Despite going through its share of ups and downs over the last 15 years, Blizzard's Diablo is still arguably the definitive action RPG franchise, at least within its subgenre. 1997's Diablo and 2000's Diablo 2 helped define isometric dungeon-crawlers, and they are still impressive as long as somebody goes in with realistic expectations since they are over 20 years old by this point. Their success inspired many developers to try their hands at crafting action RPGs like Diablo, to mixed results.