BTS

"BTSs" (short for Behind The Scenes) are a series of video documentaries released by 343 Industries showcasing a particular feature or aspect of an upcoming game. BTS video documentaries are the spiritual successors to the ViDocs produced by Bungie and Ensemble Studios, though their running times are far less uniform than the seven-minute ViDocs, ranging from two to seven minutes.

Halo: Reach

 * BTS: Defiant Map Pack

Halo: Combat Evolved Anniversary

 * BTS: Anniversary Multiplayer
 * BTS: Anniversary Campaign
 * BTS: Anniversary Terminals
 * BTS: Anniversary Music

Halo: Waypoint

 * BTS: Halo Waypoint