Diablo 2 and Lord of Destruction Expansion

Diablo 2:

After possessing the body of the hero who defeated him, Diablo resumes his nefarious scheme to enslave humanity by joining forces with the other Prime Evils, Mephisto and Baal. Only you--armed with all-new weapons, spells, and armor--will be able to determine the outcome of this final encounter. As one of five distinct character types, explore the world of Diablo II--journey across distant lands, fight new villains, discover new treasures, and uncover ancient mysteries, all in the quest to stop the Lord of Terror, once and for all.

Diablo 2 Lord of Destruction:

Since the beginning of time, the forces of Order and Chaos have been engaged in an eternal struggle to decide the fate of all creation. In Diablo II: Lord of Destruction, you'll become part of this struggle as you follow Baal, the last of the Prime Evils, into the Barbarian Highlands of the north. You'll face a series of challenging new quests to prevent the vile minions of the underworld from destroying the world of Sanctuary. This expansion to Diablo II features more weapons, armor, magical items, and character classes--everything you need to fight the new monsters that await you.
Link: http://www.blizzard.com/us/diablo2/