This file acts as the "soul" of the game. Without it, modern source ports cannot function because they lack the copyrighted assets owned by Blizzard.
The DIABDAT.MPQ file remains the cornerstone for anyone looking to play the original Diablo 1 on modern hardware in 2021 and beyond. This critical data file contains the vast majority of the game's assets, including graphics, sound effects, and music. Why DIABDAT.MPQ Matters diablo 1 diabdatmpq 2021
You might ask: Why write an article about a 1997 file format in 2021? Because 2021 was the year the modding community solved Diablo 1’s biggest technical hurdles. This file acts as the "soul" of the game