Diablo 1 Diabdat.mpq ((link)) -

Part 1: What is DIABDAT.MPQ?

DIABDAT.MPQ is the primary data archive for Diablo 1 (including Hellfire expansion, where it's often called hellfire.mpq or similar).
MPQ stands for Mo'PaQ (created by Mike O'Brien), an archive format used extensively by Blizzard.

2. Graphics (*.CEL, *.CL2)

Diablo 1 did not use 3D models. Every character, monster, and object was a pre-rendered sprite saved in .CEL (Cell) or .CL2 (compressed cell) format. Inside diabdat.mpq, you’ll find: Diablo 1 Diabdat.mpq

• Place extracted files in mods/ folder.
• Run devilutionx --mod ./mods

• Fix the infamous “duping” exploit (without removing its nostalgic feel).
• Increase the stash size (the original game had a tiny 4x10 grid).
• Enable higher resolutions (by swapping sprite scaling algorithms).