Hellfire is the first official Diablo add-on. It is based on the original Diablo code and offers two new dungeons, a new character class, new weapons, armor, spells, potions, monsters, quests, and a number of improvements to the standard Diablo interface. Hellfire runs as an enhancement to the original Diablo, and not as a standalone "mission pack." You'll need the Diablo CD to run the new levels, and it enhances single-player mode only. There is talk of a future multiplayer patch, and although multiplayer hack programs exist, officially this is a single player game only. Hellfire improves the existing Diablo levels, while also adding original areas and items. Players can now select the difficulty level for single-player games. In nightmare mode, the creatures gain increased armor class and resistance, as well as three times their normal health plus another 100. Rewards are also increased; you gain 10 times the experience you would normally gain and 10 times the gold. In...
