Search for dkpatch.zip on Doom community websites or in the ZDoom forums to locate the patch that updates the WAD to v1.1.
hexdd.wad v1.1 is a custom WAD file designed for Doom, specifically compatible with the original game on PC. The file, when installed, introduces a new set of levels, enemies, power-ups, and gameplay mechanics that deviate from the standard Doom experience. Created by an anonymous developer (or developers), hexdd.wad v1.1 was first released in the late 1990s, a time when the Doom community was thriving and user-generated content was becoming increasingly popular.
For those interested in experiencing hexdd.wad v1.1 for themselves, several online resources are available: