Never played those before, they are deliciously old-school! Almost on the same level as a small expansion pack. Thanks a lot!
Since it's not obvious, there is a new version of the patch on May 1, 2020, the link above now points to this new version.
Download Link Update - 06.05.2021
Added additional sharpness to two icon files inside the package:
Abyss Of Pandemonium v2.0-Icon #2.ico
Abyss Of Pandemonium v2.0-Icon #3.ico
The download link has been changed (Old download link is no longer available).
New download link: