With the Halo 3 beta just hours away from release comes this bombshell: Halo 3 will be headed to retailers on September 25 (26 if you’re unluckily living in Europe). The beta alone has caused a tremendous whirlwind of press coverage and buzz among the community, and the release of the game is only going to be bigger.

“‘Halo 3’ is much more than a video game release; it’s the biggest entertainment event of the year,” said Peter Moore, corporate vice president of Microsoft’s Interactive Entertainment Business. “On Sept. 25, we intend to deliver a finale that will go down in entertainment history and leave people around the world with an experience that will be shared and enjoyed for years to come.”

Previous proclamations from Microsoft and Bungie placed Halo 3’s release this fall, which September 25 certainly qualifies for. Many people, myself included, predicted the game would launch in November, as to avoid the October release of Grand Theft Auto IV, and to be on store shelves by the holidays. Apparently, Microsoft is instead opting to ride on the initial wave of sales in September and October, and then benefit from the holiday shopping season.

Halo 3 will no doubt be working in tandem with Mass Effect in order to counter the onslaught of PlayStation 3 titles that will be seeing release later this year. Expect to see plenty more Halo-branded things in the coming months, too – another Halo novel, the Halo 3 Zune and that limited edition Master Chief Mountain Dew can you see on the right.