The Master Chief Collection! Infamous and long-awaited, the "GRD" helmet for Halo: Reach is finally available for unlock in the Collection alongside the Mariner helmet and EXO/TCSC chest piece. In Halo 3 discover brand new weapon skins and, for the first time in over a decade, unlock new armor! With over 60 individual pieces of armor and 12 complete sets, there has never been a better time to outfit your Spartan in the Collection.