Westworld (1973) on Netflix

In a near future, the Delos Company offers the vacation of the future in in the amusement parks Medievalworld, Romanworld and Westworld for U$ 1,000 per day. The vacationers get to experience life in the themed period, doing whatever he or she wants, interacting with the robot inhabitants that populate the parks. Peter Martin and John Blane travel by hovercraft to Westworld and soon Peter duels against a Gunslinger. However, when there is a malfunctioning of the machinery, the robots get out of control, jeopardizing the guests.