Porno Holocaust

Porno Holocaust is a 1981 Italian pornographic horror film directed by Joe DAmato, and written by George Eastman.

At the main camp, the ships two crew members, Pierre and Jacques, go off to collect fruit, and are followed by the beast. Pierre is bludgeoned with a rock, while Jacques is beat to death with a log. Hearing the two men being attacked, the rest of the expedition goes to investigate. The monster captures Annie and takes her to its cave lair, where Annie finds a journal. The book reveals the creature was once Antoine Domoduro, one of the islands original inhabitants who became stranded on it with his wife and daughter during the atomic bomb tests, which killed his family and mutated him.The next day, the others discover the bodies of their companions, and that the boat is gone. Captain Hardy goes in search of Annie, and finds Benoit, a reporter who had followed the researchers to the island. Dying due to severe injuries, Benoit tells Hardy that he was attacked by an ape man that is holding Annie captive in a nearby cave. Back at the camp, Antoine strangles Professor Lemuan, and kills then rapes Countess de Saint Jacques, leaving Hardy to try and rescue Annie on his own. ........

Source: Wikipedia