The Hills Have Eyes (1977)

Taking an ill-advised detour en-route to California, the Carter family soon run into trouble when their RV breaks down in the middle of the desert. Stranded, they find themselves at the mercy of monstrous cannibals lurking in the surrounding hills.

The Hills Have Eyes Part 2 (1985)

A motocross team on their way to trial a new super-fuel head out across the desert lead by Rachel, who, unbeknownst to the rest of the group, is a survivor of the cannibal clan which menaced the Carter family several years before.