BTS: Anniversary Campaign
From Halopedia, the Halo wiki
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BTS: Anniversary Campaign is a 343 Industries Behind-the-Scenes documentary video that offers a look at the developmental process of the remastered campaign experience featured within Halo: Combat Evolved Anniversary, and was first released on YouTube and Halo Waypoint on October 17, 2011.[1][2] It features exclusive interviews with both 343 Industries and Saber Interactive employees.
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