Apart from the odd silly weekend playlist, Halo 5 doesn't really cater for your more casual gaming moods. You've got Arena matches for classic competition, and Warzone games when you're up for grand-scale carnage. A more chilled (or not) cooperative mode is coming, though, in the form of Warzone Firefight. It'll pit you and chums against increasingly overwhelming waves of alien enemies, similar to cooperative multiplayer modes you may have played in previous Halo titles. Over the weekend, Microsoft revealed a few more details about the new game type, as well as a trailer to get you nice and hype.