Halo 5 Guardians MP Beta Trailer. Ready for some hot Red on Blue action? To prepare fans for the start of the highly-anticipated Halo 5: Guardians Multiplayer Beta on Dec. 29, this new trailer provides a sneak peek at the new maps, modes, weapons and Spartan Abilities featured in the intense 4v4 multiplayer arena gameplay of the 3-week beta. Each week we will feature new content including 7 new maps, new weapons, new modes, and a new Competitive Skill Rating (CSR) system. Now sit back and enjoy watching multiplayer matches in the all - new Spectator Mode. Available from Dec. 29, 2014 through Jan. 18, 2015 to anyone who owns a copy of Halo: The Master Chief Collection.