On top of the new Halo 3 maps, an intriguing new trailer for the Halo 3 campaign expansion has surfaced from Microsoft and Bungie. Everything looks suspiciously too peaceful to us, where are the guns? Where are the hoards of nasties to shoot? And why are the telling us to stay calm? We’ll just have to wait and see. In the mean time read our Halo 3 review if you missed it first time around.