Unzip mod file into ie: e:\Diablo.II.Resurrected\mods\mad\mad.mpq Make a shortcut of D2R.exe, add -mod mad -txt ie: "e:\Diablo II Resurrected\D2R.exe" -mod mad -txt,launch game and play offline.
Boss, Elite terror zone drop items, and sunder charm drop tested in Hell 8pp everywhere, treasureclass.txt also remove hp magic potion drop, so no annoying drop sound anymore, with json file, to hide drop potion, scroll,etc names, still can be picked up.