[Halo 3 video] How to unlock costumes

Author of this short Halo 3 video tutorial shows all armor types and how to unlock armor.
E.g. how to unlock the E.V.A.?

Step 1: Head - You must complete the campaign mode on Normal, Heroic, or Legendary.

Step 2: EVA Shoulders - You must complete the 'The Ark' level on Normal, Heroic, or Legendary.

Step 3: EVA Body - You must complete the 'Tsavo Highway' level on Normal, Heroic, or Legendary.

And so on on every single armor type.

Kudos to the guy for completing this tutorial.