Short and oversimplified history of the franchise
Fallout is a series of post-apocalyptic role-playing video games—and later action role-playing games—created by Interplay Entertainment. The series is set during the 21st, 22nd and 23rd centuries, and its atompunk retrofuturistic setting and art work are influenced by the post-war culture of 1950s United States, with its combination of hope for the promises of technology and the lurking fear of nuclear annihilation. A forerunner of Fallout is Wasteland, a 1988 game developed by Interplay Productions to which the series is regarded as a spiritual successor.
The series' first title, Fallout, was developed by Black Isle Studios and released in 1997, and its sequel, Fallout 2, the following year. With the tactical role-playing game Fallout Tactics: Brotherhood of Steel, development was handed to Micro Forté and 14 Degrees East. In 2004, Interplay closed Black Isle Studios,[2] and continued to produce Fallout: Brotherhood of Steel, an action game with role-playing elements for the PlayStation 2 and Xbox, without Black Isle Studios. Fallout 3, the third entry in the main series, was released by Bethesda Softworks, and was followed by Fallout: New Vegas, developed by Obsidian Entertainment. Fallout 4 was released in 2015, and Fallout 76 released on November 14, 2018.
About the companies who were involved with the main Fallout Franchise as well Fallout New Vegas
Interplay Entertainment
Interplay Entertainment, game developer/publisher responsible for first and second fallout.
Black Isle Studio
Black Isle is a division company who helped Interplay develop the second Fallout game as well cancelled Fallout project, Van Burren.
ZeniMax Media
Zenimax media is an American video game holding company based in Rockville, Maryland which owns Bethesda softworks/game studio who developed Fallout 3 and future Fallout games.
Bethesda Game Studio
Bethesda is an American video game developer and a studio of ZeniMax Media and Bethesda Softworks.
Obsidian Entertainment
Obsidian Entertainment, Inc. is an American video game development studio which was founded by the ex-Black Isle employees in June 2003, shortly before close of Black Isle Studio.