I must say, this was quite a surprise. About a decade ago, Halo: Combat Evolved revolutionized how games, specifically first-person shooters, should be played. What followed was a succession of sequels, each being better than the last one. Inevitably, a movie was not far away. With the possible live-action movie postponed by companies fighting over it, this anime was created help satisfy fans and keep them waiting for the live-action film. It does its job well.
In a style similar to "Batman: Gotham Knight", Halo Legends consists of several action-packed episodes, each made by a different studio, having its own unique artwork/animation, and basically revealing a certain aspect of the Halo universe. The episodes are Origins Part 1 and 2 (history of the Halo universe), The Dual (how the Arbiter became a title of shame), Homecoming (the horror of the Spartan II program), Odd One Out (a ridiculous non-canon episode), Prototype (the first Spartan armor), The Babysitter (ODST-Spartan rivalry), and the Package (Master Chief and company go in to retrieve a heavily-guarded package).
Odd One Out is the only flaw in this movie. Everything else is excellent. Beautiful animation, wonderful music, awesome action scenes, and great stories. This is as good as the games. Fans will most likely enjoy this and so will you. In the words of the Master Chief, "... we're just getting started," because soon enough the live action movie will arrive.