10th Victim (1965)

Synopsis
Based on an interesting plot from a novel by Robert Sheckley, this movie features tongue-in-cheek performances by Andress and Mastroianni, which are responsible for its status as a minor cult favorite. Set in the 21st century, this science fiction movie depicts a society in which population control is facilitated by the use of legalized murder. The society plays an assassination game for fun, in which the last person left alive is the winner. The movie is made for entertainment, but there are some sexual situations. ~ All Movie Guide