Hellfire introduces players to new (single-player only) quests revolving around a powerful demon known as Na-Krul. A creature who once served as Diablo's chief minion and strongest ally, Na-Krul and his cohorts rebelled against Diablo. After a failed attempt to overthrow their master, they were banished to the Void. Freed by an evil sorceror, Na-Krul has set up command in the ancient Demon Crypts and has once again marshalled his plans to destroy Diablo and rule Hell for himself. Gathering together a small army of never-before-seen monsters, Na-Krul now poses a threat nearly as deadly as the mighty Diablo.

Note: Requires Diablo game.