Halo Wars trailer on Live

Although most of you will have supped on DOOM's Live Arcade appearance yesterday evening, there have been plenty of additions to the download-list since then - including themes and picture packs for Halo Wars.

The trailer for the Ensemble Studios-developed strategy title, announced and demonstrated in Barcelona last night, can also be found on Live Marketplace this morning, along with videos from X06 for Banjo-Kazooie, Marvel Universe Online, BioShock, Blue Dragon and Lost Odyssey.

Plenty of previously announced games are trailed too, including Call of Duty 3, Viva Pinata, Assassin's Creed, Splinter Cell: Double Agent, FIFA 07, and Rainbow Six Vegas.