This is the landing page for a UZDoom mod that changes Doom gameplay to add some detail and worldbuilding. Should work with Lotan's Tomb or any commercial Doom IWAD.
To use, download one of the .pk7 files and run it in UZDoom like any .pk3 file. It is just a renamed 7zip, and if you open it like one you will find a file called "hd_manual.md" that contains the manual. Please read it.
Make sure you have keys bound for speed, crouch, reload, zoom, and user1 through 4.