The new Warzone is a vast 12-on-12 multiplayer matchup where your team fights not only other players but also computer-controlled AI as well. four deathmatch, but there's also a new mode this time around.
Halo 5 will come with co-op multiplayer in the main game and the classic "arena" four vs. We're going to need a lot more time to properly judge the main story campaign in Halo 5: Guardians, but - as with all Halo games - the story mode is far from the only reason to play.