For someone who has played Tactical Ops, this map will be familiar.
Zps_Mansion is completely based on the map cs_mansion from Tactitcal Ops, 
of course with some more details and modifications for Zombie Panic! Source.

Gerke Preussner did a great a job, I had so much fun playing this map in that old game.
I hope I can bring you the same fun I had in Tactical Ops with this map now in Zombie Panic!

Survivors: Survive!

Zombies: Brainz!

Map by dopebone