Halo 3: Pardon Our Dust Trailer?

[deadpin]

Its on marketplace and Bungie.net, but what is it? Bungie mentioned a 12- hour countdown on September 25th but a countdown for what? They said it was their latest project... Any ideas?

 

[spartan]

I am assuming that it will be an add-on to the Halo 3 campaign or multiplayer. I couldn't find any specifics though. If you find anything out, PLEASE send me an Email at [email protected]. Thank man and I hope you find out some more rad info.

 

[Gravewalker]

sounds like a campaign add-on, kinda like the new campaign chapter i just recently downloaded from xboxlive