yes
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
!buy
buy it
you can't
yes in verus
l4d
Novemeber 3rd
about 3.00 dollars