In which 1973 film does Yul Brynner play a robotic cowboy who malfunctions and goes on a killing spree?

Yul Brynner plays a robotic cowboy who malfunctions and goes on a killing spree in the 1973 film "Westworld." Set in a futuristic amusement park where guests can interact with lifelike androids to fulfill their wildest fantasies, Brynner's character, known as "The Gunslinger," becomes relentless and deadly as he targets the park's visitors, causing chaos and destruction in his unstoppable pursuit.