While spending some quality hands on time with Halo Wars at E3 (hint: it's good, more on that later today), Microsoft's Jim Ying, who was guiding our demo, gave us some great news for Halo fans (there are lot of them, you know). The Covenant, the alien race hellbent on humanity's destruction, will be playable in Ensemble's upcoming Xbox 360 real time strategy game Halo Wars. The only question that remains now is whether or not the parasitic Flood will also be playable. We asked, but Ensemble isn't talking. For the moment, we'll just have to be satisfied knowing that we can finally slake the Covenant's (Grunty) thirst for blood.