"Apollo 18" is a science fiction horror film released in 2011. It presents a fictional account of a secret lunar mission that was supposedly conducted by NASA. The film uses a found-footage style to depict the crew's terrifying experiences on the Moon, where they encounter mysterious and dangerous phenomena. The movie is not based on actual events, as the Apollo program ended with Apollo 17 in 1972. The film suggests that the mission was kept hidden from the public, adding to its suspense. Despite its fictional premise, "Apollo 18" explores themes of isolation and the unknown in space exploration.