Diablo is an action role-playing video game developed by Blizzard North and released by Blizzard Entertainment in January 1997, and is the first installment in the video game series of the same name. Set in the fictional Kingdom of Khanduras in the mortal realm, the player controls a lone hero battling to rid the world of Diablo, the Lord of Terror. Beneath the town of Tristram, the player journeys through sixteen randomly generated dungeon levels, ultimately entering Hell in order to face Diablo. An expansion pack, Diablo: Hellfire, was released in November 1997 by Synergistic Software. In 1998, Electronic Arts released Diablo for the PlayStation.[10] This version, developed by Climax Studios, featured direct control of the main character's direction using the PlayStation controller, as opposed to point-and-click movement. A Sega Saturn version was considered by Electronic Arts but never released.[11] Diablo has been considered one of the greatest games of all time for its randomized assignment of quests and enemies on each playthrough, online multiplayer, and graphics. The game's success led to several sequels: Diablo II in 2000, Diablo III in 2012, and Diablo IV in 2023. In 2022 a mobile-device-oriented version, Diablo Immortal, was released.