One of the most important elements of any First Person Shooter is the weaponry on offer. Science Fiction epics such as Halo 4 are not constrained by piffling concepts such as physics or reality. Even so, 343 Industries are doing a good job creating believable future weapons for UNSC troops to handle. Check out the trailer to see an artillery of them.
Due out on November 6th, Halo 4 is shaping up to be quite the different experience from the previous games. On the co-op front, we have campaign co-op as well as the 4 player Spartan Mode which will consist of up to 12 hours of gameplay and have its own campaign. Both of these gameplay modes look solid, and it looks like we will have some awesome weapons to use to take care of both new and old enemies.