Left 4 Dead is one of the best multiplayer games ever made. It was the intention of the game makers to make it where no two games are exactily alike. Weapons, zombies, and special affected will pop up anywhere at anytime. This is why I think this game guide it useless. It can tell you nothing but the map of levels and that is just pretty liner and no one should ever get lost in the game. Save the money for some Microsoft points (if you have an Xbox 360) to get downloadable content one day that will cost you.