Minecraft wiki entry for Mash-up_pack, associated text: The Halo 5: Guardians update was released on October 28, 2015 and is based on Halo 5: Guardians, developed by 343 Industries. It is downloadable through the Xbox 360 or One Marketplace or directly in-game through the Downloadable Content section of the game and is a free update to the Halo Mash-up pack.[13]