A couple of days ago we had reported a rumor that the beta of Halo 5: Guardians in advance to December 9. Today Microsoft wanted to dispel any doubt, stressing that waiting game beta will begin officially on 29 December through until 18 January. Please note that the multiplayer beta will help developers to understand what needs to be changed in the game based on feedback from players, and not just to test the response of servers under high load.