I do believe that steam/games don't use alsa nor pulse audio directly, if you want full debug info, take a look into libSDL2 debug environment variables.
http://www.libsdl.org/release/SDL-1.2.15/docs/html/sdlenvvars.html
Please note 'debug' and 'audio' sections.
So reporting on system installed versions sounds rather unpractical.
Nothing extracted yet.
I'd like to see information about versions of installed PulseAudio and/or ALSA in the "Help -> System Information" menu, since it could be useful for sending it to game developers, if a game suffers from audio issues.