Fallout: New California is a fan-made modification and is an unofficial prequel to the action role-playing video game Fallout: New Vegas, made by Brandan Lee and Radian-Helix Media. It was released in two installments, with the first installment released on May 31, 2013, and the second installment released as a beta on October 23, 2018. Originally known as Fallout: Project Brazil, the modification was renamed to Fallout: New California on September 1, 2017.
In April 2018, the project entered private beta for the second installment. The public beta for Fallout: New California was released as planned on October 23, 2018.