The action ramps up in episode 4 of Halo 4: Forward Unto Dawn.
Halo: The Master Chief Collection - CG Trailer
Master Chief nukes some Covenant in this CG trailer for Halo: The Master Chief Collection.
Szymon Biernacki's Concept Art for Halo 4: Spartan Ops
Here's some of the concept art work created by Szymon Biernacki for Halo 4: Spartan Ops.
Halo 4 - Terminal Trailer
A new trailer has been released for Halo 4, from 343 Industries.