Halo Legends: Original Soundtrack
From Halopedia, the Halo wiki
The Halo Legends: Original Soundtrack is a collection of music from the anime short film collection Halo Legends. It was released on February 9th, 2010.
The soundtrack was composed by various artists, such as Tetsuya Takahashi and Yasuharu Takanashi. Although the soundtrack contains mostly remixes of original work by Martin O'Donnell and Michael Salvatori, it also has some original material of its own.