if you have steam wich you need it you go to settings and chsnage your name
a listen server is a name for a local server
l4d2 it has more zombies and its more funner.
yes
Yes, Download steam, make an account, search L4D2 and download the demo from there.
I have l4d, Not l4d2. But, there is no specific order. They're all different stories with the same people involved.
yes
you can't
!buy
yes
yes in verus
buy it
l4d