Stun a vehicle with an overcharged plasma pistol and quickly kill the driver.

Unlocked: 14 Mar 2010 18:18:02

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

Unlocked: 14 Mar 2010 18:14:02

Killing things that are new and different is good, alone or with another ODST.

Unlocked: 14 Mar 2010 17:42:25

Get 10 Spartan Laser kills on ONI Alpha Site.

Unlocked: 14 Mar 2010 16:23:51

Complete the Campaign on Legendary to unlock a new Firefight character.

Unlocked: 04 Dec 2009 15:34:47

Find all Audio Logs, alone or with another ODST.

Unlocked: 04 Dec 2009 00:09:46

Killing things that are new and different is bad, alone or with another ODST.

Unlocked: 03 Dec 2009 23:32:09

Get 10 Rocket kills on Kizingo Boulevard.

Unlocked: 23 Nov 2009 21:52:11

Plasma Pistol Overcharge and quickly kill 10 Brutes.

Unlocked: 22 Nov 2009 19:48:38

Get 5 sticky grenade kills in any level.

Unlocked: 22 Nov 2009 19:42:43

Complete the Campaign on Heroic difficulty.

Unlocked: 22 Nov 2009 14:59:33

Complete Coastal Highway on Normal, Heroic, or Legendary to unlock a new Firefight mission.

Unlocked: 22 Nov 2009 14:59:32

Complete the Campaign on Normal difficulty.

Unlocked: 22 Nov 2009 14:59:32

Complete Data Hive on Normal, Heroic, or Legendary to unlock a new Firefight mission.

Unlocked: 22 Nov 2009 13:59:58

Kill 10 enemies with the Flamethrower on Data Hive.

Unlocked: 22 Nov 2009 13:21:20

Find 15 Audio Logs, alone or with another ODST.

Unlocked: 21 Nov 2009 23:35:56

Trade weapons with a fellow character.

Unlocked: 21 Nov 2009 23:16:02

Get 10 Needler supercombine kills on any covenant.

Unlocked: 20 Nov 2009 16:09:05

Finish any level with at least one Skull activated.

Unlocked: 20 Nov 2009 15:22:44

Complete Kikowani Station on Normal, Heroic, or Legendary.

Unlocked: 20 Nov 2009 15:22:44

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

Unlocked: 19 Nov 2009 01:48:29

Complete NMPD HQ on Normal, Heroic, or Legendary to unlock a new Firefight character.

Unlocked: 19 Nov 2009 01:34:03

Get 15 headshot kills on NMPD HQ.

Unlocked: 19 Nov 2009 01:10:17

Complete ONI Alpha Site on Normal, Heroic, or Legendary to unlock a new Firefight mission.

Unlocked: 19 Nov 2009 00:52:10

Complete Kizingo Blvd. on Normal, Heroic, or Legendary to unlock a new Firefight character.

Unlocked: 19 Nov 2009 00:06:32

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

Unlocked: 18 Nov 2009 23:42:38

Find 3 Audio Logs, alone or with another ODST.

Unlocked: 18 Nov 2009 23:13:51

Complete Uplift Reserve on Normal, Heroic, or Legendary to unlock a new Firefight character.

Unlocked: 18 Nov 2009 23:07:40

Kill all Wraiths in Uplift Reserve.

Unlocked: 18 Nov 2009 23:02:06

Find the first Audio Log.

Unlocked: 18 Nov 2009 22:15:57

Complete Tayari Plaza on Normal, Heroic, or Legendary to unlock a new Firefight character.

Unlocked: 18 Nov 2009 22:11:34

Find the first clue unraveling the mystery.

Unlocked: 18 Nov 2009 21:30:29

Access and download the city map to your VISR.

Unlocked: 18 Nov 2009 21:15:27

Get 10 automag headshot kills in any level.

Unlocked: 18 Nov 2009 21:13:58

Kill 5 enemies while using VISR mode.

Unlocked: 18 Nov 2009 21:11:26

Find the first Medical Kiosk and heal yourself.

Unlocked: 18 Nov 2009 21:04:06

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

Score over 200,000 points in Firefight on Crater.

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

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

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

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

Score over 200,000 points in Firefight on Windward.

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

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

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

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