Fallout is an open world role-playing video game developed and published by Interplay Entertainment in 1997. The game has a post-apocalyptic and retro-futuristic setting, in the aftermath of a global nuclear war in an alternate history timeline mid-22nd century. The protagonist of Fallout is an inhabitant of one of the long-term shelters known as Vaults who was tasked to find the Water Chip to save other dwellers from water's shortage. Fallout is considered to be the spiritual successor to the 1988 role-playing video game Wasteland. It was initially intended to use Steve Jackson Games' system GURPS, but Interplay eventually used an internally developed system SPECIAL. The game was critically acclaimed and inspired a number of sequels and spin-off games, known collectively as the Fallout series.