Today during Microsoft's E3 2015 briefing, the company officially announced a new multiplayer mode for Halo 5: Guardians called Warzone.

　　The mode supports 24 players and features AI-controlled enemies. There are also "massive-scale" environments that are four times the size of any previous Halo map, Microsoft said.

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　　Halo 5: Guardians - Warzone E3 2015 Trailer

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　　We'll have more details on Warzone later this week from E3. For now, check out the trailer above, as well as our article on the Halo 5 campaign demo.

　　Microsoft's E3 2015 briefing has concluded. You can check out a recap of everything that was announced here.