The Nephalem (the player's character) arrives in the town of New Tristram to investigate the fallen star. They accompany Leah to the cathedral in order to rescue Cain. After rescuing him, they learn that the only way to the fallen star is to defeat the Skeleton King (who was once called King Leoric). The Nephalem defeats him and finds a stranger where the fallen star landed. The stranger's only memory is of a sword that shattered into three pieces as he fell.
The game utilizes classic dark fantasy elements and players assume the role of a heroic character charged with saving the world of Sanctuary from the forces of Hell. Many role-playing elements are present, such as choosing a character class, gaining experience and leveling up, and acquiring more powerful equipment. The quality and attributes of equipment are randomized. In addition to base stats (such as damage and attack speed for weapons or armor points on armor) higher-quality items have additional properties such as extra damage, attribute bonuses, bonuses to critical hit chance, or sockets, which allow items to be upgraded with a gem. Magic-quality items have up to three random properties, rare-quality items have up to six, and legendary-quality items typically have up to eight with varying degrees of randomness. Set items are a subtype of legendary items which provide additional, cumulative bonuses if multiple items from the same set are equipped at once. Higher level monsters tend to drop higher level items, which tend to have higher base stats and bonuses.
Source: Wikipedia, "Diablo_III," available under the CC-BY-SA License.
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