The efforts of Biff Tannen, George's bully and supervisor, further complicate Marty's situation until Marty successfully causes his parents to fall in love and simultaneously convinces George to finally stand up to Biff. Returning to the future via a lightning strike that powers the machine, Marty discovers a vastly improved situation for the McFly family, as a much more confident George has become an accomplished science fiction author, Marty's two older siblings have better lives, he owns the car of his dreams, and an apparently-softened Biff is now an auto detailer, rather than George's supervisor. Despite 1955 Doc's insistence on not knowing details of the future, a note Marty leaves in his pocket on November 12, 1955, prevents him from being killed by the terrorists. In the film's final moments, Doc Brown appears in a modified version of the DeLorean and tells Marty and his girlfriend Jennifer Parker that they must travel to the future to fix a problem caused by Marty and Jennifer's kids.
In 2010, Looney Labs introduced Back to the Future: The Card Game, a strategy game using the same mechanics as the company's game Chrononauts. In the game, a timeline of cards are laid out in a grid with each era in the movies grouped together. Randomly distributed ID cards outline goals or timeline changes necessary to make sure the future character exists. The license for this game expired in 2012 and is no longer being produced. 2b1af7f3a8