To run these files on modern computers, it is highly recommended to use a "Source Port" like GZDoom or Zandronum . [Heretic & Hexen] [Wads & Mods] - Doomworld
You already own the WAD file. You just need to extract it. download heretic wad full
: Offers a DRM-free version of Heretic that is easy to use with modern "source ports". To run these files on modern computers, it