You keep extracting. You find the speech files. voice\diablo\diablostory1.wav . The voice of the Lord of Terror, his monologue about the soulstone, is just a waveform. You can see the quiet parts, the loud parts, the hiss of the original recording.
If your file is only ~25MB, you likely have the "Spawn" (demo) version. You need the full file from the original disc or a digital store to play the full campaign. Hellfire Note: The expansion, , uses its own data files ( HELLFIRE.MPQ still requires the original DIABDAT.MPQ to be present in the folder to function. Where to Get It Legally Diablo 1 Diabdat.mpq
If you're interested in learning more about Diabdat.mpq or Diablo 1 in general, here are some resources to get you started: You keep extracting
Do not edit the original MPQ in place if you want the game to work. Always extract, edit, and create a new MPQ, or use a mod loader that overrides files. The voice of the Lord of Terror, his