Westworld

Westworld is a leisure theme park where paying guests can pretend to be gunslingers, knights or roman citizens in an artificial Wild West populated by androids.
The android are often killed or exploited by tourists. But there is a malfunction in the robot system, a kind of technical disease and the game changes. Robots are chasing humans.

See also:
youtube.com - Westworld (1973) Original Trailer - Color / 3:08 mins