Yes, Sven co-op 2 will be very special because of the ability to play co-op with your friends!
BUT... we have a long wait, and i can't wait to play 'they hunger' with friends updated onto source
I'm curious as to how they will set up HL2 gameplay with lots of people because:
Some parts of the game have buildings that collapse when you go through a door and stops you from going back the way you came but what if there are players behind you and they get trapped on the other side???
will they completely edit those bits out ?
I hope not, it would be better if they made alternative ways to go in case that happens