The highly ambitious Fallout 4 mod, Fallout: London, has attracted over one million players to date. 

That's according to GOG.com – the only platform on which the game is available – who reported that the title had brought in over one million users since its July 25th release.  

Team Folon started working on Fallout: London back in 2019 though initially weren't so ambitious with its scope. This changed during the COVID-19 pandemic, so the developers decided to flesh out the project. 

"Today, we couldn’t be happier to see the success that Fallout: London has become – reaching the entirety of one million owners on our platform, and achieving it on Fallout Day no less," GOG wrote. "We’d like to take this moment to wholeheartedly congratulate Team Folon on their groundbreaking record!"