This clip, seemingly done for Spartan Ops, was done by Planet Jump animation studio for the launch of Halo 4 last year. Part-animated clip, part-motion comic, its got an anime style and helps explain, at least partially, why the Covenant are hanging around the game. Better than the game manages, anyway.
You can see the video itself here, while there's a big collection of Alezander Watt and Antinori's art below.
Halo 4 Promotional Film [Planet Jump]
To see the larger pics in all their glory (or, if they're big enough, so you can save them as wallpaper), right-click on them below and select "open in new tab".
Fine Art is a celebration of the work of video game artists, showcasing the best of both their professional and personal portfolios. If you're in the business and have some concept, environment, promotional or character art you'd like to share, drop us a line!