Westworld-Yul Brynner, Richard Benjamin, James Brolin-1973 IMDb 6.9/10

An amusement park for rich vacationers, it provides its customers a way to live out their fantasies through the use of robots that provide anything they want. Two of the vacationers choose a wild west adventure. However, after a computer breakdown, they find that they are now being stalked by a rogue robot gunslinger.