Don’t want to fill you in with all Halo 3 ODST Wallpapers so I thought I rather link to the official site where you can get some nice Wallpapers from Halo 3 ODST game.
Click on the Bungie and you can list them all by clicking Next button. There is 9 cool wallpapers of Halo 3 ODST
[...] http://www.mwd.com/2009/09/halo-3-odst-wallpapers/ [...]