Anthropophagous 2000 (1999)

The millionaire Nikos Karamanlis (Andreas Schnaas) and his family are on a boat trip, when they get into a storm, in which the daughter dies and the yacht sinks. After days without food on a life raft, Nikos needs to eat the corpse of his wife and daughter or die. Later, a group of vacationers arrive at a remote island where Niko had made his home. Now insane and craving flesh, Niko Begins to pick them off, and a few of the survivors try to fight back.