it's nice to play campaign mode with friends or other players online. this game would be your favorite zombie game, and if you're familiar with the game CounterStrike it would be even better. however Versus mode is not so friendly to noob, so have fun with friends in other mode,especially campaign mode, in your first month would be much available. finally, if you have decided to play L4D, I have to warn that …JUST REMEMBER TO TAKE A REST！

it's nice to play campaign mode with friends or other players online. this game would be your favorite zombie game, and if you're familiar with the game CounterStrike it would be even better. however Versus mode is not so friendly to noob, so have fun with friends in other mode,especially campaign mode, in your first month would be much available. finally, if you have decided to play L4D, I have to warn that …JUST REMEMBER TO TAKE A REST！