

The Gunslinger's programming allows guests to draw their guns and kill it, with the android always returning the next day for another duel. The firearms issued to the park guests have temperature sensors that prevent them from shooting anything with a high body temperature, such as humans, but allow them to "kill" the cold-blooded androids.

One of the attractions is the Gunslinger, an android programmed to instigate gunfights. Peter Martin, a first-time Delos visitor and his friend John Blane, on a repeat visit, go to Westworld. Delos's tagline in its advertising promises "Boy, have we got a vacation for you!"

For $1,000 per day, guests may indulge in any adventure with the android population of the park, including sexual encounters and a simulated fight to the death. The resort's three "worlds" are populated with lifelike androids that are practically indistinguishable from human beings, each programmed in character for their historical environment. In 1983, a high-tech, highly realistic adult amusement park called Delos features three themed "worlds": Western World (the American Old West), Medieval World ( medieval Europe) and Roman World (the ancient Roman city of Pompeii). A television series based on the film debuted in 2016 on HBO. Westworld was followed by a sequel, Futureworld (1976), and a short-lived television series, Beyond Westworld (1980).

Critical reception was largely positive by contemporary and retrospective critics and Westworld was nominated for Hugo, Nebula, and Saturn awards. It was also the first feature film to use digital image processing to pixellate photography to simulate an android point of view. The film was from an original screenplay by Crichton and was his first theatrical film as director, after one TV film. The film stars Yul Brynner as an android in the amusement park, with Richard Benjamin and James Brolin as guests of the park. The film follows adult guests visiting an interactive amusement park containing lifelike androids that unexpectedly begin to malfunction. Westworld is a 1973 American science fiction Western film written and directed by Michael Crichton.
