The expansion also adds a Monk class, new weapons and items, new missions, locations, dungeons, and enemies. Hellfire offers a non-canonical single-player storyline where players must defeat a powerful demon named Na-Krul who is threatening Tristram. Despite that, in response to Diablo players who have expressed a desire to experience the content, Blizzard has given the OK for it to be included as a free add-on with Diablo purchases on GOG.COM. Originally developed by Synergistic Software and released in 1997, Hellfire was not an official Blizzard product and did not carry Blizzard’s endorsement or label.
® multiplayer requires you to configure the Router and Firewall Ports, details can be found here.