Diablo is a dark fantasy action role-playing franchise created by Blizzard Entertainment. It began with the original game, which sent players down into the shadowed depths beneath the town of Tristram to face the Lord of Terror himself, and it grew into a series defined by its grim gothic atmosphere, randomly generated dungeons, and near-endless streams of loot.

Across its entries the series follows the eternal conflict between the heavens and the burning Hells, and the mortals caught between them. It is known for its fast, clicking combat, its gloomy cathedrals and crypts, and its long afterlife of expansions and seasons that keep players descending again and again.