Map should show up in the map list now

Any problems here's the Black Mesa Addon folder location (Map File)
C:\Program Files (x86)\Steam\steamapps\workshop\content\362890\3462008849

Local Disk (C:)
└📁Program Files (x86)
⠀└📁steam
⠀⠀└📁steamapps
⠀⠀⠀└📁workshop
⠀⠀⠀⠀└📁content
⠀⠀⠀⠀⠀└📁362890
⠀⠀⠀⠀⠀⠀└📁3462008849

Note you may have to extract the .vpk file
to get the map called: dm_nightmare_church_bm_rc6.bsp

Black Mesa Map folder location place the map file from the Addon here.
C:\Program Files (x86)\Steam\steamapps\common\Black Mesa\bms\maps

How to the load the Map (Video)
Video: http://gtamike.tsgk.com/Black_Mesa_Video/How_to_load_map.mp4
Video: https://youtu.be/hlrXV6Gfnf0

Steam Lunch Options (If you need them)
-windowed -noborder -oldgameui +mat_dxlevel 95

How to the load the Map
https://steamhost.cn/steamcommunity_com/workshop/filedetails/discussion/3462008849/601902639910851586/

Black Mesa Addon folder location (Map File)

Local Disk (C:)
└📁Program Files (x86)
⠀└📁steam
⠀⠀└📁steamapps
⠀⠀⠀└📁workshop
⠀⠀⠀⠀└📁content
⠀⠀⠀⠀⠀└📁362890
⠀⠀⠀⠀⠀⠀└📁3462008849

Map Source Files for Hammer World Editor Mappers (VMF, Sounds, Textures Etc)
http://gtamike.tsgk.com/Black_Mesa_VMF_and_Textures_Sounds_Etc/dm_nightmare_church_bm_rc6.rar

(Jan 2025 - patched the map)
Map: https://gamebanana.com/mods/144798