Ultramarines: A Warhammer 40,000 Movie (2010)
Ultramarines: A Warhammer 40,000 Movie is a science fiction CGI film set in Games Workshop's fictional Warhammer 40,000 universe and based around the Ultramarines Chapter of the Space Marines. Terence Stamp, Sean Pertwee, and John Hurt head the cast of voice actors., and the screenplay was written by Black Library author Dan Abnett.
More at Wikipedia.