Halo 4 Campaign: Composer 

Master Chief and Cortana continue their pursuit of the Didact as he searches for the Composer, a powerful that can turn the fate of humanity in an instant. Scientists at Ivanoff Research Station have been studying the Forerunner artifact, but now they are in jeopardy. Chief and Cortana must prevent the Didact from finding and obtaining the Composer before it's too late. We are joined from across the pond by writer/director Peter Cooper as we near the conclusion of Halo 4's story arc. Enjoy
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