Halo 3: ODST achievements

7.29%

Vidmaster Challenge: Endure

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

7.63%

Firefight: Chasm Ten

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

8.82%

Firefight: Windward

Scored over 200,000 points in Firefight on Windward.

8.82%

Firefight: Last Exit

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

8.91%

Firefight: Security Zone

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

9.08%

Firefight: Rally Point

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

9.84%

Vidmaster Challenge: Déjà Vu

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

11.96%

Naughty Naughty

Killed 10 Engineers in the city at night, alone or with another ODST.

12.21%

Firefight: Crater

Scored over 200,000 points in Firefight on Crater.

12.38%

Firefight: Alpha Site

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

12.81%

Audiophile

Found all Audio Logs, alone or with another ODST.

12.98%

Firefight: Lost Platoon

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