Behold, a beautifully produced look behind the scenes at 343 Industries, maker of Halo 4, and all it took to make the new game.
We see a myriad of disciplines from animation to orchestral recital; from motion-captured performance to shooting guns in the desert.
Interspersed are clips from the finished product, Halo 4. And a suitably rousing score accompanies it all.
I recommend watching the video, whether you like Halo or not.