What are achievements in Halo 3.?
Landfall (20 points): Finish the first mission of the Campaign on Normal, Heroic, or Legendary. Holdout (20 points): Finish the second mission of the Campaign on Normal, Heroic, or Legendary. The Road (20 points): Finish the third mission of the Campaign on Normal, Heroic, or Legendary. Assault (30 points): Finish the fourth mission of the Campaign on Normal, Heroic, or Legendary. Cleansing (30 points): Finish the fifth mission of the Campaign on Normal, Heroic, or Legendary. Refuge (30 points): Finish the sixth mission of the Campaign on Normal, Heroic, or Legendary. Last Stand (40 points): Finish the seventh mission of the Campaign on Normal, Heroic, or Legendary. The Key (40 points): Finish the eighth mission of the Campaign on Normal, Heroic, or Legendary. Return (50 points): Finish the final mission of the Campaign on Normal, Heroic, or Legendary. Campaign Complete: Normal (125 points): Finish the Campaign on Normal. Campaign Complete: Heroic (125 points): Finish the Campaign on H