Rebalances both sides, adds monster respawn, implements a few new features, and does many more subtle things.
Found on JeffLudwig's private server. Developed by the man himself.
Visit it for FAQ, guides, and more details.
Requires a DOS emulator, like DOSBox or DOSBox-X to run the game.
The installation details are inside the archive.
Start the game as usual.
Starting a new game is obligatory.