The 10th Victim is a 1965 film starring Marcello Mastroianni and Ursula Andress. It’s based on Robert Sheckley’s 1953 short story “Seventh Victim”. Sheckley later published a novelization of the film (The 10th Victim) as well as two sequels Victim Prime (1987) and Hunter/Victim (1988).
The premise is that war has been replaced by legalized murder games called The Big Hunt, which provide sport and entertainment for the masses.
[via Divers and Sundry]