This weekend, Microsoft decided to release a demo version of Halo for PC to give those who haven't yet had a taste of Covenent blood a little incentive to go pick it up.
The demo includes one Single Player mission, "The Silent Cartographer," and my favorite original multiplayer map, "Blood Gulch" available for play. You can join up to 15 other players in a LAN or online game filled with rockets, plasma, and of course, tons of vehicles in this action packed demo.