The Halo 5: Guardians Multiplayer Beta is an upcoming phase in the development of Halo 5: Guardians, produced by 343 Industries and organized by Microsoft. Purchasing Halo: The Master Chief Collection gives players access to the beta,[1] which is to be made available on December 27, 2014.[2] It was first revealed with a teaser trailer shown at Microsoft's E3 2014 media briefing.