For a vanilla installation of (non-Hellfire), the file should be located in the root folder where you installed the game. Here are its typical characteristics:

The archive holds the game's iconic, atmospheric sound effects. This includes the localized dialogue of NPCs like Deckard Cain (" Stay awhile, and listen! ") and the ambient tracks composed by Matt Uelmen. 3. Level Tilesets ( .DUN and .TIL )

If you purchase Diablo 1 today on platforms like GOG or attempt to run it via source ports, DIABDAT.MPQ is the one file you absolutely must possess. Running Diablo on Modern Source Ports