Use MARCH2016, If MARCH15 doesn't work.

For the first time ever, The Master Chief's entire story is on one console. Featuring a re-mastered Halo 2: Anniversary, along with Halo: Combat Evolved Anniversary, Halo 3, and Halo 4, new digital series, Halo: Nightfall, and access to the Halo 5: Guardians Beta, this is the definitive Halo experience. To launch the Halo: The Master Chief Collection at E3, Xbox and developer 343 Industries recreated one of the most iconic moments in the newly re-mastered Halo 2, with a twist by revealing that what the audience is seeing is a holographic projection that is being watched by a new and pivotal character in the Halo universe: Agent Locke