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Transformers is a 2007 American science fiction action film based on Hasbro's toy line of the same name. It is the first installment in the Transformers film series. The film is directed by Michael Bay from a screenplay by Roberto Orci and Alex Kurtzman. It stars Shia LaBeouf as Sam Witwicky, a teenager who gets caught up in a war between the heroic Autobot and the villainous Decepticon, two factions of alien robots who can disguise themselves by transforming themselves into everyday machinery, primarily vehicle. The Autobots intend to retrieve and use the AllSpark, the powerful artifact that created their robotic race that is on Earth, to rebuild their home planet Cybertron and end the war, while the Decepticons have the intention of using it to build an army by giving life to the machines of Earth. Tyrese Gibson, Josh Duhamel, Anthony Anderson, Megan Fox, Rachael Taylor, John Turturro and Jon Voight also star, while Peter Cullen and Hugo Weaving voice Optimus Prime and Megatron, respectively.

Transformers premiered on June 10, 2007, at the N Seoul Tower in Seoul, and was released on July 3 in the United States, by Paramount Pictures. The film became the fifth-highest-grossing film of 2007, grossing over $709 million worldwide, with an estimated 46 million tickets sold in the United States. Critics praised the film for the action sequences, visual effects, and sound design, but criticized the screen time for certain characters and use of product placement. The film won four awards from the Visual Effects Society and was nominated for Best Sound Editing, Best Sound Mixing, and Best Visual Effects at the 80th Academy Awards.

It was followed by six further films: Revenge of the Fallen (2009), Dark of the Moon (2011), Age of Extinction (2014), The Last Knight (2017), Bumblebee (2018) and Rise of the Beasts (2023).

The planet Cybertron was ravaged by a civil war between the two Transformer factions, the Autobots led by Optimus Prime and the Decepticon led by Megatron, for the AllSpark, a cube-like object that is the source of all Cybertronian life. The Autobots want to find the AllSpark so they can use it to rebuild Cybertron and end the war, while the Decepticons want to use it to defeat the Autobots and conquer the universe. Megatron found the AllSpark on Earth, but crash-landed in the Arctic Circle and was frozen in the ice. Captain Archibald Witwicky and his crew of explorers stumbled upon Megatron in 1897. Captain Witwicky accidentally activates Megatron's navigational system, causing his eyeglasses to be imprinted with the coordinates of the AllSpark's location. Sector 7, a secret United States government organization, discovers the AllSpark in the Colorado River and builds the Hoover Dam around it to mask its energy emissions. The still-frozen Megatron is moved into this facility and is reverse engineered to advance human technology.

Blackout (Transformers) has not been a contender in any CBUB matches.