 A significant form of marketing was done by the release of videos. While Bungie often partnered with other companies to create advertisements, they also produced their own video documentaries, or "ViDocs", detailing the behind-the-scenes development of aspects of Halo 3, including redesigning enemy Brutes, additions to multiplayer, and other game features. The first ViDoc was released shortly after the game's announcement and was a "making-of" style video, while the final ViDoc made its debut on September 20, 2007.
