Gravity have created this CG Samurai animation for Microsoft.
Project Spark - Trailer
This CG trailer for Project Spark displays the potential of the game creation platform by Microsoft.
Titanfall: Life is Better With a Titan
Life is better with a Titan, at least according to this commercial for Titanfall.
Halo 4 - Developer Showcase
The developers at 343 Industries discuss the upcoming Halo 4 shooter game.