In comparison with "Halo 2"s tight-lipped development, Bungie was more transparent about the process for "Halo 3". Bungie kept the public informed on game development via weekly updates on their web site. During development, the game was divided into single player and multiplayer builds; this made debugging and testing the much smaller multiplayer files quicker. While details of "Halo 3"s multiplayer were widely disseminated in the sixteen months leading up to the release, the single-player aspect of the storyline was kept relatively secret throughout much of the development to build up interest. The first campaign screenshots did not appear until a year after the announcement trailer, on July 5, 2007, as a "tease" for the planned pace of marketing.