While the game was being developed, Dennis Lenart wanted to include actors from the original films to reprise their characters, but some of them were unavailable at the time. Later in 2015, Tom Wilson, who played Biff Tannen, replaced Andrew Chaikin to reprise his character's voice in the "30th Anniversary Edition".
This version was released on October 2015, to celebrate the same month and year that Marty McFly and Doc Brown went to the future (October 21 2015) in Back to the Future Part II.
Contributed by ProtoSnake