Diablo is an action role-playing (ARPG) game released by game company Blizzard Entertainment in 1995, and is the first installment of the series. In the game, players will take on the role of a brave ronin, mage, or warrior, and go to clean up the Fear King Diablo, a great demon that poses a threat to the entire world, from the large tomb beneath the village of Tristram. Diablo was released on the MaCOS system and PC Windows system, along with the online Battle.net service, providing a multiplayer gaming experience for Diablo.