The Hordes of Chaos mod for Diablo II

The Hordes of Chaos (THOC) is a total conversion mod for Diablo II. Many aspects of the game are being changed including quests, skills, monsters, bosses, classes, NPCs, items, runes, cube recipes, and maps.

The storyline is as follows:
ACT I - The Goblin Armies
An army of goblinkind is amassing. You must blaze a trail through the throngs of monsters and find the warlords (Nah'Zul, Jehzerael, and Gruumsh) and destroy them before the goblin army marches upon civilization.

ACT II - The Wasteland
After taking out the warlords you find that the warlords have a master that brought them to power. You travel east to find this master. On the way there you find yourself in the city of Astalard. Many raids have recently taken place on the city and its visitors. You must find this group of attackers and bring them to justice before you can proceed east through the mountains.

ACT III - The Dark Forests
You have followed the trail of this Dark Master east to Spelwood Forest. Speaking with various civilians at the edge of the forest you find that the Dark Master is indeed the drow queen Durhanna. Find your way throught Spelwood Forest and find the entrance to the Underdark city of the drow.

ACT IV - Underdark
You have found your way to the Underdark, but now must search for city of the drow. Now find your way to the city to find the Mistress of Chaos, Durhanna.

ACT V - Siege
You have found and killed Durhanna, but her top general, Bursantas has already marched his army upon Firewindle Gate. You go to Firewindle Gate and go find the Lord of Chaos.