Here's some footage of Project Brutality running on Linux (Mint) via ZDoom for Linux:
https://vid.me/pfcL

Interestingly, the silenced handgun and futuristic M4/M16 don't make an appearance. However, everything else seems to line up with Project Brutality's features. Weapons, enemy behavior, sound effects...just fine. Also note the intro screen being dim-lit in black & white.

Here's the (somewhat weird) setup for the zdoom.ini

[doom.autoload]
Path=Project Brutality v2.03.pk3
Path=DoomMetalVol3.wad

However, attempting to launch Doom II/Plutonia/TNT with Project Brutality is a no-go. So, you need to use a regular Brutal Doom .pk3. Nonetheless, most of Project Brutality's features will show up in Doom II/Plutonia/TNT anyway.

So, here goes:

[doom.doom2.Autoload]
Path=brutalv018a.pk3
Path=DoomMetalVol3.wad

[doom.doom2.plutonia.Autoload]
Path=brutalv018a.pk3
Path=DoomMetalVol3.wad

[doom.doom2.tnt.Autoload]
Path=brutalv018a.pk3
Path=DoomMetalVol3.wad