In 2021, with the rise of source ports like DevilutionX and the recent hype around Diablo II: Resurrected, interest in the original game’s architecture is higher than ever. Today, let’s open the archives and look at what makes this specific file so crucial, why it is legally complicated, and how the community is keeping it alive.

The community’s insistence on using the MPQ file as a "base" for mods allowed them to sidestep copyright bullets. Modders could distribute their code freely, instructing users: "Just drop your own diabdat.mpq into the folder."