EVA Armor

To unlock the EVA Armor in Halo 3, you will need to complete a few different tasks.

• To unlock the EVA “Body”, you will need to complete “Tsavo Highway” in Campaign mode on either Normal, Heroic, or Legendary.
• To unlock the EVA “Shoulders”, you need to complete “The Ark” in Campaign mode on either Normal, Heroic, or Legendary.
• To unlock the EVA “Helmet”, you will need to complete the Campaign on either Normal, Heroic, or Legendary.

You can knock this whole set out in one run by simply finishing the game in Normal, Heroic, or Legendary difficulty mode.