According to the recent announcement, the beta will be made available on October 23 from 7 to 11 PM (ET) and will function as the first of many stress tests for the game’s system prior to its full launch on November 14.
— Fallout (@Fallout) October 19, 2018
“During the B.E.T.A. one of our primary goals is to stress test and break the game. As such, the servers will not be running 24/7; instead, they’ll be online during targeted timeframes so we can get as many people as possible playing at the same time. Why? Because that’s the best way [to] put all our systems to the test and see how they respond,” states the Bethesda team in the official beta FAQ.
The first beta will be made available to Xbox One gamers and is currently available for pre-download. PS4 and PC gamers will have to wait until October 30 to participate in the betas for each respective platform.
Bethesda’s latest addition to the Fallout series is set in West Virginia, where players work together, or in opposition, with the common objective of survival. This is the first game in the series to not offer a singleplayer campaign but brings the most dynamic world-map yet.