legendary to unlock a new Firefight character.
Unlocked: 07 Oct 2009 15:07:20
Kill all Wraiths in Uplift Reserve.
Unlocked: 07 Oct 2009 15:02:25
Trade weapons with a fellow character.
Unlocked: 07 Oct 2009 15:00:19
Listener
5Find the first Audio Log.
Unlocked: 07 Oct 2009 14:37:34
Tayari Plaza
30Complete Tayari Plaza on Normal, Heroic, or Legendary to unlock a new Firefight character.
Unlocked: 07 Oct 2009 14:24:09
Find the first clue unraveling the mystery.
Unlocked: 07 Oct 2009 14:08:18
Tourist
5Access and download the city map to your VISR.
Unlocked: 07 Oct 2009 14:02:56
Heal Up
5Find the first Medical Kiosk and heal yourself.
Unlocked: 07 Oct 2009 13:32:37
Kill 5 enemies while using VISR mode.
Unlocked: 07 Oct 2009 13:03:59
Get 10 automag headshot kills in any level.
Unlocked: 07 Oct 2009 13:02:40