PrBoom, the purest Doom-Port? Aims to be the most stable Doom port with the
highest compatibility to the major Doom versions and highres software
rendering. Full Boom and most if not all MBF features.

The prboom.wad found in the source tree is required to play prboom, place it in
the content directory with the other doom wads.

To build the debugging symbols use:
  DEBUG=1 ./libretro-prboom.SlackBuild