Microsoft has announced that Halo 3, the third and final game in the Halo Trilogy developed by Bungie, will be released worldwide beginning Tuesday, September 25. Beginning today, May 16, Microsoft Game Studios will kick off the Halo 3 multiplayer beta, which provides audiences worldwide with an exclusive, early look at some of the multiplayer elements of Halo 3 on Xbox LIVE. Microsoft is also announcing a special edition Zune digital media player inspired by the Halo franchise. On shelves next month, the Zune-Halo 3 edition comes loaded with a collection of Halo content, including videos, soundtracks, trailers, ads and artwork.