while testing prboom I found this message in the console output: Couldn't load MIDI from /tmp/prboom-music-IaDpVf: /etc/timidity.cfg: No such file or directory
and in fact the game had no music, only sounds. The following patch add audio/timidity as a LIB_DEPENDS, once timidity is installed, prboom plays the music as expected. Index: Makefile =================================================================== RCS file: /cvs/ports/games/prboom/Makefile,v retrieving revision 1.25 diff -u -p -r1.25 Makefile --- Makefile 28 Sep 2017 23:12:48 -0000 1.25 +++ Makefile 8 Aug 2018 08:45:51 -0000 @@ -15,7 +15,8 @@ PERMIT_PACKAGE_CDROM= Yes WANTLIB = SDL c m pthread z GL GLU SDL_mixer>=3 SDL_net>=1 png>=4 -LIB_DEPENDS = devel/sdl-mixer \ +LIB_DEPENDS = audio/timidity \ + devel/sdl-mixer \ devel/sdl-net \ graphics/png