This is "The Black Fog" Quake 1 Single Player Map released together with the 3rd issue of the Black Fog zine on November 11th 2022
This map REQUIRES an engine with increased limits, such as Quakespasm, and Arcane Dimensions MOD to work.
It also requires the original Quake files, id1 folder to be specific. Where you get it is up to you, I have mine from gog.
If you already have all 3, use the Slipseer link and follow the instructions listed there.
Otherwise, follow these steps:
1. Download and install Quake
2. Download and install Quakespasm version 0.93.0+
3. Download and install Arcane Dimensions version 1.8 with Patch 1
4. Download and install The Black Fog map
5. Type "map mtk_blackfog" in the console to play
gl_texturemode gl_nearest_mipmap_linear strongly recommended, paste it into the console or save as autoexec.cfg file in /ad folder.