The highly anticipated second season of Prime Video's Fallout just added another big name to its cast.According to a Deadline report on Thursday, Macaulay Culkin has joined Season 2 of the video game adaptation in a recurring role. Details are a little scant, but per the article, he's "said to be playing a crazy genius-type character." IGN has reached out to Prime Video for more details.Culkin joins a cast that also includes Ella Purnell, Aaron Moten, Kyle MacLachlan, Moisés Arias, Xelia Mendes-Jones, and Walton Goggins. As the report notes, Culkin, who of course broke out as a child star in Home Alone, has already been working with Prime Video, voicing a character in animated series The Second Best Hospital in the Galaxy.Macaulay Culkin has reportedly joined the secon…