<P> The film cost $95 million to make . In its opening weekend in North America, it ranked number two at the box office, making $38.8 million . The film, which received mixed reviews from critics, made $226,497,209 worldwide . The film was released on June 29, 2010 on DVD and Blu - ray . A video game based on the film developed by Activision was released for Nintendo DS on February 11, 2010 . A stand - alone sequel, Percy Jackson: Sea of Monsters, was released on August 7, 2013 . </P> <P> In New York City, Zeus and Poseidon meet at the top of the Empire State Building, where Zeus reveals that his master lightning bolt has been stolen and accuses Poseidon's demigod son, Percy Jackson, of the theft . Poseidon reminds him that Percy is unaware of his true identity, but Zeus declares that unless his master bolt is returned to Mount Olympus before the summer solstice, in two weeks' time, war will be waged between all the gods . </P> <P> Percy is a 16 - year - old boy who appears to his peers to be dyslexic and has a unique ability to stay underwater for a long time . While on a school trip to the local museum, Percy is attacked by Alecto, a Fury disguised as his substitute teacher, Mrs. Dodds who demands the lightning bolt . Percy's best friend, Grover Underwood, and his Latin teacher, Mr. Brunner--both of whom appear disabled--help Percy and scare off the fury using a pen from Brunner . Grover tells Percy to use the pen, and Percy discovers it is a sword . Upon learning of the Fury's reason for the attack, Brunner has Grover take Percy and his mother Sally to Camp Half - Blood, leaving behind Sally's abusive husband, Gabe Ugliano . However, the three are attacked by a minotaur that appears to kill Sally, who is unable to enter the camp . He uses his sword to fight the Minotaur, without initial success . Percy kills the minotaur with its own horn, then faints from shock . </P> <P> Three days later, Percy wakes up in the camp . He learns he is the son of Poseidon, Grover is a satyr and his protector, and Brunner is the centaur Chiron, also initially disguised . Chiron suggests that Percy go to Mount Olympus to convince Zeus of his innocence . Percy begins training to use his demigod powers, which include water manipulation and using water to heal . He also meets other demigods, including Annabeth Chase, daughter of Athena; and Luke Castellan, son of Hermes . Percy is visited by a fiery apparition of his uncle Hades, who reveals that Sally is with him in the Underworld and that he will return her safely if Percy hands over the lightning bolt . Defying Chiron's orders, Percy decides to go to the Underworld, joined by Grover and Annabeth . They visit Luke, who gives them a map showing the location of three pearls belonging to Hades' wife, Persephone, which they can use to escape the Underworld . They are also given a pair of winged sneakers Luke stole from his father and a shield Luke describes as his favorite . </P>

Who did percy jackson fight in the lightning thief