FreeDoom https://freedom.github.io and Blaspherer builds
for Freedoom. To run them under Linux/Unix, put these
in ~/.profile:

doom() {crispy-doom -iwad /usr/share/games/doom/freedoom1.wad  --mmap -mb 32'}
doom2() {crispy-doom -iwad /usr/share/games/doom/freedoom2.wad  --mmap -mb 32'}
heretic) {crispy-heretic -iwad /usr/share/games/doom/blasphem.wad  --mmap -mb 32'}

For Windows, you might know what to do.