I recently picked these up on a Steam sale for $10 total. Ridiculous deal. If anyone has these on PC, add me as a friend. (kylerules@netzero.net) The e-mail address is long dead, but Steam, as you may know, won't let you change it as your account ID.
Anyway, I have a weak spot for zombies. (What nerd/geek doesn't, right?) It doesn't get much more fun than four-player co-op campaign zombie blasting. My bro-in-law and I need two more partners. Who's with us?