Newly released on Xbox Live is the demo for the highly anticipated Xbox 360 exclusive “Left 4 Dead”. The game has been building a generous amount of buzz. Some due to the very vocal Valve staff and their firm position against the PS3 and its unique architecture. But other buzz is genuinely from sincere interest in the game. No matter what side you are on, Valve has made a huge success out of the Half Life series, and are definitely looking for the next hit series.