Just finished playing two campaigns (No Mercy & Death Toll) of Left 4 Dead. This is one heck of an amazing game. Just absolutely fantastic. I played it with random people and they were pretty cool actually. We had some trouble with the final part of the No Mercy campaign when we had to wait for the chopper to arrive, but overall it went relatively smooth. I like that there is a "take a break" option with which you let the AI take over your character so the other guys can continue without you.

