Bungie has released the third in the Halo 3: ODST ViDoc series, entitled "Terra Incognita." With the help of Bungie staffers like Curtis Creamer, Joseph Staten and Marty O'Donnell, the video takes a look at the development of ODST, which was completed in just one year. The team spends a good deal of time -- the video is over 8 minutes long -- discussing the hub of New Mombasa, the open-world area where players will spend their time as "the Rookie." The video also goes over some of the additions to the game, as well as the subtractions. Incidentally, if you miss dual-wielding, blame design director Paul Bertone. Apparently he "doesn't like it." Give it a watch, and be sure to check out Joystiq's latest hands-on impressions of the ODST campaign and new screens below: