The whtc05a9.zip file you have requested: Modifications / wHeretic (version 0.5a) build 9 - 415.71kb is not available. Perhaps try browsing all files for the game Heretic and upload any files you want to share or are missing. This is the only information we could locate:
This a WIN32 version of Heretic that I've called wHeretic for now. You need at least DirectX version 3 for this to work. It runs fine on NT4 SP6a and Win9X.