What is the Sniper Elite: Nazi Zombie Army 4 Pack ?

#1Bud GreenPosted 3/16/2013 3:58:18 PM
Amazon has no description except for the zombie part. And on Steam it's listed as a buying option under the $15 dollar one, but it also has no description. Is it the original game with all add-ons or something?
#2Sir_ThomasPosted 3/18/2013 7:16:24 AM
That would allow you and three friends to play co-op.