Halo 4 - 21 must-know facts about the Halo universe
Get caught up before jumping into Halo 4
After 4 years floating around in deep space, Master Chief awakens to combat an ancient, galactic threat. Now sporting a dedicated co-op mode called Spartan Ops and some significant tweaks to the series' multiplayer, Halo 4 looks like it might be one of the biggest titles in the franchise.