Everyone has been waiting on Bungie to show off Halo 3: ODST at this year’s E3, however nobody saw the announcement of a completely new Halo game coming. Apparently the boys at Bungie have been working overtime on a top secret new game in the Halo series.

Check out the video below of Bungie showing off gameplay from ODST and the first teaser trailer for Halo: Reach from today’s Microsoft Press Conference at E3 2009. Halo: ODST is set for release on September 22, 2010 which will include a multiplayer beta for Halo: Reach, similar to how Crackdown included the beta for Halo 3. Hit the jump for the full video.