Halo 4: Spartan Ops Extended Behind the Scenes
343 Industries and Axis Animation talk about creating the unprecedented Spartan Ops content for Halo 4.
Halo 4: Spartan Ops - Episode 5
Here is the fifth CG episode of Halo 4: Spartan Ops, created by Axis Animation.
Halo 4 - Concept Art Trailer
There is some inspiring scenery in this concept art trailer for Halo 4 from 343 Industries.