- My Clothes!
Plasma Pistol Overcharged and quickly killed 10 Brutes.
28 September 2009 - 9 guides
- Laser Blaster
Got 10 Spartan Laser kills on ONI Alpha Site.
28 September 2009 - 5 guides
- Pink and Deadly
Got 10 Needler supercombine kills on any covenant.
27 September 2009 - 4 guides
- Campaign Complete: Legendary
Completed Legendary and unlocked the Dare character in Firefight.
27 September 2009 - 10 guides
- Campaign Complete: Heroic
Completed the Campaign on Heroic difficulty.
27 September 2009 - 2 guides
- Campaign Complete: Normal
Completed the Campaign on Normal difficulty.
27 September 2009 - 2 guides
- Coastal Highway
Completed Coastal Highway and unlocked the Last Exit Firefight mission.
- Data Hive
Completed Data Hive and unlocked the Chasm Ten Firefight mission.
26 September 2009 - 2 guides
- I Like Fire
Killed 10 enemies with the Flamethrower on Data Hive.
26 September 2009 - 5 guides
- Ewww, Sticky
Got 5 sticky grenade kills in any level.
26 September 2009 - 5 guides
- Kikowani Station
Completed Kikowani Station on Normal, Heroic, or Legendary.
26 September 2009 - 2 guides
- Super Sleuth
Found the final clue unraveling the mystery, alone or with another ODST.
26 September 2009 - 6 guides
- NMPD HQ
Completed NMPD HQ and unlocked the Romeo character in Firefight.
- Dome Inspector
Got 15 headshot kills on NMPD HQ.
26 September 2009 - 4 guides
- Kizingo Boulevard
Completed Kizingo Blvd. and unlocked the Mickey character in Firefight.
26 September 2009 - 3 guides
- Both Tubes
Got 10 Rocket kills on Kizingo Boulevard.
26 September 2009 - 5 guides
- ONI Alpha Site
Completed ONI Alpha Site and unlocked the Alpha Site Firefight mission.
- Gumshoe
Found the 3rd clue unraveling the mystery, alone or with another ODST.
26 September 2009 - 2 guides
- Tuned In
Found 3 Audio Logs, alone or with another ODST.
- Uplift Reserve
Completed Uplift Reserve and unlocked the Dutch character in Firefight.
- Wraith Killer
Killed all Wraiths in Uplift Reserve.
26 September 2009 - 8 guides
- Listener
Found the first Audio Log.
- Headcase
Finished any level with at least one Skull activated.
26 September 2009 - 3 guides
- Tayari Plaza
Completed Tayari Plaza and unlocked the Buck character in Firefight.
26 September 2009 - 3 guides
- Boom, Headshot
Got 10 automag headshot kills in any level.
26 September 2009 - 5 guides
- Trading Down
Traded weapons with a fellow character.
26 September 2009 - 4 guides
- Junior Detective
Found the first clue unraveling the mystery.
26 September 2009 - 2 guides
- Heal Up
Found the first Medical Kiosk and healed yourself.
26 September 2009 - 4 guides
- Tourist
Accessed and downloaded the city map to your VISR.
26 September 2009 - 4 guides
- Dark Times
Killed 5 enemies while using VISR mode.
26 September 2009 - 6 guides
- Stunning!
Stun a vehicle with an overcharged plasma pistol and quickly kill the driver.
Locked - 6 guides
- Good Samaritan
Killing things that are new and different is bad, alone or with another ODST.
Locked - 6 guides
- Naughty Naughty
Killing things that are new and different is good, alone or with another ODST.
Locked - 5 guides
- All Ears
Find 15 Audio Logs, alone or with another ODST.
Locked - 2 guides
- Audiophile
Find all Audio Logs, alone or with another ODST.
Locked - 4 guides
- Be Like Marty
In Firefight, finish a full round without killing a single enemy.
Locked - 9 guides
- Firefight: Crater
Score over 200,000 points in Firefight on Crater.
Locked - 7 guides
- Firefight: Lost Platoon
Score over 200,000 points in Firefight on Lost Platoon.
Locked - 8 guides
- Firefight: Rally Point
Score over 200,000 points in Firefight on Rally Point.
Locked - 4 guides
- Firefight: Security Zone
Score over 200,000 points in Firefight on Security Zone.
Locked - 3 guides
- Firefight: Alpha Site
Score over 200,000 points in Firefight on Alpha Site.
Locked - 6 guides
- Firefight: Windward
Score over 200,000 points in Firefight on Windward.
Locked - 4 guides
- Firefight: Chasm Ten
Score over 200,000 points in Firefight on Chasm Ten.
Locked - 7 guides
- Firefight: Last Exit
Score over 200,000 points in Firefight on Last Exit.
Locked - 4 guides
- Vidmaster Challenge: Classic
Finish any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.
Locked - 8 guides
- Vidmaster Challenge: Endure
In Firefight, on any mission, pass the 4th Set on 4-player Heroic LIVE co-op.
Locked - 25 guides
- Vidmaster Challenge: Déjà Vu
Complete Highway on 4-player Legendary LIVE co-op, with Iron, and no 'Hog or Scorpion.
Locked - 8 guides