343 Industries have just unveiled Ragnarok one of ten new maps that will ship with Halo 4 when it releases in November. Ragnarok is a remake of Valhalla an original map that released with Halo 3 back in 2007. Other than having a facelift, Ragnarok is basically the same map we all loved and played back in the day.
Another thing 343 revealed is the Mantis, a played mech that has a machine gun and a rocket launcher.
Check out a gameplay trailer of the Mantis and some new screenshots of Ragnarok below.