Halo 5 Guardians - Xbox One Digital Code Xbox Live subscription required for online play. Intense story on a galactic scale: Play as the Master Chief and Spartan Locke across three new worlds. Your team is your weapon: Play solo or with friends in a 4-player co-op experience. Warzone: New, 24-player massive-scale multiplayer mode. Arena: Pure, skill-based 4-vs-4 competitive combat.