It has become known why the game was not released simultaneously with the Fallout series

This was stated by the head of the gaming division of Microsoft Phil Spencer.

During the conversation at the Paley International Council Summit, Spencer answered a number of questions regarding the Fallout series. One of the questions touched on the topic of releasing the franchise game at the same time as the series. According to Spencer, the simultaneous release of the game project and the film adaptation would require coordinating two significantly different types of content release, which would not give creative freedom to the creators.

In addition, Spencer recalled that the release of the series increased fan interest in the Fallout 76 and Fallout Shelter service games. The Amazon show also increased the popularity of all parts of the series on Steam. However, it is not known for certain how many copies of the games were sold.