The story unfolds in four Acts, one for each major town. From the ruined town of Tristam, you venture forth to vanquish the evil presence of Andariel in the Monastery of the Sisters of the Sightless Eye, nestled in the frozen steppes. From there you travel across deserts and jungles to defeat the devils Mephisto and Baal until you face Diablo, the ultimate evil. Diablo II is four times larger than the original, includes five character classes, addition of 3D graphics support, day/night cycles, weather effects, hordes of enemies, as well as tons more weapons, armor, spells, items, and more. Did we mention Diablo is back?"