The "Alien" (also referred to as a "Xenomorph") is a fictional endoparasitoid extraterrestrial species that is the eponymous antagonist of the Alien film series. The species made its debut in the film Alien (1979), and reappeared in the sequels Aliens (1986), Alien 3 (1992), and Alien: Resurrection (1997), as well as the crossover franchise Alien vs. Predator (2004) and Aliens vs. Predator: Requiem (2007). A similar creature of a slightly different design also briefly appears in the Ridley Scott film Prometheus (2012). In addition, the Alien appears in various literature and video game spin-offs from the franchises. Unlike many other extraterrestrial races in science fiction, the Aliens do not have a technological civilization and are predatory creatures with no higher goals than the propagation of their species and the destruction of lifeforms that could pose a threat. Like wasps or termites, Aliens are eusocial, with a single fertile queen breeding a caste of warriors. The Aliens' biological life cycle involves traumatic implantation of parasitic larvae inside living hosts, which mature before erupting from the host's chest.