Halo Wars demo is now available for download on the Xbox Live Marketplace. Halo Wars is a real time strategy game developed by Ensemble Studios set in the Halo Universe. The Story takes place 20 years before the events of Halo: Combat Evolved. Halo Wars is set for full release March 3, 2009. So if you want to check the demo out click on the link above and see if Halo Wars is for you.