Winter War is a death match map made by Limpstein.
It's a smallish, Winter themed, map with all custom textures. It is set outside in snow covered terrain. There are two areas that are joined by a frozen stream. The fun part is you can slide on the ice.
There are ample weapons and items and should be fun for a small crowd.
Just unzip all the files to your Kingpin folder and they will be placed in the correct locations.