A Youtube gaming channel has found the whole list of the upcoming ‘Halo3: ODST’ gaming achievements from the Xbox.com servers. It’s quite an extensive list which shows that many new characters are unlockable with a huge amount of the achievements for the new FireFight Horde style gameplay mode. Please note that the achievements list contains potential game spoilers.

Now the achievement list.

Listener – 5 GamerScore
Found the first Audio Log.

Kikowani Station – 30 GamerScore
Completed Kikowani Station on Normal, Heroic or Legendary.

Data Hive – 50 GamerScore
Completed Data Hive and unlocked the Chasm Ten Firefight mission.

Kizingo Boulevard – 30 GamerScore
Completed Kizingo Blvd. and unlocked the Mickey character in Firefight.

ONI Alpha Site – 30 GamerScore
Completed ONI Alpha Site and unlocked the Alpha Site Firefight mission.

NMPD HQ – 30 GamerScore
Completed NMPD HQ and unlocked the Romeo character in Firefight.

Campaign Complete: Legendary – 100 GamerScore
Completed Legendary and unlocked the Dare character in Firefight.

Junior Detective – 10 GamerScore
Found the first clue unravelling the mystery.

Gumshoe – 10 GamerScore
Found the 3rd clue unravelling the mystery, alone or with another ODST.

Coastal Highway – 50 GamerScore
Completed Coastal Highway and unlocked the Last Exit Firefight mission.

Campaign Complete: Normal – 100 GamerScore
Completed the Campaign on Normal difficulty.

Campaign Complete: Heroic – 100 GamerScore
Completed the Campaign on Heroic difficulty.

Boom, Headshot – 5 GamerScore
Got 10 automag headshot kills in any level.

Stunning! – 5 GamerScore
Stunned a vehicle with an overcharged plasma pistol and quickly killed the driver.

Ewww, Sticky – 5 GamerScore
Got 5 sticky grenade kills in any level.

Heal Up – 5 GamerScore
Found the first Medical Kiosk and healed yourself.

Tourist – 5 GamerScore
Accessed and downloaded the city map to your VISR.

Dark Times – 5 GamerScore
Killed 5 enemies while using VISR mode.

Headcase – 5 GamerScore
Finished any level with at least one Skull activated.

Tayari Plaza – 30 GamerScore
Completed Tayari Plaza and unlocked the Buck character in Firefight.

Uplift Reserve – 30 GamerScore
Completed Uplift Reserve and unlocked the Dutch character in Firefight.

My Clothes! – 5 GamerScore
Plasma Pistol Overcharged and quickly killed 10 Brutes.

Pink and Deadly – 5 GamerScore
Got 10 Needler supercombine kills on any covenant.

Trading Down – 5 GamerScore
Traded weapons with a fellow character

Firefight: Security Zone – 10 GamerScore
Scored over 200,000 points in Firefight on Security Zone.

Firefight: Alpha Site – 10 GamerScore
Scored over 200,000 points in Firefight on Alpha Site.

Firefight: Rally Point – 10 GamerScore
Scored over 200,000 points in Firefight on Rally Point.

Firefight: Crater – 10 GamerScore
Scored over 200,000 points in Firefight on Crater.

Firefight: Lost Platoon – 10 GamerScore
Scored over 200,000 points in Firefight on Lost Platoon.

Firefight: Windward – 10 GamerScore
Scored over 200,000 points in Firefight on Windward.

Vidmaster Challenge: Endure – 25 GamerScore
In Firefight, on any mission, passed the 4th Set on 4-player Heroic LIVE co-op.

Vidmaster Challenge: Déjà vu – 25 GamerScore
Completed Highway on 4-player Legendary LIVE co-op, with Iron, and no ‘Hog or Scorpion.

Vidmaster Challenge: Classic – 25 GamerScore
Finished any level solo on Legendary, on LIVE, with no shots fired or grenades thrown.

Firefight: Chasm Ten – 10 GamerScore
Scored over 200,000 points in Firefight on Chasm Ten.

Firefight: Last Exit – 10 GamerScore
Scored over 200,000 points in Firefight on Last Exit.

Be Like Marty – 10 GamerScore
In Firefight, finished a full round without killing a single enemy.

Laser Blaster – 5 GamerScore
Got 10 Spartan Laser kills on ONI Alpha Site.

Dome Inspector – 5 GamerScore
Got 15 headshot kills on NMPD HQ.

Both Tubes – 5 GamerScore
Got 10 Rocket kills on Kizingo Boulevard.

Super Sleuth – 10 GamerScore
Found the final clue unravelling the mystery, alone or with another ODST.

Wraith Killer – 5 GamerScore
Killed all Wraiths in Uplift Reserve

I Like Fire – 5 GamerScore
Killed 10 enemies with the Flamethrower on Data Hive.

All Ears – 30 GamerScore
Found 15 Audio Logs, alone or with another ODST.

Audiophile – 75 GamerScore
Found all Audio Logs, alone or with another ODST.

Tuned In – 15 GamerScore
Found 3 Audio Logs, alone or with another ODST.

Good Samaritan – 20 GamerScore
Killed no Engineers in the city at night during entire campaign, alone or with another ODST.

Naughty Naughty – 5 GamerScore
Killed 10 Engineers in the city at night, alone or with another ODST.

Halo3: ODST will be released worldwide on September 22nd 2009.

Source: Youtube