Great map, very Christmassy.
A few differences here and there, some spawns for witches and tanks seem to be locked into place, and the finale is slightly closer to the Left 4 Dead 2 version of Dead Center.
The collection of gifts to unlock special rooms is a nice touch as well.
HOWEVER, you do need to have the original L4D Dead Center map also downloaded and installed, or else there are multiple texture issues and red error messages EVERYWHERE to the point that it is unplayable. Downlink link for said map is: https://www.gamemaps.com/details/8646
Posted this review
Christmas themed map, what else is needed?