Diablo: Hellfire
| Hellfire | |
|---|---|
| Front cover artwork | |
| Developer(s) | Synergistic Software | 
| Publisher(s) | Sierra On-Line | 
| Designer(s) | 
 | 
| Programmer(s) | Donald Tsang | 
| Writer(s) | Eve Forward | 
| Composer(s) | Matt Uelmen | 
| Series | Diablo | 
| Platform(s) | Microsoft Windows | 
| Release | |
| Genre(s) | Action role-playing, hack and slash | 
| Mode(s) | Single-player, multiplayer | 
Hellfire, often called Diablo: Hellfire, is an expansion pack for the video game Diablo, developed by Synergistic Software, a Sierra division, and published by Sierra On-Line in 1997. Despite the objections of Blizzard Entertainment, the Hellfire expansion was produced, permitted by Davidson & Associates, their parent company at the time. Blizzard North, who was developing the sequel Diablo II, thus imposed numerous restrictions upon Synergistic Software's development of Hellfire.
Hellfire was re-released alongside Diablo in 1998 in a bundle called Diablo + Hellfire. Hellfire was released digitally by Blizzard Entertainment on June 5, 2019 as a free add-on with every purchase of the original Diablo on GOG.com.