Halo Legends (2010)

Halo Legends is a collection of seven short anime films set in the Halo science-fiction universe. Financed by Halo franchise overseer 343 Industries, the stories were created by six Japanese production houses: Bones, Casio Entertainment, Production I.G., Studio 4°C, and Toei Animation. Shinji Aramaki, creator and director of Appleseed and Appleseed Ex Machina, serves as the project's creative director. Warner Bros. released Legends on DVD and Blu-ray Disc on February 16, 2010.

More at Wikipedia.