Master Chief nukes some Covenant in this CG trailer for Halo: The Master Chief Collection.
Polynoid's VFX for Halo 4: Forward Unto Dawn
Check out Polynoid's beautiful VFX work for Halo 4: Forward Unto Dawn's opening.
Halo 4 Spartan Ops - Episode 2
Here is the second CG episode created for Halo 4's Spartan Ops.
Making Halo 4 - Part 1 and 2
Join 343 Industries on a 20 minute behind the scenes featurette on the creation of Halo 4.