As one of the classic franchises of the RPG genre, Fallout has built up an extensive timeline across its many games one that can be confusing to keep track of with each new addition. Developed first by the now-defunct Black Isle Studios and then by Bethesda (and Obsidian, for New Vegas), Fallout as a series has gone through a number of distinct changes, with each game putting a post-apocalyptic spin on a new region of the United States.