For every server owner should you need a collection just for testing or something else you can use my one there are just my maps and the base included.

+host_workshop_collection 2184295563

https://gtm.steamproxy.vip/sharedfiles/filedetails/?id=2184295563

If you need the map names i list every new map in here.

[L4D2] Hard Rain - The Milltown
_c4m1_milltown_a