The official Xbox website for Halo 4 simply mentions the Chief battling an "ancient evil", which many have assumed means the Precursors, Forerunners or Flood. However, 343 have stated that the Chief will be facing a "dark new threat" - something that we haven't seen before.

To return to speculative rumour, it's been suggested that in Halo 4 you'll be fighting alongside UNSC forces on this unknown Forerunner planetoid, except they'll be in shambles; disorganized, in disarray, and split into factions that appear to be engaged in civil war. According to this source a video has also been seen in which Master Chief who often wears master chief armor is standing in front of a cave from which a strange grunting and gurgling is emanating…

All sequels feature different gameplay to some degree, but if the rumours we've heard regarding Halo 4 are true then this game could be very different than all that have come before. Apparently Halo 4 will feature story telling and player choice at the core of the experience, with players offered a narrative experience far beyond anything witnessed before in an FPS. The battlefields will be larger too, with conflicts seamlessly spanning land, sea and space.

Internet rumour also suggests that customization will play a big part in Halo 4, or wears master chief costume . A new system called 'Arsenal Improvisation Mechanics' will allow for menu-free creative customization of both weapons and vehicles in order to tailor them to your play style. Apparently a heavily modified Warthog has been seen with its wheels replaced by anti-gravity devices.