The first work was started on "Halo 3" before the release of Halo 2 in 2004. Through 2004/2005 Bungie refused to confirm they were working on "Halo 3", only saying that they had a 'new project'. The game was officially announced with a trailer at E3 2006. While details of the multiplayer were openly announced and talked about before release, details of the story were kept mostly secret until the day of the launch. There are over 40,000 recorded clips of Non Player Character (NPC) dialogue in Halo 3. That is more than twice times as many for Halo 2. Separate sound recordings were made for nearby and distant gunfire to make a more believable experience. Like Halo 1 and 2 the game has its own especially recorded classical soundtrack. The music was recorded with a 27 piece choir and a 60 piece orchestra.
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