World Gone Wild (1988)

In the nuclear ravaged wasteland of Earth 2087 water is as precious as life itself. The isolated Lost Wells outpost survived the holocaust and the inhabitants guard the source of their existence. Now an evil cult of renegades want control of their valuable water supply. And the villagers are no match for such brute military force. Only one man can help the stricken community - a mercenary living in a distance cannibal city.