New skill trees with 210 new skills, new base items, gems, runes, uniques, runewords, sets, crafting improved monster AI and new monster types, elite and heroic monsters, 28 uberquests for advanced characters, 5 challenges. Compatible with Diablo II Lord of Destruction 1.10/1.11/1.12/1.13 (PC/Mac).

zitrazz says

10/10 - Agree Disagree

Simply put, the best mod for Diablo.
This makes it a much harder and faster game with alot of content.
If you haven't played diablo 2 before, then don't play this mod as it is much harder and requires a lot knowledge of the game.