Halo 5 E3 Campaign Demo. XBOX ONE EXCLUSIVE. Revealed at E3 2015, this Halo 5 Guardians campaign debut shows Spartan Locke and Fireteam Osiris in the mission “Battle of Sunaion,” as they pursue the Master Chief and Blue Team on the planet Sanghelios. The campaign in Halo 5: Guardians will feature seamless drop-in/out online cooperative gameplay on dedicated servers, enormous, complex levels designed to support more enemies and bigger firefights, enhanced immersive audio and sound, sophisticated teammate AI, and much more, all at 60 fps. Halo 5 Guardians is available October 27, 2015.