This is the starting Source SDK Base 2013 Multiplayer file system that A Nights Haunting is modding off of. You will want to add this file system to your common/sdk2013multiplayer files system.
This is a compilation of all half life source models and materials for the hammer editor and file system for A Nights Haunting, unless theres anything else model and material related else where thats not located in the models and materials folder of each mod then this should be everything. This is the base that A Nights Haunting will stand on as a mod. add this to your common/sdk2013 multiplayer file system.
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These files are now packed with the mod itself. the uselessness will be weeded out over time and eventually appropriately .vpk'd.