Literally this mod is Essos Total War, choose one of 21 Essos or Westeros factions, and lead them to domination in Essos, you can play as Volantis, House Targaryen, Ghis factions, Dothraki, all what you want.
this a alternate music pack with got only songs,so as to keep consistency with the music style instead of having diferent songs from diferent movies as valyrian steel uses the same music from age of petty kings wich in turn used a bunch of diferent songs from difrent sources(there was even a world of warcraft song in there).