Complete the indicated task to unlock the corresponding armor.

Armor	How to unlock
Mark VI (Gen1) helmet and armor	Earn the "Your Journey Begins" achievement in Halo: The Master Chief Collection.
Mark VI (Gen1) Scarred helmet and armor	Earn the "Cairo Stations" achievement in Halo: The Master Chief Collection.
Helioskrill helmet and armor	Earn the "Legend" achievement in Halo: The Master Chief Collection.
Nightfall helmet	Watch the Halo: Nightfall - Episode 1 "Second Story".
Nightfall armor	Watch all five episodes of Halo: Nightfall.